JP4819894B2 - 基板に親水性トレンチをエッチングするのに適した方法 - Google Patents
基板に親水性トレンチをエッチングするのに適した方法 Download PDFInfo
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- JP4819894B2 JP4819894B2 JP2008525332A JP2008525332A JP4819894B2 JP 4819894 B2 JP4819894 B2 JP 4819894B2 JP 2008525332 A JP2008525332 A JP 2008525332A JP 2008525332 A JP2008525332 A JP 2008525332A JP 4819894 B2 JP4819894 B2 JP 4819894B2
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- 238000005530 etching Methods 0.000 title claims description 101
- 238000000034 method Methods 0.000 title claims description 78
- 239000000758 substrate Substances 0.000 title claims description 37
- 239000007789 gas Substances 0.000 claims description 76
- 238000002161 passivation Methods 0.000 claims description 44
- 229910052710 silicon Inorganic materials 0.000 claims description 20
- 239000010703 silicon Substances 0.000 claims description 20
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 19
- 239000002019 doping agent Substances 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 10
- 229920002120 photoresistant polymer Polymers 0.000 claims description 10
- 238000004544 sputter deposition Methods 0.000 claims description 10
- 229910018194 SF 6 Inorganic materials 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 7
- 239000005380 borophosphosilicate glass Substances 0.000 claims description 6
- 239000005388 borosilicate glass Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 239000005360 phosphosilicate glass Substances 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 238000001020 plasma etching Methods 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- WRECIMRULFAWHA-UHFFFAOYSA-N trimethyl borate Chemical compound COB(OC)OC WRECIMRULFAWHA-UHFFFAOYSA-N 0.000 claims description 4
- WVLBCYQITXONBZ-UHFFFAOYSA-N trimethyl phosphate Chemical compound COP(=O)(OC)OC WVLBCYQITXONBZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 description 10
- 238000000151 deposition Methods 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000000708 deep reactive-ion etching Methods 0.000 description 6
- 230000008021 deposition Effects 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 5
- 238000009623 Bosch process Methods 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- 229910052734 helium Inorganic materials 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000012159 carrier gas Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 238000009616 inductively coupled plasma Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- -1 silicon halides Chemical class 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- 238000004380 ashing Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
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- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
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- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- OJCDKHXKHLJDOT-UHFFFAOYSA-N fluoro hypofluorite;silicon Chemical compound [Si].FOF OJCDKHXKHLJDOT-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- AIFMYMZGQVTROK-UHFFFAOYSA-N silicon tetrabromide Chemical compound Br[Si](Br)(Br)Br AIFMYMZGQVTROK-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1601—Production of bubble jet print heads
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/14016—Structure of bubble jet print heads
- B41J2/14145—Structure of the manifold
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/1626—Manufacturing processes etching
- B41J2/1628—Manufacturing processes etching dry etching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/1631—Manufacturing processes photolithography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/164—Manufacturing processes thin film formation
