KR20100128333A - 기판 에칭 시스템 및 프로세스의 방법 및 장치 - Google Patents
기판 에칭 시스템 및 프로세스의 방법 및 장치 Download PDFInfo
- Publication number
- KR20100128333A KR20100128333A KR1020107023432A KR20107023432A KR20100128333A KR 20100128333 A KR20100128333 A KR 20100128333A KR 1020107023432 A KR1020107023432 A KR 1020107023432A KR 20107023432 A KR20107023432 A KR 20107023432A KR 20100128333 A KR20100128333 A KR 20100128333A
- Authority
- KR
- South Korea
- Prior art keywords
- gas
- chamber
- etching
- substrate
- flow
- 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.)
- Ceased
Links
- 238000005530 etching Methods 0.000 title claims abstract description 141
- 238000000034 method Methods 0.000 title claims abstract description 122
- 239000000758 substrate Substances 0.000 title claims abstract description 100
- 230000008569 process Effects 0.000 title claims abstract description 65
- 238000000151 deposition Methods 0.000 claims abstract description 32
- 238000005137 deposition process Methods 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 29
- 239000010703 silicon Substances 0.000 claims description 29
- 239000010410 layer Substances 0.000 claims description 22
- 238000004891 communication Methods 0.000 claims description 19
- 238000012545 processing Methods 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000011241 protective layer Substances 0.000 claims description 7
- -1 oxide Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 17
- 230000008859 change Effects 0.000 abstract description 4
- 238000004378 air conditioning Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 323
- 239000000126 substance Substances 0.000 description 31
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 27
- 230000008021 deposition Effects 0.000 description 27
- 239000000203 mixture Substances 0.000 description 25
- 238000002156 mixing Methods 0.000 description 20
- 230000007704 transition Effects 0.000 description 18
- 235000020637 scallop Nutrition 0.000 description 12
- 238000005259 measurement Methods 0.000 description 11
- 241000237509 Patinopecten sp. Species 0.000 description 9
- 238000001816 cooling Methods 0.000 description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 239000010408 film Substances 0.000 description 8
- 238000011065 in-situ storage Methods 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- 238000009499 grossing Methods 0.000 description 5
- 238000003801 milling Methods 0.000 description 5
- 230000004044 response Effects 0.000 description 5
- XPDWGBQVDMORPB-UHFFFAOYSA-N Fluoroform Chemical compound FC(F)F XPDWGBQVDMORPB-UHFFFAOYSA-N 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 241000237503 Pectinidae Species 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 229910018503 SF6 Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000001934 delay Effects 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000004377 microelectronic Methods 0.000 description 2
- BCCOBQSFUDVTJQ-UHFFFAOYSA-N octafluorocyclobutane Chemical compound FC1(F)C(F)(F)C(F)(F)C1(F)F BCCOBQSFUDVTJQ-UHFFFAOYSA-N 0.000 description 2
- 235000019407 octafluorocyclobutane Nutrition 0.000 description 2
- 229920002120 photoresistant polymer Polymers 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 2
- 229960000909 sulfur hexafluoride Drugs 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 239000010795 gaseous waste Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000013047 polymeric layer Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012546 transfer Methods 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
- H01L21/02—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
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/3065—Plasma etching; Reactive-ion etching
- H01L21/30655—Plasma etching; Reactive-ion etching comprising alternated and repeated etching and passivation steps, e.g. Bosch process
