US20060254154A1 - Abrasive tool and method of making the same - Google Patents
Abrasive tool and method of making the same Download PDFInfo
- Publication number
- US20060254154A1 US20060254154A1 US11/127,085 US12708505A US2006254154A1 US 20060254154 A1 US20060254154 A1 US 20060254154A1 US 12708505 A US12708505 A US 12708505A US 2006254154 A1 US2006254154 A1 US 2006254154A1
- Authority
- US
- United States
- Prior art keywords
- abrasive
- particles
- average particle
- particle size
- substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
- B24B7/22—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain
- B24B7/228—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain for grinding thin, brittle parts, e.g. semiconductors, wafers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
- B24D7/02—Wheels in one piece
Definitions
- the invention relates to an abrasive tool and the method of making the same.
- the invention relates to a diamond abrasive tool and the method of making the same.
- the planarization technique for the oxide layer and the metal layer on the surface of wafer becomes important along with the development in the wire miniaturization and the multiple metal connection technique.
- the thickness and flatness in each layer of the wafer are strictly demanded.
- the chemical mechanical polishing (CMP) technique employs slurry and polish pad, along with mechanical polishing, to planarize the oxide layer and the metal layer of a wafer.
- This method can remove limitations in the layout design, increase the pattern density, reduce the defect density, and promote the yield.
- the required equipment of CMP includes a platen with a polish pad, and a carrier for holding a wafer and imposing a pressure thereon.
- the carrier sucks onto the back of the wafer by creating a vacuum in between.
- the part of the front surface of the wafer that requires planarization is pressed against the polish pad of the platen.
- the mechanical polishing is then performed by having a relative motion between the polish pad and the carrier.
- a polishing agent is added to create appropriate reactions for a higher polishing efficiency.
- the surface structure of the polish pad After polishing a certain time, the surface structure of the polish pad, such as its texture and roughness, will become smoother. Moreover, the debris getting off from the wafer and the slurry will deposit on the surface of the polish pad. Eventually, the polishing rate is lowered or even diminishing. Therefore, one usually has to use an abrasive tool to perform intermittent or continuous cleaning in order to remove the surface and debris of the polish pad, maintaining its roughness and elongating its lifetime.
- a conventional abrasive tool is formed by adhering abrasive particles 1 by a bonding layer 2 in a random way on the surface of a substrate 3 .
- the abrasive particles used in this type of abrasive tool are highly rigid and abrasive. Since the diamond is one of the hardest industrial materials known to date, it is often used as the super-abrasive in abrasive tools.
- this method can achieve the goal of evenly distribute the pressure to the abrasive particles
- the diamond particles sizes are limited by the pitch of the template or mesh such that the density of abrasive particles cannot be increase.
- the average size of the diamond particles for their primary conditioner products is between 100 ⁇ m and 220 ⁇ m.
- a mesh with a pitch as small as 250 ⁇ m to 350 ⁇ m has reached the limit of the template manufacturing for the conditioners with such diamond size. Therefore, it is difficult to further increase the density of diamond arrangement for the primary used conditioner products in IC factory.
- an object of the invention is to provide an abrasive tool and the method of making the same. It combines the features of regular and random abrasive particle dispositions.
- the surface of the abrasive tool is provided with a plurality of abrasive particle groups to increase the abrasive particle density and to maintain the uniform pressures on the abrasive particles. Therefore, the invention can increase the cutting rate and lifetime of the abrasive tool.
- the structure of the disclosed abrasive tool includes: a substrate, a plurality of abrasive particle groups and a bonding layer.
- the abrasive particle group consists of a plurality of abrasive particles grouped together.
- the abrasive particle groups are disposed in a regular way on the surface of the substrate.
- the bonding layer fixes the abrasive particle groups onto the substrate.
- the bonding layer can be a metal solder and/or polymer bonding layer to provide the necessary combining force for the abrasive particle.
- the bonding layer may use a low-temperature brazing material to avoid the problem of substrate deformation and diamond deterioration because of high-temperature brazing processes.
- a polymer bonding layer can completely free from the soldering process and problems derived from it.
- the invention also discloses a method of making the abrasive tool, including the steps of: providing a substrate on which surface has a bonding layer; providing an abrasive particle disposition template with a plurality of abrasive particle positioning holes in a regular pattern; aligning the abrasive particle disposition template with the substrate surface; filling the abrasive particles into the positioning holes to form a plurality of abrasive particle groups, wherein the diameter of the abrasive particle positioning holes being 1.75 to 2.5 times that of the abrasive particles; and separating the abrasive particle disposition template from the substrate, leaving the abrasive particles fixed on the substrate surface by the bonding layer.
- the abrasive positioning holes are designed to have an appropriate size so that a single hole can accommodate a plurality of abrasive particles to form an abrasive particle group.
- the abrasive positioning holes may have different patterns according to the abrasive tool that one wants to form.
- the abrasive positioning holes are preferably disposed in a shape of the donut type or the segment type.
- the pitch between the abrasive positioning holes is preferably to be greater than the diameter of the abrasive particle positioning holes by at least 75 ⁇ m. This is more practical in mass-producing the abrasive particle disposition template.
- FIG. 1 is a schematic cross-sectional view of the polish pad conditioner in an embodiment of the invention
- FIGS. 2A to 2 E are schematic cross-sectional views of the steps for making the polish pad conditioner according to the embodiment of the invention.
- FIG. 3 is a schematic view of a micro picture of the disclosed polish pad conditioner
- FIG. 4 is schematic view of randomly distributed abrasive particles in the prior art
- FIG. 5 is a schematic view of regularly distributed abrasive particles in the prior art.
- FIG. 6 is a flowchart of the steps for making the polish pad conditioner according to another embodiment of the invention.
- the disclosed abrasive tool and the method of making the same can increase the cutting rate of the abrasive tool and solve the problem of falling abrasive particles due to non-uniform pressures.
- the disclosed abrasive tool thus has a better polishing homogeneity and longer lifetime.
