WO2013141225A1 - ラッピング加工用研磨材およびそれを用いた基板の製造方法 - Google Patents
ラッピング加工用研磨材およびそれを用いた基板の製造方法 Download PDFInfo
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- WO2013141225A1 WO2013141225A1 PCT/JP2013/057763 JP2013057763W WO2013141225A1 WO 2013141225 A1 WO2013141225 A1 WO 2013141225A1 JP 2013057763 W JP2013057763 W JP 2013057763W WO 2013141225 A1 WO2013141225 A1 WO 2013141225A1
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- WO
- WIPO (PCT)
- Prior art keywords
- lapping
- abrasive
- polishing
- particles
- substrate
- Prior art date
Links
- 238000005498 polishing Methods 0.000 title claims abstract description 67
- 239000000758 substrate Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000000463 material Substances 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 92
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 38
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 31
- 229910052845 zircon Inorganic materials 0.000 claims description 30
- 238000012545 processing Methods 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 6
- 230000008929 regeneration Effects 0.000 claims description 3
- 238000011069 regeneration method Methods 0.000 claims description 3
- 230000001172 regenerating effect Effects 0.000 claims description 2
- 230000003746 surface roughness Effects 0.000 abstract description 17
- 239000011856 silicon-based particle Substances 0.000 abstract 2
- 239000000203 mixture Substances 0.000 description 25
- 239000003082 abrasive agent Substances 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 12
- 239000004065 semiconductor Substances 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 238000004064 recycling Methods 0.000 description 9
- 238000011156 evaluation Methods 0.000 description 8
- 239000012535 impurity Substances 0.000 description 8
- 239000003921 oil Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 235000012431 wafers Nutrition 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical group O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000007730 finishing process Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 229910006501 ZrSiO Inorganic materials 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000002280 amphoteric surfactant Substances 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 150000007514 bases Chemical class 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- -1 titanium and iron Chemical class 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
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- 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
- B24B37/00—Lapping machines or devices; Accessories
-
- 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
- C09K3/149—Antislip compositions
-
- 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
- B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
- B24B57/02—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
-
- 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
-
- 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
- H01L21/02002—Preparing wafers
- H01L21/02005—Preparing bulk and homogeneous wafers
- H01L21/02008—Multistep processes
- H01L21/0201—Specific process step
- H01L21/02013—Grinding, lapping
-
- 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 potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table 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
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
Definitions
- the present invention relates to an abrasive for lapping used as abrasive grains in lapping.
- polishing is often performed using a polishing pad.
- the edge portion of the polishing surface is scraped obliquely (sometimes referred to as “sagging”). Is likely to occur.
- a polishing process called lapping may be performed mainly for the purpose of adjusting the thickness of the object to be polished.
- This lapping process is required to have a high polishing rate because the main purpose is thickness adjustment.
- problems such as insufficient smoothness being obtained by finish polishing and an increase in the time required for finish polishing may occur.
- Patent Document 1 a lapping polishing material composed of various alumina particles and zircon particles has been studied (for example, Patent Document 1).
- the surface roughness of the polished surface and the polishing rate are generally in a trade-off relationship, and as clearly shown in Patent Document 2, if one is improved, the other becomes worse. There was a tendency and it was difficult to make them compatible.
- the lapping processing abrasive according to the present invention has an alumina particle having an average particle diameter of 3.5 ⁇ m or more and less than 11.5 ⁇ m, and an average particle diameter of 0.2 to 0.9 times the average particle diameter of the alumina particle.
- the content of the zircon particles is not less than 1% by mass and less than 40% by mass based on the total mass of the abrasive.
- the substrate manufacturing method according to the present invention includes a step of polishing the substrate using the lapping processing abrasive.
- an abrasive for lapping which has an improved polishing rate without impairing the surface roughness. Furthermore, a lapping abrasive having improved both surface roughness and polishing rate at the same time is also provided.
- a substrate manufacturing method capable of manufacturing a substrate having excellent characteristics with excellent productivity is also provided.
