JP2007299837A - 静電チャック - Google Patents
静電チャック Download PDFInfo
- Publication number
- JP2007299837A JP2007299837A JP2006124971A JP2006124971A JP2007299837A JP 2007299837 A JP2007299837 A JP 2007299837A JP 2006124971 A JP2006124971 A JP 2006124971A JP 2006124971 A JP2006124971 A JP 2006124971A JP 2007299837 A JP2007299837 A JP 2007299837A
- Authority
- JP
- Japan
- Prior art keywords
- electrostatic chuck
- wafer
- silicone rubber
- reinforcing silica
- silica
- 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.)
- Granted
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 106
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 51
- 239000004945 silicone rubber Substances 0.000 claims abstract description 51
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 50
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 46
- 239000002245 particle Substances 0.000 claims abstract description 28
- 239000000945 filler Substances 0.000 claims abstract description 9
- 239000012212 insulator Substances 0.000 claims description 11
- 229910021485 fumed silica Inorganic materials 0.000 claims description 4
- 239000003463 adsorbent Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 24
- 238000000034 method Methods 0.000 abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000004065 semiconductor Substances 0.000 abstract description 5
- 238000001020 plasma etching Methods 0.000 abstract description 4
- 238000005468 ion implantation Methods 0.000 abstract description 3
- 238000004544 sputter deposition Methods 0.000 abstract description 3
- 239000011810 insulating material Substances 0.000 abstract 2
- 229920001721 polyimide Polymers 0.000 description 19
- 239000000203 mixture Substances 0.000 description 18
- 239000004642 Polyimide Substances 0.000 description 14
- 229920001296 polysiloxane Polymers 0.000 description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- 239000000919 ceramic Substances 0.000 description 9
- -1 dimethylsiloxane units Chemical group 0.000 description 9
- 229920001971 elastomer Polymers 0.000 description 8
- 239000005060 rubber Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 239000011231 conductive filler Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 229920002799 BoPET Polymers 0.000 description 3
- 238000007259 addition reaction Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 125000003342 alkenyl group Chemical group 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 150000001451 organic peroxides Chemical class 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- DMWVYCCGCQPJEA-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane Chemical compound CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C DMWVYCCGCQPJEA-UHFFFAOYSA-N 0.000 description 2
- 229910002012 Aerosil® Inorganic materials 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 125000005372 silanol group Chemical group 0.000 description 2
- 229920002050 silicone resin Polymers 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910002016 Aerosil® 200 Inorganic materials 0.000 description 1