- the invention is particularly of use for making the polish pad conditioner/dresser in high-precision CMP. Therefore, we explain the structure of the polish pad conditioner/dresser that utilizes the invention and the method of making the same. We use diamond particles as the abrasive particles.
- the polish pad conditioner/dresser in this embodiment includes: a substrate 100 , a plurality of diamond particle groups 200 , and a bonding layer 110 .
- Each diamond particle group 200 consists of several diamond particles 210 grouped together.
- the diamond particle groups 200 are disposed in a regular pattern on the surface of the substrate 100 , separated by a fixed pitch.
- the bonding layer 110 on the surface of the substrate 100 fixes to the diamond particle groups 200 onto the substrate 100 . Therefore, the cutting load can be evenly distributed to all the diamond particle groups 200 .
- the invention has a higher diamond uniformity of distribution in the polishing region than the random distribution in the prior art because of the feature of regular diamond particle groups.
- the bonding layer can be made of a polymer bonding agent, a metal electroplating layer, or a metal brazing material, or any other bonding agent with a sufficient combining force with the substrate.
- the polymer bonding agent is a room-temperature curable resin that naturally cures after a certain time. It can also be a resin that cures under heat or light so that it can be firmly fixed on the substrate after heating, baking or ultraviolet (UV) radiation.
- the metal electroplating layer is made by wrapping the bottom of the diamond particles on the substrate using electroplating nickel (or some other metal).
- the metal brazing material is melted using high-temperature vacuum furnace brazing method to fix the diamond particles on the metal substrate.
- metal powders as the bonding layer to fix the diamond particles by high-temperature sintering.
- FIGS. 2A to 2 E are schematic cross-sectional views of the steps for making the polish pad conditioner/dresser in the embodiment of the invention.
- a substrate 100 coated with a polymer bonding layer 110 on its surface is provided.
- an abrasive particle disposition template 300 with a plurality of abrasive particles positioning holes 310 disposed in a regular pattern is provided.
- the abrasive particle disposition template 300 is used to make the diamond particles 210 be disposed in the predetermined pattern and to limit the number and positions of them. Therefore, the pattern and diameter size of the abrasive positioning holes in the abrasive particle disposition template 300 are designed according to different needs. Limited by the feasibility of mass production, strength, and lifetime of the abrasive particle disposition template 300 , the diameter of the abrasive particle disposition holes 310 is preferably smaller than their pitch by at least 75 ⁇ m.
- the pitch between the abrasive particle positioning holes 310 in a high density is preferably between 250 microns and 700 microns.
- the actual design of the pitch is determined by the size of the abrasive particles. If the pitch is too large, the effect of increasing the diamond density is diminishing. If the pitch is too small, then it will be very difficult to make he abrasive particle disposition template, and only small diamond particles can be used in this case.
- the abrasive particle disposition template 300 is aligned and stacked on the surface of the substrate 100 .
- the diamond particles 210 are filled into the abrasive particle positioning holes 310 to form several diamond particle groups 200 .
- An appropriate pressure can be imposed to embed the diamond particles 210 slightly more into the bonding layer 110 .
- the diameter of the abrasive particle positioning holes 310 is preferably designed to be between 1.75 and 2.5 times of the diameter of the diamond particles 210 because the diamond crystals have different shapes and sizes.
- each diamond particle group preferably has an average number of 2 to 8.
- the diamond particles 210 when the diamond particles 210 go through the abrasive particle positioning holes 310 to form a diamond particle group 200 , the chances that the sharp ends of the diamond particles 210 point upward are increased; and so is the cutting rate. At the same time, the diamond particles in the diamond particle group can have a uniform distribution.
- the abrasive particle disposition template 300 is separated and the bonding layer 110 is cured, so that the diamond particles 210 form a plurality of diamond particle groups in a regular pattern. They are fixed on the surface of the substrate by the bonding layer 110 .
- the disclosed polish pad conditioner/dresser can be manufactured by brazing.
- a substrate of the kind mentioned above is provided (step 601 ).
- An adhesive or glue is used to combine a brazing material with the substrate (step 602 ).
- the brazing material can be a foil, powders, or a mixture of powders and organic binder from mixing and rolling, and is adhered on an area (or areas) on the substrate which diamond particles will be coated (or called diamond area)
- the abrasive particles are distributed regularly on the substrate in the form of abrasive particle groups (step 603 ).
- the diamond area may be coated with a second adhesive or glue. This can be done before or after distributing the abrasive particles.
- the abrasive particles are permanently fixed on the substrate by brazing (step 604 ).
- each diamond particle group consists of a plurality of diamond particles grouped together.
- the diamond particle groups are disposed in a regular pattern with a fixed pitch on the surface of the substrate.
- the derived diamond pitch is obtained from the pitch of the abrasive particle positioning holes on the template and the number of diamond particles in a single hole. From the results in Table 1, one sees that the cutting rate of the diamond particle group conditioner/dresser with multiple diamond particles in one hole is far larger than that of the diamond particle group conditioner/dresser with a single diamond in one hole.
Abstract
An abrasive tool includes a substrate, a plurality of abrasive particle groups, and a bonding layer. The abrasive particle group consists of a plurality of abrasive particles grouped together. The abrasive particle groups are disposed in a regular pattern on the surface of the substrate and fixed on the surface by the bonding layer. To control the disposition of the abrasive particle groups, an abrasive particle template is used to form the required pattern. The size of the abrasive particle positioning holes on the template is used to adjust the number of particles in an abrasive particle group.
Description
- 1. Field of Invention
- The invention relates to an abrasive tool and the method of making the same. In particular, the invention relates to a diamond abrasive tool and the method of making the same.
- 2. Related Art
- In the manufacturing process of deep sub-micro semiconductor devices, the planarization technique for the oxide layer and the metal layer on the surface of wafer becomes important along with the development in the wire miniaturization and the multiple metal connection technique. In order to have a dense circuit in a small area, the thickness and flatness in each layer of the wafer are strictly demanded.
