JP2006351694A - 半導体装置およびその製造方法 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims description 63
- 238000004519 manufacturing process Methods 0.000 title claims description 33
- 238000002955 isolation Methods 0.000 claims abstract description 85
- 238000000034 method Methods 0.000 claims abstract description 37
- 230000008569 process Effects 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 7
- REJKHFAZHZLNOP-UHFFFAOYSA-N (tert-butylamino)silicon Chemical compound CC(C)(C)N[Si] REJKHFAZHZLNOP-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000000758 substrate Substances 0.000 claims description 62
- 229910052710 silicon Inorganic materials 0.000 claims description 57
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 56
- 239000010703 silicon Substances 0.000 claims description 56
- 229910000577 Silicon-germanium Inorganic materials 0.000 claims description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 19
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 18
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 18
- 238000004518 low pressure chemical vapour deposition Methods 0.000 claims description 15
- CGRVKSPUKAFTBN-UHFFFAOYSA-N N-silylbutan-1-amine Chemical compound CCCCN[SiH3] CGRVKSPUKAFTBN-UHFFFAOYSA-N 0.000 claims description 10
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 9
- 238000000151 deposition Methods 0.000 claims description 9
- 238000010306 acid treatment Methods 0.000 claims description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 238000001039 wet etching Methods 0.000 claims description 4
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- 238000002230 thermal chemical vapour deposition Methods 0.000 claims description 3
- 230000000452 restraining effect Effects 0.000 abstract 1
- 239000013078 crystal Substances 0.000 description 16
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 10
- 229920005591 polysilicon Polymers 0.000 description 10
- 238000005530 etching Methods 0.000 description 9
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000006061 abrasive grain Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- VYIRVGYSUZPNLF-UHFFFAOYSA-N n-(tert-butylamino)silyl-2-methylpropan-2-amine Chemical compound CC(C)(C)N[SiH2]NC(C)(C)C VYIRVGYSUZPNLF-UHFFFAOYSA-N 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910021332 silicide Inorganic materials 0.000 description 2