- 229910002018 Aerosil® 300 Inorganic materials 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000005046 Chlorosilane Substances 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 239000000370 acceptor Substances 0.000 description 1
- 125000003668 acetyloxy group Chemical group [H]C([H])([H])C(=O)O[*] 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 125000003545 alkoxy group Chemical group 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
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- KOPOQZFJUQMUML-UHFFFAOYSA-N chlorosilane Chemical compound Cl[SiH3] KOPOQZFJUQMUML-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 1
- OLLFKUHHDPMQFR-UHFFFAOYSA-N dihydroxy(diphenyl)silane Chemical class C=1C=CC=CC=1[Si](O)(O)C1=CC=CC=C1 OLLFKUHHDPMQFR-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000008282 halocarbons Chemical group 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 125000001183 hydrocarbyl group Chemical group 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 229920006136 organohydrogenpolysiloxane Polymers 0.000 description 1
- 150000003961 organosilicon compounds Chemical class 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000007348 radical reaction Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 125000000725 trifluoropropyl group Chemical group [H]C([H])(*)C([H])([H])C(F)(F)F 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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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
- H01L21/683—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 for supporting or gripping
- H01L21/6831—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 for supporting or gripping using electrostatic chucks
- H01L21/6833—Details of electrostatic chucks
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- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
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- B32B25/02—Layered products comprising a layer of natural or synthetic rubber with fibres or particles being present as additives in the layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)
- Jigs For Machine Tools (AREA)
Abstract
【効果】本発明の静電チャックはウエハとの密着性が良く、冷却性能に優れる。よって、半導体集積回路の製造においてウエハの保持が必要となる工程、特に、プラズマエッチング工程やイオン注入工程、スパッタリング工程において、ウエハの温度を精度よく均一かつ一定に保つことができるため、高精度の加工を行うのに有用である。また、ウエハ吸着時に発生するパーティクルを低減でき、より細線加工に対応可能である。
【選択図】なし
Description
また、プラズマエッチング工程においては、ウエハがプラズマにより加熱されるのを抑えて、ウエハの温度分布を均一かつ一定とするため、冷却チラー等の冷却機構が静電チャックの裏面に設けられている。温度分布を均一かつ一定にすると、マスク材とエッチング対象物の下地との選択性が高くなり、また、異方性形状を得られやすいので、高精度のエッチングが可能となる。
ポリイミド製絶縁体層を用いた静電チャックは、容易に製造でき、安価であるが、プラズマガスに対する耐久性が充分でない。また、熱伝導率が低く、かつ硬いため接触熱抵抗が大きく、冷却性能が悪いという問題がある。更に、セラミック製絶縁体と同様にパーティクルが発生する問題がある。
この場合、補強性シリカが、BET法比表面積が50m2/g以上の煙霧質シリカ(乾式シリカ)であることが好ましく、更に補強性シリカ配合シリコーンゴム層の厚さが10〜150μmの範囲であることが好ましく、補強性シリカ配合シリコーンゴム層の硬さが50以上であり、かつ引張強さが5MPa以上であることが好ましい。
この補強性シリカ配合シリコーンゴム層は、補強性シリカを配合したシリコーンゴム組成物を硬化させることによって得ることができる。
