KR20070032966A - 정전척 - Google Patents
정전척 Download PDFInfo
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- KR20070032966A KR20070032966A KR20067027690A KR20067027690A KR20070032966A KR 20070032966 A KR20070032966 A KR 20070032966A KR 20067027690 A KR20067027690 A KR 20067027690A KR 20067027690 A KR20067027690 A KR 20067027690A KR 20070032966 A KR20070032966 A KR 20070032966A
- Authority
- KR
- South Korea
- Prior art keywords
- electrostatic chuck
- wafer
- mounting surface
- aluminum nitride
- plate
- Prior art date
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- 238000001179 sorption measurement Methods 0.000 claims abstract description 28
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 82
- 239000002245 particle Substances 0.000 claims description 41
- 239000011148 porous material Substances 0.000 claims description 34
- 239000000919 ceramic Substances 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 230000001590 oxidative effect Effects 0.000 claims description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- 229910052684 Cerium Inorganic materials 0.000 claims description 6
- 229910044991 metal oxide Inorganic materials 0.000 claims description 5
- 150000004706 metal oxides Chemical class 0.000 claims description 5
- 238000005245 sintering Methods 0.000 claims description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims 1
- 238000005336 cracking Methods 0.000 abstract description 14
- 235000012431 wafers Nutrition 0.000 description 146
- 239000007789 gas Substances 0.000 description 128
- 239000010410 layer Substances 0.000 description 68
- 230000015556 catabolic process Effects 0.000 description 28
- 238000000034 method Methods 0.000 description 25
- 238000009826 distribution Methods 0.000 description 21
- 238000004519 manufacturing process Methods 0.000 description 10
- 239000004065 semiconductor Substances 0.000 description 10
- 239000010408 film Substances 0.000 description 9
- 238000005530 etching Methods 0.000 description 8
- 238000010304 firing Methods 0.000 description 8
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 239000011812 mixed powder Substances 0.000 description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 6
- 229910052721 tungsten Inorganic materials 0.000 description 6
- 239000010937 tungsten Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 230000003252 repetitive effect Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
- 229920005822 acrylic binder Polymers 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000007606 doctor blade method Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 238000005488 sandblasting Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000001465 metallisation Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 239000013464 silicone adhesive Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- 238000007088 Archimedes method Methods 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 206010040844 Skin exfoliation Diseases 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- -1 aluminum nitride nitride Chemical class 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- DRVWBEJJZZTIGJ-UHFFFAOYSA-N cerium(3+);oxygen(2-) Chemical group [O-2].[O-2].[O-2].[Ce+3].[Ce+3] DRVWBEJJZZTIGJ-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000005404 monopole Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 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
- 239000010409 thin film Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- H01L21/687—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 mechanical means, e.g. chucks, clamps or pinches
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N13/00—Clutches or holding devices using electrostatic attraction, e.g. using Johnson-Rahbek effect
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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)
- Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)
- Jigs For Machine Tools (AREA)
Abstract
Description
Claims (17)
- 한 쌍의 주면을 구비하고, 그 한쪽 주면을 웨이퍼를 탑재하는 탑재면으로 하는 판상체와, 그 판상체의 다른 쪽 주면 또는 내부에 설치된 흡착용 전극으로 구성되는 정전척에 있어서,상기 판상체에 관통되도록 형성된 적어도 한개의 가스 도입용 관통공과, 서로 이간된 복수의 볼록부에 의하여 상기 탑재면 위에 형성되고 또한 상기 관통공과 연통되도록 형성된 가스유로와, 상기 판상체 외주에 형성된 환형벽부를 구비하며,상기 볼록부의 평면 형상이 4개의 변과 그 4개의 변을 연결하는 호형부로 이루어지며, 상기 볼록부가 상기 탑재면에 똑같이 형성되어 이루어지는 것을 특징으로 하는 정전척.
- 제1항에 있어서, 상기 볼록부가 격자모양으로 배열되어 있는 것을 특징으로 하는 정전척.
- 제1항에 있어서, 상기 가스유로의 저면과 상기 볼록부 혹은 상기 환형벽부가 연결되는 부위가 원호형인 것을 특징으로 하는 정전척.