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/0318—Processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/87169—Supply and exhaust
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Drying Of Semiconductors (AREA)
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US3866408P | 2008-03-21 | 2008-03-21 | |
| US61/038,664 | 2008-03-21 | ||
| US4057008P | 2008-03-28 | 2008-03-28 | |
| US61/040,570 | 2008-03-28 | ||
| US9482008P | 2008-09-05 | 2008-09-05 | |
| US61/094,820 | 2008-09-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20100128333A true KR20100128333A (ko) | 2010-12-07 |
Family
ID=41091536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020107023432A Ceased KR20100128333A (ko) | 2008-03-21 | 2009-03-19 | 기판 에칭 시스템 및 프로세스의 방법 및 장치 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20090272717A1 (enExample) |
| JP (1) | JP5608157B2 (enExample) |
| KR (1) | KR20100128333A (enExample) |
| CN (2) | CN101978479A (enExample) |
| TW (1) | TWI538045B (enExample) |
| WO (1) | WO2009117565A2 (enExample) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170110035A (ko) * | 2016-03-22 | 2017-10-10 | 도쿄엘렉트론가부시키가이샤 | 플라즈마 처리 방법 |
| KR20170110039A (ko) * | 2016-03-22 | 2017-10-10 | 도쿄엘렉트론가부시키가이샤 | 플라즈마 처리 방법 |
| KR20170110036A (ko) * | 2016-03-22 | 2017-10-10 | 도쿄엘렉트론가부시키가이샤 | 플라즈마 처리 방법 |
Families Citing this family (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011021539A1 (ja) * | 2009-08-20 | 2011-02-24 | 東京エレクトロン株式会社 | プラズマ処理装置とプラズマ処理方法 |
| US8501629B2 (en) * | 2009-12-23 | 2013-08-06 | Applied Materials, Inc. | Smooth SiConi etch for silicon-containing films |
| US8133349B1 (en) | 2010-11-03 | 2012-03-13 | Lam Research Corporation | Rapid and uniform gas switching for a plasma etch process |
| KR101932250B1 (ko) * | 2011-06-30 | 2019-03-20 | 어플라이드 머티어리얼스, 인코포레이티드 | 고속 가스 교환, 고속 가스 전환 및 프로그램 가능한 가스 전달을 위한 방법 및 장치 |
| US9023227B2 (en) | 2011-06-30 | 2015-05-05 | Applied Materials, Inc. | Increased deposition efficiency and higher chamber conductance with source power increase in an inductively coupled plasma (ICP) chamber |
| CN103159163B (zh) * | 2011-12-19 | 2016-06-08 | 北京北方微电子基地设备工艺研究中心有限责任公司 | 基片刻蚀方法及基片处理设备 |
| US9679751B2 (en) | 2012-03-15 | 2017-06-13 | Lam Research Corporation | Chamber filler kit for plasma etch chamber useful for fast gas switching |
| US20130255784A1 (en) * | 2012-03-30 | 2013-10-03 | Applied Materials, Inc. | Gas delivery systems and methods of use thereof |
| US9887095B2 (en) | 2013-03-12 | 2018-02-06 | Taiwan Semiconductor Manufacturing Company, Ltd. | System and method for an etch process with silicon concentration control |
| US9488315B2 (en) * | 2013-03-15 | 2016-11-08 | Applied Materials, Inc. | Gas distribution apparatus for directional and proportional delivery of process gas to a process chamber |
| JP6101227B2 (ja) * | 2014-03-17 | 2017-03-22 | 株式会社東芝 | プラズマダイシング方法およびプラズマダイシング装置 |
| US10100407B2 (en) * | 2014-12-19 | 2018-10-16 | Lam Research Corporation | Hardware and process for film uniformity improvement |
| US10658222B2 (en) | 2015-01-16 | 2020-05-19 | Lam Research Corporation | Moveable edge coupling ring for edge process control during semiconductor wafer processing |
| TW201634738A (zh) * | 2015-01-22 | 2016-10-01 | 應用材料股份有限公司 | 用於在空間上分離之原子層沉積腔室的經改良注射器 |
| TWI701357B (zh) * | 2015-03-17 | 2020-08-11 | 美商應用材料股份有限公司 | 用於膜沉積的脈衝化電漿 |
| JP6444794B2 (ja) * | 2015-03-30 | 2018-12-26 | Sppテクノロジーズ株式会社 | 半導体素子の製造方法及びその製造に用いられるプラズマエッチング装置 |
| US10957561B2 (en) * | 2015-07-30 | 2021-03-23 | Lam Research Corporation | Gas delivery system |
| US10192751B2 (en) | 2015-10-15 | 2019-01-29 | Lam Research Corporation | Systems and methods for ultrahigh selective nitride etch |
