JP6688763B2 - プラズマ処理方法 - Google Patents
プラズマ処理方法 Download PDFInfo
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- JP6688763B2 JP6688763B2 JP2017106733A JP2017106733A JP6688763B2 JP 6688763 B2 JP6688763 B2 JP 6688763B2 JP 2017106733 A JP2017106733 A JP 2017106733A JP 2017106733 A JP2017106733 A JP 2017106733A JP 6688763 B2 JP6688763 B2 JP 6688763B2
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- 238000003672 processing method Methods 0.000 title claims description 52
- 238000012545 processing Methods 0.000 claims description 94
- 239000000758 substrate Substances 0.000 claims description 94
- 239000007789 gas Substances 0.000 claims description 87
- 238000009832 plasma treatment Methods 0.000 claims description 85
- 238000000034 method Methods 0.000 claims description 51
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 8
- 239000001257 hydrogen Substances 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 4
- 239000010408 film Substances 0.000 description 63
- 230000008569 process Effects 0.000 description 42
- 238000009826 distribution Methods 0.000 description 19
- 238000005530 etching Methods 0.000 description 12
- 230000002093 peripheral effect Effects 0.000 description 12
- 239000000919 ceramic Substances 0.000 description 11
- 230000006870 function Effects 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 7
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052731 fluorine Inorganic materials 0.000 description 5
- 239000011737 fluorine Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000002048 anodisation reaction Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910000042 hydrogen bromide Inorganic materials 0.000 description 1
- 229910000039 hydrogen halide Inorganic materials 0.000 description 1
- 239000012433 hydrogen halide Substances 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Description
Claims (7)
- プラズマ処理装置を用いて実行されるプラズマ処理方法であって、
前記プラズマ処理装置は、
チャンバを提供するチャンバ本体と、
前記チャンバ内において基板を支持するよう構成されたステージと、
高周波電源と、
を備え、
前記ステージは、
前記高周波電源からの高周波を伝送する伝送路を提供する給電部と、
前記給電部上に設けられており、前記給電部に電気的に接続された導電性の基台、及び、前記基台上に設けられており、基板を静電引力により保持するよう構成されたチャック本体を有する静電チャックと、
を有し、
前記チャック本体は、
該チャック本体の中心軸線に直交する該チャック本体内の面上で分布するよう該チャック本体内に設けられた複数の第1のヒータと、
前記中心軸線に直交する該チャック本体内の別の面上で分布するよう複数の第2のヒータであり、該複数の第2のヒータの個数は前記複数の第1のヒータの個数よりも多い、該複数の第2のヒータと、
を有し、
前記プラズマ処理装置は、
第1の電源からの交流又は直流の出力により、前記複数の第1のヒータを駆動するように構成された第1のヒータコントローラと、