- the lapping abrasive material according to the present invention comprises alumina particles and zircon particles.
- alumina particles refer to metal oxides whose main component is aluminum oxide.
- Various transformations are known for aluminum oxide, such as ⁇ -alumina and ⁇ -alumina, and any of them may be used in the present invention.
- Alumina is also classified into brown fused alumina and white fused alumina depending on the production method, and any of these can be used.
- Alumina may contain impurities other than aluminum as impurities.
- brown fused alumina having a relatively low content of titanium or iron as the alumina particles.
- the alumina particles contain impurity metals such as titanium and iron, the content is 10 based on the total mass of the alumina particles.
- the content is preferably at most mass%, more preferably at most 5 mass%.
- Alumina particles having a metal impurity content of 1% by mass or less can also be used.
- the purity of the alumina particles is increased, the purification cost increases, but the improvement in the abrasive properties is saturated. The effect of the present invention can be achieved without increasing the purity.
- the average particle size of the alumina particles is 3.5 ⁇ m or more and less than 11.5 ⁇ m. This is because if the average particle size of the alumina particles is too small, the polishing rate may be insufficient, and if it is too large, the roughness of the polished surface may deteriorate.
- the average particle diameter of the alumina particles and the zircon particles described later can be measured by various methods.
- the average particle diameter is obtained by three-dimensional measurement based on the Coulter principle. Specifically, it was measured by a precision particle size distribution measuring device Coulter Multisizer 3 (manufactured by Beckman Coulter).
- the particle size at which the integrated value in the particle size distribution obtained by the measurement is 50% is defined as the average particle size.
- the zircon particles used in the present invention are zirconium silicate minerals that are naturally produced as zircon sand.
- the ideal chemical composition of zircon is represented by ZrSiO 4 .
- the zircon particles it is preferable that there are few metal impurities like alumina particles. Therefore, when the zircon particles contain a metal such as titanium or iron, the content is preferably 10% by mass or less, preferably 5% by mass or less, based on the total mass of the zircon particles. More preferred is 1% by mass or less.
- Zircon particles having high purity can be easily obtained, and those having a metal impurity content of 0.5% by mass or less can also be used.
- the average particle size of the zircon particles is smaller than the average particle size of the above-mentioned alumina particles. Specifically, the average particle size of the zircon particles is 0.2 times or more and less than 0.9 times the average particle size of the alumina particles. This is because the polishing rate may be insufficient if the average particle size of the zircon particles is excessively large.
- the lapping abrasive material according to the present invention comprises the above-mentioned alumina particles and zircon particles, but can also contain other abrasive particles as long as the effects of the present invention are not impaired.
- examples of such particles include silica, silicon carbide, titania, zirconia, mullite, and garnet.
- the abrasive for lapping according to the present invention has a low content of other abrasive particles other than the alumina particles and the zircon particles.
- the total mass of the alumina particles and the zircon particles is preferably 90% by mass or more, and more preferably 99% by mass or more, based on the total mass of the lapping processing abrasive.
- the mixing ratio of the alumina particles and the zircon particles is limited.
- the content of zircon particles is preferably 1% by mass or more and less than 40% by mass, preferably 5% by mass or more and less than 40% by mass, based on the total mass of the lapping abrasive. More preferably, it is more than mass% and less than 25 mass%, and most preferably it is 10 mass% or more and less than 25 mass%.
- the polishing rate may be insufficient, and if too large, the surface roughness and recycling characteristics are This is because it tends to get worse.
- the blending ratio and the average particle diameter of the alumina particles and the zircon particles it is possible to dramatically improve the characteristics of the lapping abrasive. Such a technique has not been known so far, and it becomes possible to prepare lapping abrasives suitable for different purposes while using the same raw material.
- the abrasive according to the present invention is often used in combination with water or lapping oil when used for lapping.
- the lapping abrasive according to the present invention can be combined with a medium such as water and other additives as necessary to prepare a lapping composition.
