WO1999043761A1 - Composition abrasive de polissage d'un dispositif semiconducteur et procede de production d'un dispositif semiconducteur afferent - Google Patents
Composition abrasive de polissage d'un dispositif semiconducteur et procede de production d'un dispositif semiconducteur afferent Download PDFInfo
- Publication number
- WO1999043761A1 WO1999043761A1 PCT/JP1999/000844 JP9900844W WO9943761A1 WO 1999043761 A1 WO1999043761 A1 WO 1999043761A1 JP 9900844 W JP9900844 W JP 9900844W WO 9943761 A1 WO9943761 A1 WO 9943761A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polishing
- semiconductor device
- abrasive composition
- nitride film
- group
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/31051—Planarisation of the insulating layers
- H01L21/31053—Planarisation of the insulating layers involving a dielectric removal step
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/1454—Abrasive powders, suspensions and pastes for polishing
- C09K3/1463—Aqueous liquid suspensions
Definitions
- the present invention relates to an abrasive composition for polishing a semiconductor device, in particular, an abrasive composition used for performing element isolation of a semiconductor device by a shallow wrench eye isolation method, and an abrasive composition thereof.
- the present invention relates to a method for manufacturing a semiconductor device used.
- a silicon nitride film is formed on a silicon substrate, and then a shallow trench (Shallow Trench) is formed. After the oxide film is deposited, the silicon nitride film is used as a stopper by CMP technology to make it flattening. Shallow Trench Isolation method is used. It is attracting attention as a technology that supports high density.
- a silicon nitride film is disposed below the oxide film to be polished, and the silicon nitride film is used as a stopper for polishing.
- the polishing is finished uniformly with no shortage, and the polishing is finished with a predetermined allowance.
- Japanese Patent Application Laid-Open No. Hei 9-194823 discloses a method in which silicon nitride, gay carbide, and graphite are used as abrasive particles.
- An abrasive composition in which an acid such as gluconic acid is added to fine powder is described.
- the above abrasive composition contains an abrasive of high hardness, the polishing rate is certainly high, but many scratches are generated on the polished surface, which leads to a decrease in performance as a semiconductor device. There is a problem.
- An object of the present invention is to provide an abrasive composition for polishing a semiconductor device, which can solve the above problems and problems.
- Another object of the present invention is to provide a method of manufacturing a semiconductor device which has solved the above-mentioned problems. Disclosure of the invention
- the present invention provides (1) an abrasive composition for use in a shear wrench isolation.
- the main component is water, the oxidation cell re um fine powder, and, - C00H group, - C00M x groups (Myukai also is properly atoms capable of forming a salt by substituting the ⁇ atom functional group), one S0 3 H group and one S0 3 M Y group (M gamma atomic be properly functional group capable of forming a salt by substituting the H atom) of water-soluble organic compound having one also least for the one or more An abrasive composition for polishing a semiconductor device characterized by containing the same was found.
- the concentration of the cerium oxide in the abrasive composition is 0.1 to 10 wt.%
- the amount of the water-soluble organic compound added to the cerium oxide is (3)
- the silicon nitride film and the silicon oxide film formed separately on the silicon substrate by the CVD method are polished independently and under the same conditions, respectively.
- the semiconductor device of the present invention wherein the ratio of the polishing rate of the latter to that of the former is 10 or more
- the flat capo Li Sing the main component is water, the oxidation cell re um fine powder, in parallel Beauty, - C00H group, also is properly one C00M x groups (Micromax chi can form salts by replacing the ⁇ atom atom functional group), - S0 3 H group and one S0 3 M Y group (MY water-soluble organic compound also atom capable of forming a salt by substituting the H atoms properly has one also less functional groups) to There is also provided a method for manufacturing a semiconductor device using an abrasive composition for polishing a semiconductor device containing one or more kinds.
- 1 to 4 are cross-sectional views of a semiconductor device in the order of steps for explaining a method of forming a shallow trench isolation.
- the polishing composition for polishing a semiconductor device according to the present invention will be described.
- high purity cerium oxide is preferable, and 99 wt.% Or more. And more preferably 99.9 wt.% Or more. If the purity is low, it is difficult to remove impurity elements that have an adverse effect on semiconductor characteristics from the surface of the semiconductor device even if the polished semiconductor device is washed, which increases the number of defective products and deteriorates the yield, which is not preferable. .