前記第1の電源からの前記出力の電力よりも低い電力を有する第2の電源からの交流又は直流の出力により、前記複数の第2のヒータを駆動するように構成された第2のヒータコントローラと、
を更に備え、
該プラズマ処理方法は、前記チャック本体上に前記基板が載置された状態で実行され、
前記チャンバ内において前記基板に第1のプラズマ処理を適用する工程と、
前記チャンバ内において前記基板に第2のプラズマ処理を適用する工程と、
を含み、
第2のプラズマ処理を適用する前記工程において前記高周波電源から前記基台に供給される前記高周波の電力は、第1のプラズマ処理を適用する前記工程において前記高周波電源から前記基台に供給される前記高周波の電力よりも大きく、
第1のプラズマ処理を適用する前記工程において、前記第1のヒータコントローラからの複数の第1の出力によって前記複数の第1のヒータが駆動され、前記第2のヒータコントローラからの複数の第2の出力によって前記複数の第2のヒータが駆動され、
第2のプラズマ処理を適用する前記工程において、少なくとも前記複数の第2のヒータの駆動が停止され、前記第2の電源と前記第2のヒータコントローラとの間の接続が遮断される、
プラズマ処理方法。 - 第2のプラズマ処理を適用する前記工程において、前記複数の第1のヒータの駆動が停止され、前記第1の電源と前記第1のヒータコントローラとの間の接続が遮断される、請求項1に記載のプラズマ処理方法。
- 前記基台は、該基台内に形成された流路であり熱交換媒体が供給される該流路を有し、
第2のプラズマ処理を適用する前記工程において、前記基板の温度は、前記基台の前記流路に前記熱交換媒体が供給されることにより制御される、請求項2に記載の方法。 - 第2のプラズマ処理を適用する前記工程において前記高周波電源から前記基台に供給される前記高周波の前記電力は、2000W以上である、請求項1に記載の方法。
- 前記基板は、酸化シリコンから形成された絶縁膜、該絶縁膜上に設けられた有機膜、該有機膜上に設けられたマスク膜、及び、該マスク膜上に設けられたレジストマスクを有し、
該プラズマ処理方法は、
第1のプラズマ処理を適用する前記工程と第2のプラズマ処理を適用する前記工程との間において、前記チャンバ内において前記基板に第3のプラズマ処理を適用する工程と、
第3のプラズマ処理を適用する前記工程と第2のプラズマ処理を適用する前記工程との間において、前記チャンバ内において前記基板に第4のプラズマ処理を適用する工程と、
を更に含み、
第1のプラズマ処理を適用する前記工程では、前記チャンバ内において生成される水素含有ガスのプラズマからの水素の活性種が前記レジストマスクに供給され、
第3のプラズマ処理を適用する前記工程では、前記複数の第1のヒータが駆動され、前記複数の第2のヒータが駆動され、前記チャンバ内において生成される処理ガスのプラズマからの活性種によって前記マスク膜がエッチングされ、
第4のプラズマ処理を適用する前記工程では、前記複数の第1のヒータが駆動され、前記複数の第2のヒータが駆動され、前記チャンバ内において生成される処理ガスのプラズマからの活性種によって前記有機膜がエッチングされ、
第2のプラズマ処理を適用する前記工程において前記高周波電源から前記基台に供給される前記高周波の前記電力は、第3のプラズマ処理を適用する前記工程において前記高周波電源から前記基台に供給される前記高周波の電力、及び、第4のプラズマ処理を適用する前記工程において前記高周波電源から前記基台に供給される前記高周波の電力よりも大きく、
第2のプラズマ処理を適用する前記工程では、前記チャンバ内において生成される処理ガスのプラズマからの活性種によって前記絶縁膜がエッチングされる、
請求項1〜4の何れか一項に記載の方法。 - 前記チャンバ内において前記基板に別のプラズマ処理を適用する工程を更に含み、
第2のプラズマ処理を適用する前記工程において前記高周波電源から前記基台に供給される前記高周波の電力は、第1のプラズマ処理を適用する前記工程において前記高周波電源から前記基台に供給される前記高周波の電力よりも大きく、
別のプラズマ処理を適用する前記工程において前記高周波電源から前記基台に供給される前記高周波の電力は、第2のプラズマ処理を適用する前記工程において前記高周波電源から前記基台に供給される前記高周波の前記電力よりも大きく、
第2のプラズマ処理を適用する前記工程において、前記複数の第1のヒータが駆動され、前記複数の第2のヒータの駆動が停止され、前記第2の電源と前記第2のヒータコントローラとの間の接続が遮断され、
別のプラズマ処理を適用する前記工程において、前記複数の第1のヒータの駆動が停止され、前記第1の電源と前記第1のヒータコントローラとの間の接続が遮断され、前記複数の第2のヒータの駆動が停止され、前記第2の電源と前記第2のヒータコントローラとの間の接続が遮断される、
請求項1に記載のプラズマ処理方法。 - 前記第1のヒータコントローラは、前記第1の電源からの前記出力である交流出力を分配することにより生成した交流の前記複数の第1の出力により、前記複数の第1のヒータを交流駆動するように構成されており、
前記第2のヒータコントローラは、前記第2の電源からの前記出力である直流出力を分配することにより生成した直流の前記複数の第2の出力により、前記複数の第2のヒータをそれぞれ直流駆動するように構成されている、
請求項1〜6の何れか一項に記載のプラズマ処理方法。
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