- The chemical mechanical polishing (CMP) technique employs slurry and polish pad, along with mechanical polishing, to planarize the oxide layer and the metal layer of a wafer. This method can remove limitations in the layout design, increase the pattern density, reduce the defect density, and promote the yield. In short, the required equipment of CMP includes a platen with a polish pad, and a carrier for holding a wafer and imposing a pressure thereon. The carrier sucks onto the back of the wafer by creating a vacuum in between. The part of the front surface of the wafer that requires planarization is pressed against the polish pad of the platen. The mechanical polishing is then performed by having a relative motion between the polish pad and the carrier. A polishing agent is added to create appropriate reactions for a higher polishing efficiency.
- After polishing a certain time, the surface structure of the polish pad, such as its texture and roughness, will become smoother. Moreover, the debris getting off from the wafer and the slurry will deposit on the surface of the polish pad. Eventually, the polishing rate is lowered or even diminishing. Therefore, one usually has to use an abrasive tool to perform intermittent or continuous cleaning in order to remove the surface and debris of the polish pad, maintaining its roughness and elongating its lifetime.
- As shown in
FIG. 4 , a conventional abrasive tool is formed by adheringabrasive particles 1 by abonding layer 2 in a random way on the surface of asubstrate 3. The abrasive particles used in this type of abrasive tool are highly rigid and abrasive. Since the diamond is one of the hardest industrial materials known to date, it is often used as the super-abrasive in abrasive tools. - In a CMP process, however, the abrasive particles fixed on the surface of the abrasive tool often cannot be held tightly on the surface of the metal substrate. Therefore, abrasive particles often get off from the abrasive tool. These lost particles are likely to damage precision and expensive wafers. In particular, since the abrasive particles are random disposed on the abrasive tool, their distribution may be non-uniform such that the abrasive particles are under different pressures. This is why the abrasive particles may fall off due to insufficient adhesive power and why the polishing effect is unstable. To further extend the lifetime of the abrasive tool and to improve its polishing effect, proposals are made to evenly and regularly distribute the
abrasive particles 4 on the abrasive tool 5 (such as the matrix arrangement inFIG. 5 ) in place of the random disposition in the prior art. For example, U.S. Pat. Nos. 4,925,457 and 5,092,910, “Abrasive tool and method for making”, disclose an abrasive tool that uses a mesh to form a regularly disposed pattern of abrasive particles and the sintering process for making it. - The diamond particles in the abrasive tools for the manufacturing of wafers that have high precision and high added values have to be optimized in the following factors: pattern, pitch, particle size, protrusion height, homogeneity, and the crystal shape (i.e. the sharpness). To increase the cutting rate of the abrasive tool, one usually has to (a) increase the sharpness of the diamond particles or (b) increase the density of diamond particles. However, using highly sharp diamond particles may have the risk of breaking them because of their lower strength. Therefore, it is safer to make a CMP pad conditioner (or disk) with a high density of diamond particles to increase its cutting rate. One uses a template or a mesh with a previously designed pattern to position and dispose the abrasive particles in a uniform and regular way on the abrasive tool. Although this method can achieve the goal of evenly distribute the pressure to the abrasive particles, the diamond particles sizes are limited by the pitch of the template or mesh such that the density of abrasive particles cannot be increase. For a conditioner with regular diamond positioning used in a CMP process in an IC factory, the average size of the diamond particles for their primary conditioner products is between 100 μm and 220 μm. However, a mesh with a pitch as small as 250 μm to 350 μm has reached the limit of the template manufacturing for the conditioners with such diamond size. Therefore, it is difficult to further increase the density of diamond arrangement for the primary used conditioner products in IC factory.
- In view of the foregoing, an object of the invention is to provide an abrasive tool and the method of making the same. It combines the features of regular and random abrasive particle dispositions. The surface of the abrasive tool is provided with a plurality of abrasive particle groups to increase the abrasive particle density and to maintain the uniform pressures on the abrasive particles. Therefore, the invention can increase the cutting rate and lifetime of the abrasive tool.
- The structure of the disclosed abrasive tool includes: a substrate, a plurality of abrasive particle groups and a bonding layer. The abrasive particle group consists of a plurality of abrasive particles grouped together. The abrasive particle groups are disposed in a regular way on the surface of the substrate. The bonding layer fixes the abrasive particle groups onto the substrate.
- The bonding layer can be a metal solder and/or polymer bonding layer to provide the necessary combining force for the abrasive particle. The bonding layer may use a low-temperature brazing material to avoid the problem of substrate deformation and diamond deterioration because of high-temperature brazing processes. A polymer bonding layer can completely free from the soldering process and problems derived from it.
- The invention also discloses a method of making the abrasive tool, including the steps of: providing a substrate on which surface has a bonding layer; providing an abrasive particle disposition template with a plurality of abrasive particle positioning holes in a regular pattern; aligning the abrasive particle disposition template with the substrate surface; filling the abrasive particles into the positioning holes to form a plurality of abrasive particle groups, wherein the diameter of the abrasive particle positioning holes being 1.75 to 2.5 times that of the abrasive particles; and separating the abrasive particle disposition template from the substrate, leaving the abrasive particles fixed on the substrate surface by the bonding layer.
- In particular, the abrasive positioning holes are designed to have an appropriate size so that a single hole can accommodate a plurality of abrasive particles to form an abrasive particle group. The abrasive positioning holes may have different patterns according to the abrasive tool that one wants to form. The abrasive positioning holes are preferably disposed in a shape of the donut type or the segment type. The pitch between the abrasive positioning holes is preferably to be greater than the diameter of the abrasive particle positioning holes by at least 75 μm. This is more practical in mass-producing the abrasive particle disposition template.
