JP5404816B2 - 半導体デバイスの形成方法 - Google Patents
半導体デバイスの形成方法 Download PDFInfo
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- JP5404816B2 JP5404816B2 JP2011548637A JP2011548637A JP5404816B2 JP 5404816 B2 JP5404816 B2 JP 5404816B2 JP 2011548637 A JP2011548637 A JP 2011548637A JP 2011548637 A JP2011548637 A JP 2011548637A JP 5404816 B2 JP5404816 B2 JP 5404816B2
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- 239000004065 semiconductor Substances 0.000 title claims description 144
- 238000000034 method Methods 0.000 title claims description 57
- 239000002019 doping agent Substances 0.000 claims description 58
- 238000005530 etching Methods 0.000 claims description 51
- 239000000758 substrate Substances 0.000 claims description 44
- 238000005468 ion implantation Methods 0.000 claims description 21
- 229920002120 photoresistant polymer Polymers 0.000 claims description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 238000001020 plasma etching Methods 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 238000009966 trimming Methods 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 6
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 229910052785 arsenic Inorganic materials 0.000 claims description 5
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical group [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 4
- 238000000151 deposition Methods 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052732 germanium Inorganic materials 0.000 claims description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 3
- 229910052743 krypton Inorganic materials 0.000 claims description 3
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 229910052724 xenon Inorganic materials 0.000 claims description 3
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 3
- 238000000059 patterning Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 144
- 239000000463 material Substances 0.000 description 29
- 239000004020 conductor Substances 0.000 description 14
- 238000005229 chemical vapour deposition Methods 0.000 description 13
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 7
- 238000005137 deposition process Methods 0.000 description 6
- 229910004298 SiO 2 Inorganic materials 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 150000004767 nitrides Chemical class 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 238000000231 atomic layer deposition Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000001459 lithography Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 4
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 3
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 3
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- 238000002513 implantation Methods 0.000 description 3
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- 239000012212 insulator Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 2
- 229910000927 Ge alloy Inorganic materials 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- 229910000673 Indium arsenide Inorganic materials 0.000 description 2
- 239000000908 ammonium hydroxide Substances 0.000 description 2
- 238000001505 atmospheric-pressure chemical vapour deposition Methods 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
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- 150000001875 compounds Chemical class 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
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- RWRIWBAIICGTTQ-UHFFFAOYSA-N difluoromethane Chemical compound FCF RWRIWBAIICGTTQ-UHFFFAOYSA-N 0.000 description 2
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- RPQDHPTXJYYUPQ-UHFFFAOYSA-N indium arsenide Chemical compound [In]#[As] RPQDHPTXJYYUPQ-UHFFFAOYSA-N 0.000 description 2
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- LGPPATCNSOSOQH-UHFFFAOYSA-N 1,1,2,3,4,4-hexafluorobuta-1,3-diene Chemical compound FC(F)=C(F)C(F)=C(F)F LGPPATCNSOSOQH-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 229910007991 Si-N Inorganic materials 0.000 description 1
