JP4724231B2 - 半導体装置およびその製造方法 - Google Patents
半導体装置およびその製造方法 Download PDFInfo
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- 238000005530 etching Methods 0.000 claims description 64
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- 239000010410 layer Substances 0.000 description 230
- 239000010408 film Substances 0.000 description 73
- 238000005229 chemical vapour deposition Methods 0.000 description 26
- 239000000758 substrate Substances 0.000 description 25
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 19
- 238000000151 deposition Methods 0.000 description 18
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- 239000000243 solution Substances 0.000 description 8
- 238000000231 atomic layer deposition Methods 0.000 description 7
- 238000001020 plasma etching Methods 0.000 description 7
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- 230000015572 biosynthetic process Effects 0.000 description 5
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- 229910052751 metal Inorganic materials 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
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- 238000002161 passivation Methods 0.000 description 4
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- 229910021332 silicide Inorganic materials 0.000 description 4
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- 238000006557 surface reaction Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 229910052732 germanium Inorganic materials 0.000 description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 3
- 230000003071 parasitic effect Effects 0.000 description 3
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- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 2
- 229910005898 GeSn Inorganic materials 0.000 description 1
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- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
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- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
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Description
図1は、本発明の第1の実施の形態にかかる半導体装置の上面図である。また、図2は、図1のA−A矢視断面図であり、図3は、図1のB−B断面図であり、図4は、図1のC−C断面図である。ここで、電流方向は<110>方向である。
次に、本実施の形態にかかる半導体装置の製造方法について説明する。図5−1〜図5−8は、本実施の形態にかかる半導体装置1の工程断面図である。
第2の実施の形態にかかる半導体装置は、第1の実施の形態にかかる半導体装置と構造が一部異なる。第2の実施の形態について、添付図面を参照して説明する。本実施の形態にかかる半導体装置の構成について、第1の実施の形態と異なる部分を説明する。他の部分については第1の実施の形態と同様であるので、同一の符号が付された箇所については、上述した説明を参照し、ここでの説明を省略する。
次に、本実施の形態にかかる半導体装置の製造方法について説明する。図8−1〜図8−5は、本実施の形態にかかる半導体装置21の工程断面図である。
第3の実施の形態にかかる半導体装置は、第1の実施の形態にかかる半導体装置においてPMISFETの構造をNMISFETと同じwire構造で形成している。第3の実施の形態について、添付図面を参照して説明する。本実施の形態にかかる半導体装置の構成について、第1の実施の形態と異なる部分を説明する。他の部分については第1の実施の形態と同様であるので、同一の符号が付された箇所については、上述した説明を参照し、ここでの説明を省略する。
次に、本実施の形態にかかる半導体装置の製造方法について説明する。図11−1〜図11−4は、本実施の形態にかかる半導体装置31の工程断面図である。
第4の実施の形態にかかる半導体装置は、第2の実施の形態にかかる半導体装置においてPMISFETの構造をNMISFETと同じwire構造で形成している。第4の実施の形態について、添付図面を参照して説明する。本実施の形態にかかる半導体装置の構成について、第2の実施の形態と異なる部分を説明する。他の部分については第2の実施の形態と同様であるので、同一の符号が付された箇所については、上述した説明を参照し、ここでの説明を省略する。
次に、本実施の形態にかかる半導体装置の製造方法について説明する。図14−1〜図14−5は、本実施の形態にかかる半導体装置41の工程断面図である。
2、22、32、42 PMISFET領域
3、23 NMISFET領域
4 シリコン基板
5 BOX層
6 GOI層
7 Si層
8 Ge層
9 ハードマスク層
10 ゲート絶縁膜
11 ゲート電極
12 ゲート側壁
13 PMISFETソース・ドレイン部
14 NMISFETソース・ドレイン部
15 Si窒化膜
Claims (7)
- チャネル電流が流れる<110>方向に対して垂直方向の断面が三角形状をしており、その2面が前記チャネル電流の流れる面となる(111)面で、残りの1面が(100)面である細線型Geと、
前記(100)面上に形成されたSi層またはSi1−xGex層(0<x<0.5)と、を備えたNMISFET領域を備えたこと、
を特徴とする半導体装置。 - 前記細線型Geを2つ備え、
前記Si層もしくは前記Si1−xGex層(0<x<0.5)の両面に前記細線型Geが備えられていること、
を特徴とする請求項1に記載の半導体装置。 - チャネル電流が流れる<110>方向に対して垂直方向の断面が四角形状をしており、対向する2面が前記チャネル電流の流れる(110)面で、残りの2面が(100)面であるFin型Geと、
前記(100)面の少なくとも1面上に形成されたSi層もしくはSi1−xGex層(0<x<0.5)と、を備えたPMISFET領域をさらに備えたこと、
を特徴とする請求項1または2に記載の半導体装置。 - 断面が三角形状をしており、その2面が前記チャネル電流の流れる(111)面で、残りの1面が(100)面である細線型Geと、
前記(100)面上に形成されたSi層またはSi1−xGex層(0<x<0.5)と、を備えたPMISFET領域をさらに備えたこと、
を特徴とする請求項1または2に記載の半導体装置。 - (100)表面を有するGe層またはGOI層上に、Si層またはSi1−xGex層(0<x<0.5)を形成する第1の形成工程と、
前記Ge層または前記GOI層、および、前記Si層または前記Si1−xGex層(0<x<0.5)をエッチングしてFin構造を形成する第1のエッチング工程と、
前記Si層または前記Si1−xGex層(0<x<0.5)をマスクとして、前記Ge層または前記GOI層が、<110>方向に対して垂直方向の断面が三角形状であり、その2面が(111)面となるように異方性エッチングする第2のエッチング工程と、を含むこと、
を特徴とする半導体装置の製造方法。 - 前記第1の形成工程後に、前記Si層または前記Si1−xGex層(0<x<0.5)上に前記Ge層または前記GOI層を形成する第2の形成工程と、前記第1の形成工程とを少なくとも1回繰り返すこと、
を特徴とする請求項5に記載の半導体装置の製造方法。 - 前記第2のエッチング工程の前後に、HFで洗浄する洗浄工程をさらに含むこと、を特徴とする請求項5または6に記載の半導体装置の製造方法。
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