JP7319288B2 - Pecvdによるsiギャップ充填の方法 - Google Patents
Pecvdによるsiギャップ充填の方法 Download PDFInfo
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- JP7319288B2 JP7319288B2 JP2020546333A JP2020546333A JP7319288B2 JP 7319288 B2 JP7319288 B2 JP 7319288B2 JP 2020546333 A JP2020546333 A JP 2020546333A JP 2020546333 A JP2020546333 A JP 2020546333A JP 7319288 B2 JP7319288 B2 JP 7319288B2
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- amorphous silicon
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- 238000000034 method Methods 0.000 title claims description 95
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 title claims description 15
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 110
- 239000000758 substrate Substances 0.000 claims description 47
- 238000000151 deposition Methods 0.000 claims description 36
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 12
- 239000002243 precursor Substances 0.000 claims description 12
- 229910000077 silane Inorganic materials 0.000 claims description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- 238000005137 deposition process Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000001020 plasma etching Methods 0.000 claims description 6
- PZPGRFITIJYNEJ-UHFFFAOYSA-N disilane Chemical compound [SiH3][SiH3] PZPGRFITIJYNEJ-UHFFFAOYSA-N 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 description 20
- 230000008021 deposition Effects 0.000 description 12
- 230000009969 flowable effect Effects 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000011049 filling Methods 0.000 description 4
- 229910052814 silicon oxide Inorganic materials 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- 238000000231 atomic layer deposition Methods 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000010849 ion bombardment Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- VEDJZFSRVVQBIL-UHFFFAOYSA-N trisilane Chemical compound [SiH3][SiH2][SiH3] VEDJZFSRVVQBIL-UHFFFAOYSA-N 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
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Description
Claims (12)
- プロセスチャンバ内に配置された基板を、150℃から650℃の範囲の温度に加熱することと、
ケイ素含有前駆体を前記プロセスチャンバ内に流入させることと、
前記基板に形成されたフィーチャの底部上に第1のアモルファスシリコン層を堆積させ、前記基板の表面上に第2のアモルファスシリコン層を堆積させることであって、前記フィーチャの各側壁の第1の部分が、前記第1のアモルファスシリコン層と接触し、各側壁の第2の部分が、露出されるように、第1のアモルファスシリコン層および第2のアモルファスシリコン層を堆積させることと、
前記第2のアモルファスシリコン層を除去することと、
を含み、前記第1のアモルファスシリコン層および前記第2のアモルファスシリコン層が、プラズマ化学気相堆積プロセスによって堆積され、
前記プラズマ化学気相堆積プロセスのプラズマ出力密度が、0.14W/cm 2 から2.83W/cm 2 の範囲である、方法。 - 前記第1のアモルファスシリコン層上に第3のアモルファスシリコン層を堆積させ、前記基板の前記表面上に第4のアモルファスシリコン層を堆積させることを、さらに含む、請求項1に記載の方法。
- 前記第4のアモルファスシリコン層を除去することを、さらに含む、請求項2に記載の方法。
- 前記ケイ素含有前駆体が、シランまたはジシランを含む、請求項1に記載の方法。
- 前記基板が、200℃~550℃の範囲の温度に加熱され、前記プロセスチャンバ内にプラズマが形成される、請求項1に記載の方法。
- 堆積プロセスおよび除去プロセスが、単一のプロセスチャンバ内で実行される、請求項1に記載の方法。
- 前記単一のプロセスチャンバが、プラズマ化学気相堆積チャンバである、請求項6に記載の方法。
- 前記第2のアモルファスシリコン層を除去することが、プラズマエッチングプロセスを含む、請求項1に記載の方法。
- 前記プラズマエッチングプロセスが、エッチャントとして水素ガスを利用する、請求項8に記載の方法。
- 前記プラズマエッチングプロセスのプラズマ出力密度が、0.14W/cm2から2.83W/cm2の範囲である、請求項8に記載の方法。
- プロセスチャンバ内に配置された基板を、200℃から550℃の範囲の温度に加熱することと、
シランまたはジシランを前記プロセスチャンバ内に流入させることと、
前記プロセスチャンバ内にプラズマを形成することと、
前記基板に形成されたフィーチャの底部上に第1のアモルファスシリコン層を堆積させることと、
を含む方法であって、前記フィーチャが、1つ以上の側壁を有し、前記第1のアモルファスシリコン層が、前記フィーチャの各側壁の第1の部分と接触し、各側壁の第2の部分が露出され、プラズマ出力密度が、0.14W/cm 2 から2.83W/cm 2 の範囲である、方法。 - 基板に形成されたフィーチャの底部上に第1のアモルファスシリコン層を堆積させ、前記基板の表面上に第2のアモルファスシリコン層を堆積させることであって、前記フィーチャの各側壁の第1の部分が、前記第1のアモルファスシリコン層と接触し、各側壁の第2の部分が露出され、前記第1および前記第2のアモルファスシリコン層を堆積させることが、
プロセスチャンバ内に配置された前記基板を、150℃から650℃の範囲の温度に加熱することと、
シラン前駆体を前記プロセスチャンバ内に流入させることと、
を含む、第1および第2のアモルファスシリコン層を堆積させることと、
前記第2のアモルファスシリコン層を除去することと、
前記第1および前記第2のアモルファスシリコン層を堆積させることと、前記第2のアモルファスシリコン層を除去することとを、前記フィーチャがアモルファスシリコンで充填されるまで、繰り返すことと、
を含み、前記第1のアモルファスシリコン層および前記第2のアモルファスシリコン層が、プラズマ化学気相堆積プロセスによって堆積され、前記プラズマ化学気相堆積プロセスのプラズマ出力密度が、0.14W/cm 2 から2.83W/cm 2 の範囲である、方法。
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