- the dispersion of abrasive particles can be stabilized by adding a dispersant as an additive, and as a result, the occurrence of scratches and the like can be suppressed.
- surfactants can be used as additives.
- the surfactant can be arbitrarily selected from a cationic surfactant, an anionic surfactant, a nonionic surfactant, an amphoteric surfactant and the like according to the purpose.
- the pH can be adjusted by adding an acid or a basic compound to the composition for lapping.
- the pH of the composition can also be adjusted for the purpose of improving the polishing characteristics such as the polishing rate and the storage stability of the composition.
- a substrate manufacturing method includes a step of polishing a substrate using the lapping processing abrasive described above.
- the substrate can be arbitrarily selected from those used for glass substrates for optical lenses, in addition to various general substrates used for semiconductor elements. Specifically, it is selected from a quartz substrate, a quartz substrate, a silicon semiconductor substrate, a compound semiconductor substrate, an oxide semiconductor substrate, a photomask substrate, a glass substrate, and the like. For example, a plurality of substrates may be mixed or stacked.
- Polishing using a lapping abrasive is generally performed using a polishing apparatus (also referred to as a lapping machine) equipped with a polishing surface plate.
- a polishing apparatus also referred to as a lapping machine
- Such a polishing apparatus is appropriately selected according to the purpose of processing. For example, by polishing an object to be polished (sometimes called a workpiece) such as a semiconductor substrate between two polishing surface plates. There are those that process both sides of the substrate at the same time, and those that place the substrate on a support base, press the polishing surface plate from above, and sandwich only the substrate to process only one side. These can be arbitrarily selected according to the target substrate.
- the lapping polishing material is supplied to the contact surface between the substrate and the polishing surface plate.
- water or lapping oil can be supplied.
- wrapping oils are commercially available depending on the application, for example, water-soluble oils and oil-based oils, and silicon wafers and quartzs.
- the lapping processing abrasive may be dispersed in a solvent such as water and supplied as a lapping processing composition to which other additives are added as necessary.
- the lapping abrasive material according to the present invention can be collected and reused once used for lapping. Since the lapping abrasive or lapping composition used once contains effective abrasive particles, it can be used again for lapping. By performing such reuse, it is possible to reduce the consumption amount of the lapping abrasive or lapping composition, which is advantageous in terms of cost. In general, such recycling may reduce the polishing rate.
- the surface roughness after polishing may be deteriorated by metal scraps or foreign matters generated by polishing.
- the method for manufacturing a substrate according to the present invention such performance deterioration is small, and there is no practical problem. Since the lapping process is not a substrate finishing process, even if there is a slight deterioration in surface roughness, the effect on the final product is small, and the above-described cost effect is greater.
- the lapping abrasive material after use can be mixed with the unused lapping abrasive material.
- the above-described substrate manufacturing method can further include a regeneration step of regenerating the lapping processing abrasive after being used in the lapping processing.
- the lapping abrasive material after use can be recycled by any conventionally known recycling method.
- the lapping processing abrasive is regenerated by the following method.
- the lapping abrasive is mixed with a liquid medium such as water at the time of use, the lapping abrasive after use is recovered as a slurry.
- this slurry generally contains, as foreign matter, abrasive scraps cut by lapping, metal scraps, solidified abrasive particles, metal rust, and the like.
- the relatively large of these foreign objects can be removed by first passing the slurry through a filter or sieve.
- a part of foreign material with many metal components can also be removed with a magnet.
- the slurry from which relatively large foreign matters have been removed is then subjected to a treatment for removing fine particles.
- a treatment for removing fine particles is not particularly limited, for example, the slurry is supplied to a centrifugal classifier, and a medium such as water and abrasive particles smaller than the specified range are removed.
- the lapping abrasive is recycled and can be used for new lapping. That is, the lapping abrasive according to the present invention is excellent in recycling characteristics. Such regeneration makes it possible to reduce the manufacturing cost of the substrate.
