JP2017208534A - 凹状フィーチャ内の膜のボトムアップ形成方法 - Google Patents
凹状フィーチャ内の膜のボトムアップ形成方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 79
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- 238000000151 deposition Methods 0.000 claims abstract description 31
- 238000003672 processing method Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 68
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- 239000002184 metal Substances 0.000 claims description 34
- 229910052751 metal Inorganic materials 0.000 claims description 34
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- 229910044991 metal oxide Inorganic materials 0.000 claims description 10
- 150000004706 metal oxides Chemical class 0.000 claims description 10
- 239000011261 inert gas Substances 0.000 claims description 8
- 238000010926 purge Methods 0.000 claims description 8
- 238000005229 chemical vapour deposition Methods 0.000 claims description 7
- 238000005240 physical vapour deposition Methods 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 238000004544 sputter deposition Methods 0.000 claims description 4
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- 239000010408 film Substances 0.000 description 56
- 230000008021 deposition Effects 0.000 description 20
- 238000005530 etching Methods 0.000 description 14
- 239000003989 dielectric material Substances 0.000 description 12
- ITWBWJFEJCHKSN-UHFFFAOYSA-N 1,4,7-triazonane Chemical compound C1CNCCNCCN1 ITWBWJFEJCHKSN-UHFFFAOYSA-N 0.000 description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 6
- 229910004541 SiN Inorganic materials 0.000 description 6
- 229910004298 SiO 2 Inorganic materials 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 6
- 229910010413 TiO 2 Inorganic materials 0.000 description 6
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 229910052732 germanium Inorganic materials 0.000 description 6
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 229910052814 silicon oxide Inorganic materials 0.000 description 6
- 238000000059 patterning Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001459 lithography Methods 0.000 description 3
- 229910052914 metal silicate Inorganic materials 0.000 description 3
- 150000004767 nitrides Chemical class 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001900 extreme ultraviolet lithography Methods 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- 239000002094 self assembled monolayer Substances 0.000 description 2
- 239000013545 self-assembled monolayer Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
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- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
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Abstract
【解決手段】基板処理方法は、第1層220及び第1層上の第2層202を含む基板200を提供するステップを有する第2層は、第2層を貫通して延在する凹状フィーチャ204を有する。また、基板上に非コンフォーマルマスク層208を堆積させるステップを有する。マスク層は凹状フィーチャの開口部にオーバーハングを有する。方法はさらに、前記オーバーハングの少なくとも一部を維持しながら、凹状フィーチャの底部203からマスク層を除去するステップと、凹状フィーチャの底部に膜212を選択的に堆積させるステップと、基板からマスク層のオーバーハングを除去するステップと、を含む。堆積させるステップは、膜が凹状フィーチャ内で所望の厚さを有するまで、少なくとも1回繰り返される。
【選択図】図2D
Description
この出願は、2016年4月12日に出願された米国仮特許出願第62/321,481号に関連し、その優先権を主張するものであり、その全内容は、参照によりここに組み込まれる。
Claims (20)
- 基板処理方法であって、
a)第1層及び該第1層の上の第2層を含む基板を提供するステップであって、前記第2層は、該第2層を貫通して延在する凹状フィーチャを有するステップと、
b)前記基板の上に非コンフォーマルなマスク層を堆積させるステップであって、前記マスク層は前記凹状フィーチャの開口部にオーバーハングを有するステップと、
c)前記開口部に前記オーバーハングの少なくとも一部を維持しながら、前記凹状フィーチャの底部から前記マスク層を除去するステップと、
d)前記凹状フィーチャの前記底部に膜を選択的に堆積させるステップと、
e)前記基板から前記マスク層のオーバーハングを除去するステップと、
を含む方法。 - 前記膜が前記凹状フィーチャ内で所望の厚さを有するまで、ステップb)〜e)を少なくとも1回繰り返すステップを、さらに含む請求項1に記載の方法。
- 前記凹状フィーチャが前記膜で少なくとも実質的に満たされるまで、ステップb)〜e)を繰り返すステップを、さらに含む請求項1に記載の方法。
- 前記第1層及び第2層が同じ材料を含む、請求項1に記載の方法。
- 前記第1層及び第2層が異なる材料を含む、請求項1に記載の方法。
- 前記非コンフォーマルなマスク層は、物理蒸着(PVD)又はスパッタリングによって堆積される、請求項1に記載の方法。
- 前記膜が、原子層堆積(ALD)を使用して堆積される、請求項1に記載の方法。
- 前記膜は金属酸化物の膜を含み、
前記金属酸化物は、原子層堆積(ALD)を用いて、
1)前記基板を含むプロセスチャンバ内に金属含有前駆体をパルシングするステップと、
2)前記プロセスチャンバを不活性ガスでパージするステップと、
3)前記プロセスチャンバ内に酸素含有前駆体をパルシングするステップと、
4)前記プロセスチャンバを不活性ガスでパージするステップと、
5)ステップ1)〜4)を少なくとも1回繰り返すステップと、
によって堆積される、請求項1に記載の方法。 - 基板処理方法であって、
a)第1層及び該第1層の上の第2層を含む基板を提供するステップであって、前記第2層は、該第2層を貫通して延在する凹状フィーチャを有するステップと、
b)前記凹状フィーチャの側壁部及び底部に膜をコンフォーマルに堆積させるステップと、
c)前記底部の上の前記膜を形成するために前記側壁部から前記膜を選択的に除去するステップと、
を備える方法。 - 前記膜が前記凹状フィーチャ内で所望の厚さを有するまで、ステップb)及びc)を少なくとも1回繰り返すステップを、さらに含む請求項1に記載の方法。
- 前記凹状フィーチャが前記膜で少なくとも実質的に満たされるまで、ステップb)及びc)を繰り返すステップを、さらに含む請求項9に記載の方法。
- 前記第1層及び第2層が同じ材料を含む、請求項9に記載の方法。
- 前記第1層及び第2層が異なる材料を含む、請求項9に記載の方法。
- 前記膜が、化学蒸着(CVD)又は原子層堆積(ALD)によって堆積される、請求項9に記載の方法。
- 基板処理方法であって、
a)第1層及び該第1層の上の第2層を含む基板を提供するステップであって、前記第2層は、該第2層を貫通して延在する凹状フィーチャを有するステップと、
b)膜で前記凹状フィーチャを満たすステップと、
c)前記凹状フィーチャの底部上の前記膜を形成するために側壁部から前記膜を選択的に除去するステップと、
を備える方法。 - 前記膜が前記凹状フィーチャ内で所望の厚さを有するまで、ステップb)及びc)を少なくとも1回繰り返すステップを、さらに含む請求項15に記載の方法。
- 前記凹状フィーチャが前記膜で少なくとも実質的に満たされるまで、ステップb)及びc)を少なくとも1回繰り返すステップを、さらに含む請求項15に記載の方法。
- 前記第1層及び第2層が同じ材料を含む、請求項15に記載の方法。
- 前記第1層及び第2層が異なる材料を含む、請求項15に記載の方法。
- 前記膜は、物理蒸着(PVD)、スパッタリング、又は、化学蒸着(CVD)によって堆積される、請求項15に記載の方法。
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