- the average particle size of the cerium oxide fine powder is preferably from 0.01 to 1.0 zm, more preferably from 0.1 to 0.5 m. If the thickness is less than 0.01 ⁇ m, the polishing rate of an oxide film, and in many cases, a silicon dioxide film is reduced. On the other hand, if it exceeds 1. O z m, it is not preferable because minute scratches are easily formed on the polished surface.
- the primary particle size of cerium oxide is preferably between 0.005 and 0.5; m, more preferably between 0.02 and 0.2 m. If it is less than 0.005 m, the polishing rate of the oxide film becomes extremely low, and a large selectivity cannot be obtained. If it exceeds 0.5 m, minute scratches are liable to be formed on the polished surface, which is not preferable.
- the concentration of cerium oxide (fine powder) in the abrasive composition of the present invention depends on polishing conditions such as processing pressure during polishing, but is preferably 0.1 to 10%, and 0.3 to 5%. wt.% is more preferred. If the amount is less than 0.1 wt%, the polishing rate of the oxide film is reduced. If the amount exceeds 10 wt%, the effect of increasing the amount is improved, that is, the improvement of the polishing rate of the oxide film is reduced, and the economy is reduced. Not good and not good.
- the present invention is not particularly limited as long as it is a water-soluble organic compound having at least one of the above groups. This water-soluble organic compound may be used alone or in combination of two or more.
- preferred correct are poly accession acrylic acid ( ⁇ eCH 2 CHC00H - i, molecular weight 500 to 10,000), polymethacrylonitrile acrylic acid CH 2 CCH 3 C00H " ⁇ , molecular weight 500 to 10,000), their Anmoniumu Salt, formalin naphthalene sulfonate condensate (following formula:
- the amount of the water-soluble organic compound to be added depends on the type of the compound, the concentration of the cerium oxide fine powder in the composition of the present invention, the PH value of the composition, the polishing pressure during polishing, and other polishing conditions.
- the weight ratio is preferably 0.001 to 20 weight ratio, more preferably 0.005 to 10 weight ratio, and even more preferably 0.005 to 5 weight ratio, based on cerium oxide. If the ratio is less than 0.1% by weight, the amount of the water-soluble organic compound adsorbed on the surface of the silicon nitride film with respect to the abrasive grains acting during the polishing process is small, and the adsorbed layer is poor.
- the pH may affect the polishing rate of both the silicon dioxide film and the silicon nitride film, it can be adjusted as appropriate. If you want to lower the pH, use inorganic acids such as nitric acid, hydrochloric acid, sulfuric acid, etc., linoleic acid, lactic acid, tartaric acid, gluconic acid, citric acid monohydrate, succinic acid, adipic acid, fumaric acid Organic acids such as acetic acid and acidic amino acids such as aspartic acid and glutamic acid can be used.
- inorganic acids such as nitric acid, hydrochloric acid, sulfuric acid, etc., linoleic acid, lactic acid, tartaric acid, gluconic acid, citric acid monohydrate, succinic acid, adipic acid, fumaric acid
- Organic acids such as acetic acid and acidic amino acids such as aspartic acid and glutamic acid can be used.
- ammonia amines such as ethanol, glycine, 4-aminobutyric acid, 6-aminohexanoic acid, 12-amino Neutral or basic amino acids such as minolauric acid, arginine, and glycylglycin can be used.
- pH value 4 and above In some cases it is preferred, but may be less than 4.
- the abrasive composition of the present invention may contain an abrasive other than cerium oxide, a viscosity modifier, a buffer, a surfactant, a chelating agent, etc., which are generally added to the abrasive composition. May be mixed.
- the abrasive composition of the present invention is characterized by high selectivity of the polishing rate of the oxidized silicon and the oxidized silicon, and at least 10, more preferably 30 or more, and even 50 or more. It is possible that this is the case. In addition, it has the feature that scratches on the polished surface are drastically reduced.
- the surface of a semiconductor substrate 1 made of silicon or the like is thinly oxidized to form a silicon oxide film 2, and then a silicon nitride film 3 is deposited to a thickness of, for example, 200 nm by CVD or the like.
- a silicon nitride film 3 is deposited to a thickness of, for example, 200 nm by CVD or the like.