- B41J2/1646—Manufacturing processes thin film formation thin film formation by sputtering
-
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Plasma & Fusion (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Drying Of Semiconductors (AREA)
- Micromachines (AREA)
Description
本発明は、基板をエッチングする方法に関し、親水性の側壁を有するディープ又は超ディープトレンチの形成に適している。本発明は、主として、複雑なエッチング手順又はエッチング後処理の使用を回避しながらも、シリコン基板に親水性トレンチ又はチャネルを提供するために開発された。
MEMS(微小電気機械システム)デバイスのマイクロエレクトロニクス産業に対する影響は、近年極めて大きくなってきている。実際に、MEMSはマイクロエレクトロニクスの中で最も急成長している分野の1つである。MEMSの成長は、シリコンをベースとするフォトリソグラフィがマイクロスケールの機械デバイス及び構造の製造にまで拡張されたことによって、かなりの程度まで可能になってきている。フォトリソグラフィ技術では、もちろん、マスクの下に見られるシリコン基板の正確なエッチングを可能にする信頼性のあるエッチング技法を利用する。
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第1の態様では、本発明は基板にトレンチをディープ反応性イオンエッチングする方法を提供し、前記方法は、エッチングガスプラズマを用いるエッチングプロセスと、パッシベーションガスプラズマを用いるパッシベーションプロセスとを含み、前記パッシベーションガスプラズマが親水化ドーパント(hydrophilizing dopant)を含む。
(i)滴噴出側とインク供給側とを有するウエハを準備するステップと、
(ii)前記ウエハの前記滴噴出側を部分的に貫通する複数のトレンチをエッチングするステップと、
(iii)前記トレンチをフォトレジストで充填するステップと、
(iv)リソグラフィによりマスクで覆うエッチング技法を用いて、前記ウエハの前記滴噴出側に、複数の対応するノズル、噴出アクチュエータ及び関連する駆動回路を形成するステップと、
(v)前記ウエハの前記インク供給側から前記フォトレジストまで複数の対応するインク供給チャネルをエッチングするステップと、
(vi)前記トレンチから前記フォトレジストを剥離してノズル入り口を形成し、それにより前記インク供給側と前記ノズルとの間に流体接続が提供されるステップとを含み、
前記インク供給チャネルが、上述のエッチング方法を用いてエッチングされる。
(a)100ミクロンを超える深さ、
(b)前記表面に対して実質的に垂直な側壁、及び
(c)50°未満の接触角を有する側壁の特徴を有する。
滴噴出側とインク供給側とを有する基板と、
前記基板の前記滴噴出側に形成された複数のノズル組立体であって、各々がインク入り口を有するノズル組立体と、
前記インク供給側に画定された複数のインク供給チャネルであって、各々が少なくとも1つのインク入り口と流体連通するインク供給チャネルと、を備え、
前記インク供給チャネルが、
(a)100ミクロンを超える深さ、
(b)基板のインク供給側によって画定される表面に対して実質的に垂直な側壁、及び
(c)50°未満の接触角を有する側壁の特徴を有する。
エッチングプラズマは通常、誘導結合プラズマエッチング反応器等のプラズマエッチング反応器内で生成される。プラズマエッチング反応器は当技術分野で公知であり、様々な供給源(たとえば、Surface Technology Systems,PLC)から市販されている。通常、エッチング反応器は、アルミニウム、ガラス又は石英から形成されているチャンバを備え、このチャンバは一対の平行電極板を含む。しかしながら、他のデザインの反応器も入手可能であり、本発明は任意のタイプのプラズマエッチング反応器での使用に適している。
SF6+e− → SxFy ++SxFy ・+F・+e− [1]
O2+e− → O++O・+e− [2]
O・+Si(s) → Si(s)−nO → SiOn(sf) [3]
SiOn(sf)+F・ → SiOn(sf)−F [4]
SiOn(sf)−nF → イオンエネルギー → SiFx(ads)+SiOxFy(ads) [5]
Si(s)+F・ → Si−nF [6]
Si−nF → イオンエネルギー → SiFx(ads) [7]
SiFx(ads) → SiFx(g) [8]
(i)エッチングガスプラズマを用いて基板にエッチングするステップであって、エッチングガスプラズマが、
(a)フッ素化エッチングガスと、
(b)不活性スパッタリングガスと、を含むステップと、
(ii)パッシベーションガスプラズマを用いて基板の露出表面をパッシベーションするステップであって、パッシベーションガスプラズマが、
(a)シリコン含有堆積ガスと、
(b)親水化ドーパントと、を含むステップと、
(iii)ステップ(i)及び(ii)を交互に繰り返すステップと、を含む。
エッチングはすべて、標準的な誘導結合プラズマDRIE反応器内で行う。この反応器は以下のように構成する。
ICP:1.9〜2.2MHz、最大2000W
バイアス:13.56MHz、最大1250W
下部電極:陽極酸化静電チャック(ESC)、最大1000W
チャンバ:陽極酸化、チャンバ容積1.4リットル
ポンプ:ターボ2リットル
冷却:裏面ヘリウム冷却
Claims (14)
- 基板にトレンチをエッチングして水性流体の供給チャネルを形成する方法であって、
エッチングガスプラズマを用いるエッチングプロセスと、酸素を含むパッシベーションガスプラズマを用いるパッシベーションプロセスとを含み、
前記基板がシリコン基板であり、
前記パッシベーションガスプラズマが親水化ドーパントを含み、
前記親水化ドーパントが、B2H6、PH3、ホウ酸トリメチル(TMB)、リン酸トリメチル(TMP)又はこれらの組合せからなる群から選択される化合物を含む方法。 - 前記エッチングガスプラズマがプラズマエッチング反応器内で生成され、前記基板が前記反応器内でエッチングされる、請求項1に記載の方法。
- 前記エッチングによりもたらされるトレンチ側壁が50°未満の接触角を有する、請求項1に記載の方法。
- 前記エッチングによりもたらされるトレンチ側壁が、リンケイ酸ガラス(PSG)、ホウケイ酸ガラス(BSG)、ホウリンケイ酸ガラス(BPSG)又はこれらの組合せを含む、請求項1に記載の方法。
- 前記トレンチが100ミクロンを超える深さを有する、請求項1に記載の方法。
- 複数のトレンチが前記基板に同時にエッチングされ、前記トレンチの位置が、前記基板上に配置されるマスク層によって画定される、請求項1に記載の方法。
- 前記マスク層が酸化物層又はフォトレジスト層である、請求項6に記載の方法。
- 基板:マスクの選択比が少なくとも30:1である、請求項7に記載の方法。
- エッチング速度が少なくとも4ミクロン/分である、請求項1に記載の方法。
- 同時のエッチング及びパッシベーションプロセスを含み、単一のエッチング及びパッシベーションガスプラズマが前記エッチングガスプラズマ及び前記パッシベーションガスプラズマを含む、請求項1に記載の方法。
- 前記エッチング及びパッシベーションガスプラズマが、
(a)酸素を含むパッシベーションガスと、
(b)不活性スパッタリングガスと、
(c)フッ素化エッチングガスと、
(d)親水化ドーパントと
を含む、請求項10に記載の方法。 - 前記不活性スパッタリングガスがアルゴンである、請求項11に記載の方法。
- 前記フッ素化エッチングガスが、SF6、NF3及びこれらの混合物からなる群から選択される、請求項11に記載の方法。
- エッチング及びパッシベーションプロセスを交互に含む、請求項1に記載の方法。
