JP2013021192A - プラズマエッチング方法 - Google Patents
プラズマエッチング方法 Download PDFInfo
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- JP2013021192A JP2013021192A JP2011154175A JP2011154175A JP2013021192A JP 2013021192 A JP2013021192 A JP 2013021192A JP 2011154175 A JP2011154175 A JP 2011154175A JP 2011154175 A JP2011154175 A JP 2011154175A JP 2013021192 A JP2013021192 A JP 2013021192A
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- 238000000034 method Methods 0.000 title claims abstract description 75
- 238000001020 plasma etching Methods 0.000 title claims abstract description 71
- 238000005530 etching Methods 0.000 claims abstract description 58
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 56
- 239000010703 silicon Substances 0.000 claims abstract description 56
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 53
- 230000001681 protective effect Effects 0.000 claims abstract description 39
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 37
- 238000000151 deposition Methods 0.000 claims abstract description 26
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 24
- 239000000758 substrate Substances 0.000 claims abstract description 24
- 230000008021 deposition Effects 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims description 154
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims 1
- 229910001882 dioxygen Inorganic materials 0.000 claims 1
- 239000010410 layer Substances 0.000 description 49
- 239000004065 semiconductor Substances 0.000 description 12
- 238000004380 ashing Methods 0.000 description 8
- -1 fluorine radicals Chemical class 0.000 description 8
- 150000001723 carbon free-radicals Chemical class 0.000 description 7
- 230000001678 irradiating effect Effects 0.000 description 7
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 6
- 229910052581 Si3N4 Inorganic materials 0.000 description 6
- 230000007547 defect Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 6
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 125000001153 fluoro group Chemical group F* 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 239000011229 interlayer Substances 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 230000036961 partial effect Effects 0.000 description 4
- 150000003254 radicals Chemical class 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 3
- 238000013459 approach Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 150000002222 fluorine compounds Chemical class 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-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
- 229910003481 amorphous carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 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
- 239000004642 Polyimide Substances 0.000 description 1
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 229910018540 Si C Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000015654 memory Effects 0.000 description 1
- 229910052751 metal Inorganic materials 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
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
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- 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
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Abstract
【解決手段】上方にパターニングされたシリコン酸化膜が形成されてなる被処理基板におけるシリコン層を第1の処理ガスによりエッチングして穴部を形成するプラズマエッチング方法において、一酸化炭素ガスを含む第2の処理ガスによりシリコン酸化膜の表面に保護膜を堆積させる第1の堆積ステップS11と、第1の処理ガスによりシリコン層をエッチングする第1のエッチングステップS12と、穴部の側壁に第2の処理ガスにより保護膜を堆積させる第2の堆積ステップS13と、第1の処理ガスによりシリコン層を更にエッチングする第2のエッチングステップS14とを有し、第2の堆積ステップS13と第2のエッチングステップS14とを少なくとも2回ずつ交互に繰り返す。
