JP4219838B2 - 半導体基板の製造方法、並びに半導体装置の製造方法 - Google Patents
半導体基板の製造方法、並びに半導体装置の製造方法 Download PDFInfo
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- JP4219838B2 JP4219838B2 JP2004087914A JP2004087914A JP4219838B2 JP 4219838 B2 JP4219838 B2 JP 4219838B2 JP 2004087914 A JP2004087914 A JP 2004087914A JP 2004087914 A JP2004087914 A JP 2004087914A JP 4219838 B2 JP4219838 B2 JP 4219838B2
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Description
本発明の実施の一形態について図1ないし図4に基づいて説明すれば、以下の通りである。
Si-OH + Si-OH → Si-O-Si + H2O
の反応が生じ、上記両基板の接合が原子同士の強固な結合に変わるとともに、水素イオン注入部41にて水素が単結晶Si基板中で拡散し微小気泡を生じ、水素イオン注入部41を境に単結晶Siウエハ40の不要部分の劈開剥離を生じさせ、単結晶Siを薄膜化し薄膜単結晶Si40´を形成することができる。
本発明の実施の一形態について図5に基づいて説明すれば、以下の通りである。
Si-OH + Si-OH → Si-O-Si + H2O
の反応が生じ、上記両基板の接合が原子同士の強固な結合に変わるとともに、水素イオン注入部41にて水素が単結晶Siを拡散し微小気泡を生じ、水素イオン注入部41および42を境に単結晶Siウエハ40の不要部分の劈開剥離を生じさせ、単結晶Siを薄膜化して単結晶Si薄膜40´を形成することができる。
本発明の実施の一形態について図6に基づいて説明すれば、以下の通りである。
Si-OH + Si-OH → Si-O-Si + H2O
の反応が生じ、上記両基板の接合が原子同士の強固な結合に変わるとともに、水素イオン注入部41にて水素が単結晶Si中を拡散し微小気泡を生じ、水素イオン注入部41を境に単結晶Siウエハ40の不要部分の劈開剥離を生じさせ、単結晶Siを薄膜化して単結晶Si薄膜40´を形成することができる。以上の工程までを終了した状態が図6(c)に示されるものである。
20 非単結晶Si薄膜トランジスタ(非単結晶Si薄膜からなる薄膜トランジスタ)
21 非単結晶Si薄膜
30 結晶Si薄膜トランジスタ(単結晶Siからなる薄膜トランジスタ)
32 ゲート電極
34 多結晶Si膜(ゲート電極)
35 ゲート電極膜
36 SiO2膜(ゲート絶縁膜)
38 表面保護膜(SiO2膜)
39 絶縁膜
39’ 絶縁膜(平坦化用絶縁膜)
40’ 単結晶Si薄膜
50 絶縁基板
Claims (9)
- 単結晶Si基板上に、ゲート絶縁膜を介して、ゲート電極が形成された半導体基板の製造方法において、
上記ゲート電極を含むトランジスタとなる領域上に表面保護膜を形成する工程と、所定の濃度の水素イオン及び/またはHeイオンを、前記表面保護膜及び前記ゲート絶縁膜を通して単結晶Si基板に対し注入する工程とを含むと共に、
上記ゲート電極が形成されている領域では、水素イオン及び/またはHeイオンの飛程が、上記ゲート電極と上記表面保護膜との膜厚の合計以下となり、かつ、上記ゲート電極が形成されていない領域では、水素イオン及び/またはHeイオンの飛程が、上記表面保護膜と上記ゲート絶縁膜との膜厚の合計よりも大きくなるように、水素イオン及び/またはHeイオンの注入エネルギー、ゲート電極材料、および表面保護膜の膜厚の条件の組み合わせが設定されていることを特徴とする半導体基板の製造方法。 - 単結晶Si基板上に、ゲート絶縁膜を介して、ゲート電極が形成された半導体基板の製造方法において、
上記ゲート電極を含むトランジスタとなる領域上に表面保護膜を形成する工程と、所定の濃度の水素イオン及び/またはHeイオンを、前記表面保護膜及び前記ゲート絶縁膜を通して複数回単結晶Si基板に対し注入する工程とを備え、
前記水素イオン及び/またはHeイオンの注入工程には、
上記ゲート電極が形成されている領域では、水素イオン及び/またはHeイオンの飛程が、上記ゲート電極と上記表面保護膜との膜厚の合計以下となり、かつ、上記ゲート電極が形成されていない領域では、水素イオン及び/またはHeイオンの飛程が、上記表面保護膜と上記ゲート絶縁膜との膜厚の合計よりも大きくなるように、水素イオン及び/またはHeイオンの注入エネルギー、ゲート電極材料、および表面保護膜の膜厚の条件の組み合わせが決定されている第1の注入工程と、
前記第1の注入工程のイオン注入濃度より低い濃度での水素イオン及び/またはHeイオンの注入が行われると共に、上記ゲート電極が形成されている領域では、ゲート電極とゲート絶縁膜とを通過した水素イオン及び/またはHeイオンの注入ピーク位置が、前記第1の注入工程のイオン注入時に上記表面保護膜とゲート絶縁膜とを通して注入された水素イオン及び/またはHeイオンの注入ピーク位置と等しくなるように、注入エネルギーが設定されている第2の注入工程とを含むことを特徴とする半導体基板の製造方法。 - 単結晶Si基板上に、ゲート絶縁膜を介して、ゲート電極が形成された半導体基板の製造方法において、
