JP7018849B2 - 成膜方法及び成膜装置 - Google Patents
成膜方法及び成膜装置 Download PDFInfo
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- JP7018849B2 JP7018849B2 JP2018153701A JP2018153701A JP7018849B2 JP 7018849 B2 JP7018849 B2 JP 7018849B2 JP 2018153701 A JP2018153701 A JP 2018153701A JP 2018153701 A JP2018153701 A JP 2018153701A JP 7018849 B2 JP7018849 B2 JP 7018849B2
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- 238000000034 method Methods 0.000 title claims description 35
- 230000015572 biosynthetic process Effects 0.000 title claims description 11
- 239000007789 gas Substances 0.000 claims description 90
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 52
- 229910052710 silicon Inorganic materials 0.000 claims description 52
- 239000010703 silicon Substances 0.000 claims description 52
- 238000005530 etching Methods 0.000 claims description 45
- 239000000758 substrate Substances 0.000 claims description 33
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 6
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 6
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 6
- 229910052794 bromium Inorganic materials 0.000 claims description 6
- 239000011630 iodine Substances 0.000 claims description 6
- 229910052740 iodine Inorganic materials 0.000 claims description 6
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 5
- 229910000077 silane Inorganic materials 0.000 claims description 5
- PZPGRFITIJYNEJ-UHFFFAOYSA-N disilane Chemical compound [SiH3][SiH3] PZPGRFITIJYNEJ-UHFFFAOYSA-N 0.000 claims description 4
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 claims description 3
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 claims description 2
- 229910000042 hydrogen bromide Inorganic materials 0.000 claims 1
- 229910000043 hydrogen iodide Inorganic materials 0.000 claims 1
- 235000012431 wafers Nutrition 0.000 description 23
- 238000010438 heat treatment Methods 0.000 description 5
- 238000010926 purge Methods 0.000 description 4
- 229910021417 amorphous silicon Inorganic materials 0.000 description 3
- 230000003028 elevating effect Effects 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 239000011553 magnetic fluid Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- VEDJZFSRVVQBIL-UHFFFAOYSA-N trisilane Chemical compound [SiH3][SiH2][SiH3] VEDJZFSRVVQBIL-UHFFFAOYSA-N 0.000 description 1
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Description
本開示の一実施形態に係る成膜方法を実施することができる成膜装置について、多数枚の基板に対して一括で熱処理を行うバッチ式の縦型熱処理装置を例に挙げて説明する。但し、成膜装置は、縦型熱処理装置に限定されるものではなく、種々の装置であってよい。例えば、成膜装置は、基板を1枚ずつ処理する枚葉式の装置であってもよい。また、例えば処理容器内の回転テーブルの上に配置した複数枚の基板を回転テーブルにより公転させ、原料ガスが供給される領域と、原料ガスと反応する反応ガスが供給される領域とを順番に通過させて基板上に成膜するセミバッチ式の装置であってもよい。
本開示の一実施形態に係る成膜方法について、上記の成膜装置1により、表面に凹部を有する基板の上に所望の段差被覆性を有するアモルファスシリコン膜(以下「シリコン膜」という。)を成膜する場合を例に挙げて説明する。以下の成膜方法は、制御部95が成膜装置1の各部の動作を制御することにより実行される。図3は、成膜方法の一例を示すフローチャートである。図4は、成膜方法の一例を示す工程断面図である。
前述の一実施形態に係る成膜方法により、成膜工程S2とエッチング工程S3の繰り返し回数を0回、1回、2回に設定し、表面に凹部を有する基板の上にアモルファスシリコン膜を成膜した。そして、それぞれについて凹部に対するシリコン膜の段差被覆性を測定した。なお、繰り返し回数が0回とは、搬入工程S1と成膜工程S2とを行い、エッチング工程S3を行わなかった場合を意味する。
76 ガス供給管
78 ガス供給管
95 制御部
101 基板
102 凹部
102a 側壁
102b 底部
103 シリコン膜
Claims (10)
- 表面に凹部を有する基板の上に所望の段差被覆性を有するシリコン膜を成膜する成膜方法であって、
前記基板にシリコン含有ガスを供給し、前記凹部の側壁の下部よりも上部の膜厚が厚くなるようにシリコン膜を成膜する成膜工程と、
前記基板にエッチングガスを供給し、前記シリコン膜の一部をコンフォーマルにエッチングするエッチング工程と、
を有し、
前記成膜工程及び前記エッチング工程を前記段差被覆性に応じて定められる回数行う、
成膜方法。 - 前記成膜工程では、前記凹部が閉塞しないように前記シリコン膜を成膜する、
請求項1に記載の成膜方法。 - 前記エッチング工程では、前記凹部の側壁及び底部が露出しないように前記シリコン膜をエッチングする、
請求項1又は2に記載の成膜方法。 - 前記シリコン含有ガスは、分子式中に珪素を2つ以上含む高次シラン系ガスである、
請求項1乃至3のいずれか一項に記載の成膜方法。 - 前記高次シラン系ガスは、ジシランガスである、
請求項4に記載の成膜方法。 - 前記エッチングガスは、臭素含有ガス又はヨウ素含有ガスである、
請求項1乃至5のいずれか一項に記載の成膜方法。 - 前記臭素含有ガスは、臭化水素ガス又は臭素ガスであり、
前記ヨウ素含有ガスは、ヨウ化水素ガス又はヨウ素ガスである、
請求項6に記載の成膜方法。 - 前記凹部は、トレンチ又はホールである、
請求項1乃至7のいずれか一項に記載の成膜方法。 - 前記成膜工程及び前記エッチング工程を前記段差被覆性に応じて定められる回数行った後、更に前記成膜工程を行う、
請求項1乃至8のいずれか一項に記載の成膜方法。 - 表面に凹部を有する基板の上に所望の段差被覆性を有するシリコン膜を成膜する成膜装置であって、
前記基板を収容する処理容器と、
前記処理容器内にシリコン含有ガスを供給する成膜ガス供給部と、
前記処理容器内にエッチングガスを供給するエッチングガス供給部と、
制御部と、
を備え、
前記制御部は、
前記基板にシリコン含有ガスを供給し、前記凹部の側壁の下部よりも上部の膜厚が厚くなるようにシリコン膜を成膜する成膜工程と、
前記基板にエッチングガスを供給し、前記シリコン膜の一部をコンフォーマルにエッチングするエッチング工程と、
を前記段差被覆性に応じて定められる回数行う、
成膜装置。
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