US20030190815A1 - Apparatus for etching glass substrate - Google Patents
Apparatus for etching glass substrate Download PDFInfo
- Publication number
- US20030190815A1 US20030190815A1 US09/883,272 US88327201A US2003190815A1 US 20030190815 A1 US20030190815 A1 US 20030190815A1 US 88327201 A US88327201 A US 88327201A US 2003190815 A1 US2003190815 A1 US 2003190815A1
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- United States
- Prior art keywords
- bath
- etchant
- glass substrate
- porous
- porous panel
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67063—Apparatus for fluid treatment for etching
- H01L21/67075—Apparatus for fluid treatment for etching for wet etching
- H01L21/67086—Apparatus for fluid treatment for etching for wet etching with the semiconductor substrates being dipped in baths or vessels
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67063—Apparatus for fluid treatment for etching
- H01L21/67075—Apparatus for fluid treatment for etching for wet etching
- H01L21/6708—Apparatus for fluid treatment for etching for wet etching using mainly spraying means, e.g. nozzles
Definitions
- the present invention relates to an etching apparatus, and more particularly, to an apparatus for etching glass substrate uniformly.
- CRT cathode ray tube
- display devices applicable to television or personal computers, for example, have large size screens. Since a luminous material-coated screen should be spaced apart a predetermined distance from an electron gun, there is a problem that the total volume of the display device becomes large. Thus, such CRTs cannot be applied to small size and low power consumption electronics such as a wall-mounted television, portable television, and notebook computers.
- the substrate has to be thinner.
- the glass processing is, however, very difficult technically because the processed thin glass can be easily damaged and the surface becomes rough after the process if it is not properly done.
- the most useful method of reducing the weight of the glass substrate is to etch the surface of the glass substrate by soaking the substrate in a container having an etchant.
- the substrate is often not etched uniformly because of the non-uniform surface of the substrate.
- the impurities generated during the etching process are attached to the surface of the substrate, so that the surface becomes even rougher.
- the substrate is set up in the container having the etchant and then bubbles are generated to the surface of the substrate through a porous plate to remove the impurities attached on the surface of the substrate and a fresh etchant is applied to the surface of the substrate.
- a porous plate to remove the impurities attached on the surface of the substrate
- a fresh etchant is applied to the surface of the substrate.
- the present invention is directed to an apparatus for etching glass substrate that substantially obviates one or more of the problems due to limitations and disadvantages of the related art.
- An object of the present invention is to provide an apparatus for etching glass substrate having a thin thickness and uniform surface.
- the apparatus for etching the glass substrate includes an outer bath, an inner bath containing etchant within the outer bath, at least one porous panel having a plurality of jet holes mounted in the inner bath in a line to jet etchant against the glass substrate, a container for storing the etchant, and a pump connected to the container and the porous panel to supply the etchant in the container to the porous panel.
- the glass substrate is set up beside the porous panel.
- the apparatus for etching a glass substrate includes a first bath containing an etchant, at least one porous panel having a plurality of jet holes in the first bath, the porous panel containing the etchant to jet the etchant against the glass substrate, a container storing the etchant, and a pump supplying the etchant from the container to the porous panel, the pump being connected to the container and the porous panel.
- the apparatus for etching a glass substrate includes a first bath containing an etchant, at least a pair of porous panels having a plurality of jet holes in the first bath, the porous panels moving in a longitudinal direction of the glass substrate and jetting the etchant in the porous panel against the glass substrate, a container storing the etchant, and a pump supplying the etchant in the container to the porous panel, the pump being connected to the container and the porous panel.
- the apparatus for etching a glass substrate includes a bath containing an etchant, and at least one porous panel mounted in the bath, the porous panel having a plurality of jet holes jetting the etchant against the glass substrate.
- the apparatus for etching a glass substrate includes a bath containing an etchant, and a plurality of porous panels in the bath, the porous panels having a plurality of jet holes jetting the etchant against the glass substrate.
