KR100750081B1 - 도핑되지 않은 이산화규소와 질화규소 위의 도핑된이산화규소를 선택적으로 에칭시키는 방법 - Google Patents
도핑되지 않은 이산화규소와 질화규소 위의 도핑된이산화규소를 선택적으로 에칭시키는 방법 Download PDFInfo
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- KR100750081B1 KR100750081B1 KR1020037000043A KR20037000043A KR100750081B1 KR 100750081 B1 KR100750081 B1 KR 100750081B1 KR 1020037000043 A KR1020037000043 A KR 1020037000043A KR 20037000043 A KR20037000043 A KR 20037000043A KR 100750081 B1 KR100750081 B1 KR 100750081B1
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- Prior art keywords
- silicon dioxide
- etchant
- etching
- doped silicon
- silicon nitride
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 244
- 235000012239 silicon dioxide Nutrition 0.000 title claims abstract description 119
- 239000000377 silicon dioxide Substances 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 88
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910052581 Si3N4 Inorganic materials 0.000 title claims abstract description 47
- 238000005530 etching Methods 0.000 title claims description 35
- 239000004065 semiconductor Substances 0.000 claims abstract description 33
- 238000001312 dry etching Methods 0.000 claims description 39
- 238000002161 passivation Methods 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 23
- 239000000758 substrate Substances 0.000 claims description 20
- 238000001020 plasma etching Methods 0.000 claims description 19
- 238000000059 patterning Methods 0.000 claims description 11
- 239000005388 borosilicate glass Substances 0.000 claims description 7
- 239000005360 phosphosilicate glass Substances 0.000 claims description 7
- 238000000992 sputter etching Methods 0.000 claims description 3
- 238000000206 photolithography Methods 0.000 claims 1
- 239000005368 silicate glass Substances 0.000 claims 1
- 239000000654 additive Substances 0.000 abstract description 25
- 239000000203 mixture Substances 0.000 abstract description 18
- 230000000996 additive effect Effects 0.000 abstract description 14
- 229910052814 silicon oxide Inorganic materials 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 68
- 238000009792 diffusion process Methods 0.000 description 13
- 238000001039 wet etching Methods 0.000 description 8
- -1 Fluorine carbides Chemical class 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
- 210000002381 plasma Anatomy 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 7
- 239000010703 silicon Substances 0.000 description 7
- 239000005380 borophosphosilicate glass Substances 0.000 description 6
- 125000006850 spacer group Chemical group 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 229910052731 fluorine Inorganic materials 0.000 description 5
- 239000011737 fluorine Substances 0.000 description 5
- 229920002120 photoresistant polymer Polymers 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 239000012159 carrier gas Substances 0.000 description 4
- 238000010494 dissociation reaction Methods 0.000 description 4
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- 229910004298 SiO 2 Inorganic materials 0.000 description 3
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- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 150000002221 fluorine Chemical class 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000011344 liquid material Substances 0.000 description 2
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- PWKWDCOTNGQLID-UHFFFAOYSA-N [N].[Ar] Chemical compound [N].[Ar] PWKWDCOTNGQLID-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
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- 229910052796 boron Inorganic materials 0.000 description 1
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- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76897—Formation of self-aligned vias or contact plugs, i.e. involving a lithographically uncritical step
-
- 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
-
- 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
- H01L21/31105—Etching inorganic layers
- H01L21/31111—Etching inorganic layers by chemical means
- H01L21/31116—Etching inorganic layers by chemical means by dry-etching
-
- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76802—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Drying Of Semiconductors (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Weting (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Formation Of Insulating Films (AREA)
Abstract
Description
Claims (19)
- 도핑된 이산화규소 위에 마스크 재료를 배치하는 단계,상기 마스크 재료를 패턴화(patterning)하여 소정의 도핑된 이산화규소 영역을 노출시키는 단계 및도핑되지 않은 이산화규소 위와 질화규소 위에 존재하는 도핑된 이산화규소에 선택적이며 화학식 C2HxFy의 성분을 포함하는 에칭제(여기서, x는 3 내지 5의 정수이고, y는 1 내지 3의 정수이며, x + y는 6이다)를 사용하여 상기 노출된 소정 영역을 건식 에칭하는 단계를 포함하는, 도핑된 이산화규소의 패턴화 방법.
- 제1항에 있어서, 상기 마스크 재료 배치 단계가, 광화상화 가능한 재료(photoimageable material)를 배치하는 단계를 포함하는 방법.
- 제2항에 있어서, 상기 패턴화가 광석판인쇄술(photolithography)을 포함하는 방법.