- 제1항에 있어서, 상기 가스유로 저면의 산술 평균 거칠기(Ra)가 2㎛이하인 것을 특징으로 하는 정전척.
- 제1항에 있어서, 상기 환형벽부 폭이 0.5∼10㎜이고, 상기 볼록부의 대변 간격이 1.5∼10㎜임과 아울러, 상기 볼록부 및 상기 환형벽부 최상면의 총면적이 상기 탑재면 면적의 50∼80%이고, 또한 상기 가스유로 저면으로부터 상기 볼록부 최상면까지의 거리가 10∼100㎛인 것을 특징으로 하는 정전척.
- 제1항에 있어서, 상기 관통공은 상기 탑재면 중심에 1개와 그 중심에 대한 동심원상에 여러개 형성되어 있는 것을 특징으로 하는 정전척.
- 제1항에 있어서, 상기 환형벽부를 탑재면의 최외주와 내측에 구비하고, 최외주의 환형벽부와 내측 환형벽부 사이에 복수의 관통공을 구비하고, 내측 환형벽부의 내측에 관통공을 더 구비하는 것을 특징으로 하는 정전척.
- 제1항에 있어서, 상기 판상체의 최대 직경이 180∼500㎜이고, 상기 관통공은 직경이 0.1∼5㎜이고 4∼100개 구비되어 있는 것을 특징으로 하는 정전척.
- 제1항에 있어서, 상기 판상체의 다른 쪽 주면에 열교환 부재가 설치된 것을 특징으로 하는 정전척.
- 제9항에 있어서, 상기 열교환 부재가 금속판으로 구성되는 것을 특징으로 하 는 정전척.
- 제1항에 있어서, 상기 판상체는 알루미나 또는 질화알루미늄을 주성분으로 하는 소결체로 구성되는 것을 특징으로 하는 정전척.
- 제1항에 있어서, 상기 판상체가 질화알루미늄을 주성분으로 하는 유전체로 구성되며, 상기 전극으로부터 상기 탑재면까지의 평균거리가 0.015cm이상이고, 상기 전극과 상기 탑재면 사이의 유전체층의 체적 고유 저항값과 상기 평균거리의 곱이 1×107∼5×1016Ω·㎠임과 아울러, 상기 유전체층을 형성하는 질화알루미늄의 평균입경이 1∼20㎛이고, 또한 상기 유전체층의 개기공율이 1%이하인 것을 특징으로 하는 정전척.
- 제12항에 있어서, 상기 유전체층에는 입자내 기공과 입계 기공이 존재하고, 입계 기공의 평균 직경이 질화알루미늄의 평균 결정입경보다 작은 것을 특징으로 하는 정전척.
- 제12항에 있어서, 상기 유전체층의 입계 기공의 비율(Sg)과 입자내 기공의 비율(Sc)의 비(Sg/Sc)가 1.0이하인 것을 특징으로 하는 정전척.
- 제12항에 있어서, 상기 유전체층은 주성분으로서 질화알루미늄을 함유하고, 또한 부성분으로서 3a족 금속 산화물을 0.2∼15질량% 함유하는 것을 특징으로 하는 정전척.
- 제15항에 있어서, 상기 3a족 금속이 세륨인 것을 특징으로 하는 정전척.