上記ゲート電極を含むトランジスタとなる領域上に、上記ゲート電極の膜厚以上の平坦化用絶縁膜を形成し、上記平坦化用絶縁膜の平坦化後、さらに所定の濃度の水素イオン及び/またはHeイオンを、前記平坦化用絶縁膜及び前記ゲート絶縁膜を通して単結晶Si基板に対し注入する工程を含むと共に、
上記ゲート電極が形成されている領域では、水素イオン及び/またはHeイオンの飛程が、上記ゲート電極と上記平坦化用絶縁膜との膜厚の合計以下となり、かつ、上記ゲート電極が形成されていない領域では、水素イオン及び/またはHeイオンの飛程が、上記平坦化用絶縁膜と上記ゲート絶縁膜との膜厚の合計よりも大きくなるように、水素イオン及び/またはHeイオンの注入エネルギー、ゲート電極材料、および平坦化用絶縁膜の膜厚の条件の組み合わせが設定されていることを特徴とする半導体基板の製造方法。 - 上記平坦化絶縁膜が、TEOS、もしくはTMCTSを用いたプラズマCVDにより堆積されたSiO2からなることを特徴とする請求項3に記載の半導体基板の製造方法。
- 上記請求項1から4の何れかに記載の製造方法にて製造された半導体基板を所定の形状に切断する工程と、
切断された半導体基板と絶縁基板とを洗浄・活性化させる工程と、
上記半導体基板と上記絶縁基板とを密着させ接合する工程と、
熱処理を加えて、上記半導体基板における単結晶Si基板を、単結晶Si基板内における水素イオン及び/又はHeイオンの注入ピーク位置から劈開分離する事により上記半導体基板を薄膜化する工程とを含むことを特徴とする半導体装置の製造方法。 - 上記ゲート電極が、平均原子番号が28以上の元素、もしくは密度が10g/cm3以上の元素、あるいはその化合物を含む材料から構成されていることを特徴とする請求項1から3の何れかに記載の半導体基板の製造方法。
- 前記元素は、金属又は半金属であることを特徴とする請求項6に記載の半導体基板の製造方法。
- 上記ゲート電極が、タングステンあるいはタングステンシリサイドからなる層を含むことを特徴とする請求項1から3の何れかに記載の半導体基板の製造方法。
- 上記絶縁基板が、可視光波長域において透過性を有する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。
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US7119365B2 (en) * | 2002-03-26 | 2006-10-10 | Sharp Kabushiki Kaisha | Semiconductor device and manufacturing method thereof, SOI substrate and display device using the same, and manufacturing method of the SOI substrate |
JP2004014856A (ja) * | 2002-06-07 | 2004-01-15 | Sharp Corp | 半導体基板の製造方法及び半導体装置の製造方法 |
US7508034B2 (en) * | 2002-09-25 | 2009-03-24 | Sharp Kabushiki Kaisha | Single-crystal silicon substrate, SOI substrate, semiconductor device, display device, and manufacturing method of semiconductor device |
-
2004
- 2004-03-24 JP JP2004087914A patent/JP4219838B2/ja not_active Expired - Fee Related
-
2005
- 2005-03-23 KR KR1020050024000A patent/KR100725247B1/ko not_active IP Right Cessation
- 2005-03-23 TW TW094108970A patent/TWI258837B/zh not_active IP Right Cessation
- 2005-03-24 US US11/088,252 patent/US20050236626A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
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TWI258837B (en) | 2006-07-21 |
KR100725247B1 (ko) | 2007-06-07 |
US20050236626A1 (en) | 2005-10-27 |
JP2005277092A (ja) | 2005-10-06 |
KR20060044615A (ko) | 2006-05-16 |
TW200537647A (en) | 2005-11-16 |
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