- the regenerated lapping polishing material cannot fully exhibit the same characteristics as those before the recycle due to the foreign matters that cannot be removed and the surface shape of the abrasive particles changing. For this reason, it becomes possible to reduce the influence of the characteristic fluctuation
- Examples 101 and 102, Comparative Examples 101 and 102 Preparation of lapping abrasive and lapping composition
- brown fused alumina and zircon sand were prepared and blended to prepare a lapping abrasive.
- the average particle diameter and blending ratio of each were as shown in Table 1.
- the same lapping processing abrasives were prepared for Comparative Examples 101a to 101c and Comparative Examples 102a to 102c.
- Lapping process test was performed under the following conditions. A silicon wafer having a diameter of 62.6 mm was selected as a workpiece, and four wafers were mounted on a lapping machine (device name: 4BN 3M5L, manufactured by Hamai Sangyo Co., Ltd.) per batch. As the surface plate, a diamond-shaped grooved MGC surface plate (upper surface plate groove pitch 6 mm, lower surface plate groove pitch 12 mm, groove width 0.6 mm, depth 5 mm) was used, and lapping was performed under the following conditions. Load: 100 g / cm 2 , Lower platen rotation speed 45rpm, Supply rate of lapping composition: 100 cc / min Processing time: 10 minutes
- polishing rate was calculated from the amount of weight loss due to lapping by measuring the weight of the silicon wafer before and after lapping.
- the roughness of the workpiece surface after lapping was measured under the following conditions using a surface roughness measuring instrument (Surfcom 1400D (trade name), manufactured by Tokyo Seimitsu Co., Ltd.). Calculation standard: JIS-'94 standard, Measurement length: 10.0mm, Cut-off wavelength: 0.8mm, Measurement speed: 0.3 mm / s, Cut-off type: 2RC (phase compensation), Inclination correction: Least square curve correction In addition, the measurement was performed at one central portion and four peripheral portions of the wafer, and the average value was defined as the surface roughness Ra.
- a surface roughness measuring instrument (Surfcom 1400D (trade name), manufactured by Tokyo Seimitsu Co., Ltd.). Calculation standard: JIS-'94 standard, Measurement length: 10.0mm, Cut-off wavelength: 0.8mm, Measurement speed: 0.3 mm / s, Cut-off type: 2RC (phase compensation), Inclination correction: Least square curve correction
- the measurement was performed at one central portion and
- the average particle diameter was measured under the following conditions using a precision particle size distribution analyzer Coulter Multisizer 3 (manufactured by Beckman Coulter, Inc.).
- AP size 100 ⁇ m AP Current: 1600 ⁇ A, GAIN: 2, POLARITY: +, Total Count: 50000
- each measured value has a slight variation.
- the example 101 is equivalent to the comparative examples 101a to 101c
- the example 102 is equivalent to the comparative examples 102a to 102c. Both are greatly improved over the comparative example. That is, according to the present invention, it is understood that the polishing rate is improved without impairing the surface roughness.
- Examples 201 and 202, comparative examples 201 and 202 Evaluation of recycling characteristics Evaluation of recycling characteristics was performed as follows. First, lapping was performed by the above-described method using the prepared composition for lapping. Thereafter, the entire amount of the used composition was recovered, and the composition was used as it was, and a new wafer was lapped. Then, the composition was further collected and the next lapping process was repeated. Each composition was lapped 10 times, and the polishing rate and surface roughness at each stage were measured. The obtained results were as shown in Table 2.
- the compositions used in Examples 201 and 202 and Comparative Examples 201 and 202 were the same as those in Examples 101 and 102 and Comparative Examples 101 and 102. For Examples 201 and 202, the same evaluation experiment was performed twice.
- Examples 301 to 303, comparative examples 301 and 302 Preparation of lapping abrasive and lapping composition
- a brown fused alumina and zircon sand were prepared and blended to prepare a lapping abrasive.
- Each average particle diameter and blending ratio are as shown in Table 3.
