JP2006237599A - 基板処理方法 - Google Patents
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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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02041—Cleaning
- H01L21/02057—Cleaning during device manufacture
- H01L21/02068—Cleaning during device manufacture during, before or after processing of conductive layers, e.g. polysilicon or amorphous silicon layers
- H01L21/02071—Cleaning during device manufacture during, before or after processing of conductive layers, e.g. polysilicon or amorphous silicon layers the processing being a delineation, e.g. RIE, of conductive layers
-
- 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
- H01L21/31—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
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31127—Etching organic layers
- H01L21/31133—Etching organic layers by chemical means
- H01L21/31138—Etching organic layers by chemical means by dry-etching
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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
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- Drying Of Semiconductors (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
Abstract
【解決手段】真空チャンバ52内に基板20を置き水蒸気を備えたパシベーションガスを導入しプラズマを発生させる。更に酸素と窒素(6:1〜200:1)を備えたストリッピングガスを真空チャンバ52内に導入しプラズマを発生させて基板20を処理する。処理後に真空チャンバ52から基板20を取り出す。
【選択図】 図2
Description
本発明は、半導体基板のストリッピング、パッシベーション及び腐食の抑制に関する。
集積回路の製造においては、金属を備える層を基板上に堆積し、この層の上にポリマー又は酸化物により構成されるレジストを形成し、そして層の露出部分をエッチングすることにより、導電性の造作(ぞうさく)が形成される。特にハロゲン含有エッチャント(例えば、Cl2、BCl3、CCl4、SiCl4、CF4、NF3、SF6及びこれらの混合物、これらは例えばSilicon Processingfor the VLSI Era, Vol.1, Chapter 16, by Wolf and Tauber, Lattice Press,1986に記載され、この開示内容は、参照としてここに併合される)が、基板のエッチングに用いられ、例えば、反応性イオンエッチングにおいては、エッチングされた基板はエッチャント残留物及び副生成物によって汚染される。特に、造作がAl−CuやTi−Wの如く電池対物質となることができるような合金で構成されている場合に、これらの汚染物は、特に雰囲気中の湿気と共同して、導電性の造作を腐食することがある。汚染物副生成物は、例えば、エッチャントからの残留ハロゲン、導電性の造作からの金属、及び/又はポリマーのレジスト材料との間の反応により生成される。これらは導電性の造作の側部上で反応副生成物が凝縮することにより、側壁堆積物の形態となることがある。また、エッチングの後に、エッチャントガスによるエッチングがされなかった残留レジストが、基板上に残ることもある。
このような汚染物の不利な効果を減らすためにエッチング済み基板を処理し、基板上の残留レジストを除去することが知られている。この基板の処理は、(i)残留レジスト(通常、ストリッピングと称される)を除去し、(ii)汚染物を除去又は変換し(通常、パッシベーションと称され、例えばCF4 プラズマへの暴露を通じてなされる)、(iii)導電性の造作の全ての部分の上に保護層を形成する(通常、抑制と称され、例えばCHF3プラズマへの暴露を通じてなされる)。しかし、既知のストリッピング、パッシベーション及び抑制の処理は、非常に長い処理時間を要し、及び/又は、高価で使用が難しく又は危険な材料を使用することを要する。
本発明の第1の側面に従って、エッチャント残留物及び副生成物の不利な効果を減ずるためのエッチング済み基板を処理する改良プロセスを、我々は見出した。このプロセスにおいては、真空下で、水蒸気、酸素及び窒素を備えるプロセスガスから形成されるプラズマに、基板が暴露される。(i)水蒸気と(ii)酸素及び窒素の合計との体積の比は、(1)約1:2から約2:1、好ましくは0.8:1から1:0.8、そして特に約1:1、又は、(2)約1:4から約1:40、好ましくは1:6から1:20、そして特に約1:10である。好ましくは、約1から約10トールの圧力及び約150゜から約400℃の温度の真空チャンバ内で、このプロセスが遂行される。基板がプラズマに暴露される時間は、一般的には、約10から約240秒、好ましくは約20から約60秒である。一般的に、処理時間が長いほど、腐食が防止される時間も長くなる。
[0007]
[発明の実施の形態]
本発明のプロセスは、シリコンやガリウムヒ素等の半導体材料を典型的に備えたエッチング済み基板20の上で行われる。基板20上の導電性の造作22は好ましくは、金属層、例えば、アルミニウム、Al−Cu合金等のアルミニウム合金、銅及び場合によってはシリコンを備え、また、例えば、Ti、W、Ti−W合金、又は、TiN、及び/又は、例えばSi、TiN又はTi−W合金等の反射防止層を含む拡散遮蔽層を備えていてもよい。基板20は、(i)エッチャント副生成物24、(ii)残留レジスト26、及び(iii)造作の側壁上の側壁堆積物27を有する、エッチング済みの導電性の造作22を有している。造作22上のエッチャント副生成物24は、典型的には、基板20のエッチング中に生成されるラジカル及び化合物を含有する残留ハロゲンを備えている。残留レジスト26は、エッチング後に基板上に残るレジストの一部である。造作22の側壁堆積物27は典型的には、(i)炭素及び水素、(ii)アルミニウム等の金属含有層からの金属、及び、(iii)ボロン及び窒素等のエッチャントガスを含んだ有機化合物を備える。