- The invention will become more fully understood from the detailed description given hereinbelow illustration only, and thus are not limitative of the present invention, and wherein:
-
FIG. 1 is a schematic cross-sectional view of the polish pad conditioner in an embodiment of the invention; -
FIGS. 2A to 2E are schematic cross-sectional views of the steps for making the polish pad conditioner according to the embodiment of the invention; -
FIG. 3 is a schematic view of a micro picture of the disclosed polish pad conditioner; -
FIG. 4 is schematic view of randomly distributed abrasive particles in the prior art; -
FIG. 5 is a schematic view of regularly distributed abrasive particles in the prior art; and -
FIG. 6 is a flowchart of the steps for making the polish pad conditioner according to another embodiment of the invention. - As described above, the disclosed abrasive tool and the method of making the same can increase the cutting rate of the abrasive tool and solve the problem of falling abrasive particles due to non-uniform pressures. The disclosed abrasive tool thus has a better polishing homogeneity and longer lifetime. The invention is particularly of use for making the polish pad conditioner/dresser in high-precision CMP. Therefore, we explain the structure of the polish pad conditioner/dresser that utilizes the invention and the method of making the same. We use diamond particles as the abrasive particles.
- With reference to
FIG. 1 , it is seen that the polish pad conditioner/dresser in this embodiment includes: asubstrate 100, a plurality ofdiamond particle groups 200, and abonding layer 110. Eachdiamond particle group 200 consists ofseveral diamond particles 210 grouped together. Thediamond particle groups 200 are disposed in a regular pattern on the surface of thesubstrate 100, separated by a fixed pitch. Thebonding layer 110 on the surface of thesubstrate 100 fixes to thediamond particle groups 200 onto thesubstrate 100. Therefore, the cutting load can be evenly distributed to all thediamond particle groups 200. With the same amount of diamond particles, the invention has a higher diamond uniformity of distribution in the polishing region than the random distribution in the prior art because of the feature of regular diamond particle groups. - The bonding layer can be made of a polymer bonding agent, a metal electroplating layer, or a metal brazing material, or any other bonding agent with a sufficient combining force with the substrate. The polymer bonding agent is a room-temperature curable resin that naturally cures after a certain time. It can also be a resin that cures under heat or light so that it can be firmly fixed on the substrate after heating, baking or ultraviolet (UV) radiation. The metal electroplating layer is made by wrapping the bottom of the diamond particles on the substrate using electroplating nickel (or some other metal). The metal brazing material is melted using high-temperature vacuum furnace brazing method to fix the diamond particles on the metal substrate. Moreover, one may use metal powders as the bonding layer to fix the diamond particles by high-temperature sintering. One may also use ceramic materials in the bonding layer.
-
FIGS. 2A to 2E are schematic cross-sectional views of the steps for making the polish pad conditioner/dresser in the embodiment of the invention. - As shown in
FIG. 2A , asubstrate 100 coated with apolymer bonding layer 110 on its surface is provided. - As shown in
FIG. 2B , an abrasiveparticle disposition template 300 with a plurality of abrasive particles positioning holes 310 disposed in a regular pattern is provided. The abrasiveparticle disposition template 300 is used to make thediamond particles 210 be disposed in the predetermined pattern and to limit the number and positions of them. Therefore, the pattern and diameter size of the abrasive positioning holes in the abrasiveparticle disposition template 300 are designed according to different needs. Limited by the feasibility of mass production, strength, and lifetime of the abrasiveparticle disposition template 300, the diameter of the abrasive particle disposition holes 310 is preferably smaller than their pitch by at least 75 μm. Therefore, there is enough space between the holes, making the hole drilling of the abrasive particle disposition template much easier. It is also unlikely to have the problem of broken holes in practical uses. In other words, the pitch of the abrasive particle positioning holes is preferably greater than the diameter of the abrasive particle positioning holes by 75 μm. Thus, it is more feasible from the viewpoints of mass production and technical details. For the diamond particles mostly used in a CMP polish pad conditioner/dresser with a regular distribution of diamond particles, their average particle size is mostly between 100 μm and 220 μm. For example, using the diamond particles US mesh #70/75 (average particle size ˜210 μm), #80/90 (average particle size ˜180 μm), #100/120 (average particle size ˜150 g m) #120/140 (average particle size ˜125 μg m), or #140/170 (average particle size ˜110 m), the pitch between the abrasive particle positioning holes 310 in a high density is preferably between 250 microns and 700 microns. However, the actual design of the pitch is determined by the size of the abrasive particles. If the pitch is too large, the effect of increasing the diamond density is diminishing. If the pitch is too small, then it will be very difficult to make he abrasive particle disposition template, and only small diamond particles can be used in this case. - As shown in
FIG. 2C , the abrasiveparticle disposition template 300 is aligned and stacked on the surface of thesubstrate 100. - As shown in
FIG. 2D , thediamond particles 210 are filled into the abrasive particle positioning holes 310 to form severaldiamond particle groups 200. An appropriate pressure can be imposed to embed thediamond particles 210 slightly more into thebonding layer 110. Generally speaking, to accommodateseveral diamond particles 210 in a single abrasiveparticle positioning hole 310, the diameter of the abrasive particle positioning holes 310 is preferably designed to be between 1.75 and 2.5 times of the diameter of thediamond particles 210 because the diamond crystals have different shapes and sizes. Using the design of different diamond size and diameter of the abrasive particle positioning holes, each diamond particle group preferably has an average number of 2 to 8. In particular, when thediamond particles 210 go through the abrasive particle positioning holes 310 to form adiamond particle group 200, the chances that the sharp ends of thediamond particles 210 point upward are increased; and so is the cutting rate. At the same time, the diamond particles in the diamond particle group can have a uniform distribution. - As shown in
FIG. 2E , the abrasiveparticle disposition template 300 is separated and thebonding layer 110 is cured, so that thediamond particles 210 form a plurality of diamond particle groups in a regular pattern. They are fixed on the surface of the substrate by thebonding layer 110. - On the other hand, the disclosed polish pad conditioner/dresser can be manufactured by brazing. As shown in
FIG. 6 , a substrate of the kind mentioned above is provided (step 601). An adhesive or glue is used to combine a brazing material with the substrate (step 602). The brazing material can be a foil, powders, or a mixture of powders and organic binder from mixing and rolling, and is adhered on an area (or areas) on the substrate which diamond particles will be coated (or called diamond area) Afterwards, the abrasive particles are distributed regularly on the substrate in the form of abrasive particle groups (step 603). To fix the abrasive particles, the diamond area may be coated with a second adhesive or glue. This can be done before or after distributing the abrasive particles. Finally, the abrasive particles are permanently fixed on the substrate by brazing (step 604). - With reference to
FIG. 3 , each diamond particle group consists of a plurality of diamond particles grouped together. The diamond particle groups are disposed in a regular pattern with a fixed pitch on the surface of the substrate. - To illustrate that the invention can indeed increase the cutting rate, we compare the abrasive tool with single diamond particles disposed in a regular pattern as in the prior art and the disclosed conditioner formed with diamond particle groups disposed in a regular pattern. Here we use diamond particles of the same size and abrasive particle disposition template with abrasive particle positioning holes of the same pitch to make the conditioner. Average cutting rates are obtained after many times of experiments. The experimental parameters and measurement results are given in Table 1.