- 1400 g of water and 30 g of commercially available wrapping oil were blended with 300 g of these abrasives and dispersed with a stirrer to obtain a composition for lapping.
- the recycling characteristics were evaluated using the obtained composition for lapping.
- the lapping process was performed under the same conditions as in Example 201 except that the supply speed of the lapping composition was changed to 50 cc / min and the processing time was changed to 20 minutes.
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- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
Abstract
Description
本発明によるラッピング加工用研磨材は、アルミナ質粒子と、ジルコン粒子を含んでなる。
アルミナ質粒子は金属不純物含有量が1質量%以下のものも使用できるが、アルミナ質粒子の純度を高くすると、精製コストが大きくなる一方で、研磨材特性の改良は飽和してしまうので、過度に純度を高くしないでも本発明の効果を達成することができる。
本発明による基板の製造方法は、前記したラッピング加工用研磨材を用いて基板を研磨する工程を含むものである。ここで、基板とは、半導体素子に用いられる一般的な各種基板の他、光学レンズ用ガラス基板などに用いられるものから任意に選択することができる。具体的には、石英基板、水晶基板、シリコン半導体基板、化合物半導体基板、酸化物半導体基板、フォトマスク基板、ガラス基板などから選択される。これらは、例えば複数の基板が混在していたり、積層しているものでもよい。
このため、未使用のラッピング加工用研磨材に、再生された研磨材を配合することによって、研磨材の特性変動の影響を低減することが可能となる。すなわち、継続的にラッピング加工を実施する際に、未使用の研磨材と、再生した研磨材とを混合したものを継続的に使用することができる。
ラッピング加工用研磨材およびラッピング加工用組成物の調製
まず、褐色溶融アルミナとジルコンサンドとを準備し、それらを配合することでラッピング加工用研磨材を調製した。それぞれの平均粒子径および配合比は表1に示す通りであった。なお、実験結果のばらつきを確認するために、比較例101a~101c、および比較例102a~102cのラッピング加工用研磨材はそれぞれ同等のものを準備した。
ラッピング加工試験は以下の条件により行った。
ワークには直径62.6mmのシリコンウェハーを選択し、これをラップマシン(装置名:4BN 3M5L、浜井産業株式会社製)に1バッチあたり4個マウントした。定盤として、菱形溝入MGC定盤(上定盤溝ピッチ6mm、下定盤溝ピッチ12mm、溝幅0.6mm、深さ5mm)を用い、下記の条件でラッピング加工を行った。
荷重: 100g/cm2、
下定盤回転数45rpm、
ラッピング加工用組成物の供給速度: 100cc/分
加工時間: 10分間
研磨速度は、ラッピング加工の前後におけるシリコンウェハーの重量を測定し、ラッピング加工による重量減少量から算出した。
ラッピング加工後のワーク表面の粗さは、表面粗さ測定器(サーフコム1400D(商品名)、株式会社東京精密製)を用いて下記の条件で測定した。
算出規格: JIS-’94規格、
測定長さ: 10.0mm、
カットオフ波長: 0.8mm、
測定速度: 0.3mm/s、
カットオフ種別: 2RC(位相補償)、
傾斜補正: 最小二乗曲線補正
なお、測定はウェハーの中心部1か所と、外周部4か所について行い、その平均値を表面粗さRaとした。
平均粒子径は、精密粒度分布測定装置コールター・マルチサイザー3(ベックマン・コールター社製)を用いて、下記の条件で測定した。
APサイズ: 100μm
AP Current: 1600μA、
GAIN: 2、
POLARITY: +、
Total Count: 50000個
リサイクル特性の評価
リサイクル特性の評価は以下のように行った。まず、調製したラッピング加工用組成物を用いて、前記した方法でラッピング加工を行った。その後、使用後の組成物を全量回収し、その組成物をそのまま用いて、新たなウェハーに対してラッピング加工を行った。そして、さらに組成物を回収し、次のラッピング加工を行うことを繰り返した。