| US10825659B2 (en) * | 2016-01-07 | 2020-11-03 | Lam Research Corporation | Substrate processing chamber including multiple gas injection points and dual injector |
| US10256075B2 (en) * | 2016-01-22 | 2019-04-09 | Applied Materials, Inc. | Gas splitting by time average injection into different zones by fast gas valves |
| US10699878B2 (en) | 2016-02-12 | 2020-06-30 | Lam Research Corporation | Chamber member of a plasma source and pedestal with radially outward positioned lift pins for translation of a substrate c-ring |
| US10651015B2 (en) | 2016-02-12 | 2020-05-12 | Lam Research Corporation | Variable depth edge ring for etch uniformity control |
| US10147588B2 (en) | 2016-02-12 | 2018-12-04 | Lam Research Corporation | System and method for increasing electron density levels in a plasma of a substrate processing system |
| US10438833B2 (en) | 2016-02-16 | 2019-10-08 | Lam Research Corporation | Wafer lift ring system for wafer transfer |
| US10410832B2 (en) | 2016-08-19 | 2019-09-10 | Lam Research Corporation | Control of on-wafer CD uniformity with movable edge ring and gas injection adjustment |
| CN118380375A (zh) | 2017-11-21 | 2024-07-23 | 朗姆研究公司 | 底部边缘环和中部边缘环 |
| WO2019226711A1 (en) * | 2018-05-22 | 2019-11-28 | Etx Corporation | Method and apparatus for transfer of two-dimensional materials |
| JP7218226B2 (ja) * | 2019-03-22 | 2023-02-06 | 株式会社アルバック | プラズマエッチング方法 |
| US20210118734A1 (en) * | 2019-10-22 | 2021-04-22 | Semiconductor Components Industries, Llc | Plasma-singulated, contaminant-reduced semiconductor die |
| JP7466686B2 (ja) | 2020-03-23 | 2024-04-12 | ラム リサーチ コーポレーション | 基板処理システムにおける中間リング腐食補償 |
| JP2023547315A (ja) * | 2020-10-23 | 2023-11-10 | ラム リサーチ コーポレーション | プラズマエッチングリアクタ内への気相堆積プロセスの統合 |
| US11342195B1 (en) | 2021-02-04 | 2022-05-24 | Tokyo Electron Limited | Methods for anisotropic etch of silicon-based materials with selectivity to organic materials |
| US11940819B1 (en) * | 2023-01-20 | 2024-03-26 | Applied Materials, Inc. | Mass flow controller based fast gas exchange |
| CN119905397A (zh) * | 2023-10-27 | 2025-04-29 | 中微半导体设备(上海)股份有限公司 | 一种等离子体工艺方法及等离子体处理设备 |
Family Cites Families (28)
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| JPS62143427A (ja) * | 1985-12-18 | 1987-06-26 | Hitachi Ltd | 処理ガス供給装置 |
| DE4241045C1 (de) * | 1992-12-05 | 1994-05-26 | Bosch Gmbh Robert | Verfahren zum anisotropen Ätzen von Silicium |
| US6507155B1 (en) * | 2000-04-06 | 2003-01-14 | Applied Materials Inc. | Inductively coupled plasma source with controllable power deposition |
| US6685798B1 (en) * | 2000-07-06 | 2004-02-03 | Applied Materials, Inc | Plasma reactor having a symmetrical parallel conductor coil antenna |
| US6462481B1 (en) * | 2000-07-06 | 2002-10-08 | Applied Materials Inc. | Plasma reactor having a symmetric parallel conductor coil antenna |
| US6414648B1 (en) * | 2000-07-06 | 2002-07-02 | Applied Materials, Inc. | Plasma reactor having a symmetric parallel conductor coil antenna |
| US6409933B1 (en) * | 2000-07-06 | 2002-06-25 | Applied Materials, Inc. | Plasma reactor having a symmetric parallel conductor coil antenna |
| US6694915B1 (en) * | 2000-07-06 | 2004-02-24 | Applied Materials, Inc | Plasma reactor having a symmetrical parallel conductor coil antenna |
| US6593244B1 (en) * | 2000-09-11 | 2003-07-15 | Applied Materials Inc. | Process for etching conductors at high etch rates |
| FR2834382B1 (fr) * | 2002-01-03 | 2005-03-18 | Cit Alcatel | Procede et dispositif de gravure anisotrope du silicium a haut facteur d'aspect |
| TWI241868B (en) * | 2002-02-06 | 2005-10-11 | Matsushita Electric Industrial Co Ltd | Plasma processing method and apparatus |
| US6849554B2 (en) * | 2002-05-01 | 2005-02-01 | Applied Materials, Inc. | Method of etching a deep trench having a tapered profile in silicon |