- 제1항에 있어서, 상기 마스크 재료 배치 단계가, 비광화상성(non-photoimageable) 재료를 배치하는 단계를 포함하는 방법.
- 제1항에 있어서, 도핑된 이산화규소 하부에 에칭 정지층(etch stop)을 제공하는 단계 및 노출된 소정 영역을 에칭 정지층까지 에칭시키는 단계를 포함하는 방법.
- 제5항에 있어서, 상기 에칭 정지층 제공 단계가, 도핑되지 않은 이산화규소를 포함하는 에칭 정지층을 제공하는 단계를 포함하는 방법.
- 제5항에 있어서, 상기 에칭 정지층 제공 단계가, 질화규소를 포함하는 에칭 정지층을 제공하는 단계를 포함하는 방법.
- 제1항에 있어서, 상기 건식 에칭 단계가, 반응성 이온 에칭, 플라즈마 에칭, 고밀도 플라즈마 에칭, 포인트 플라즈마 에칭, 자기성 이온 에칭, 자기 강화 반응성 이온 에칭, 플라즈마 강화 반응성 이온 에칭 및 전자 사이클로트론 공명으로 이루어진 그룹으로부터 선택된 기술을 사용하여 수행되는 방법.
- 제1항에 있어서, 상기 건식 에칭 단계가 반응성 이온 에칭을 포함하는 방법.
- 제1항에 있어서, 상기 건식 에칭 단계가 고 플라즈마 에칭을 포함하는 방법.
- 도핑된 이산화규소 구조물과, 인접한 도핑되지 않은 이산화규소 구조물의 적어도 일부를, 화학식 C2HxFy의 성분을 포함하는 에칭제(여기서, x는 3 내지 5의 정수이고, y는 1 내지 3의 정수이며, x + y는 6이다)에 노출시키는 단계 및상기 도핑되지 않은 이산화규소 구조물을 사실상 에칭시키지 않으면서 상기 에칭제를 사용하여 도핑된 이산화규소 층을 에칭하는 단계를 포함하는, 도핑된 이산화규소 구조물의 선택적인 에칭 방법.
- 제1항에 있어서, 상기 마스크 배치 단계가, 도핑된 이산화규소를 포함하는 패시베이션 층(passivation layer) 위에 상기 마스크를 배치하는 단계 및 복수의 트랜지스터 게이트 구조물 위에 놓는 단계를 포함하는 방법.
- 제12항에 있어서, 상기 건식 에칭 단계가 패시베이션 층을 통하여 하나 이상의 개구를 형성하는 단계를 포함하는 방법으로,상기 하나 이상의 개구가, 패시베이션층과 복수의 트랜지스터 게이트 구조물이 그 위에 배치되는 반도체 기판의 평면에 사실상 수직인 하나 이상의 측벽을 포함하며,상기 하나 이상의 측벽이, 복수의 트랜지스터 게이트 구조물의 하나 이상의 측벽 및 하나 이상의 캡과 경계를 이루며,상기 측벽 또는 상기 캡이, 도핑되지 않은 이산화규소 또는 질화 규소를 포함하는 것인 방법.
- 제13항에 있어서, 상기 하나 이상의 개구 형성 단계가, 상기 하나 이상의 측벽에 측면으로 인접한 영역에, 상기 반도체 기판의 캡, 측벽 및 활성 소자부 중 하나 이상의 영역을 측면으로 노출하는 단계를 포함하는 방법.
- 제1항 내지 제10항 및 제12항 내지 제14항 중 어느 한 항에 있어서, 상기 도핑된 이산화 규소의 소정의 노출 영역의 건조 에칭 단계가, 보로실리케이트 유리, 포스포실리케이트 유리 및 보로포스포실리케이트 유리의 하나 이상의 소정의 노출된 영역을 건식 에칭하는 단계를 포함하는 방법.
