JP7232901B2 - 半導体ウェハフィーチャを製作するための方法 - Google Patents
半導体ウェハフィーチャを製作するための方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 46
- 239000010409 thin film Substances 0.000 claims description 40
- 239000000758 substrate Substances 0.000 claims description 19
- 238000005530 etching Methods 0.000 claims description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 15
- 229910052710 silicon Inorganic materials 0.000 claims description 15
- 239000010703 silicon Substances 0.000 claims description 15
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- 238000005259 measurement Methods 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 4
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical group N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 3
- 238000005229 chemical vapour deposition Methods 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
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- 125000003821 2-(trimethylsilyl)ethoxymethyl group Chemical group [H]C([H])([H])[Si](C([H])([H])[H])(C([H])([H])[H])C([H])([H])C(OC([H])([H])[*])([H])[H] 0.000 description 1
- 238000009623 Bosch process Methods 0.000 description 1
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Description
Claims (11)
- 半導体ウェハの上面を識別するステップであって、
前記半導体ウェハの前記上面は、前記半導体ウェハの基板上に堆積されたハードマスクであるステップと、前記半導体ウェハの前記上面の第1の部分を選択深さまで垂直にエッチングして、前記半導体ウェハの前記上面の第2の部分から段差を形成するステップであり、前記段差は、前記半導体ウェハの前記上面の第2の部分よりも低い高さにある水平面と、前記半導体ウェハの前記上面の第2の部分から水平面まで延在する垂直側壁とを有する、ステップと、
前記段差の化学機械研磨(CMP)を行うステップと、
前記段差のCMPを行った後、前記段差の水平面及び垂直側壁にわたって選択された厚さの薄膜を均一に堆積するステップと、
前記段差の水平面および垂直側壁にわたって前記薄膜を均一に堆積させた後、前記段差の高さを低減するために、前記半導体ウェハの前記上面の第2の部分をCMPするステップと、
前記半導体ウェハの前記上面の第2の部分に対してCMPを実行して前記段差の高さを低減した後、前記ハードマスクの第1の部分および前記ハードマスクの第1の部分が堆積される前記半導体ウェハの基板の第1の部分を通して垂直エッチングすることによって、前記薄膜から前記半導体ウェハの前記上面の第2の部分を選択された深さまで垂直エッチングして、前記半導体ウェハのフィーチャとして、前記段差の垂直側壁にわたって堆積された前記薄膜を露出させるステップと、
を備え、前記フィーチャの寸法は、前記薄膜が堆積される選択厚さおよび前記半導体ウェハの前記上面の第2の部分が垂直にエッチングされる選択深さに従って制御されることを特徴とする方法。 - 請求項1に記載の方法であって、前記半導体ウェハはシリコンウェハであることを特徴とする方法。
- 請求項1に記載の方法であって、前記半導体ウェハの前記基板はシリコン基板であることを特徴とする方法。
- 請求項1に記載の方法であって、前記ハードマスクは窒化シリコンであることを特徴とする方法。
- 請求項1に記載の方法であって、前記半導体ウェハの前記上面の前記第1の部分は、ウェットエッチングを用いて垂直にエッチングされることを特徴とする方法。
- 請求項1に記載の方法であって、前記半導体ウェハの前記上面の前記第1の部分は、ドライエッチングを用いて垂直にエッチングされることを特徴とする方法。
- 請求項1に記載の方法であって、前記選択厚さの薄膜は、熱酸化によって、前記段差の前記垂直側壁にわたって一様に堆積されることを特徴とする方法。
- 請求項1に記載の方法であって、前記薄膜は、化学気相成長法によって、前記段差の前記垂直側壁にわたって制御された幅を有して一様に堆積されることを特徴とする方法。
- 請求項1に記載の方法であって、前記フィーチャは計測ツールの校正のために利用されることを特徴とする方法。
- 請求項1に記載の方法であって、前記フィーチャは複数の計測ツールの間での測定値整合のために利用されることを特徴とする方法。
- 請求項1に記載の方法であって、前記半導体ウェハの複数のフィーチャは、前記半導体ウェハの前記上面の異なる位置に対して、前記半導体ウェハの前記上面の前記第1の部分の前記垂直エッチングと、前記薄膜を均一に堆積することと、前記半導体ウェハの前記上面の前記第2の部分の前記垂直エッチングとを繰り返すことによって形成されることを特徴とする方法。
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US201862728664P | 2018-09-07 | 2018-09-07 | |
US62/728,664 | 2018-09-07 | ||
US16/184,898 US10796969B2 (en) | 2018-09-07 | 2018-11-08 | System and method for fabricating semiconductor wafer features having controlled dimensions |
US16/184,898 | 2018-11-08 | ||
PCT/US2019/049611 WO2020051258A1 (en) | 2018-09-07 | 2019-09-05 | System and method for fabricating semiconductor wafer features having controlled dimensions |
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JPWO2020051258A5 JPWO2020051258A5 (ja) | 2022-09-09 |
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US10796969B2 (en) | 2020-10-06 |
WO2020051258A1 (en) | 2020-03-12 |
US20200083122A1 (en) | 2020-03-12 |
CN112714947A (zh) | 2021-04-27 |
KR20210043000A (ko) | 2021-04-20 |
TW202016998A (zh) | 2020-05-01 |
EP3847688A4 (en) | 2022-06-15 |
JP2021536680A (ja) | 2021-12-27 |
EP3847688A1 (en) | 2021-07-14 |
TWI797351B (zh) | 2023-04-01 |
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