- 229910006294 Si—N Inorganic materials 0.000 description 1
- 229910002367 SrTiO Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
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- 238000000137 annealing Methods 0.000 description 1
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- 229910052796 boron Inorganic materials 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000000224 chemical solution deposition Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 229910021478 group 5 element Inorganic materials 0.000 description 1
- 229910000042 hydrogen bromide Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 238000000608 laser ablation Methods 0.000 description 1
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- -1 metal silicate Chemical compound 0.000 description 1
- 229910052914 metal silicate Inorganic materials 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000005546 reactive sputtering Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 229910021483 silicon-carbon alloy Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
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- H01L21/3213—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
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- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
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Description
2 埋め込み絶縁層
3 上部半導体層(SOI層)
4 誘電体層
5 基板
6 半導体含有層
7 マスク
7a 残りの部分
8、8a 開口
9 イオン注入
10 フィン構造
15 積層体
11 ドープされた部分
12 ドープされない部分
13 開口
100 エッチング・マスク
101 ゲート構造
105 ゲート導体
106 ソース/ドレイン領域
110 ゲート誘電体
Claims (24)
- 基板上に配置された半導体含有層上に複数個の開口を有するマスクを形成するステップと、
前記半導体含有層の第1部分にドーパントを導入するように角度付けしたイオン注入を行うステップであって、前記半導体含有層のうち前記ドーパントが存在しない残りの部分は、前記マスクの下側に第1領域を有し、前記複数個の開口内の隣合う前記ドーパントを含む第1部分の間に第2領域を有する、前記ステップと、
パターンを形成するように、前記半導体含有層のうち前記ドーパントが存在しない前記残りの部分に対して前記半導体含有層のうち前記ドーパントを含む第1部分を選択的に除去するステップと、
サブリソグラフィック寸法の幅を有するフィン構造を形成するように、前記パターンを前記基板に転写するステップと、
を含む半導体デバイスの形成方法。 - 前記マスクの複数個の開口のうち互いに隣接する開口は、最小構造寸法だけ離されている、請求項1に記載の方法。
- 前記基板は、埋め込み絶縁層上に設けられた上部半導体層を含む、請求項1又は請求項2に記載の方法。
- 前記半導体含有層は、シリコン含有層である、請求項1、2又は3に記載の方法。
- 前記半導体含有層は、アモルファスSi又は多結晶Siで構成される、請求項4に記載の方法。
- 前記ドーパントの進行方向に平行な面と前記基板の表面に垂直な面との間の交点において測定した前記角度付けしたイオン注入の角度は3度乃至75度である、請求項1乃至5のいずれか1項に記載の方法。
- 前記ドーパントは、砒素、リン、ゲルマニウム、キセノン、アルゴン、クリプトン若しくはこれらの組み合わせである、請求項1乃至6のいずれか1項に記載の方法。
- 前記第1部分は、1×1018原子/cm3乃至8×1021原子/cm3の範囲のドーパント濃度を有する、請求項1乃至7のいずれか1項に記載の方法。
- 前記残りの部分は、1×1018原子/cm3よりも少ないドーパント濃度を有する、請求項1乃至8のいずれか1項に記載の方法。
- 前記最小構造寸法は、30nm乃至200nmの範囲である、請求項2に記載の方法。
- 1×1018原子/cm3乃至8×1021原子/cm3の範囲のドーパント濃度を有する前記半導体含有層の前記第1部分は、前記マスクの側壁から3nm乃至20nmの範囲の寸法だけ前記マスクの下側に延びる延長領域を有する、請求項8に記載の方法。
- 前記半導体含有層のうち前記ドーパントが存在しない前記残りの部分に対して選択的に前記半導体含有層のうち前記ドーパントを含む第1部分を除去するステップは、前記第1部分を500の割合そして前記残りの部分を1の割合除去するエッチング選択性から、前記第1部分を5の割合そして前記残りの部分を1の割合除去するエッチング選択性に至る選択性を有する等方性エッチングを含む、請求項1乃至11のいずれか1項に記載の方法。
- 前記パターンを前記基板に転写するステップは、異方性エッチングを含む、請求項1乃至12のいずれか1項に記載の方法。
- 前記マスクをトリミングするステップを含む、請求項1乃至13のいずれか1項に記載の方法。
- 前記フィン構造は、15nm乃至30nmの範囲の幅を有する、請求項1乃至14のいずれか1項に記載の方法。
- 基板上に配置された半導体含有層上に複数個の開口を有するマスクを形成するステップであって、前記マスクの複数個の開口のうち互いに隣接する開口は、30nm乃至200nmの範囲の寸法だけ離されている、前記ステップと、
前記半導体含有層の第1部分に、1×1018原子/cm3乃至8×1021原子/cm3の範囲のドーパント濃度までドーパントを導入するように角度付けしたイオン注入を行うステップであって、前記半導体含有層のうち前記ドーパントが存在しない残りの部分は、前記マスクの下側に第1領域を有し、前記複数個の開口内の隣合う前記ドーパントを含む第1部分の間に第2領域を有する、前記ステップと、
5nm乃至100nmの範囲の幅の開口を有するエッチング・マスクを形成するように、前記半導体含有層の前記残りの部分に対して前記半導体含有層の前記ドーパントを含む第1部分を選択的に除去するステップと、
15nm乃至30nmの範囲の幅を有するフィン構造を形成するように、前記エッチング・マスクの前記開口のパターンを前記下側の基板に転写するステップと、
を含む半導体デバイスの形成方法。 - 前記半導体含有層は、アモルファスSi又は多結晶Siである、請求項16に記載の方法。
- 前記基板は、埋め込み絶縁層上に配置された半導体層を含む、請求項16又は請求項17に記載の方法。
- 前記ドーパントの進行方向に平行な面と前記基板の表面に垂直な面との間の交点において測定した前記角度付けしたイオン注入の角度は3度乃至75度である、請求項16乃至18のいずれか1項に記載の方法。
- 前記ドーパントは、砒素、リン、ゲルマニウム、キセノン、アルゴン、クリプトン若しくはこれらの組み合わせである、請求項16乃至19のいずれか1項に記載の方法。
- 前記マスクを形成するステップは、前記半導体含有層の上にフォトレジスト層を付着するステップと、前記フォトレジスト層をパターン化するステップと、前記フォトレジスト層を現像するステップとを含む、請求項16乃至20のいずれか1項に記載の方法。
- 前記フォトレジストで構成された前記マスクをトリミングするステップを含む、請求項21に記載の方法。
- 前記マスクをトリミングするステップは、O2/HBr/Arのプラズマ・ガスを使用する等方性の反応性イオン・エッチングを使用する、請求項22に記載の方法。
- 前記エッチング・マスクの前記パターンを前記基板に転写するステップは、異方性エッチングを使用する、請求項16乃至23のいずれか1項に記載の方法。
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