- 삭제
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Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US61004900A | 2000-07-05 | 2000-07-05 | |
US09/610,049 | 2000-07-05 | ||
PCT/US2001/041275 WO2002003439A2 (en) | 2000-07-05 | 2001-07-05 | Process for selectively etching doped silicon dioxide over undoped silicon dioxide and silicon nitride |
Publications (2)
Publication Number | Publication Date |
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KR20030038651A KR20030038651A (ko) | 2003-05-16 |
KR100750081B1 true KR100750081B1 (ko) | 2007-08-21 |
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Application Number | Title | Priority Date | Filing Date |
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KR1020037000043A KR100750081B1 (ko) | 2000-07-05 | 2001-07-05 | 도핑되지 않은 이산화규소와 질화규소 위의 도핑된이산화규소를 선택적으로 에칭시키는 방법 |
Country Status (8)
Country | Link |
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EP (1) | EP1297564B1 (ko) |
JP (1) | JP2004503082A (ko) |
KR (1) | KR100750081B1 (ko) |
CN (1) | CN1211841C (ko) |
AT (1) | ATE408896T1 (ko) |
AU (1) | AU2001278191A1 (ko) |
DE (1) | DE60135844D1 (ko) |
WO (1) | WO2002003439A2 (ko) |
Families Citing this family (4)
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DE10311691A1 (de) * | 2003-03-17 | 2004-10-07 | Infineon Technologies Ag | Herstellungsverfahren für eine Halbleiterstruktur |
US8778804B2 (en) * | 2009-01-30 | 2014-07-15 | Fei Company | High selectivity, low damage electron-beam delineation etch |
CN102945892B (zh) * | 2012-11-07 | 2015-08-05 | 南通大学 | 一种太阳能电池制造方法 |
US10217681B1 (en) | 2014-08-06 | 2019-02-26 | American Air Liquide, Inc. | Gases for low damage selective silicon nitride etching |
Citations (2)
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JPS61251138A (ja) * | 1985-04-30 | 1986-11-08 | Matsushita Electric Ind Co Ltd | ドライエツチング方法 |
WO1998049719A1 (en) * | 1997-04-30 | 1998-11-05 | Micron Technology, Inc. | Undoped silicon dioxide as etch stop for selective etch of doped silicon dioxide |
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DE3420347A1 (de) * | 1983-06-01 | 1984-12-06 | Hitachi, Ltd., Tokio/Tokyo | Gas und verfahren zum selektiven aetzen von siliciumnitrid |
US5562801A (en) * | 1994-04-28 | 1996-10-08 | Cypress Semiconductor Corporation | Method of etching an oxide layer |
US6066555A (en) * | 1995-12-22 | 2000-05-23 | Cypress Semiconductor Corporation | Method for eliminating lateral spacer erosion on enclosed contact topographies during RF sputter cleaning |
US5814563A (en) * | 1996-04-29 | 1998-09-29 | Applied Materials, Inc. | Method for etching dielectric using fluorohydrocarbon gas, NH3 -generating gas, and carbon-oxygen gas |
US6018184A (en) * | 1998-01-22 | 2000-01-25 | Micron Technology, Inc. | Semiconductor structure useful in a self-aligned contact having multiple insulation layers of non-uniform thickness |
US6117791A (en) * | 1998-06-22 | 2000-09-12 | Micron Technology, Inc. | Etchant with selectivity for doped silicon dioxide over undoped silicon dioxide and silicon nitride, processes which employ the etchant, and structures formed thereby |
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2001
- 2001-07-05 DE DE60135844T patent/DE60135844D1/de not_active Expired - Lifetime
- 2001-07-05 JP JP2002507425A patent/JP2004503082A/ja active Pending
- 2001-07-05 EP EP01956164A patent/EP1297564B1/en not_active Expired - Lifetime
- 2001-07-05 AT AT01956164T patent/ATE408896T1/de not_active IP Right Cessation
- 2001-07-05 CN CNB01812321XA patent/CN1211841C/zh not_active Expired - Lifetime
- 2001-07-05 AU AU2001278191A patent/AU2001278191A1/en not_active Abandoned
- 2001-07-05 WO PCT/US2001/041275 patent/WO2002003439A2/en active Application Filing
- 2001-07-05 KR KR1020037000043A patent/KR100750081B1/ko active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61251138A (ja) * | 1985-04-30 | 1986-11-08 | Matsushita Electric Ind Co Ltd | ドライエツチング方法 |
WO1998049719A1 (en) * | 1997-04-30 | 1998-11-05 | Micron Technology, Inc. | Undoped silicon dioxide as etch stop for selective etch of doped silicon dioxide |
Also Published As
Publication number | Publication date |
---|---|
WO2002003439A2 (en) | 2002-01-10 |
DE60135844D1 (de) | 2008-10-30 |
CN1211841C (zh) | 2005-07-20 |
WO2002003439A8 (en) | 2002-07-04 |
JP2004503082A (ja) | 2004-01-29 |
EP1297564A2 (en) | 2003-04-02 |
AU2001278191A1 (en) | 2002-01-14 |
WO2002003439A3 (en) | 2002-06-06 |
CN1451176A (zh) | 2003-10-22 |
KR20030038651A (ko) | 2003-05-16 |
EP1297564B1 (en) | 2008-09-17 |
ATE408896T1 (de) | 2008-10-15 |
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