JP5534034B2 - 半導体装置および半導体装置の製造方法 - Google Patents
半導体装置および半導体装置の製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims description 105
- 238000004519 manufacturing process Methods 0.000 title claims description 26
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 174
- 229920005591 polysilicon Polymers 0.000 claims description 174
- 229910052751 metal Inorganic materials 0.000 claims description 82
- 239000002184 metal Substances 0.000 claims description 82
- 230000015556 catabolic process Effects 0.000 claims description 78
- 239000000758 substrate Substances 0.000 claims description 32
- 230000002093 peripheral effect Effects 0.000 claims description 24
- 238000009792 diffusion process Methods 0.000 claims description 18
- 239000011229 interlayer Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- 239000012535 impurity Substances 0.000 claims description 6
- 239000002344 surface layer Substances 0.000 claims description 5
- 239000010408 film Substances 0.000 description 137
- 230000005684 electric field Effects 0.000 description 18
- 238000005530 etching Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 10
- 239000010410 layer Substances 0.000 description 9
- 238000005468 ion implantation Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 230000007774 longterm Effects 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 4
- 238000000206 photolithography Methods 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000001312 dry etching Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000059 patterning Methods 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000007261 regionalization Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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Description
本発明の実施の形態にかかる半導体装置について、図1〜4を参照して説明する。図1は、本発明の実施の形態にかかる半導体装置の構成を示す平面図である。図2は、図1の半導体装置の要部を詳細に示す説明図である。図3,4は、図1の半導体装置の要部を詳細に示す断面図である。図1(b)の平面図に示すように、本発明の実施の形態1にかかる半導体装置は、矩形状の平面形状を有する半導体基板1の中央部に設けられた主電流が流れる素子活性部2と、この素子活性部2の外周を取り巻く耐圧構造部3と、を備える。図1(b)においては、素子活性部2と耐圧構造部3との相互の配置を明確に示すために、それぞれの内部の詳細な構造および平面パターンを図示省略する。
2 素子活性部
3 耐圧構造部
3−1 耐圧構造部の直線部
3−2 耐圧構造部のコーナー部
4b ガードリング
5 絶縁膜
6 層間絶縁膜
7 ポリシリコンフィールドプレート
8 ポリシリコンブリッジ
9a 金属電極
9b 金属膜フィールドプレート
10 コンタクト部
11 酸化膜
12、13 一点鎖線
Claims (6)
- 矩形状の第1導電型半導体基板に設けられた、主電流の流れる素子活性部と、
直線部と当該直線部を曲線状に連結するコーナー部とを有し、前記素子活性部を囲む耐圧構造部と、
前記第1導電型半導体基板の表面層に、前記耐圧構造部の前記直線部から前記コーナー部に亘って設けられた第2導電型のガードリングと、
前記ガードリングの表面に絶縁膜を介して設けられ、当該ガードリングの内周側と外周側とに分離して配置される環状のポリシリコンフィールドプレートと、
内周側の前記ポリシリコンフィールドプレートと外周側の前記ポリシリコンフィールドプレートとの間の前記絶縁膜上に設けられ、前記ポリシリコンフィールドプレートどうしを相互に所定の間隔で連結する複数のポリシリコンブリッジと、
前記絶縁膜、前記ポリシリコンフィールドプレート、前記ポリシリコンブリッジおよび前記ガードリングの表面に設けられた層間絶縁膜と、
前記層間絶縁膜に設けられ、前記ポリシリコンブリッジおよび前記ガードリングを選択的に露出するコンタクトホールと、
前記コンタクトホールを介して前記ポリシリコンブリッジおよび前記ガードリングに接し、前記ポリシリコンブリッジと前記ガードリング表面とを相互に導電接続する金属膜フィールドプレートと、
を備え、
前記金属膜フィールドプレートは、前記耐圧構造部の前記コーナー部の前記ガードリング上と、前記耐圧構造部の前記直線部の少なくとも一つの前記ガードリング上とに設けられていることを特徴とする半導体装置。 - 前記ガードリングは環状に配置され、
前記金属膜フィールドプレートが、少なくとも一つの前記ガードリングの全周に亘って設け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。 - 前記ポリシリコンブリッジの幅が前記ガードリングの拡散深さの2倍よりも狭いことを特徴とする請求項1に記載の半導体装置。
- 前記ポリシリコンブリッジの幅が前記ガードリングの拡散深さの0.8倍よりも狭いことを特徴とする請求項3に記載の半導体装置。
- 前記耐圧構造部の前記コーナー部および前記直線部に配置された部分上に前記金属膜フィールドプレートを有する前記ガードリングと、前記コーナー部に配置された部分上のみに前記金属膜フィールドプレートを有する前記ガードリングとが、前記素子活性部側から前記第1導電型半導体基板の外周部側へ向かう方向に交互に配置されていることを特徴とする請求項1〜4のいずれか一つに記載の半導体装置。
- 矩形状の第1導電型半導体基板に設けられた、主電流の流れる素子活性部と、直線部と当該直線部を曲線状に連結するコーナー部とを有し、前記素子活性部を囲む耐圧構造部と、前記第1導電型半導体基板の表面層に、前記耐圧構造部の前記直線部から前記コーナー部に亘って設けられた第2導電型のガードリングと、前記ガードリングの表面に絶縁膜を介して設けられ、当該ガードリングの内周側と外周側とに分離して配置される環状のポリシリコンフィールドプレートと、内周側の前記ポリシリコンフィールドプレートと外周側の前記ポリシリコンフィールドプレートとの間の前記絶縁膜上に設けられ、前記ポリシリコンフィールドプレートどうしを相互に所定の間隔で連結する複数のポリシリコンブリッジと、前記絶縁膜、前記ポリシリコンフィールドプレート、前記ポリシリコンブリッジおよび前記ガードリングの表面に設けられた層間絶縁膜と、前記層間絶縁膜に設けられ、前記ポリシリコンブリッジおよび前記ガードリングを選択的に露出するコンタクトホールと、前記コンタクトホールを介して前記ポリシリコンブリッジおよび前記ガードリングに接し、前記ポリシリコンブリッジと前記ガードリング表面とを相互に導電接続する金属膜フィールドプレートと、を備え、前記金属膜フィールドプレートは、前記耐圧構造部の前記コーナー部の前記ガードリング上と、前記耐圧構造部の前記直線部の少なくとも一つの前記ガードリング上とに設けられている半導体装置の製造方法であって、
前記第1導電型半導体基板の表面に、前記素子活性部を囲む環状の複数の前記ポリシリコンフィールドプレートを形成する工程と、
前記ポリシリコンフィールドプレートをマスクとして、前記ポリシリコンフィールドプレートに挟まれた部分に露出する前記第1導電型半導体基板に第2導電型不純物をイオン注入することで前記ガードリングを形成する工程と、
を含むことを特徴とする半導体装置の製造方法。
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JP5949941B2 (ja) * | 2012-11-29 | 2016-07-13 | 富士電機株式会社 | 半導体装置 |
DE112014002993T5 (de) * | 2013-06-27 | 2016-03-03 | Mitsubishi Electric Corp. | Halbleitervorrichtung und Verfahren zum Herstellen derselben |
CN104944354B (zh) * | 2014-03-31 | 2017-11-14 | 中芯国际集成电路制造(上海)有限公司 | 芯片结构、其制作方法及包括其的mems器件 |
CN104319287A (zh) * | 2014-10-31 | 2015-01-28 | 无锡同方微电子有限公司 | 一种沟槽栅型半导体器件结构及其制作方法 |
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