以下の実施例が、本発明のプロセスを例示する。実施例の全てが、カリフォルニア州サンタクララのアプライドマテリアルズ社から商業的に入手可能な「AMATPRECISION 5000 METAL ETCHER」において実施された。この「PRECISION 5000」装置は、パッシベーション及びストリッピングチャンバ(図示のように)に接続されるエッチングチャンバ(図示されず)を有し、雰囲気に暴露されることなく、基板はエッチングチャンバからパッシベーション及びストリッピングチャンバへと移送が可能である。装置のエッチングチャンバ(図示されず)はまた、チャンバ内のプラズマ強度を増強する磁場を随意発生させるために、チャンバを包囲する誘導コイルを備えている。これらの実施例は、直径約200mm(8インチ)、厚さ0.73mmのシリコンウエハ上で実施された。
Claims (4)
- ハロゲン含有エッチャントを用いたエッチング後の半導体ウエハを処理するプロセスであって、
(a)真空チャンバ内に基板を置くステップと、
(b)水蒸気を備えたパッシベーションガスを真空チャンバ内に導入するステップと、
(c)該パッシベーションガスからプラズマを発生させるステップと、
(d)酸素と窒素を備えたストリッピングガスを真空チャンバ内に導入するステップであって、酸素の窒素に対する体積流量比(VO2:VN2)が、約6:1〜約200:1である、前記ステップと、
(e)該ストリッピングガスからプラズマを発生させるステップと、
(f)処理後の基板を前記真空チャンバから取り出すステップと、
を有する処理プロセス。 - 酸素の窒素に対する前記体積流量比(VO2:VN2)が、約10:1〜約12:1である請求項1に記載の処理プロセス。
- 前記真空チャンバが150℃〜400℃の温度及び1トール〜10トールの圧力に維持される請求項1に記載の処理プロセス。
- 少なくとも約24時間空気に曝露された場合の耐腐食性を基板に与えるように、プロセスガスのプラズマが基板をパッシベーションするような、温度及び圧力の条件に前記真空チャンバが維持される、請求項1に記載の処理プロセス。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US19182894A | 1994-02-03 | 1994-02-03 | |
US08/268,377 US5545289A (en) | 1994-02-03 | 1994-06-29 | Passivating, stripping and corrosion inhibition of semiconductor substrates |
US08/369,237 US5631803A (en) | 1995-01-06 | 1995-01-06 | Erosion resistant electrostatic chuck with improved cooling system |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP05695298A Division JP3795220B2 (ja) | 1994-02-03 | 1998-03-09 | 基板処理方法 |
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Publication Number | Publication Date |
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JP2006237599A true JP2006237599A (ja) | 2006-09-07 |
JP4167268B2 JP4167268B2 (ja) | 2008-10-15 |
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Application Number | Title | Priority Date | Filing Date |
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JP7521234A Expired - Fee Related JP2839040B2 (ja) | 1994-02-03 | 1995-01-27 | 半導体基板のパッシベーション |
JP05695298A Expired - Fee Related JP3795220B2 (ja) | 1994-02-03 | 1998-03-09 | 基板処理方法 |
JP2006032939A Expired - Fee Related JP4167268B2 (ja) | 1994-02-03 | 2006-02-09 | 基板をパッシベーションするプロセス |
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Application Number | Title | Priority Date | Filing Date |
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JP7521234A Expired - Fee Related JP2839040B2 (ja) | 1994-02-03 | 1995-01-27 | 半導体基板のパッシベーション |
JP05695298A Expired - Fee Related JP3795220B2 (ja) | 1994-02-03 | 1998-03-09 | 基板処理方法 |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0692140A1 (ja) |
JP (3) | JP2839040B2 (ja) |
KR (1) | KR100336916B1 (ja) |
WO (2) | WO1995021458A1 (ja) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3129144B2 (ja) * | 1995-04-21 | 2001-01-29 | 日本電気株式会社 | アッシング方法 |
KR19980064028A (ko) * | 1996-12-12 | 1998-10-07 | 윌리엄비.켐플러 | 금속의 사후 에칭 탈플루오르 저온 공정 |
US6209551B1 (en) * | 1997-06-11 | 2001-04-03 | Lam Research Corporation | Methods and compositions for post-etch layer stack treatment in semiconductor fabrication |
US5968275A (en) * | 1997-06-25 | 1999-10-19 | Lam Research Corporation | Methods and apparatus for passivating a substrate in a plasma reactor |
US7615037B2 (en) * | 2005-12-14 | 2009-11-10 | Stryker Corporation | Removable inlet manifold for a medical/surgical waste collection system, the manifold including a driver for actuating a valve integral with the waste collection system |
US20100062149A1 (en) | 2008-09-08 | 2010-03-11 | Applied Materials, Inc. | Method for tuning a deposition rate during an atomic layer deposition process |