TABLE 1 No. of diamond Pitch of abrasive Derived particles in a single hole Average Particle particle positioning diamond (average no. of particles cutting (us mesh) holes on the template pitch in a diamond group) rate First Set Multiple diamond #80/90 400 147 2.73 369.5 particles in one hole Single diamond in #80/90 400 400 1 283.7 one hole Second Set Multiple diamond #70/75 550 163 3.37 324.7 particles in one hole Single diamond in #70/75 550 550 1 65.8 one hole Third Set Multiple diamond #70/75 450 134 3.37 523.8 particles in one hole Single diamond in #70/75 450 450 1 20.8 one hole - The derived diamond pitch is obtained from the pitch of the abrasive particle positioning holes on the template and the number of diamond particles in a single hole. From the results in Table 1, one sees that the cutting rate of the diamond particle group conditioner/dresser with multiple diamond particles in one hole is far larger than that of the diamond particle group conditioner/dresser with a single diamond in one hole.
- Through the uniform distribution of the regular patterned abrasive particle groups in the abrasive tool, the invention can prevent the particles from falling due to inhomogeneous pressures. The abrasive particles can be evenly worn away, and the lifetime of the abrasive tool can be longer. The cut rate is also increased by increasing the abrasive particle density of distribution on the diamond area. The disclosed method can effectively control the disposition of the abrasive particle groups. The size of the abrasive particle positioning holes controls the number of particles in the hole, i.e. the number of particles in each abrasive particle group.
- Certain variations would be apparent to those skilled in the art, which variations are considered within the spirit and scope of the claimed invention.
Claims (19)
1. An abrasive tool, comprising:
a substrate;
a plurality of abrasive particle groups disposed in a regular pattern on a surface of the substrate, each of the abrasive particle groups consisting of a plurality of abrasive particles, the pitch of the abrasive particle groups being below 700 μm, each of the abrasive particle groups containing 2 to 8 abrasive particles; and
a bonding layer for fixing the abrasive particles on the substrate.
2. The abrasive tool of claim 1 , wherein the abrasive particles are diamond particles.
3. The abrasive tool of claim 2 , wherein the average particle size of the diamond particles is between 100 μm and 220 μm.
4. The abrasive tool of claim 2 , wherein the size of the diamond particles is selected from the group consisting of US mesh #70/75 (average particle size ˜210 μm), #80/90 (average particle size ˜180 μg m), #100/120 (average particle size ˜150 μm), #120/140 (average particle size ˜125 μm), and #140/170 (average particle size ˜110 μm).
5. The abrasive tool of claim 1 , wherein the bonding layer is selected from the group consisting of metal, ceramic, and polymer bonding agents.
6. The abrasive tool of claim 3 , wherein the metal bonding layer is formed by brazing a Ni—Cr alloy material.
7. The abrasive tool of claim 3 , wherein the polymer bonding layer is selected from the group consisting of a room-temperature curing resin, a thermal curing resin, and a photo-curing resin.
8. A method of making an abrasive tool, comprising the steps of:
providing a substrate on which surface has a bonding layer;
providing an abrasive particle disposition template with a plurality of abrasive particle positioning holes disposed in a regular pattern, the pitch of the abrasive particle positioning holes being below 700 microns;
aligning and stacking the abrasive particle disposition template on the surface of the substrate;
filling abrasive particles in the abrasive particle positioning holes to form a plurality of abrasive particle groups, the diameter of the abrasive particle positioning holes being between 1.75 and 2.5 times the average particle size of the abrasive particles;
separating the abrasive particle disposition template; and
fixing the plurality of abrasive particles on the surface of the substrate by the bonding layer.
9. The method of claim 8 , wherein each of the abrasive particle groups contains 2 to 8 abrasive particles.
10. The method of claim 9 , wherein the abrasive particles are diamond particles.
11. The method of claim 10 , wherein the average particle size of the diamond particles is between 100 μm and 220 μm.
12. The method of claim 10 , wherein the size of the diamond particles is selected from the group consisting of US mesh #70/75 (average particle size 210 μm), #80/90 (average particle size ˜180 μm), #100/120 (average particle size ˜150 μm), #120/140 (average particle size ˜125 μm), and #140/170 (average particle size ˜110 μm).
13. The method of claim 6 , wherein the bonding layer is selected from the group consisting of a metal brazing material, a metal electroplating layer, a ceramic bonding agent, and a polymer bonding agent.
14. The method of claim 10 , wherein the metal brazing material is a Ni—Cr alloy material.
15. The method of claim 10 , wherein the polymer bonding layer is selected from the group consisting of a room-temperature curing resin, a thermal curing resin, and a photo-curing resin.
16. A method of making an abrasive tool, comprising the steps of:
providing a substrate;
forming a brazing material on a surface of the substrate;
distributing a plurality of abrasive particle groups on the brazing material in a regular pattern, the pitch between the abrasive particle groups being below 700 microns and each of the abrasive particle groups containing 2 to 8 abrasive particles; and
fixing the abrasive particles on the surface of the substrate by brazing.
