JP2014039050A - パルス化したサンプルバイアスを用いる、半導体構造をエッチングするためのパルス化プラズマシステム - Google Patents
パルス化したサンプルバイアスを用いる、半導体構造をエッチングするためのパルス化プラズマシステム Download PDFInfo
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- 238000005259 measurement Methods 0.000 claims 1
- 238000001020 plasma etching Methods 0.000 abstract description 7
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 239000002245 particle Substances 0.000 description 10
- 229910052710 silicon Inorganic materials 0.000 description 10
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- 239000002184 metal Substances 0.000 description 5
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- 235000012239 silicon dioxide Nutrition 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 229910052581 Si3N4 Inorganic materials 0.000 description 4
- 239000002800 charge carrier Substances 0.000 description 4
- 239000002019 doping agent Substances 0.000 description 4
- 229910052732 germanium Inorganic materials 0.000 description 4
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- 239000012535 impurity Substances 0.000 description 4
- 238000009616 inductively coupled plasma Methods 0.000 description 4
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 4
- 229920002120 photoresistant polymer Polymers 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
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- 229910052782 aluminium Inorganic materials 0.000 description 3
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- 239000011365 complex material Substances 0.000 description 3
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- 229910052454 barium strontium titanate Inorganic materials 0.000 description 2
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 2
- 229910002113 barium titanate Inorganic materials 0.000 description 2
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- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000002939 deleterious effect Effects 0.000 description 2
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- HZXMRANICFIONG-UHFFFAOYSA-N gallium phosphide Chemical compound [Ga]#P HZXMRANICFIONG-UHFFFAOYSA-N 0.000 description 2
- 229910000449 hafnium oxide Inorganic materials 0.000 description 2
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- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
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- 229910052760 oxygen Inorganic materials 0.000 description 2
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000001846 repelling effect Effects 0.000 description 2
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910001936 tantalum oxide Inorganic materials 0.000 description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910002601 GaN Inorganic materials 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- GPXJNWSHGFTCBW-UHFFFAOYSA-N Indium phosphide Chemical compound [In]#P GPXJNWSHGFTCBW-UHFFFAOYSA-N 0.000 description 1
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- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- KXNLCSXBJCPWGL-UHFFFAOYSA-N [Ga].[As].[In] Chemical compound [Ga].[As].[In] KXNLCSXBJCPWGL-UHFFFAOYSA-N 0.000 description 1
- XWCMFHPRATWWFO-UHFFFAOYSA-N [O-2].[Ta+5].[Sc+3].[O-2].[O-2].[O-2] Chemical compound [O-2].[Ta+5].[Sc+3].[O-2].[O-2].[O-2] XWCMFHPRATWWFO-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- FTWRSWRBSVXQPI-UHFFFAOYSA-N alumanylidynearsane;gallanylidynearsane Chemical compound [As]#[Al].[As]#[Ga] FTWRSWRBSVXQPI-UHFFFAOYSA-N 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 150000001768 cations Chemical class 0.000 description 1
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- 238000004140 cleaning Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
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- 230000007423 decrease Effects 0.000 description 1
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- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- WPYVAWXEWQSOGY-UHFFFAOYSA-N indium antimonide Chemical compound [Sb]#[In] WPYVAWXEWQSOGY-UHFFFAOYSA-N 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 229910001925 ruthenium oxide Inorganic materials 0.000 description 1
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