この場合、補強性シリカ配合シリコーンゴム組成物のポリマー成分であるオルガノポリシロキサンは、他の合成ゴムに比べ非常に強度が弱く、それ自体単独では使用できるレベルのものではない。オルガノポリシロキサンに充填剤、特に補強性シリカを添加することにより使用可能な強度を発揮する。
RnSiO(4-n)/2 (1)
(nは1.95〜2.05の正数)
で示されるもので、式中Rは置換又は非置換の好ましくは炭素数1〜10、特に1〜8の一価炭化水素基を表し、具体的にはメチル基、エチル基、プロピル基等のアルキル基、シクロペンチル基、シクロヘキシル基等のシクロアルキル基、ビニル基、アリル基等のアルケニル基、フェニル基、トリル基等のアリール基あるいはこれらの水素原子が部分的に塩素原子、フッ素原子などで置換されたハロゲン化炭化水素基等が例示されるが、一般的にはオルガノポロシロキサンの主鎖がジメチルシロキサン単位からなるものあるいはこのオルガノポリシロキサンの主鎖にビニル基、フェニル基、トリフルオロプロピル基などを導入したものが好ましい。また分子鎖末端がトリオルガノシリル基又は水酸基で封鎖されたものとすればよいが、このトリオルガノシリル基としてはトリメチルシリル基、ジメチルビニルシリル基、トリビニルシリル基などが例示される。なお、この成分の平均重合度は200以上、回転粘度計による測定で25℃における粘度が0.3Pa・s以上のものが好ましく、平均重合度200未満では硬化後の機械的強度が劣り、脆くなる欠点がある。
また、特性評価には金属基板上に第1絶縁層として厚さ50μmのポリイミドフィルム、電極として銅箔パターン、第2絶縁層として厚さ25μmのポリイミドフィルムをそれぞれエポキシ接着剤で貼り合わせた構造の直径190mmのポリイミド製静電チャックを使用した。
ジメチルシロキサン単位99.7モル%、メチルビニルシロキサン単位0.3モル%からなる平均重合度8,000のメチルビニルポリシロキサン100質量部に、BET比表面積300m2/gの煙霧質シリカAerosil300(商品名、日本アエロジル(株)製)65質量部、構造式(2)で示されるジヒドロキシジメチルポリシロキサン15質量部をニーダーで混練りし、170℃で3時間の熱処理を行った。
ジメチルシロキサン単位99.85モル%、メチルビニルシロキサン単位0.15モル%からなる平均重合度8,000のメチルビニルポリシロキサン100質量部に、比表面積200m2/gの煙霧質シリカAerosil200(商品名、日本アエロジル(株)製)50質量部、構造式(2)で示されるジヒドロキシジメチルポリシロキサン8質量部をニーダーで混練りし、170℃で3時間の熱処理を行った。この補強性シリカ配合シリコーンゴム組成物を用い、実施例1と同様な方法で厚さ80μmの補強性シリカ配合シリコーンゴム層をポリイミド製静電チャック表面に設けた。
実施例1と同様な補強性シリカ配合シリコーンゴム組成物を用い、同様な方法で厚さ180μmの補強性シリカ配合シリコーンゴム層をポリイミド製静電チャック表面に設けた。
補強性シリカ配合シリコーンゴム層を表面に設けないポリイミド製静電チャックを用いた。
実施例2の補強性シリカ配合シリコーンゴム組成物に平均粒子径0.7μmの球状アルミナAO−502(商品名、アドマテックス(株)製)を100質量部添加混合し、同様な方法で厚さ80μmのシリコーンゴム層をポリイミド製静電チャック表面に設けた。
(冷却性能)
ブランクのポリイミド製静電チャックと実施例1,2及び比較例1で得られた各静電チャックの冷却性能の評価に冷却性能試験器を使用した。図1は、該冷却性能試験器の構成の概略を示す縦断面図である。図1において、静電チャック1をチャンバー2内の台3の上に装着した。台3には冷却水が循環する冷却管4が設けられ、静電チャック1を冷却するようになっている。8インチウエハ5を静電チャック1の上に設置した後、チャンバー2内の圧力を0.01Torrに減圧した。次いで、電源6から静電チャック1に、±0.5kVの直流電圧を供給し、静電チャック1上に8インチウエハ5を静電吸着させて固定した。
次いで、ヒーター7を用いて8インチウエハ5を150℃に加熱した後、4℃の冷却水を冷却管4内で循環させた。8インチウエハ5の温度が平衡状態になった時に、表面温度計8を用いて8インチウエハ5表面の温度を測定した。結果を表1,2に示す。
静電チャックを給電台に装着し、8インチウエハを静電チャックの上に設置した後、電源から±0.5kVの直流電圧を供給し、静電チャック上に8インチウエハを静電吸着させて1分間固定した。直流電圧をオフし、8インチウエハを脱着してから、新しい8インチウエハを用いて同様な静電吸着工程を繰り返した。吸着後の8インチウエハ裏面に付着した大きさ0.16μm以上のバックサイドパーティクルの数をパーティクルカウンタで測定した。結果を表1,2に示す。
実施例の静電チャックは、ブランクのポリイミド製静電チャックや比較例の静電チャックに比べ、冷却性能に優れ、ウエハに付着するバックサイドパーティクル数が少ないことが確認された。
2 チャンバー
3 台
4 冷却管
5 8インチウエハ
6 電源
7 ヒーター
8 表面温度計
Claims (4)
- 絶縁体層と、この絶縁体層内に設けられた電極を有する静電チャックの被吸着体と接触する表面に、補強性シリカが配合され、補強性シリカ以外に平均粒子径0.5μm以上の充填剤を含まないシリコーンゴム層を設けることを特徴とする静電チャック。
- 補強性シリカが、BET法比表面積が50m2/g以上の煙霧質シリカ(乾式シリカ)であることを特徴とする請求項1記載の静電チャック。
- 補強性シリカ配合シリコーンゴム層の厚さが10〜150μmの範囲であることを特徴とする請求項1又は2記載の静電チャック。
- 補強性シリカ配合シリコーンゴム層の硬さが50以上であり、かつ引張強さが5MPa以上であることを特徴とする請求項1,2又は3記載の静電チャック。
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JP2006124971A JP4381393B2 (ja) | 2006-04-28 | 2006-04-28 | 静電チャック |
US11/790,635 US7667943B2 (en) | 2006-04-28 | 2007-04-26 | Electrostatic chuck |
EP07251772.5A EP1850376B1 (en) | 2006-04-28 | 2007-04-27 | Electrostatic chuck |
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Cited By (2)
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JPWO2010087345A1 (ja) * | 2009-01-28 | 2012-08-02 | 旭硝子株式会社 | Euvリソグラフィ用反射型マスクブランクの製造方法 |