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US11/198,235 US7481943B2 (en) | 2005-08-08 | 2005-08-08 | Method suitable for etching hydrophillic trenches in a substrate |
US11/198,235 | 2005-08-08 | ||
PCT/AU2006/000995 WO2007016720A1 (en) | 2005-08-08 | 2006-07-17 | Method suitable for etching hydrophilic trenches in a substrate |
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JP2009505381A JP2009505381A (ja) | 2009-02-05 |
JP4819894B2 true JP4819894B2 (ja) | 2011-11-24 |
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US (2) | US7481943B2 (ja) |
JP (1) | JP4819894B2 (ja) |
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CA2675856C (en) * | 2007-03-12 | 2013-02-19 | Silverbrook Research Pty Ltd | Method of fabricating printhead having hydrophobic ink ejection face |
US9039908B2 (en) * | 2008-08-27 | 2015-05-26 | Applied Materials, Inc. | Post etch reactive plasma milling to smooth through substrate via sidewalls and other deeply etched features |
JP6184291B2 (ja) | 2013-10-22 | 2017-08-23 | キヤノン株式会社 | シリコン基板の加工方法 |
KR102496037B1 (ko) | 2016-01-20 | 2023-02-06 | 삼성전자주식회사 | 플라즈마 식각 방법 및 장치 |
US11666918B2 (en) | 2020-03-06 | 2023-06-06 | Funai Electric Co., Ltd. | Microfluidic chip, head, and dispensing device for dispensing fluids containing an acidic component |
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JPS63240027A (ja) * | 1987-03-27 | 1988-10-05 | Fujitsu Ltd | ドライエツチング方法 |
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US4782036A (en) * | 1986-08-29 | 1988-11-01 | Siemens Aktiengesellschaft | Process for producing a predetermined doping in side walls and bases of trenches etched into semiconductor substrates |
US4717448A (en) * | 1986-10-09 | 1988-01-05 | International Business Machines Corporation | Reactive ion etch chemistry for providing deep vertical trenches in semiconductor substrates |
EP0729175A1 (en) * | 1995-02-24 | 1996-08-28 | International Business Machines Corporation | Method for producing deep vertical structures in silicon substrates |
DE19706682C2 (de) * | 1997-02-20 | 1999-01-14 | Bosch Gmbh Robert | Anisotropes fluorbasiertes Plasmaätzverfahren für Silizium |
JP2002509808A (ja) * | 1998-01-15 | 2002-04-02 | キオニックス・インコーポレイテッド | 集積大面積ミクロ構造体およびミクロメカニカルデバイス |
EP1333474A3 (en) | 1999-08-18 | 2003-10-29 | Motorola, Inc. | A method for forming a deep trench in a semiconductor substrate |
US6439693B1 (en) * | 2000-05-04 | 2002-08-27 | Silverbrook Research Pty Ltd. | Thermal bend actuator |
US6653237B2 (en) * | 2001-06-27 | 2003-11-25 | Applied Materials, Inc. | High resist-selectivity etch for silicon trench etch applications |
US7098141B1 (en) * | 2003-03-03 | 2006-08-29 | Lam Research Corporation | Use of silicon containing gas for CD and profile feature enhancements of gate and shallow trench structures |
US7041226B2 (en) * | 2003-11-04 | 2006-05-09 | Lexmark International, Inc. | Methods for improving flow through fluidic channels |
US20050280674A1 (en) * | 2004-06-17 | 2005-12-22 | Mcreynolds Darrell L | Process for modifying the surface profile of an ink supply channel in a printhead |
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2005
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JPS63240027A (ja) * | 1987-03-27 | 1988-10-05 | Fujitsu Ltd | ドライエツチング方法 |
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US7481943B2 (en) | 2009-01-27 |
JP2009505381A (ja) | 2009-02-05 |
KR100918333B1 (ko) | 2009-09-22 |
WO2007016720A1 (en) | 2007-02-15 |
KR20080034197A (ko) | 2008-04-18 |
US20090095709A1 (en) | 2009-04-16 |
US20070030309A1 (en) | 2007-02-08 |
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