- an opening 3 having a width of, for example, 500 to 5000 nm is formed at a predetermined position where a trench of the gay nitride film 2 is to be formed by a photolithography method using a photo resist.
- the semiconductor substrate 1 is selectively etched using the gay nitride film 3 provided with the opening as a mask to form a shear wrench 4 having a depth of, for example, 500 nm.
- the trench 4 can be completely filled with the silicon oxide 5. Yes ( Figure 2).
- the surface of the gay oxide film 5 is gradually polished as a flat surface despite having a concave portion on the wrench 4. . If the polishing is continued in this manner, the polished surface reaches the surface of the GaN film 3, but by then the surface is completely flattened, and the concave portion on the trench 4 disappears. Policing The process is terminated when the surface of the gay nitride film 3 is exposed. In this way, as shown in FIG. 3, a shear wrench isolation 5 'is formed.
- the silicon nitride film 3 may be used as it is as an insulating film on the semiconductor surface, but is usually removed as shown in FIG.
- the polishing is surely performed at the position of the silicon nitride film.
- the ratio of the polishing rates of the silicon oxide and the silicon nitride, that is, the selectivity is high.
- the characteristics of the semiconductor device may be degraded.
- the abrasive composition described earlier in the present invention has been developed as the most suitable for the purpose of performing this planarization polishing.
- the above-mentioned selectivity can be at least 10, preferably 50 or more, and 60 or more. Therefore, it is possible to perform flattening polishing with high controllability. It is possible and it is also possible to eliminate scratches on the polishing plane.
- the polishing using the abrasive composition of the present invention can be performed by a known polishing method or a mechanochemical polishing method.
- the polishing performance of the abrasive slurry on the silicon dioxide film and the GaN film was evaluated by the following method.
- Material to be polished 1 6 ⁇ ⁇ , silicon dioxide film formed by CVD method on 625 / m thick silicon wafer (thickness: about 1 / m) 2 6 " ⁇ , 625 ⁇ m thick silicon ⁇ ⁇ Ga nitride film (thickness: about 0.5 ⁇ m) formed by CVD on the pad Pad: Polishing pad for two-layer type semiconductor device (IC1000 / Suba400, manufactured by Mouth Dale Nitta Co., Ltd.)
- Polishing machine Single-side polishing machine for polishing semiconductor devices, manufactured by Speedfam Co., Ltd., model number SH-24, surface plate diameter 610mm
- Polishing speed Optical interference type film thickness measuring device
- the polishing rate of the gay silicon dioxide film was as high as 5050 A Zmin, and the polishing rate of the gay nitride film was extremely high at 77 persons / min. It was a low value. Therefore, the selectivity is as large as 66.
- a slurry was prepared under the same conditions as in Example 1 except that the concentration of cerium oxide and the concentration of ammonium polyacrylate were changed, and the same polishing performance as in Example 1 was evaluated. Table 1 shows the results, including Example 1.
- Example 2 Using the same ceramic oxide as in Example 1, a slurry was produced in which the type of water-soluble organic compound was changed. The concentration of cerium oxide is 1 wt.%, And the concentration of water-soluble organic compounds is 1 wt.%, So the weight ratio is 1. The pH of the abrasive slurry was adjusted to about 7 by adding ammonia. The polishing performance was evaluated in the same manner as in Example 1, and the results are shown in Table 2.
- Example 3 Using the same cerium oxide as in Example 1, a slurry was added to which various water-soluble organic compounds were added.
- the concentration of cerium oxide is 1 wt.%
- the concentration of water-soluble organic compounds is 0.1 lwt.%, So the weight ratio is 0.1.
- the polishing performance was evaluated in the same manner as in Example 1, and the results are shown in Table 3.
- a slurry of 10 wt.% was prepared by diluting a silica slurry (SC-1, 30 wt.%) Manufactured by Cabot Corporation, and the same polishing performance as in Example 1 was evaluated. Table 3 shows the results.
- Example 2 The same cerium oxide as in Example 1 was diluted to produce a 1 wt.% Slurry. No water-soluble organic compounds were added. Polishing as in Example 1 The test was performed and the results are shown in Table 3.