17. The method of claim 16 , wherein the abrasive particles are diamond particles.
18. The method of claim 17 , wherein the average particle size of the diamond particles is between 100 μm and 220 μm.
19. The method of claim 18 , wherein the size of the diamond particles is selected from the group consisting of US mesh #70/75 (average particle size ˜210 μm), #80/90 (average particle size ˜180 μm), #100/120 (average particle size ˜150 μm), #120/140 (average particle size ˜125 μm), and #140/170 (average particle size ˜110 μm).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/127,085 US20060254154A1 (en) | 2005-05-12 | 2005-05-12 | Abrasive tool and method of making the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/127,085 US20060254154A1 (en) | 2005-05-12 | 2005-05-12 | Abrasive tool and method of making the same |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060254154A1 true US20060254154A1 (en) | 2006-11-16 |
Family
ID=37417707
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/127,085 Abandoned US20060254154A1 (en) | 2005-05-12 | 2005-05-12 | Abrasive tool and method of making the same |
Country Status (1)
Country | Link |
---|---|
US (1) | US20060254154A1 (en) |
Cited By (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070060026A1 (en) * | 2005-09-09 | 2007-03-15 | Chien-Min Sung | Methods of bonding superabrasive particles in an organic matrix |
US20090229592A1 (en) * | 2006-02-28 | 2009-09-17 | Ehwa Diamond Industrial Co., Ltd. | Cutting tip of frame saw and frame saw with the cutting tip |
US20100022174A1 (en) * | 2008-07-28 | 2010-01-28 | Kinik Company | Grinding tool and method for fabricating the same |
US7762872B2 (en) | 2004-08-24 | 2010-07-27 | Chien-Min Sung | Superhard cutters and associated methods |
US20100186887A1 (en) * | 2006-07-26 | 2010-07-29 | Kinik Company | Dies for manufaturing diamond discs |
US20120060426A1 (en) * | 2006-09-22 | 2012-03-15 | Saint-Gobain Abrasifs | Conditioning Tools and Techniques for Chemical Mechanical Planarization |
US8342910B2 (en) | 2009-03-24 | 2013-01-01 | Saint-Gobain Abrasives, Inc. | Abrasive tool for use as a chemical mechanical planarization pad conditioner |
US8393934B2 (en) | 2006-11-16 | 2013-03-12 | Chien-Min Sung | CMP pad dressers with hybridized abrasive surface and related methods |
US8393938B2 (en) | 2007-11-13 | 2013-03-12 | Chien-Min Sung | CMP pad dressers |
US8398466B2 (en) | 2006-11-16 | 2013-03-19 | Chien-Min Sung | CMP pad conditioners with mosaic abrasive segments and associated methods |
US8622787B2 (en) | 2006-11-16 | 2014-01-07 | Chien-Min Sung | CMP pad dressers with hybridized abrasive surface and related methods |
US8657652B2 (en) | 2007-08-23 | 2014-02-25 | Saint-Gobain Abrasives, Inc. | Optimized CMP conditioner design for next generation oxide/metal CMP |
US8777699B2 (en) | 2010-09-21 | 2014-07-15 | Ritedia Corporation | Superabrasive tools having substantially leveled particle tips and associated methods |
US8905823B2 (en) | 2009-06-02 | 2014-12-09 | Saint-Gobain Abrasives, Inc. | Corrosion-resistant CMP conditioning tools and methods for making and using same |
US8951099B2 (en) | 2009-09-01 | 2015-02-10 | Saint-Gobain Abrasives, Inc. | Chemical mechanical polishing conditioner |
US8974270B2 (en) | 2011-05-23 | 2015-03-10 | Chien-Min Sung | CMP pad dresser having leveled tips and associated methods |
US9011563B2 (en) | 2007-12-06 | 2015-04-21 | Chien-Min Sung | Methods for orienting superabrasive particles on a surface and associated tools |
US9138862B2 (en) | 2011-05-23 | 2015-09-22 | Chien-Min Sung | CMP pad dresser having leveled tips and associated methods |
US9199357B2 (en) | 1997-04-04 | 2015-12-01 | Chien-Min Sung | Brazed diamond tools and methods for making the same |
US9221154B2 (en) | 1997-04-04 | 2015-12-29 | Chien-Min Sung | Diamond tools and methods for making the same |
US9238207B2 (en) | 1997-04-04 | 2016-01-19 | Chien-Min Sung | Brazed diamond tools and methods for making the same |
US9409280B2 (en) | 1997-04-04 | 2016-08-09 | Chien-Min Sung | Brazed diamond tools and methods for making the same |
US9463552B2 (en) | 1997-04-04 | 2016-10-11 | Chien-Min Sung | Superbrasvie tools containing uniformly leveled superabrasive particles and associated methods |
US9475169B2 (en) | 2009-09-29 | 2016-10-25 | Chien-Min Sung | System for evaluating and/or improving performance of a CMP pad dresser |
WO2016205267A1 (en) * | 2015-06-19 | 2016-12-22 | 3M Innovative Properties Company | Systems and methods for making abrasive articles |
WO2017007703A1 (en) * | 2015-07-08 | 2017-01-12 | 3M Innovative Properties Company | Systems and methods for making abrasive articles |
US9724802B2 (en) | 2005-05-16 | 2017-08-08 | Chien-Min Sung | CMP pad dressers having leveled tips and associated methods |
CN107336148A (en) * | 2017-08-01 | 2017-11-10 | 华侨大学 | A kind of quick method for preparing abrasive particle pattern distribution mill |
CN107336150A (en) * | 2017-08-01 | 2017-11-10 | 华侨大学 | A kind of method that deposition prepares abrasive particle pattern distribution mill |
US9868100B2 (en) | 1997-04-04 | 2018-01-16 | Chien-Min Sung | Brazed diamond tools and methods for making the same |
CN110312594A (en) * | 2016-12-21 | 2019-10-08 | 3M创新有限公司 | The system and method for being used to prepare abrasive product |