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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Abstract
【解決手段】 素子分離溝の少なくとも上部を、ビスターシャリブチルアミノシランを原料とした減圧CVD法により形成されたSiOCNあるいはSiCNよりなるHF耐性膜で充填する。
【選択図】 図8
Description
図6(A)〜図8(F)は、本発明の第1の実施形態による半導体装置の製造工程を示す。
[第2の実施形態]
図12(A)〜図13(F)は、本発明の第2の実施形態による半導体装置の製造方法を示す。ただし図中、先に説明した部分に対応する部分には同一の参照符号を付し、説明を省略する。
[第3の実施形態]
図16(A)〜17(D)は、本発明の第3の実施形態による半導体装置の製造工程を示す。ただし図中、先に説明した部分には同一の参照符号を付し、説明を省略する。
[第4の実施形態]
図18(A),(B)は、本発明の第4の実施形態による半導体装置の製造工程を示す。ただし図中、先に説明した部分に対応する部分には同一の参照符号を付し、説明を省略する。
[第5の実施形態]
図19(A),(B)は、本発明の第5の実施形態による半導体装置の製造工程を示す。ただし図中、先に説明した部分に対応する部分には同一の参照符号を付し、説明を省略する。
シリコン基板上に、素子領域を画成するように形成されたSTI構造の素子分離領域を有する半導体装置であって、前記素子分離領域は、
前記シリコン基板中に形成された素子分離溝と、
前記素子分離溝を充填する素子分離絶縁膜と
を含み、
前記素子分離絶縁膜の少なくとも表面部分は、HF耐性膜より構成されていることを特徴とする半導体装置。
前記前記素子分離絶縁膜は、前記HF耐性膜と、前記HF耐性膜の下のシリコン酸化膜とよりなることを特徴とする付記1記載の半導体装置。
前記HF耐性膜は、前記素子分離溝を底部から上部まで充填することを特徴とする付記1記載の半導体装置。
前記HF耐性膜はSiOCN膜よりなり、1.670以上の屈折率を有することを特徴とする付記1〜3のうち、いずれか一項記載の半導体装置。
前記HF耐性膜は、熱燐酸処理に対し、熱CVD法で形成されたSiN膜に等しい、あるいはより大きな耐性を示すことを特徴とする付記1〜6のうち、いずれか一項記載の半導体装置。
前記素子領域には、pチャネルMOSトランジスタが形成され、前記pチャネルMOSトランジスタは、ソースおよびドレイン領域に、前記シリコン基板に対してエピタキシャルに形成されたp型SiGe領域を含むことを特徴とする付記1〜5のうち、いずれか一項記載の半導体装置。
さらに前記素子分離溝の表面に沿って、SiOCN膜またはSiOC膜よりなり、引張り応力を蓄積した引張り応力膜が形成されていることを特徴とする付記1〜5のうち、いずれか一項記載の半導体装置。
前記素子領域には、nチャネルMOSトランジスタが形成されており、前記nチャネルMOSトランジスタは、そのゲート電極を覆うように形成され引張り応力を蓄積した応力膜を有することを特徴とする付記7記載の半導体装置。
シリコン基板上に、SiNパターンをマスクに素子分離溝を形成する工程と、
前記素子分離溝の少なくとも上部を充填するように、また前記SiNパターンを覆うように、HF耐性膜を堆積する工程と、
前記SiNパターン、および前記SiNパターン上のHF耐性膜を除去する工程と、を含む半導体装置の製造方法であって、
前記HF耐性膜は、ビスターシャリーブチルアミノシランを原料とする減圧CVD法により形成されることを特徴とする半導体装置の製造方法。
前記減圧CVD法は、前記ビスターシャリーブチルアミノシランを酸素またはN2Oと反応させてSiOCN膜を、前記HF耐性膜として形成することを特徴とする付記9記載の半導体装置の製造方法。
前記減圧CVD法は、100Pa以下のプロセス圧の下で実行されることを特徴とする付記10記載の半導体装置の製造方法。
前記減圧CVD法は、前記ビスターシャリーブチルアミノシランをアンモニアと反応させてSiCN膜を、前記HF耐性膜として形成することを特徴とする付記9記載の半導体装置の製造方法。
前記減圧CVD法は、前記HF耐性膜が前記素子分離溝を底部から上部まで充填するように実行されることを特徴とする付記9〜12のうち、いずれか一項記載の半導体装置の製造方法。
前記素子分離溝を形成する工程の後、かつ前記HF耐性膜を堆積する工程の前に、前記素子分離溝の上部を残し底部をシリコン酸化膜により充填する工程と、をさらに含み、