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- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
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- 238000003860 storage Methods 0.000 description 1
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- 239000011593 sulfur Substances 0.000 description 1
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- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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- 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
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- 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
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Abstract
【解決手段】パルス化プラズマ・エッチング・プロセスは複数のデューティサイクルから成り、各デューティサイクルはプラズマのオン状態とオフ状態の組合せを表す。プラズマは反応ガスから生成され、反応ガスはプラズマのオン状態の間でなくオフ状態の間に補充される。別の実施形態では、サンプルの第1部分は連続プラズマ・エッチング・プロセスを適用して除去される。次に連続エッチング・プロセスは終了され、そしてサンプルの第2部分はパルス化したサンプルバイアスを用いるパルス化プラズマ・エッチング・プロセスを適用することにより除去される。
【選択図】図3
Description
Claims (23)
- サンプルのエッチング方法であって、
パルス化プラズマ・プロセスを適用することによって前記サンプルの一部を除去する工程を含み、この場合前記パルス化プラズマ・プロセスは複数のデューティサイクルから成り、前記オン状態の間に前記サンプルに負のバイアスを印加し、前記オフ状態の間に前記サンプルにゼロバイアスを印加する、方法。 - 前記負のバイアスが5−1000ワットである、請求項1に記載の方法。
- 前記オン状態の持続時間が、前記サンプルに隣接した反応領域におけるマイクロ・ローディングを実質的に阻止するのに十分に短く、且つ前記オフ状態の持続時間が、前記サンプルに隣接した前記反応領域からのエッチング副産物のセットの除去を実質的に可能にするのに十分に長い、請求項1に記載の方法。
- 前記エッチング副産物のセットの少なくとも一部が前記プラズマのオン状態の間に生成される、請求項3に記載の方法。
- 前記オン状態から成る各デューティサイクルの部分を5〜95%の範囲とする、請求項1に記載の方法。
- 各デューティサイクルの持続時間が5−1000マイクロ秒である、請求項2に記載の方法。
- 前記プラズマの前記オフ状態の持続時間を、前記反応領域からエッチング副産物の50%超が除去されるまでの時間と一致するように選択する、請求項3に記載の方法。
- 不活性ガスを使用して、前記プラズマの前記オフ状態の間に前記エッチング副産物のセットの除去を強化する、請求項3に記載の方法。
- サンプルのエッチング方法であって、
連続プラズマ・プロセスを適用することによって前記サンプルの第1部分を除去する工程と、
前記連続プラズマ・プロセスを終了する工程と、
パルス化プラズマ・プロセスを適用することによって前記サンプルの第2部分を除去する工程であって、前記パルス化プラズマ・プロセスが複数のデューティサイクルから成り、各デューティサイクルがプラズマのオン状態とオフ状態の組合せであり、前記オン状態の間に前記サンプルに負のバイアスを印加し、前記オフ状態の間に前記サンプルにゼロバイアスを印加する工程と
を含む方法。 - 前記負のバイアスが5−1000ワットである、請求項9に記載の方法。
- 前記オン状態の持続時間が、前記サンプルに隣接した反応領域におけるマイクロ・ローディングを実質的に阻止するのに十分に短く、且つ前記オフ状態の持続時間が、前記反応領域からのエッチング副産物のセットの除去を実質的に可能にするのに十分に長い、請求項9に記載の方法。
- 前記オン状態から成る各デューティサイクルの部分が5〜95%の範囲である、請求項11に記載の方法。
- 各デューティサイクルの持続時間が5−1000マイクロ秒である、請求項12に記載の方法。
- 前記連続エッチング・プロセスを終了する工程がエンドポイントを検出する工程を含む、請求項9に記載の方法。
- 前記エンドポイントを、前記連続エッチング・プロセスの間に生成される化学種のセットのリアルタイム組成により決定する、請求項14に記載の方法。
- 前記エンドポイントを、干渉分光法によるリアルタイム膜厚測定よって決定する、請求項14に記載の方法。
- 前記連続エッチング・プロセスを終了する工程が、前記サンプルの特徴に基づく所定の時間に終了することを含む、請求項9に記載の方法。
- 第2連続プラズマ・プロセスを適用することによって前記サンプルの第3部分を除去する工程と、
前記第2連続プラズマ・プロセスを終了する工程と、
第2パルス化プラズマ・プロセスを適用することによって前記サンプルの第4部分を除去する工程であって、前記第2パルス化プラズマ・プロセスが第2の複数のデューティサイクルから成り、各デューティサイクルが第2プラズマの第2オン状態と第2オフ状態の組合せであり、前記第2音状態の間に前記サンプルに負のバイアスを印加し、前記第2オフ状態の間に前記サンプルにゼロバイアスを印加する工程と
をさらに含む、請求項9に記載の方法。 - サンプルのエッチングに用いられるシステムであって、
サンプル・ホルダーを備えたチャンバと、
前記チャンバに連結する排出デバイスであって、前記チャンバを減圧するための排出デバイスと、
前記チャンバに連結するガス注入デバイスであって、前記チャンバに反応ガスを注入するためのガス注入デバイスと、
前記チャンバに連結するプラズマ・イグニション・デバイスであって、前記反応ガスから誘導されるプラズマに点火するためのプラズマ・イグニション・デバイスと、
前記サンプル・ホルダーに連結される電圧源であって、前記サンプルにバイアスを印加するための電圧源と、
前記プラズマ・イグニション・デバイスに連結するコンピューティング・デバイスであって、プロセッサ及びメモリを備え、この場合前記メモリは、パルス化プラズマ・プロセスにおいて前記プラズマ・イグニション・デバイスを制御することによりプラズマのオン状態とオフ状態の間を切り換えるための命令セットを含み、前記パルス化プラズマ・プロセスは複数のデューティサイクルから成り、各デューティサイクルは前記プラズマの1つのオン状態と1つのオフ状態の組合せであり、前記メモリは前記電圧源を制御することにより負のバイアスとゼロバイアスの間を切換えるための命令セットも含み、前記負のバイアスは前記オン状態の間に前記サンプルに印加され、前記ゼロバイアスは前記オフ状態の間に前記サンプルに印加されるコンピューティング・デバイスと
を備えるシステム。 - 前記負のバイアスが5−1000ワットである、請求項19に記載のシステム。
- 前記チャンバに連結する検出デバイスをさらに備え、前記検出デバイスが処理工程のエンドポイントを検出する、請求項19に記載のシステム。
- 前記オン状態の持続時間が、サンプルに隣接する反応領域においてマイクロ・ローディングを実質的に抑止するのに十分に短く、且つ前記オフ状態の持続時間が、前記サンプルに隣接する前記反応領域からのエッチング副産物のセットの除去を実質的に可能にするのに十分に長い、請求項19に記載のシステム。
- 前記オン状態から成る各デューティサイクルの部分が5〜95%の範囲である、請求項22に記載のシステム。
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KR101445299B1 (ko) | 2014-09-26 |
US20080197110A1 (en) | 2008-08-21 |
WO2008103456A8 (en) | 2009-10-15 |
US7718538B2 (en) | 2010-05-18 |
JP5774071B2 (ja) | 2015-09-02 |
WO2008103456A2 (en) | 2008-08-28 |
WO2008103456A3 (en) | 2008-10-23 |
JP2010519758A (ja) | 2010-06-03 |
CN101636822A (zh) | 2010-01-27 |
TW200845192A (en) | 2008-11-16 |
TWI458008B (zh) | 2014-10-21 |
KR20100014502A (ko) | 2010-02-10 |
CN101631897B (zh) | 2011-10-12 |
CN101631897A (zh) | 2010-01-20 |
JP5374388B2 (ja) | 2013-12-25 |
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