- FIG. 1 is a schematic view of an etching apparatus according to a first embodiment of the present invention
- FIG. 2 illustrates a porous panel of the first embodiment
- FIG. 3 is a schematic view to explain an operation of the etching apparatus of the first embodiment
- FIG. 4 is a schematic view showing an operation of an etching apparatus according to a second embodiment of the present invention.
- FIG. 5 is a schematic view showing an operation of an etching apparatus according a third embodiment of the present invention.
- an inner bath 13 is mounted within an outer bath 11 .
- a height of the inner bath 13 containing an etchant is lower than that of the outer bath 11 , so that the etchant passing over the inner bath 13 is collected in the bottom of the outer bath 11 .
- an establishment stand 18 is mounted in the inner bath 13 .
- a plurality of porous panels 15 are attached on the establishment stand 18 and the glass substrates are positioned between the porous panels 15 .
- a plurality of jet holes 16 are formed on the porous panel 15 in the vertical and horizontal directions to jet the etchant in the porous panels 15 into glass substrates 30 (shown in FIG. 3). Between the porous panels 15 on the establishment stand 18 , a pair of projections 19 to hold the glass substrates are formed.
- the outer bath 11 is connected to a filter 22 and a pipe 23 .
- the etchant passed over the inner bath 13 is thus collected in the bottom of the outer bath 11 and flows into the filter 22 through the pipe 23 for filtering the collected etchant.
- the filtered etchant flows into the storage container 20 through the pipe 29 .
- a pump 24 is connected to the storage container 20 to supply the etchant to the inner space of the establishment stand 18 through the supplying pipe 25 .
- a porous plate 17 having a plurality of holes is mounted on the lower portion of the inner bath 13 and generates the bubbles by the gas supplied from a gas tank 26 through a gas supplying pipe 27 .
- the bubbles flow up along the glass substrates 30 to remove the impurities generated and attached on the surface of the substrates during the etching process.
- the glass substrates 30 are fixed by at least a pair of the establishment projections 19 formed on the establishment stand 18 and arranged between the porous panels 15 .
- the etchant is jetting into the glass substrate 30 through the jet holes 16 by the pressure of the pump 24 .
- the inner spaces of the porous panels 15 and the establishment stand 18 containing the etchant are interconnected with each other.
- the inner bath 13 also contains the etchant.
- the etchant is thus jetting into the both sides of the glass substrates 30 through the jet holes 16 .
- the both sides of the glass substrates 30 are etched.
- the porous panels 15 having a larger area than that of the glass substrates 30 are used for uniform etching of the total area of the substrate 30 .
- the outside of the porous panels 15 mounted on the outermost of the establishment stand 18 does not have the jet holes 16 .
- the etchant in the inner bath 13 etches the glass substrates 30 , the most effective etching is caused by the fresh etchant jetted through the jet holes 16 (i.e., the clean etchant filtered by the filter 22 ).
- a plurality of the jet holes 16 are formed in the porous panels 15 in the vertical and horizontal directions at an appropriate interval to jet the etchant into the glass substrates 30 uniformly.
- the etchant in the inner bath 13 includes impurities generated from the reaction between the substrate 30 and the etchant.
- the etchant flows over the inner bath 13 and is then collected in the bottom of the outer bath 11 .
- the collected etchant flows into the filter 22 through the pipe 23 to remove the impurities from the etchant and then stored in the storage container 20 through the pipe 29 .
- the bubbles generated from the porous plate 17 remove the impurities attached on the surface of the glass substrates 30 by passing over the surface of the glass substrates 30 .
- the porous panels 15 are mounted on the establishment stand 18 and the etchant stored in the storage container 20 is supplied to the porous panels 15 through the established stand 18 in the first embodiment, the pump 24 can be directly connected to a plurality of the porous panels 15 to supply the etchant. Further, the etchant including the impurities can be filtered by a separative process and then stored in the storage container 20 . In addition, it is possible to have only one porous panel mounted on the establishment stand and one glass substrate positioned next to the porous panel. Thus, only one side of the substrate facing to the porous panel may be etched.