CN110509195A (en) * | 2019-07-15 | 2019-11-29 | 郑州磨料磨具磨削研究所有限公司 | A kind of resin abrasive tools and preparation method thereof |
CN113043178A (en) * | 2021-03-17 | 2021-06-29 | 江苏韦尔博新材料科技有限公司 | Brazing diamond grinding and polishing sheet and preparation process thereof |
CN114248209A (en) * | 2021-12-24 | 2022-03-29 | 江苏韦尔博新材料科技有限公司 | Diamond-solder composite belt and preparation process of brazed diamond tool based on same |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3894673A (en) * | 1971-11-04 | 1975-07-15 | Abrasive Tech Inc | Method of manufacturing diamond abrasive tools |
US4925457A (en) * | 1989-01-30 | 1990-05-15 | Dekok Peter T | Abrasive tool and method for making |
US6306025B1 (en) * | 1997-06-13 | 2001-10-23 | Nec Corporation | Dressing tool for the surface of an abrasive cloth and its production process |
US20050076577A1 (en) * | 2003-10-10 | 2005-04-14 | Hall Richard W.J. | Abrasive tools made with a self-avoiding abrasive grain array |
-
2005
- 2005-05-12 US US11/127,085 patent/US20060254154A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3894673A (en) * | 1971-11-04 | 1975-07-15 | Abrasive Tech Inc | Method of manufacturing diamond abrasive tools |
US4925457A (en) * | 1989-01-30 | 1990-05-15 | Dekok Peter T | Abrasive tool and method for making |
US5092910A (en) * | 1989-01-30 | 1992-03-03 | Dekok Peter T | Abrasive tool and method for making |
US4925457B1 (en) * | 1989-01-30 | 1995-09-26 | Ultimate Abrasive Syst Inc | Method for making an abrasive tool |
US5092910B1 (en) * | 1989-01-30 | 1995-09-26 | Ultimate Abrasive Syst Inc | Abrasive tool |
US6306025B1 (en) * | 1997-06-13 | 2001-10-23 | Nec Corporation | Dressing tool for the surface of an abrasive cloth and its production process |
US20050076577A1 (en) * | 2003-10-10 | 2005-04-14 | Hall Richard W.J. | Abrasive tools made with a self-avoiding abrasive grain array |
Cited By (50)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9463552B2 (en) | 1997-04-04 | 2016-10-11 | Chien-Min Sung | Superbrasvie tools containing uniformly leveled superabrasive particles and associated methods |
US9409280B2 (en) | 1997-04-04 | 2016-08-09 | Chien-Min Sung | Brazed diamond tools and methods for making the same |
US9238207B2 (en) | 1997-04-04 | 2016-01-19 | Chien-Min Sung | Brazed diamond tools and methods for making the same |
US9199357B2 (en) | 1997-04-04 | 2015-12-01 | Chien-Min Sung | Brazed diamond tools and methods for making the same |
US9221154B2 (en) | 1997-04-04 | 2015-12-29 | Chien-Min Sung | Diamond tools and methods for making the same |
US9868100B2 (en) | 1997-04-04 | 2018-01-16 | Chien-Min Sung | Brazed diamond tools and methods for making the same |
US7762872B2 (en) | 2004-08-24 | 2010-07-27 | Chien-Min Sung | Superhard cutters and associated methods |
US9067301B2 (en) | 2005-05-16 | 2015-06-30 | Chien-Min Sung | CMP pad dressers with hybridized abrasive surface and related methods |
US9724802B2 (en) | 2005-05-16 | 2017-08-08 | Chien-Min Sung | CMP pad dressers having leveled tips and associated methods |
US7901272B2 (en) | 2005-09-09 | 2011-03-08 | Chien-Min Sung | Methods of bonding superabrasive particles in an organic matrix |
US20100221990A1 (en) * | 2005-09-09 | 2010-09-02 | Chien-Min Sung | Methods of Bonding Superabrasive Particles in an Organic Matrix |
US20070060026A1 (en) * | 2005-09-09 | 2007-03-15 | Chien-Min Sung | Methods of bonding superabrasive particles in an organic matrix |
US20100139174A1 (en) * | 2005-09-09 | 2010-06-10 | Chien-Min Sung | Methods of bonding superabrasive particles in an organic matrix |
US7690971B2 (en) | 2005-09-09 | 2010-04-06 | Chien-Min Sung | Methods of bonding superabrasive particles in an organic matrix |
US8414362B2 (en) | 2005-09-09 | 2013-04-09 | Chien-Min Sung | Methods of bonding superabrasive particles in an organic matrix |
US9902040B2 (en) | 2005-09-09 | 2018-02-27 | Chien-Min Sung | Methods of bonding superabrasive particles in an organic matrix |
US8656901B2 (en) * | 2006-02-28 | 2014-02-25 | Ehwa Diamond Industrial Co., Ltd. | Cutting tip of frame saw and frame saw with the cutting tip |
US20090229592A1 (en) * | 2006-02-28 | 2009-09-17 | Ehwa Diamond Industrial Co., Ltd. | Cutting tip of frame saw and frame saw with the cutting tip |
US20100186887A1 (en) * | 2006-07-26 | 2010-07-29 | Kinik Company | Dies for manufaturing diamond discs |
US8387942B2 (en) * | 2006-07-26 | 2013-03-05 | Kinik Company | Dies for manufacturing diamond discs |
US20120060426A1 (en) * | 2006-09-22 | 2012-03-15 | Saint-Gobain Abrasifs | Conditioning Tools and Techniques for Chemical Mechanical Planarization |
US8622787B2 (en) | 2006-11-16 | 2014-01-07 | Chien-Min Sung | CMP pad dressers with hybridized abrasive surface and related methods |
US8398466B2 (en) | 2006-11-16 | 2013-03-19 | Chien-Min Sung | CMP pad conditioners with mosaic abrasive segments and associated methods |
US8393934B2 (en) | 2006-11-16 | 2013-03-12 | Chien-Min Sung | CMP pad dressers with hybridized abrasive surface and related methods |
US8657652B2 (en) | 2007-08-23 | 2014-02-25 | Saint-Gobain Abrasives, Inc. | Optimized CMP conditioner design for next generation oxide/metal CMP |
US8393938B2 (en) | 2007-11-13 | 2013-03-12 | Chien-Min Sung | CMP pad dressers |
US9011563B2 (en) | 2007-12-06 | 2015-04-21 | Chien-Min Sung | Methods for orienting superabrasive particles on a surface and associated tools |