- the polishing composition for polishing a semiconductor device of the present invention has a high polishing rate with respect to a silicon dioxide as an oxide film, a high selectivity ratio with respect to a polishing rate with a gay nitride film, and has few scratches on a polished surface. Therefore, it is suitably used for polishing a semiconductor device used for polishing an oxide film using a nitride film of silicon nitride as a stopper film, in many cases, a silicon dioxide film.
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT99906467T ATE266071T1 (de) | 1998-02-24 | 1999-02-24 | Schleifmittelzusammensetzung zum polieren eines halbleiterbauteils und herstellung des halbleiterbauteils mit derselben |
JP2000533504A JP3672493B2 (ja) | 1998-02-24 | 1999-02-24 | 半導体装置研磨用研磨材組成物及びそれを用いた半導体装置の製造方法 |
EP99906467A EP1061111B1 (en) | 1998-02-24 | 1999-02-24 | Abrasive composition for polishing semiconductor device and process for producing semiconductor device with the same |
DE69917010T DE69917010T2 (de) | 1998-02-24 | 1999-02-24 | Schleifmittelzusammensetzung zum polieren eines halbleiterbauteils und herstellung des halbleiterbauteils mit derselben |
US09/622,939 US6436835B1 (en) | 1998-02-24 | 1999-02-24 | Composition for polishing a semiconductor device and process for manufacturing a semiconductor device using the same |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4228898 | 1998-02-24 | ||
JP10/42288 | 1998-02-24 | ||
US8176998P | 1998-04-15 | 1998-04-15 | |
US60/081,769 | 1998-04-15 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/953,127 Division US6410444B1 (en) | 1998-02-24 | 2001-09-17 | Composition for polishing a semiconductor device and process for manufacturing a semiconductor device using the same |
Publications (1)
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WO1999043761A1 true WO1999043761A1 (fr) | 1999-09-02 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP1999/000844 WO1999043761A1 (fr) | 1998-02-24 | 1999-02-24 | Composition abrasive de polissage d'un dispositif semiconducteur et procede de production d'un dispositif semiconducteur afferent |
Country Status (9)
Country | Link |
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US (2) | US6436835B1 (ja) |
EP (1) | EP1061111B1 (ja) |
JP (1) | JP3672493B2 (ja) |
KR (1) | KR100583842B1 (ja) |
AT (1) | ATE266071T1 (ja) |
DE (1) | DE69917010T2 (ja) |
ES (1) | ES2216490T3 (ja) |
TW (1) | TW510917B (ja) |
WO (1) | WO1999043761A1 (ja) |
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JP2009227893A (ja) * | 2008-03-25 | 2009-10-08 | Mitsui Mining & Smelting Co Ltd | セリウム系研摩材スラリー |
US8546261B2 (en) | 2010-02-25 | 2013-10-01 | Samsung Electronics Co., Ltd. | Slurry for polishing and planarization method of insulating layer using the same |
JP2015511258A (ja) * | 2012-02-10 | 2015-04-16 | ビーエーエスエフ ソシエタス・ヨーロピアBasf Se | タンパク質を含有する化学機械研磨(cmp)組成物 |
JP2017190450A (ja) * | 2016-03-31 | 2017-10-19 | バーサム マテリアルズ ユーエス,リミティド ライアビリティ カンパニー | 複合粒子、その精製方法及び使用 |
CN107267118A (zh) * | 2016-03-31 | 2017-10-20 | 弗萨姆材料美国有限责任公司 | 复合颗粒、其精制方法及用途 |
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WO2022113775A1 (ja) * | 2020-11-27 | 2022-06-02 | 花王株式会社 | 酸化珪素膜用研磨液組成物 |
Also Published As
Publication number | Publication date |
---|---|
KR20010041248A (ko) | 2001-05-15 |
ES2216490T3 (es) | 2004-10-16 |
ATE266071T1 (de) | 2004-05-15 |
US6410444B1 (en) | 2002-06-25 |
EP1061111B1 (en) | 2004-05-06 |
US6436835B1 (en) | 2002-08-20 |
DE69917010D1 (de) | 2004-06-09 |
EP1061111A4 (en) | 2001-05-30 |
JP3672493B2 (ja) | 2005-07-20 |
KR100583842B1 (ko) | 2006-05-26 |
US20020045350A1 (en) | 2002-04-18 |
TW510917B (en) | 2002-11-21 |
EP1061111A1 (en) | 2000-12-20 |
DE69917010T2 (de) | 2005-04-07 |
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