- FIG. 4 is a schematic view of a second embodiment of the present invention.
- FIG. 4 illustrates only a glass substrate 230 and porous panels 215 .
- the other elements of the second embodiment are the same as the first embodiment except for the shape of the porous panel 215 and the operation of the apparatus. Accordingly, the general description of the structure and operation is omitted and only distinguished characteristics of the second embodiment is described as follows.
- the porous panels 215 have a plurality of jet holes 216 in the vertical and horizontal directions.
- a width of the porous panels 215 of the second embodiment is smaller than that of the first embodiment.
- the width of the porous panels 215 is smaller than that of the glass substrate 230 positioned between the porous panels 215 .
- the number of the jet holes 16 the second embodiment is much smaller than that of the first embodiment.
- a motor (not shown in FIG. 4) is connected to the porous panels 215 , and the panels 215 move back and forth in the longitudinal direction of the glass substrate 230 .
- the pump 24 (shown in FIG. 3) is operated to supply the etchant, that is, the pump 24 applies the pressure into the etchant in the porous panels 15 , the motor is simultaneously operated so that the porous panels 15 move back and forth in the longitudinal direction of the glass substrate 230 . While the porous panels 215 are moving, the porous panels 215 are jetting the etchant to etch the glass substrate 230 through the jet holes 216 . A plurality of the porous panels 215 arranged in lines are simultaneously moved by the motor.
- FIG. 5 is a schematic view of a third embodiment of the present invention.
- a plurality of narrow porous panels 315 are formed in the longitudinal direction of the glass substrate 330 .
- the narrow porous panels 315 are mounted on the establishment stand 18 (shown in FIG. 3) and moved simultaneously by a motor (not shown in FIG. 5).
- the etchant is supplied to the porous panels 315 from the storage container 20 (shown in FIG. 3) by the pump 24 , the porous panels 315 , moving back and forth in the longitudinal direction of the glass substrate 30 , are jetting the etchant to etch the glass substrate 330 through the jet holes 316 .
- the etching speed is much improved.
- the panels may be fixed and the substrate 330 may be moved back and forth in the longitudinal direction of the substrate.
Abstract
Description
- This application claims the benefit of Korean application No. 1996-23779 filed on Jun. 26, 1996, which is hereby incorporated by reference.
- 1. Field of the Invention
- The present invention relates to an etching apparatus, and more particularly, to an apparatus for etching glass substrate uniformly.
- 2. Discussion of the Related Art
- CRT (cathode ray tube) display devices applicable to television or personal computers, for example, have large size screens. Since a luminous material-coated screen should be spaced apart a predetermined distance from an electron gun, there is a problem that the total volume of the display device becomes large. Thus, such CRTs cannot be applied to small size and low power consumption electronics such as a wall-mounted television, portable television, and notebook computers.
- For small size and low power consumption, flat panel display devices such as LCD(Liquid Crystal Display), PDP(Plasma Display Panel), ELD(Electroluminescent Display), and VFD(Vacuum Fluorescent Display) have been introduced. In these flat panel display devices, the LCD has been most actively researched recently because of good picture quality and low power consumption in spite of various disadvantages. Although portable televisions and notebook computers having the LCD have been marketed, there are various problems yet to be solved. Because televisions and computers have become portable electronics, the reduction of the size and weight is one of the goals in the LCD research.
- There are various methods to reduce the size and weight of the LCD. It is, however, difficult to reduce the number of the essential elements of the LCD. In addition, the weight and size of the essential elements are so small that the weight and size of the essential elements hardly can be reduced further. Fortunately, a glass substrate, which is one of the most basic element of the LCD, may be reduced in weight. Specially, the weight reduction of the glass substrate is very important because it makes up a large portion of the total weight of the LCD.