| US6846746B2 (en) * | 2002-05-01 | 2005-01-25 | Applied Materials, Inc. | Method of smoothing a trench sidewall after a deep trench silicon etch process |
| FR2842387B1 (fr) * | 2002-07-11 | 2005-07-08 | Cit Alcatel | Chemisage chauffant pour reacteur de gravure plasma, procede de gravure pour sa mise en oeuvre |
| US7074723B2 (en) * | 2002-08-02 | 2006-07-11 | Applied Materials, Inc. | Method of plasma etching a deeply recessed feature in a substrate using a plasma source gas modulated etchant system |
| US6924235B2 (en) * | 2002-08-16 | 2005-08-02 | Unaxis Usa Inc. | Sidewall smoothing in high aspect ratio/deep etching using a discrete gas switching method |
| US6900133B2 (en) * | 2002-09-18 | 2005-05-31 | Applied Materials, Inc | Method of etching variable depth features in a crystalline substrate |
| US20040097077A1 (en) * | 2002-11-15 | 2004-05-20 | Applied Materials, Inc. | Method and apparatus for etching a deep trench |
| US20040157457A1 (en) * | 2003-02-12 | 2004-08-12 | Songlin Xu | Methods of using polymer films to form micro-structures |
| US7144521B2 (en) * | 2003-08-22 | 2006-12-05 | Lam Research Corporation | High aspect ratio etch using modulation of RF powers of various frequencies |
| US7405521B2 (en) * | 2003-08-22 | 2008-07-29 | Lam Research Corporation | Multiple frequency plasma processor method and apparatus |
| KR100549204B1 (ko) * | 2003-10-14 | 2006-02-02 | 주식회사 리드시스템 | 실리콘 이방성 식각 방법 |
| US20050112891A1 (en) * | 2003-10-21 | 2005-05-26 | David Johnson | Notch-free etching of high aspect SOI structures using a time division multiplex process and RF bias modulation |
| JP4593402B2 (ja) * | 2005-08-25 | 2010-12-08 | 株式会社日立ハイテクノロジーズ | エッチング方法およびエッチング装置 |
| KR100655445B1 (ko) * | 2005-10-04 | 2006-12-08 | 삼성전자주식회사 | 플라즈마 처리 장치 및 방법, 그리고 반도체 제조 설비 |
| US8088248B2 (en) * | 2006-01-11 | 2012-01-03 | Lam Research Corporation | Gas switching section including valves having different flow coefficients for gas distribution system |
| JP2008205436A (ja) * | 2007-01-26 | 2008-09-04 | Toshiba Corp | 微細構造体の製造方法 |
| JP2009182059A (ja) * | 2008-01-29 | 2009-08-13 | Toshiba Corp | ドライエッチング方法 |
-
2009
- 2009-03-19 JP JP2011500951A patent/JP5608157B2/ja active Active
- 2009-03-19 US US12/407,548 patent/US20090272717A1/en not_active Abandoned
- 2009-03-19 WO PCT/US2009/037647 patent/WO2009117565A2/en not_active Ceased
- 2009-03-19 KR KR1020107023432A patent/KR20100128333A/ko not_active Ceased
- 2009-03-19 CN CN2009801103642A patent/CN101978479A/zh active Pending
- 2009-03-19 CN CN201110402772.4A patent/CN102446739B/zh active Active
- 2009-03-20 TW TW098109255A patent/TWI538045B/zh active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170110035A (ko) * | 2016-03-22 | 2017-10-10 | 도쿄엘렉트론가부시키가이샤 | 플라즈마 처리 방법 |
| KR20170110039A (ko) * | 2016-03-22 | 2017-10-10 | 도쿄엘렉트론가부시키가이샤 | 플라즈마 처리 방법 |
| KR20170110036A (ko) * | 2016-03-22 | 2017-10-10 | 도쿄엘렉트론가부시키가이샤 | 플라즈마 처리 방법 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011515855A (ja) | 2011-05-19 |
| TWI538045B (zh) | 2016-06-11 |
| CN102446739B (zh) | 2016-01-20 |
| JP5608157B2 (ja) | 2014-10-15 |
| US20090272717A1 (en) | 2009-11-05 |
| TW201005822A (en) | 2010-02-01 |
| WO2009117565A3 (en) | 2009-11-12 |
| CN102446739A (zh) | 2012-05-09 |
| CN101978479A (zh) | 2011-02-16 |
| WO2009117565A2 (en) | 2009-09-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PA0105 | International application |
Patent event date: 20101020 Patent event code: PA01051R01D Comment text: International Patent Application |
|
| PG1501 | Laying open of application | ||
| A201 | Request for examination | ||
| PA0201 | Request for examination |
Patent event code: PA02012R01D Patent event date: 20130116 Comment text: Request for Examination of Application |
|
| E902 | Notification of reason for refusal | ||
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