前記HF耐性膜を堆積する工程は、前記HF耐性膜が、前記素子分離溝中において前記シリコン酸化膜を覆い、かつ前記素子分離溝上部を充填するように実行され、
前記SiNパターンおよびHF耐性膜を除去する工程は、前記HF耐性膜上に、前記素子分離溝に対応して形成されたシリコン酸化膜パターンをマスクに、ウェットエッチングにより実行されることを特徴とする付記9〜13のうち、いずれか一項記載の半導体装置の製造方法。
前記シリコン酸化膜を前記素子分離溝の底部に充填する工程は、前記素子分離溝を形成する工程の後、かつ前記HF耐性膜を堆積する工程の前に、前記素子分離溝を前記底部から前記上部まで充填するように、シリコン酸化膜を堆積する工程と、前記シリコン酸化膜のうち、前記素子分離溝上部を充填する部分を除去する工程と、よりなることを特徴とする付記14記載の半導体装置の製造方法。
11SP,11bP p型ソース・ドレイン領域
11SPb,11DPb p型ソース・ドレインバッファ領域
12 ゲート絶縁膜
13P p型ポリシリコンゲート電極
13Ox ゲート側壁酸化膜
13WN ゲート側壁絶縁膜
14A,14B SiGeエピタキシャル層
14C 多結晶SiGe層
20 シリコン基板
20A 素子領域
20B 素子分離溝
21 犠牲酸化膜
21A 熱酸化膜
21B CVD埋め込み酸化膜
21C 引張り応力膜
22 SiNパターン
23 HF耐性膜
24 CVD酸化膜
41a,41b p型ソース・ドレインエクステンション領域
41c,41d p型ソース・ドレイン領域
42 ゲート絶縁膜
43 n型ポリシリコンゲート電極
44 シリサイド層
45 引張り応力膜
Claims (10)
- シリコン基板上に、素子領域を画成するように形成されたSTI構造の素子分離領域を有する半導体装置であって、前記素子分離領域は、
前記シリコン基板中に形成された素子分離溝と、
前記素子分離溝を充填する素子分離絶縁膜と
を含み、
前記素子分離絶縁膜の少なくとも表面部分は、HF耐性膜より構成されていることを特徴とする半導体装置。 - 前記前記素子分離絶縁膜は、前記HF耐性膜と、前記HF耐性膜の下のシリコン酸化膜とよりなることを特徴とする請求項1記載の半導体装置。
- 前記HF耐性膜はSiOCN膜よりなり、1.670以上の屈折率を有することを特徴とする請求項1または2記載の半導体装置。
- 前記HF耐性膜は、熱燐酸処理に対し、熱CVD法で形成されたSiN膜に等しい、あるいはより大きな耐性を示すことを特徴とする請求項1〜3のうち、いずれか一項記載の半導体装置。
- 前記素子領域には、pチャネルMOSトランジスタが形成され、前記pチャネルMOSトランジスタは、ソースおよびドレイン領域に、前記シリコン基板に対してエピタキシャルに形成されたp型SiGe領域を含むことを特徴とする請求項1〜4のうち、いずれか一項記載の半導体装置。
- シリコン基板上に、SiNパターンをマスクに素子分離溝を形成する工程と、
前記素子分離溝の少なくとも上部を充填するように、また前記SiNパターンを覆うように、HF耐性膜を堆積する工程と、
前記SiNパターン、および前記SiNパターン上のHF耐性膜を除去する工程と、を含む半導体装置の製造方法であって、
前記HF耐性膜は、ビスターシャリーブチルアミノシランを原料とする減圧CVD法により形成されることを特徴とする半導体装置の製造方法。 - 前記減圧CVD法は、前記ビスターシャリーブチルアミノシランを酸素またはN2Oと反応させてSiOCN膜を、前記HF耐性膜として形成することを特徴とする請求項6記載の半導体装置の製造方法。
- 前記減圧CVD法は、100Pa以下のプロセス圧の下で実行されることを特徴とする請求項7記載の半導体装置の製造方法。
- 前記減圧CVD法は、前記ビスターシャリーブチルアミノシランをアンモニアと反応させてSiCN膜を、前記HF耐性膜として形成することを特徴とする請求項6記載の半導体装置の製造方法。
- 前記素子分離溝を形成する工程の後、かつ前記HF耐性膜を堆積する工程の前に、前記素子分離溝の上部を残し底部をシリコン酸化膜により充填する工程と、をさらに含み、
前記HF耐性膜を堆積する工程は、前記HF耐性膜が、前記素子分離溝中において前記シリコン酸化膜を覆い、かつ前記素子分離溝上部を充填するように実行され、
前記SiNパターンおよびHF耐性膜を除去する工程は、前記HF耐性膜上に、前記素子分離溝に対応して形成されたシリコン酸化膜パターンをマスクに、ウェットエッチングにより実行されることを特徴とする請求項6〜9のうち、いずれか一項記載の半導体装置の製造方法。
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CNA2005101039565A CN1881586A (zh) | 2005-06-14 | 2005-09-16 | 半导体器件及其制造方法 |
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