- To reduce the weight of the glass substrate, the substrate has to be thinner. The glass processing is, however, very difficult technically because the processed thin glass can be easily damaged and the surface becomes rough after the process if it is not properly done.
- Conventionally, the most useful method of reducing the weight of the glass substrate is to etch the surface of the glass substrate by soaking the substrate in a container having an etchant. In this method, however, the substrate is often not etched uniformly because of the non-uniform surface of the substrate. Further, the impurities generated during the etching process are attached to the surface of the substrate, so that the surface becomes even rougher.
- To solve the aforementioned problems, the substrate is set up in the container having the etchant and then bubbles are generated to the surface of the substrate through a porous plate to remove the impurities attached on the surface of the substrate and a fresh etchant is applied to the surface of the substrate. In this method, however, since the bubbles having different sizes are applied on the upper portion and lower portion of the substrate, there is a thickness difference between the upper portion and lower portion. As a result, the substrate is still easily damaged even by light force during the LCD process because of the non-uniformity of the substrate. Further, the substrate has to be soaked for a long period, for example, scores of minutes, to etch the substrate sufficiently. Thus, the processing cost is increased in this method.
- Accordingly, the present invention is directed to an apparatus for etching glass substrate that substantially obviates one or more of the problems due to limitations and disadvantages of the related art.
- An object of the present invention is to provide an apparatus for etching glass substrate having a thin thickness and uniform surface.
- Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
- In order to achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, the apparatus for etching the glass substrate includes an outer bath, an inner bath containing etchant within the outer bath, at least one porous panel having a plurality of jet holes mounted in the inner bath in a line to jet etchant against the glass substrate, a container for storing the etchant, and a pump connected to the container and the porous panel to supply the etchant in the container to the porous panel. The glass substrate is set up beside the porous panel.
- In another aspect, the apparatus for etching a glass substrate includes a first bath containing an etchant, at least one porous panel having a plurality of jet holes in the first bath, the porous panel containing the etchant to jet the etchant against the glass substrate, a container storing the etchant, and a pump supplying the etchant from the container to the porous panel, the pump being connected to the container and the porous panel.
- In another aspect, the apparatus for etching a glass substrate includes a first bath containing an etchant, at least a pair of porous panels having a plurality of jet holes in the first bath, the porous panels moving in a longitudinal direction of the glass substrate and jetting the etchant in the porous panel against the glass substrate, a container storing the etchant, and a pump supplying the etchant in the container to the porous panel, the pump being connected to the container and the porous panel.
- In another aspect, the apparatus for etching a glass substrate includes a bath containing an etchant, and at least one porous panel mounted in the bath, the porous panel having a plurality of jet holes jetting the etchant against the glass substrate.
- In a further aspect, the apparatus for etching a glass substrate includes a bath containing an etchant, and a plurality of porous panels in the bath, the porous panels having a plurality of jet holes jetting the etchant against the glass substrate.
- It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
- The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:
- FIG. 1 is a schematic view of an etching apparatus according to a first embodiment of the present invention;
- FIG. 2 illustrates a porous panel of the first embodiment;
- FIG. 3 is a schematic view to explain an operation of the etching apparatus of the first embodiment;
- FIG. 4 is a schematic view showing an operation of an etching apparatus according to a second embodiment of the present invention; and
- FIG. 5 is a schematic view showing an operation of an etching apparatus according a third embodiment of the present invention.
- Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.