US20100022174A1 (en) * | 2008-07-28 | 2010-01-28 | Kinik Company | Grinding tool and method for fabricating the same |
US8342910B2 (en) | 2009-03-24 | 2013-01-01 | Saint-Gobain Abrasives, Inc. | Abrasive tool for use as a chemical mechanical planarization pad conditioner |
US9022840B2 (en) | 2009-03-24 | 2015-05-05 | Saint-Gobain Abrasives, Inc. | Abrasive tool for use as a chemical mechanical planarization pad conditioner |
US8905823B2 (en) | 2009-06-02 | 2014-12-09 | Saint-Gobain Abrasives, Inc. | Corrosion-resistant CMP conditioning tools and methods for making and using same |
US8951099B2 (en) | 2009-09-01 | 2015-02-10 | Saint-Gobain Abrasives, Inc. | Chemical mechanical polishing conditioner |
US9475169B2 (en) | 2009-09-29 | 2016-10-25 | Chien-Min Sung | System for evaluating and/or improving performance of a CMP pad dresser |
US8777699B2 (en) | 2010-09-21 | 2014-07-15 | Ritedia Corporation | Superabrasive tools having substantially leveled particle tips and associated methods |
US8974270B2 (en) | 2011-05-23 | 2015-03-10 | Chien-Min Sung | CMP pad dresser having leveled tips and associated methods |
US9138862B2 (en) | 2011-05-23 | 2015-09-22 | Chien-Min Sung | CMP pad dresser having leveled tips and associated methods |
US20180318983A1 (en) * | 2015-06-19 | 2018-11-08 | 3M Innovative Properties Company | Systems and methods for making abrasive articles |
CN107820455A (en) * | 2015-06-19 | 2018-03-20 | 3M创新有限公司 | System and method for manufacturing abrasive product |
US10773361B2 (en) * | 2015-06-19 | 2020-09-15 | 3M Innovative Properties Company | Systems and methods for making abrasive articles |
WO2016205267A1 (en) * | 2015-06-19 | 2016-12-22 | 3M Innovative Properties Company | Systems and methods for making abrasive articles |
US10919126B2 (en) * | 2015-07-08 | 2021-02-16 | 3M Innovative Properties Company | Systems and methods for making abrasive articles |
CN107912026A (en) * | 2015-07-08 | 2018-04-13 | 3M创新有限公司 | System and method for manufacturing abrasive product |
WO2017007703A1 (en) * | 2015-07-08 | 2017-01-12 | 3M Innovative Properties Company | Systems and methods for making abrasive articles |
CN110312594A (en) * | 2016-12-21 | 2019-10-08 | 3M创新有限公司 | The system and method for being used to prepare abrasive product |
CN110312594B (en) * | 2016-12-21 | 2021-09-21 | 3M创新有限公司 | System and method for making abrasive articles |
CN107336148A (en) * | 2017-08-01 | 2017-11-10 | 华侨大学 | A kind of quick method for preparing abrasive particle pattern distribution mill |
CN107336150A (en) * | 2017-08-01 | 2017-11-10 | 华侨大学 | A kind of method that deposition prepares abrasive particle pattern distribution mill |
CN110509195A (en) * | 2019-07-15 | 2019-11-29 | 郑州磨料磨具磨削研究所有限公司 | A kind of resin abrasive tools and preparation method thereof |
CN113043178A (en) * | 2021-03-17 | 2021-06-29 | 江苏韦尔博新材料科技有限公司 | Brazing diamond grinding and polishing sheet and preparation process thereof |
CN114248209A (en) * | 2021-12-24 | 2022-03-29 | 江苏韦尔博新材料科技有限公司 | Diamond-solder composite belt and preparation process of brazed diamond tool based on same |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20060254154A1 (en) | Abrasive tool and method of making the same | |
US6755720B1 (en) | Vitrified bond tool and method of manufacturing the same | |
CN1867428B (en) | Abrasive tools made with a self-avoiding abrasive grain array | |
CN203380772U (en) | Chemical mechanical polishing dresser | |
TWI655057B (en) | Chemical mechanical polishing pad dresser | |
TWI511841B (en) | Stick-type chemical mechanical polishing conditioner and manufacturing method thereof | |
JP4456691B2 (en) | Conditioner manufacturing method | |
WO2012162430A2 (en) | Cmp pad dresser having leveled tips and associated methods | |
TWI546159B (en) | Chemical mechanical polishing conditioner capable of controlling polishing depth | |
TWI530361B (en) | Chemical mechanical polishing conditioner and associated methods | |
US20090325471A1 (en) | Diamond polishing disk and manufacturing method thereof | |
TWI568538B (en) | Chemical mechanical polishing conditioner and manufacturing method thereof | |
US20180354095A1 (en) | Grinding Tool and Method of Fabricating the Same | |
US10183378B2 (en) | Grinding tool | |
TW201637782A (en) | Grinding wheel | |
US8387942B2 (en) | Dies for manufacturing diamond discs | |
CN105940484A (en) | Method for manufacturing pad conditioner and pad conditioner | |
JP5566922B2 (en) | Fixed abrasive wire and method for manufacturing the same | |
TWI602650B (en) | Retaining ring for chemical mechanical polishing | |
TW201538275A (en) | Chemical mechanical polishing conditioner with planarization | |
KR102229135B1 (en) | CMP pad conditioner with individually attached tips and method for producing the same | |
TWI286097B (en) | Polishing tool and method for making the same | |
KR100615707B1 (en) | Manufacturing method for grinding and cutting tool using metal brazing | |
KR100688862B1 (en) | Diamond tool manufacturing method and diamond tool made of the method | |
KR20140006277A (en) | Cmp pad conditioner and its manufacturing method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: KINIK COMPANY, TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HUANG, WEI;YANG, MING-TA;LIN, PING-HAN;REEL/FRAME:016563/0715 Effective date: 20050322 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |