JP2009272423A - 半導体装置及びその製造方法 - Google Patents
半導体装置及びその製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 178
- 238000004519 manufacturing process Methods 0.000 title claims description 57
- 238000009792 diffusion process Methods 0.000 claims abstract description 167
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 75
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 66
- 229910052796 boron Inorganic materials 0.000 claims abstract description 50
- 239000012535 impurity Substances 0.000 claims description 129
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- 125000006850 spacer group Chemical group 0.000 claims description 34
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- 229910052732 germanium Inorganic materials 0.000 claims description 19
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- 239000010703 silicon Substances 0.000 claims description 19
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 18
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- 150000001793 charged compounds Chemical class 0.000 claims description 9
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- 229910052786 argon Inorganic materials 0.000 claims description 5
- 229910052743 krypton Inorganic materials 0.000 claims description 5
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 claims description 5
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- 229910052738 indium Inorganic materials 0.000 claims description 4
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 4
- 229910015900 BF3 Inorganic materials 0.000 claims description 2
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 claims description 2
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- -1 boron ions Chemical class 0.000 abstract description 45
- 238000002513 implantation Methods 0.000 description 131
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- 238000005468 ion implantation Methods 0.000 description 31
- 229910052785 arsenic Inorganic materials 0.000 description 28
- 229910052698 phosphorus Inorganic materials 0.000 description 19
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- 229910052814 silicon oxide Inorganic materials 0.000 description 17
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 16
- 230000007547 defect Effects 0.000 description 16
- 229910052581 Si3N4 Inorganic materials 0.000 description 15
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 15
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- HAYXDMNJJFVXCI-UHFFFAOYSA-N arsenic(5+) Chemical compound [As+5] HAYXDMNJJFVXCI-UHFFFAOYSA-N 0.000 description 4
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- 229910052751 metal Inorganic materials 0.000 description 4
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- 230000005465 channeling Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- OKZIUSOJQLYFSE-UHFFFAOYSA-N difluoroboron Chemical compound F[B]F OKZIUSOJQLYFSE-UHFFFAOYSA-N 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
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- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- CEPICIBPGDWCRU-UHFFFAOYSA-N [Si].[Hf] Chemical compound [Si].[Hf] CEPICIBPGDWCRU-UHFFFAOYSA-N 0.000 description 1
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- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 229910000449 hafnium oxide Inorganic materials 0.000 description 1
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
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Abstract
【解決手段】半導体装置は、半導体基板100の上に、ゲート絶縁膜101を介在させて形成されたゲート電極102と、半導体領域100におけるゲート電極102の両側方に形成され、ボロンイオンがそれぞれ拡散してなるP型エクステンション高濃度拡散層106と、半導体基板100における各P型エクステンション高濃度拡散層106の外側で且つ接合深さが各P型エクステンション高濃度拡散層よりも深いP型ソース・ドレイン拡散層113とを有している。P型エクステンション高濃度拡散層106は、ゲート電極102の両側方のうちの少なくとも一方に炭素を含む。
【選択図】図1
Description
本発明の第1の実施形態について図面を参照しながら説明する。
図2に本発明の第1の実施形態の一変形例に係る半導体装置の断面構成を示す。図2に示すように、本変形例に係る半導体装置は、第1のサイドウォール108A及び第2のサイドウォール108Bにフッ素を含む一方、P型ソース・ドレイン拡散層113には、フッ素(F)及び炭素(C)を含んでいる。
図7(a)〜図7(d)に第1の実施形態の半導体装置における製造方法の一変形例の要部の工程順の断面構成を示す。
以下、本発明の第2の実施形態について図面を参照しながら説明する。ここでは、第1の実施形態との相違点を製造方法により説明する。
以下、本発明の第3の実施形態について図面を参照しながら説明する。ここでは、第2の実施形態との相違点を製造方法により説明する。
101 ゲート絶縁膜
102 ゲート電極
103 N型チャネル拡散層
103A N型チャネル不純物注入層
104 N型ウェル
104A N型ウェル不純物注入層
106 P型エクステンション高濃度拡散層
106A 第1のP型不純物注入層
107 N型ポケット拡散層
107A N型ポケット不純物注入層
108A 第1のイドウォール
108B 第2のサイドウォール
109 オフセットスペーサ
110 アモルファス層
111A 炭素注入層
112 フッ素注入層
113 P型ソース・ドレイン拡散層
113A 第2のP型不純物注入層
Claims (20)
- 半導体領域の上に、ゲート絶縁膜を介在させて形成されたゲート電極と、
前記半導体領域における前記ゲート電極の両側方に形成され、第1導電型の第1の不純物がそれぞれ拡散してなるエクステンション拡散層と、
前記半導体領域における前記各エクステンション拡散層の外側で且つ接合深さが前記各エクステンション拡散層よりも深いソース・ドレイン拡散層とを備え、
前記エクステンション拡散層は、前記ゲート電極の両側方のうちの少なくとも一方に炭素を含むことを特徴とする半導体装置。 - 前記ソース・ドレイン拡散層は、フッ素を含むことを特徴とする請求項1に記載の半導体装置。
- 前記炭素は、前記エクステンション拡散層のうちのいずれか一方にのみ添加されていることを特徴とする請求項1又は2に記載の半導体装置。
- 前記炭素は、前記エクステンション拡散層の両方に添加されていることを特徴とする請求項1又は2に記載の半導体装置。
- 前記ゲート電極の側面上には、絶縁性を有するオフセットスペーサが形成され、該オフセットスペーサは、フッ素を含まないことを特徴とする請求項1〜4のいずれか1項に記載の半導体装置。
- 前記オフセットスペーサは、炭素を含むことを特徴とする請求項5に記載の半導体装置。
- 前記ゲート電極のゲート長方向の側面上には、前記オフセットスペーサを介在させた絶縁性を有するサイドウォールが形成され、該サイドウォールは、フッ素を含まないことを特徴とする請求項6に記載の半導体装置。
- 前記ソース・ドレイン拡散層には、ゲルマニウムが残存していることを特徴とする請求項1〜7のいずれか1項に記載の半導体装置。
- 半導体領域の上に、ゲート絶縁膜を介在させてゲート電極を形成する第1の工程と、
前記半導体領域に前記ゲート電極をマスクとして、第1の不純物イオンをイオン注入することにより、前記半導体領域をアモルファス化する第2の工程と、
アモルファス化した前記半導体領域に、炭素又は炭素を含む分子イオンを選択的にイオン注入する第3の工程と、
前記第3の工程よりも後に、前記半導体領域に前記ゲート電極をマスクとして、第1導電型の第2の不純物イオンをイオン注入する第4の工程と、
前記第4の工程よりも後に、前記半導体領域に第1の熱処理を加えることにより、前記半導体領域の上部における前記ゲート電極の側方の領域に、前記第2の不純物イオンが拡散してなる第1導電型のエクステンション拡散層を形成する第5の工程とを備えていることを特徴とする半導体装置の製造方法。 - 前記第2の工程及び第3の工程は、同時に行われることを特徴とする請求項9に記載の半導体装置の製造方法。
- 前記第2の工程は、前記半導体領域における前記ゲート電極の両側方のうち一方の側方領域をマスクして行うことを特徴とする請求項9又は10に記載の半導体装置の製造方法。
- 前記第2の工程は、前記半導体領域の上面における法線に対して斜めに注入することにより、前記半導体領域における前記ゲート電極の両側方のうちの一方の側方領域のみをアモルファス化することを特徴とする請求項9又は10に記載の半導体装置の製造方法。
- 前記第4の工程と前記第5の工程との間に、
前記ゲート電極の側面上に絶縁膜からなるサイドウォールを形成する第6の工程と、
前記ゲート電極及びサイドウォールをマスクとして、前記半導体領域に拡散防止用不純物イオンをイオン注入する第7の工程と、
前記7の工程よりも後に、前記ゲート電極及びサイドウォールをマスクとして、第1導電型の第3の不純物イオンをイオン注入する第8の工程とをさらに備え、
前記第5の工程において、前記第1の熱処理により、前記エクステンション拡散層の外側の領域に、前記第3の不純物イオンが拡散してなり且つ前記エクステンション拡散層よりも深い接合面を持つ第1導電型のソース・ドレイン拡散層を形成することを特徴とする請求項9〜12のいずれか1項に記載の半導体装置の製造方法。 - 前記第8の工程と前記第5の工程との間に、
前記サイドウォールを除去する第9の工程をさらに備えていることを特徴とする請求項13に記載の半導体装置の製造方法。 - 前記拡散防止用不純物イオンは、フッ素又はフッ素を含む分子イオンからなることを特徴とする請求項13又は14に記載の半導体装置の製造方法。
- 前記第1の工程と前記第2の工程との間に、
前記ゲート電極の側面上に絶縁膜性を有するオフセットスペーサを形成する第10の工程をさらに備えていることを特徴とする請求項9〜15のいずれか1項に記載の半導体装置の製造方法。 - 前記第4の工程と前記第5の工程との間に、
前記半導体領域に前記ゲート電極をマスクとして、第2導電型の第4の不純物を注入する第11の工程をさらに備え、
前記第5の工程において、前記第1の熱処理により、前記エクステンション拡散層の下側の領域に、前記第4の不純物が拡散してなる第2導電型のポケット拡散層を形成することを特徴とする請求項9〜16のいずれか1項に記載の半導体装置の製造方法。 - 前記第1の熱処理は、アニール時間が短時間で且つ高温にまで昇温可能なミリセカンドアニール、又は昇温レートが100℃/s以上且つ降温レートが80℃/s以上で、且つ、加熱温度を850℃以上1050℃以下とし、加熱時間を最大で10秒間保持するか若しくはピーク温度を保持しない急速熱処理であることを特徴とする請求項9〜17のいずれか1項に記載の半導体装置の製造方法。
- 前記第1の不純物イオンは、ゲルマニウム、シリコン、アルゴン、クリプトン、キセノン又は炭素からなることを特徴とする請求項9〜18のいずれか1項に記載の半導体装置の製造方法。
- 前記第2の不純物イオンは、ボロン、フッ化ボロン若しくはクラスタボロン、又はインジウムからなることを特徴とする請求項9〜18のいずれか1項に記載の半導体装置の製造方法。
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