- Referring to FIG. 1, an
inner bath 13 is mounted within anouter bath 11. A height of theinner bath 13 containing an etchant is lower than that of theouter bath 11, so that the etchant passing over theinner bath 13 is collected in the bottom of theouter bath 11. In theinner bath 13, anestablishment stand 18 is mounted. A plurality ofporous panels 15 are attached on the establishment stand 18 and the glass substrates are positioned between theporous panels 15. As shown in FIG. 2, a plurality ofjet holes 16 are formed on theporous panel 15 in the vertical and horizontal directions to jet the etchant in theporous panels 15 into glass substrates 30 (shown in FIG. 3). Between theporous panels 15 on the establishment stand 18, a pair ofprojections 19 to hold the glass substrates are formed. - The
outer bath 11 is connected to afilter 22 and apipe 23. The etchant passed over theinner bath 13 is thus collected in the bottom of theouter bath 11 and flows into thefilter 22 through thepipe 23 for filtering the collected etchant. The filtered etchant flows into thestorage container 20 through thepipe 29. Apump 24 is connected to thestorage container 20 to supply the etchant to the inner space of the establishment stand 18 through the supplyingpipe 25. - A
porous plate 17 having a plurality of holes is mounted on the lower portion of theinner bath 13 and generates the bubbles by the gas supplied from agas tank 26 through agas supplying pipe 27. The bubbles flow up along theglass substrates 30 to remove the impurities generated and attached on the surface of the substrates during the etching process. - As shown in FIG. 3, the
glass substrates 30 are fixed by at least a pair of theestablishment projections 19 formed on theestablishment stand 18 and arranged between theporous panels 15. When thepump 24 is operating, the etchant is jetting into theglass substrate 30 through thejet holes 16 by the pressure of thepump 24. The inner spaces of theporous panels 15 and the establishment stand 18 containing the etchant are interconnected with each other. Theinner bath 13 also contains the etchant. When the etchant in thestorage container 20 is supplied to the establishment stand 18 through theetchant supplying pipe 25 by the operation of thepump 24, the pressure of thepump 24 is transmitted to the etchant in theporous panels 15 connected to theestablishment stand 18. The etchant is thus jetting into the both sides of theglass substrates 30 through the jet holes 16. As a result, the both sides of theglass substrates 30 are etched. At that time, theporous panels 15 having a larger area than that of theglass substrates 30 are used for uniform etching of the total area of thesubstrate 30. Further, the outside of theporous panels 15 mounted on the outermost of the establishment stand 18 (not facing to the glass substrate) does not have the jet holes 16. Although the etchant in theinner bath 13 etches theglass substrates 30, the most effective etching is caused by the fresh etchant jetted through the jet holes 16 (i.e., the clean etchant filtered by the filter 22). A plurality of the jet holes 16 are formed in theporous panels 15 in the vertical and horizontal directions at an appropriate interval to jet the etchant into theglass substrates 30 uniformly. - During the etching process, the etchant in the
inner bath 13 includes impurities generated from the reaction between thesubstrate 30 and the etchant. After the etchant is continuously supplied to theinner bath 13 by thepump 24, the etchant flows over theinner bath 13 and is then collected in the bottom of theouter bath 11. The collected etchant flows into thefilter 22 through thepipe 23 to remove the impurities from the etchant and then stored in thestorage container 20 through thepipe 29. - The bubbles generated from the
porous plate 17 remove the impurities attached on the surface of theglass substrates 30 by passing over the surface of theglass substrates 30. - Although the
porous panels 15 are mounted on theestablishment stand 18 and the etchant stored in thestorage container 20 is supplied to theporous panels 15 through the establishedstand 18 in the first embodiment, thepump 24 can be directly connected to a plurality of theporous panels 15 to supply the etchant. Further, the etchant including the impurities can be filtered by a separative process and then stored in thestorage container 20. In addition, it is possible to have only one porous panel mounted on the establishment stand and one glass substrate positioned next to the porous panel. Thus, only one side of the substrate facing to the porous panel may be etched. - FIG. 4 is a schematic view of a second embodiment of the present invention. FIG. 4 illustrates only a