- 제12항에 있어서, 상기 질화알루미늄으로 구성된 판형 세라믹스체는 0.2∼200MPa의 비산화성 분위기 중에서 1800∼1900℃이하의 온도로 0.5∼20시간 이내 유지하고 소결시켜 얻어지는 것을 특징으로 하는 정전척.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004190462A JP4666960B2 (ja) | 2004-06-28 | 2004-06-28 | 静電チャック |
JPJP-P-2004-00190462 | 2004-06-28 | ||
JPJP-P-2004-00190461 | 2004-06-28 | ||
JP2004190461A JP4540407B2 (ja) | 2004-06-28 | 2004-06-28 | 静電チャック |
PCT/JP2005/011743 WO2006001425A1 (ja) | 2004-06-28 | 2005-06-27 | 静電チャック |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20070032966A true KR20070032966A (ko) | 2007-03-23 |
KR101142000B1 KR101142000B1 (ko) | 2012-05-17 |
Family
ID=35781860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020067027690A KR101142000B1 (ko) | 2004-06-28 | 2005-06-27 | 정전척 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7586734B2 (ko) |
KR (1) | KR101142000B1 (ko) |
CN (1) | CN100470756C (ko) |
TW (1) | TWI267940B (ko) |
WO (1) | WO2006001425A1 (ko) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101007534B1 (ko) * | 2008-11-05 | 2011-01-14 | 주식회사 테스 | 반도체 제조장치 및 이를 이용한 실리콘 산화막 건식 식각 방법 |
KR101310775B1 (ko) * | 2011-09-28 | 2013-09-25 | 주식회사 티씨케이 | 엘이디용 서셉터의 포켓 가공방법 |
KR20210018531A (ko) * | 2016-07-25 | 2021-02-17 | 교세라 가부시키가이샤 | 시료 유지구 |
Families Citing this family (45)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101116180B (zh) * | 2005-02-03 | 2011-08-17 | 信越聚合物株式会社 | 固定载体、固定载体的制造方法、固定载体的使用方法、以及基板收纳容器 |
US8226769B2 (en) * | 2006-04-27 | 2012-07-24 | Applied Materials, Inc. | Substrate support with electrostatic chuck having dual temperature zones |
JP4937724B2 (ja) * | 2006-12-15 | 2012-05-23 | 東京エレクトロン株式会社 | 基板載置台、基板載置台の製造方法、基板処理装置、流体供給機構 |
KR20110093904A (ko) * | 2008-11-25 | 2011-08-18 | 엠 큐브드 테크놀로지스, 인크. | 정전 척 |
CN102265390B (zh) * | 2008-12-25 | 2014-10-15 | 株式会社爱发科 | 静电卡盘用卡板的制造方法 |
JP5470601B2 (ja) * | 2009-03-02 | 2014-04-16 | 新光電気工業株式会社 | 静電チャック |
JP5218865B2 (ja) * | 2010-03-26 | 2013-06-26 | Toto株式会社 | 静電チャック |
US8546732B2 (en) * | 2010-11-10 | 2013-10-01 | Lam Research Corporation | Heating plate with planar heater zones for semiconductor processing |
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-
2005
- 2005-06-27 US US11/571,347 patent/US7586734B2/en not_active Expired - Fee Related
- 2005-06-27 WO PCT/JP2005/011743 patent/WO2006001425A1/ja active Application Filing
- 2005-06-27 TW TW094121434A patent/TWI267940B/zh not_active IP Right Cessation
- 2005-06-27 KR KR1020067027690A patent/KR101142000B1/ko active IP Right Grant
- 2005-06-27 CN CNB2005800290751A patent/CN100470756C/zh not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101007534B1 (ko) * | 2008-11-05 | 2011-01-14 | 주식회사 테스 | 반도체 제조장치 및 이를 이용한 실리콘 산화막 건식 식각 방법 |
KR101310775B1 (ko) * | 2011-09-28 | 2013-09-25 | 주식회사 티씨케이 | 엘이디용 서셉터의 포켓 가공방법 |
KR20210018531A (ko) * | 2016-07-25 | 2021-02-17 | 교세라 가부시키가이샤 | 시료 유지구 |
US11139194B2 (en) | 2016-07-25 | 2021-10-05 | Kyocera Corporation | Sample holder |
Also Published As
Publication number | Publication date |
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KR101142000B1 (ko) | 2012-05-17 |
TW200625501A (en) | 2006-07-16 |
TWI267940B (en) | 2006-12-01 |
CN100470756C (zh) | 2009-03-18 |
CN101010791A (zh) | 2007-08-01 |
WO2006001425A1 (ja) | 2006-01-05 |
US20080037194A1 (en) | 2008-02-14 |
US7586734B2 (en) | 2009-09-08 |
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