それぞれの組成物についてラッピング加工を10回行い、各段階における研磨速度および表面粗さを測定した。得られた結果は表2に示す通りであった。なお、実施例201、202、比較例201、202に用いた組成物は、実施例101、102、比較例101、102と同じ組成のものを用いた。また、実施例201および202については同じ評価実験を2回行った。
ラッピング加工用研磨材およびラッピング加工用組成物の調製
褐色溶融アルミナとジルコンサンドとを準備し、それらを配合することでラッピング加工用研磨材を調製した。それぞれの平均粒子径および配合比は表3に示す通りであった。次に、これらの研磨材300gに、水1400gおよび市販のラッピングオイル30gを配合し、攪拌機で分散させてラッピング加工用組成物とした。
得られたラッピング加工用組成物を用いて、リサイクル特性を評価した。評価に際してはでラッピング加工において、ラッピング加工用組成物の供給速度を50cc/分に、加工時間を20分間に変更した他は、実施例201と同様の条件で行った。
Claims (7)
- 平均粒子径が3.5μm以上11.5μm未満であるアルミナ質粒子と、平均粒子径が前記アルミナ質粒子の平均粒子径の0.2倍以上0.9倍未満であるジルコン粒子とを含んでなるラッピング加工用研磨材であって、前記ジルコン粒子の含有量が、研磨材の総質量を基準として1質量%以上40質量%未満であることを特徴とするラッピング加工用研磨材。
- 前記ジルコン粒子の含有量が、研磨材全体の5質量%以上40質量%未満である、請求項1に記載のラッピング加工用研磨材。
- 前記アルミナ質粒子と前記ジルコン粒子との合計含有量が、研磨材の総質量を基準として90質量%以上である、請求項1または2に記載のラッピング加工用研磨材。
- 請求項1~3のいずれか1項に記載のラッピング加工用研磨材を用いて、基板を研磨する研磨工程を含んでなることを特徴とする基板の製造方法。
- 研磨定盤を具備する研磨装置を準備し、前記ラッピング加工用研磨材を、前記研磨装置における研磨定盤と基板との間に供給しながら、前記研磨定盤を用いて前記基板をラッピング加工する研磨工程を備えてなる、請求項4に記載の方法。
- 使用後のラッピング加工用研磨材を、再生する再生工程をさらに有し、再生されたラッピング加工用研磨材を前記の研磨工程に使用する、請求項4または5に記載の方法。
- 前記の再生されたラッピング加工用研磨材の使用に先立って、未使用のラッピング加工用研磨材を混合する調整工程をさらに有する、請求項6に記載の方法。
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015183052A (ja) * | 2014-03-24 | 2015-10-22 | ケヰテック株式会社 | 研磨剤組成物 |
WO2016199340A1 (ja) * | 2015-06-08 | 2016-12-15 | 信越化学工業株式会社 | 研磨組成物及びその製造方法並びに研磨方法 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01121164A (ja) * | 1987-11-05 | 1989-05-12 | Shin Etsu Chem Co Ltd | 微粉研摩材 |
JPH04146987A (ja) * | 1990-10-09 | 1992-05-20 | Nippon Kenmazai Kogyo Kk | アルミナ―ジルコニア系ラップ研磨材とその製造方法及び研磨用組成物 |
JPH083543A (ja) * | 1994-06-24 | 1996-01-09 | Heisei Sankei Kk | 研磨材の製造方法 |
JPH08113773A (ja) * | 1994-10-18 | 1996-05-07 | Fujimi Inkooporeetetsudo:Kk | 砥粒組成物 |
JP2000210648A (ja) * | 1999-01-21 | 2000-08-02 | Mikura Bussan Kk | 研磨廃液からAl2O3成分とZrSiO4成分の混合無機粉末の作成方法および混合無機粉末 |
JP2004149582A (ja) * | 2002-10-29 | 2004-05-27 | Tatsumori:Kk | 研磨剤及びラッピング方法 |
JP2005252298A (ja) * | 1993-12-14 | 2005-09-15 | Toshiba Corp | 銅系金属用研磨液および銅系金属の研磨方法 |
JP2008138190A (ja) * | 2006-11-08 | 2008-06-19 | Fuji Chem Ind Co Ltd | レオロジーコントロール剤 |
JP2008163154A (ja) * | 2006-12-27 | 2008-07-17 | Kao Corp | 研磨液組成物の製造方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5575885A (en) * | 1993-12-14 | 1996-11-19 | Kabushiki Kaisha Toshiba | Copper-based metal polishing solution and method for manufacturing semiconductor device |