glass substrate 230 andporous panels 215. The other elements of the second embodiment are the same as the first embodiment except for the shape of theporous panel 215 and the operation of the apparatus. Accordingly, the general description of the structure and operation is omitted and only distinguished characteristics of the second embodiment is described as follows. - The
porous panels 215 have a plurality ofjet holes 216 in the vertical and horizontal directions. A width of theporous panels 215 of the second embodiment is smaller than that of the first embodiment. Thus, the width of theporous panels 215 is smaller than that of theglass substrate 230 positioned between theporous panels 215. Further, the number of the jet holes 16 the second embodiment is much smaller than that of the first embodiment. A motor (not shown in FIG. 4) is connected to theporous panels 215, and thepanels 215 move back and forth in the longitudinal direction of theglass substrate 230. - When the pump24 (shown in FIG. 3) is operated to supply the etchant, that is, the
pump 24 applies the pressure into the etchant in theporous panels 15, the motor is simultaneously operated so that theporous panels 15 move back and forth in the longitudinal direction of theglass substrate 230. While theporous panels 215 are moving, theporous panels 215 are jetting the etchant to etch theglass substrate 230 through the jet holes 216. A plurality of theporous panels 215 arranged in lines are simultaneously moved by the motor. - FIG. 5 is a schematic view of a third embodiment of the present invention. In this embodiment, a plurality of narrow
porous panels 315 are formed in the longitudinal direction of the glass substrate 330. The narrowporous panels 315 are mounted on the establishment stand 18 (shown in FIG. 3) and moved simultaneously by a motor (not shown in FIG. 5). When the etchant is supplied to theporous panels 315 from the storage container 20 (shown in FIG. 3) by thepump 24, theporous panels 315, moving back and forth in the longitudinal direction of theglass substrate 30, are jetting the etchant to etch the glass substrate 330 through the jet holes 316. Thus, the etching speed is much improved. - Alternatively, in the second and third embodiments, the panels may be fixed and the substrate330 may be moved back and forth in the longitudinal direction of the substrate.
- In the aforementioned etching apparatus, since a glass substrate is uniformly etched by an etchant jetted through the jet holes of the porous panels, a glass substrate is readily processed to have a thin thickness and flat surface.
- It will be apparent to those skilled in the art that various modifications and variations can be made in the apparatus for etching glass substrate of the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (30)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/883,272 US6630052B1 (en) | 1996-06-26 | 2001-06-19 | Apparatus for etching glass substrate |
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019960023779A KR0180850B1 (en) | 1996-06-26 | 1996-06-26 | Etching apparatus for glass plate |
KR23779/1996 | 1996-06-26 | ||
KR96/23779 | 1996-06-26 | ||
US08/883,501 US6071374A (en) | 1996-06-26 | 1997-06-26 | Apparatus for etching glass substrate |
US09/368,355 US6461470B2 (en) | 1996-06-26 | 1999-08-05 | Apparatus for etching glass substrate |
US09/645,331 US6281136B1 (en) | 1996-06-26 | 2000-08-25 | Apparatus for etching glass substrate |
US09/883,272 US6630052B1 (en) | 1996-06-26 | 2001-06-19 | Apparatus for etching glass substrate |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/645,331 Continuation US6281136B1 (en) | 1996-06-26 | 2000-08-25 | Apparatus for etching glass substrate |
Publications (2)
Publication Number | Publication Date |
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US6630052B1 US6630052B1 (en) | 2003-10-07 |
US20030190815A1 true US20030190815A1 (en) | 2003-10-09 |
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ID=28679008
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Application Number | Title | Priority Date | Filing Date |
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US09/883,272 Expired - Lifetime US6630052B1 (en) | 1996-06-26 | 2001-06-19 | Apparatus for etching glass substrate |
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US (1) | US6630052B1 (en) |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI397120B (en) * | 2006-04-27 | 2013-05-21 | Samsung Display Co Ltd | Apparatus and method for etching a substrate |
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US6630052B1 (en) | 2003-10-07 |
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