WO2022250394A1 (ko) * | 2021-05-24 | 2022-12-01 | 주식회사 아모센스 | 정전 척, 이를 포함하는 정전 척 히터 및 반도체 유지장치 |
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JP5053696B2 (ja) * | 2007-04-26 | 2012-10-17 | 信越化学工業株式会社 | 静電チャック |
US20090179158A1 (en) * | 2008-01-16 | 2009-07-16 | Varian Semiconductor Equpiment Associate, Inc. | In-vacuum protective liners |
TWI475594B (zh) | 2008-05-19 | 2015-03-01 | Entegris Inc | 靜電夾頭 |
EP2430654B1 (en) | 2009-05-15 | 2019-12-25 | Entegris, Inc. | Electrostatic chuck with polymer protrusions |
US8861170B2 (en) | 2009-05-15 | 2014-10-14 | Entegris, Inc. | Electrostatic chuck with photo-patternable soft protrusion contact surface |
CN102986017B (zh) | 2010-05-28 | 2015-09-16 | 恩特格林斯公司 | 高表面电阻率静电吸盘 |
WO2014114395A1 (en) * | 2013-01-22 | 2014-07-31 | Asml Netherlands B.V. | Electrostatic clamp |
US11289355B2 (en) | 2017-06-02 | 2022-03-29 | Lam Research Corporation | Electrostatic chuck for use in semiconductor processing |
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JPS5964245A (ja) | 1982-09-30 | 1984-04-12 | Fujitsu Ltd | 静電チヤツク |
JP2651840B2 (ja) * | 1988-07-15 | 1997-09-10 | 東レ・ダウコーニング・シリコーン株式会社 | シリコーンゴム接着剤 |
JPH0227748A (ja) | 1988-07-16 | 1990-01-30 | Tomoegawa Paper Co Ltd | 静電チャック装置及びその作成方法 |
JP2634343B2 (ja) | 1991-10-28 | 1997-07-23 | 信越化学工業株式会社 | 半導体ウェーハの保持方法 |
JP2925427B2 (ja) * | 1993-05-14 | 1999-07-28 | 信越化学工業株式会社 | 静電チャック |
US5528451A (en) * | 1994-11-02 | 1996-06-18 | Applied Materials, Inc | Erosion resistant electrostatic chuck |
JP2004031938A (ja) | 1996-03-04 | 2004-01-29 | Shin Etsu Chem Co Ltd | 静電チャック |
US6071630A (en) * | 1996-03-04 | 2000-06-06 | Shin-Etsu Chemical Co., Ltd. | Electrostatic chuck |
JPH10335439A (ja) | 1997-06-04 | 1998-12-18 | Shin Etsu Chem Co Ltd | 静電チャック |
JPH1187479A (ja) * | 1997-09-10 | 1999-03-30 | Shin Etsu Chem Co Ltd | 静電チャック |
JP4156699B2 (ja) | 1998-02-16 | 2008-09-24 | 株式会社巴川製紙所 | 静電チャック装置用シートおよび静電チャック装置 |
JP4121216B2 (ja) * | 1999-05-20 | 2008-07-23 | 信越化学工業株式会社 | 弾性変形可能な静電チャック及びその製造方法 |
JP3763710B2 (ja) * | 1999-09-29 | 2006-04-05 | 信越化学工業株式会社 | 防塵用カバーフィルム付きウエハ支持台及びその製造方法 |
JP2004253718A (ja) | 2003-02-21 | 2004-09-09 | Sumitomo Osaka Cement Co Ltd | 静電チャック及びそれを備えた板状体貼り合わせ装置 |
-
2006
- 2006-04-28 JP JP2006124971A patent/JP4381393B2/ja active Active
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2007
- 2007-04-26 US US11/790,635 patent/US7667943B2/en not_active Expired - Fee Related
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPWO2010087345A1 (ja) * | 2009-01-28 | 2012-08-02 | 旭硝子株式会社 | Euvリソグラフィ用反射型マスクブランクの製造方法 |
WO2022250394A1 (ko) * | 2021-05-24 | 2022-12-01 | 주식회사 아모센스 | 정전 척, 이를 포함하는 정전 척 히터 및 반도체 유지장치 |
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JP4381393B2 (ja) | 2009-12-09 |
EP1850376A2 (en) | 2007-10-31 |
US20070253139A1 (en) | 2007-11-01 |
EP1850376B1 (en) | 2018-12-05 |
EP1850376A3 (en) | 2010-01-13 |
US7667943B2 (en) | 2010-02-23 |
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