JP3416855B2 (ja) * | 1994-04-15 | 2003-06-16 | 株式会社フジミインコーポレーテッド | 研磨用組成物および研磨方法 |
JP3752083B2 (ja) * | 1998-09-03 | 2006-03-08 | 三倉物産株式会社 | 研磨剤及びその製造方法 |
US7044836B2 (en) * | 2003-04-21 | 2006-05-16 | Cabot Microelectronics Corporation | Coated metal oxide particles for CMP |
JP4202183B2 (ja) * | 2003-05-09 | 2008-12-24 | 株式会社フジミインコーポレーテッド | 研磨用組成物 |
CN101689493A (zh) * | 2007-06-20 | 2010-03-31 | 旭硝子株式会社 | 研磨用组合物及半导体集成电路装置的制造方法 |
-
2013
- 2013-03-15 TW TW102109304A patent/TWI547552B/zh active
- 2013-03-19 JP JP2014506237A patent/JP5819515B2/ja active Active
- 2013-03-19 WO PCT/JP2013/057763 patent/WO2013141225A1/ja active Application Filing
- 2013-03-19 CN CN201380014888.8A patent/CN104245230B/zh active Active
- 2013-03-19 KR KR20147028481A patent/KR20150002658A/ko not_active Application Discontinuation
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01121164A (ja) * | 1987-11-05 | 1989-05-12 | Shin Etsu Chem Co Ltd | 微粉研摩材 |
JPH04146987A (ja) * | 1990-10-09 | 1992-05-20 | Nippon Kenmazai Kogyo Kk | アルミナ―ジルコニア系ラップ研磨材とその製造方法及び研磨用組成物 |
JP2005252298A (ja) * | 1993-12-14 | 2005-09-15 | Toshiba Corp | 銅系金属用研磨液および銅系金属の研磨方法 |
JPH083543A (ja) * | 1994-06-24 | 1996-01-09 | Heisei Sankei Kk | 研磨材の製造方法 |
JPH08113773A (ja) * | 1994-10-18 | 1996-05-07 | Fujimi Inkooporeetetsudo:Kk | 砥粒組成物 |
JP2000210648A (ja) * | 1999-01-21 | 2000-08-02 | Mikura Bussan Kk | 研磨廃液からAl2O3成分とZrSiO4成分の混合無機粉末の作成方法および混合無機粉末 |
JP2004149582A (ja) * | 2002-10-29 | 2004-05-27 | Tatsumori:Kk | 研磨剤及びラッピング方法 |
JP2008138190A (ja) * | 2006-11-08 | 2008-06-19 | Fuji Chem Ind Co Ltd | レオロジーコントロール剤 |
JP2008163154A (ja) * | 2006-12-27 | 2008-07-17 | Kao Corp | 研磨液組成物の製造方法 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015183052A (ja) * | 2014-03-24 | 2015-10-22 | ケヰテック株式会社 | 研磨剤組成物 |
WO2016199340A1 (ja) * | 2015-06-08 | 2016-12-15 | 信越化学工業株式会社 | 研磨組成物及びその製造方法並びに研磨方法 |
JP2017005050A (ja) * | 2015-06-08 | 2017-01-05 | 信越化学工業株式会社 | 研磨組成物及びその製造方法並びに研磨方法 |
US11214711B2 (en) | 2015-06-08 | 2022-01-04 | Shin-Etsu Chemical Co., Ltd. | Polishing composition, method for producing same, and polishing method |
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