US8491967B2 (en) * | 2008-09-08 | 2013-07-23 | Applied Materials, Inc. | In-situ chamber treatment and deposition process |
JP5601806B2 (ja) * | 2009-08-25 | 2014-10-08 | 日新製鋼株式会社 | 塗膜密着性に優れたステンレス鋼板の製造方法 |
JP6861817B2 (ja) * | 2016-12-14 | 2021-04-21 | マトソン テクノロジー インコーポレイテッドMattson Technology, Inc. | 急速熱活性化プロセスと連係した、プラズマを使用する原子層エッチングプロセス |
CN112041966A (zh) * | 2018-03-30 | 2020-12-04 | 朗姆研究公司 | 使用碳氟化合物阻止层的形貌选择性和区域选择性ald |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55158275A (en) * | 1979-05-28 | 1980-12-09 | Hitachi Ltd | Corrosion preventing method for al and al alloy |
JPS5830133A (ja) * | 1981-08-18 | 1983-02-22 | Matsushita Electric Ind Co Ltd | プラズマエツチング処理方法 |
JPS6370428A (ja) * | 1986-09-11 | 1988-03-30 | Anelva Corp | プラズマ処理装置 |
JPH0777211B2 (ja) * | 1987-08-19 | 1995-08-16 | 富士通株式会社 | アッシング方法 |
US4961820A (en) * | 1988-06-09 | 1990-10-09 | Fujitsu Limited | Ashing method for removing an organic film on a substance of a semiconductor device under fabrication |
JP2890432B2 (ja) * | 1989-01-10 | 1999-05-17 | 富士通株式会社 | 有機物の灰化方法 |
DE69033663T2 (de) * | 1989-08-28 | 2001-06-21 | Hitachi Ltd | Verfahren zur Behandlung eines Aluminium enthaltenden Musters |
US5000820A (en) * | 1989-12-20 | 1991-03-19 | Texas Instruments Incorporated | Methods and apparatus for etching mercury cadmium telluride |
WO1992000601A1 (en) * | 1990-06-27 | 1992-01-09 | Fujitsu Limited | Method of manufacturing semiconductor integrated circuit and equipment for the manufacture |
JP3058979B2 (ja) * | 1991-02-22 | 2000-07-04 | 宮城沖電気株式会社 | Al合金のドライエッチング後の腐蝕防止方法 |
US5200031A (en) * | 1991-08-26 | 1993-04-06 | Applied Materials, Inc. | Method for removal of photoresist over metal which also removes or inactivates corrosion-forming materials remaining from one or more previous metal etch steps |
US5174856A (en) * | 1991-08-26 | 1992-12-29 | Applied Materials, Inc. | Method for removal of photoresist over metal which also removes or inactivates corrosion-forming materials remaining from previous metal etch |
US5221424A (en) * | 1991-11-21 | 1993-06-22 | Applied Materials, Inc. | Method for removal of photoresist over metal which also removes or inactivates corosion-forming materials remaining from previous metal etch |
US5348619A (en) * | 1992-09-03 | 1994-09-20 | Texas Instruments Incorporated | Metal selective polymer removal |
-
1995
- 1995-01-27 WO PCT/US1995/001100 patent/WO1995021458A1/en active IP Right Grant
- 1995-01-27 KR KR1019950704392A patent/KR100336916B1/ko not_active IP Right Cessation
- 1995-01-27 JP JP7521234A patent/JP2839040B2/ja not_active Expired - Fee Related
- 1995-01-27 WO PCT/US1995/001101 patent/WO1995022171A2/en not_active Application Discontinuation
- 1995-01-27 EP EP95908706A patent/EP0692140A1/en not_active Withdrawn
-
1998
- 1998-03-09 JP JP05695298A patent/JP3795220B2/ja not_active Expired - Fee Related
-
2006
- 2006-02-09 JP JP2006032939A patent/JP4167268B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO1995021458A1 (en) | 1995-08-10 |
JPH09500763A (ja) | 1997-01-21 |
EP0692140A1 (en) | 1996-01-17 |
JP3795220B2 (ja) | 2006-07-12 |
WO1995022171A3 (en) | 1995-09-08 |
WO1995022171A2 (en) | 1995-08-17 |
JP2839040B2 (ja) | 1998-12-16 |
KR100336916B1 (ko) | 2002-12-02 |
JPH1174250A (ja) | 1999-03-16 |
JP4167268B2 (ja) | 2008-10-15 |
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