【選択図】図5
Description
(第1の実施の形態)
始めに、本発明の第1の実施の形態に係るプラズマエッチング方法について説明する。
4F*+Si→SiF4 (1)
に示すように、フッ素ラジカルF*がSiと反応することによってSiF4が生成される。そして、生成されたSiF4が排出されることにより、シリコン層51がエッチングされる。
(第2の実施の形態)
次に、本発明の第2の実施の形態に係るプラズマエッチング方法について説明する。
2 サセプタ
4 支持部
15 第1の高周波電源
20 シャワーヘッド
23 処理ガス供給系
26 第2の高周波電源
35 SF6ガス源
36 O2ガス源
38 COガス源
40 制御部
51 基体(シリコン層)
51a 穴部
51b 側壁
52 第1のマスク膜
53 第2のマスク膜
54 レジスト膜
55 保護膜
Claims (6)
- シリコン層よりなるとともに、前記シリコン層の上方に所定のパターンにパターニングされたシリコン酸化膜が形成されてなる被処理基板における前記シリコン層を、前記シリコン酸化膜をマスクとして、第1の処理ガスのプラズマによりエッチングして穴部を形成するプラズマエッチング方法において、
一酸化炭素ガスを含む第2の処理ガスのプラズマにより、前記シリコン酸化膜の表面に保護膜を堆積させる第1の堆積ステップと、
表面に前記保護膜が堆積された前記シリコン酸化膜をマスクとして、前記第1の処理ガスのプラズマにより前記シリコン層をエッチングする第1のエッチングステップと、
前記第1のエッチングステップの後、形成された前記穴部の側壁に、前記第2の処理ガスのプラズマにより前記保護膜を堆積させる第2の堆積ステップと、
表面に前記保護膜が堆積された前記シリコン酸化膜をマスクとして、前記第1の処理ガスのプラズマにより前記シリコン層を更にエッチングする第2のエッチングステップと
を有し、
前記第2の堆積ステップと前記第2のエッチングステップとを少なくとも2回ずつ交互に繰り返す、プラズマエッチング方法。 - 前記第2の堆積ステップは、形成された前記穴部の底まで、前記穴部の側壁に前記保護膜を堆積させるものである、請求項1に記載のプラズマエッチング方法。
- 前記被処理基板は、前記シリコン酸化膜上にレジスト膜が形成されてなるものであり、
前記第1の堆積ステップは、前記第2の処理ガスのプラズマにより前記レジスト膜を除去するとともに、前記第2の処理ガスのプラズマにより前記シリコン酸化膜の表面に前記保護膜を堆積させるものである、請求項1又は請求項2に記載のプラズマエッチング方法。 - 前記第1の堆積ステップは、酸素ガスを含む第3の処理ガスのプラズマにより、前記レジスト膜を灰化した後、残った前記レジスト膜を前記第2の処理ガスのプラズマにより除去するものである、請求項3に記載のプラズマエッチング方法。
- 前記第1のエッチングステップは、前記被処理基板を支持する支持部に、第1の周波数を有する第1の高周波電力を供給するとともに、供給する前記第1の高周波電力の電力を段階的に増加させながら、前記シリコン層をエッチングするものである、請求項1から請求項4のいずれかに記載のプラズマエッチング方法。
- 前記第2のエッチングステップを前記第2の堆積ステップと交互に繰り返す度に、前記第2のエッチングステップにおいて供給する前記第1の高周波電力の電力を増加させる、請求項1から請求項5のいずれかに記載のプラズマエッチング方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2011154175A JP5981106B2 (ja) | 2011-07-12 | 2011-07-12 | プラズマエッチング方法 |
US14/131,704 US8975188B2 (en) | 2011-07-12 | 2012-07-10 | Plasma etching method |
KR1020147000518A KR101904576B1 (ko) | 2011-07-12 | 2012-07-10 | 플라즈마 에칭 방법 |
PCT/JP2012/067612 WO2013008824A1 (ja) | 2011-07-12 | 2012-07-10 | プラズマエッチング方法 |
TW101124952A TWI459465B (zh) | 2011-07-12 | 2012-07-11 | 電漿蝕刻方法 |
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JP2011154175A JP5981106B2 (ja) | 2011-07-12 | 2011-07-12 | プラズマエッチング方法 |
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JP2013021192A true JP2013021192A (ja) | 2013-01-31 |
JP5981106B2 JP5981106B2 (ja) | 2016-08-31 |
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US (1) | US8975188B2 (ja) |
JP (1) | JP5981106B2 (ja) |
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WO (1) | WO2013008824A1 (ja) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20150033570A (ko) * | 2013-09-24 | 2015-04-01 | 도쿄엘렉트론가부시키가이샤 | 피처리체를 플라즈마 처리하는 방법 |
KR20150072342A (ko) * | 2013-12-19 | 2015-06-29 | 도쿄엘렉트론가부시키가이샤 | 반도체 장치의 제조 방법 |
KR20170018817A (ko) * | 2014-06-16 | 2017-02-20 | 도쿄엘렉트론가부시키가이샤 | 기판 처리 시스템 및 기판 처리 방법 |
KR20170092645A (ko) * | 2014-12-04 | 2017-08-11 | 베이징 나우라 마이크로일렉트로닉스 이큅먼트 씨오., 엘티디. | 실리콘 다이옥사이드 기판의 식각 방법 및 식각 장치 |
JP2018166223A (ja) * | 2014-06-16 | 2018-10-25 | 東京エレクトロン株式会社 | 処理方法 |
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US10297459B2 (en) | 2013-09-20 | 2019-05-21 | Lam Research Corporation | Technique to deposit sidewall passivation for high aspect ratio cylinder etch |
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KR101904576B1 (ko) | 2018-10-04 |
JP5981106B2 (ja) | 2016-08-31 |
TWI459465B (zh) | 2014-11-01 |
US20140134846A1 (en) | 2014-05-15 |
WO2013008824A1 (ja) | 2013-01-17 |
KR20140050627A (ko) | 2014-04-29 |
US8975188B2 (en) | 2015-03-10 |
TW201316408A (zh) | 2013-04-16 |
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