JP6447139B2 - 高耐圧集積回路装置 - Google Patents
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Description
Diode)116、117である。この間、駆動素子であるHVIC111では、下アームのIGBT114へのゲート信号はGND基準にて信号を出力し、上アームのIGBT115へのゲート信号はVs端子基準にて信号を出力することになる。このため、HVIC111はレベルシフト機能を備える必要がある。
[作用]
本発明において、ハイサイド駆動回路内のVs電位を取り囲んでいるp-開口部と、p-開口部の配置されていない箇所にH−VDD端子のピックアップ電極を設ける。これにより、Vs端子の電位がマイナス方向に低下し、H−VDD端子の電位と接続されたハイサイド駆動回路および高耐圧接合終端領域のnウェル領域が過渡的にGND電位より低くなった場合に、高耐圧接合終端領域の共通電位領域であるp領域をアノード層とし、高耐圧接合終端領域の耐圧領域であるn-ウェル領域をカソード層として構成される寄生ダイオ
ードの電流注入(正孔キャリア注入)を上記ピックアップ電極部に流すことができる。
2,3 nウェル領域
4 n-ウェル領域,耐圧領域
21,31 pオフセット領域
51 pウェル領域
22、32 nコンタクト領域
23 pソース領域
24 pドレイン領域
25、29、35、55 ゲート電極
26、52 nドレイン領域
27、53 nソース領域
28 pコンタクト領域
33 pソース領域
34 pドレイン領域
41 nチャネルMOSFET(レベルシフト)
42、44 ボディーダイオード
43 pチャネルMOSFET
45、46 ダイオード
56 第1高濃度領域
61 p共通電位領域
62、62a、62b、62c 第2高濃度領域
63 p-開口部
63a 欠落部
71、72 レベルシフト抵抗
75、76 ダイオード
80 nオフセット領域
81 Vs電位領域
82 H−VDD電位領域
101、102 出力部
120 高電圧電源端子
193 高耐圧接合終端領域(HVJT)
202 第1ピックアップ電極
202a、303d 金属膜
202b、303e 金属
203、203a、203b、203c 第2ピックアップ電極
100、200、200a、300、400、500 高耐圧集積回路装置
H−VDD 高電圧電源
L−VDD 低電圧電源
GND グランド(接地)
Vs 中間電位
Claims (14)
- 直列に接続された2つのパワートランジスタの高電位側パワートランジスタを駆動する高耐圧半導体集積回路装置であって、第1導電型の半導体層の表面層または表面上に形成された第2導電型の高電位領域と、前記半導体層の表面層または表面上に形成され、前記高電位領域に接して取り囲み、前記高電位領域よりも不純物濃度の低い第2導電型の耐圧領域と、前記半導体層の表面層または表面上に、前記耐圧領域と接して取り囲む第1導電型の共通電位領域と、前記高電位領域内に形成された第1導電型の中間電位領域と、前記高電位領域の表面層に形成された第2導電型の第1高濃度領域と、前記共通電位領域の表面層に形成された第1導電型の第2高濃度領域と、
前記第1高濃度領域に接する第1ピックアップ電極と、前記第2高濃度領域に接する第2ピックアップ電極と、を備え、
前記中間電位領域は、前記高電位領域内に形成された回路領域を構成し、直列に接続された2つの前記パワートランジスタの主回路電源である高電圧電源の高電位側電位から該高電圧電源の低電位側電位である共通電位までの間の中間電位が印加される領域であり、前記高電位領域は、前記中間電位を基準として低電圧電源の高電位側の電位が印加される領域であり、高耐圧接合終端領域は、前記耐圧領域、前記共通電位領域、前記第1高濃度領域および前記第2高濃度領域からなる領域である高耐圧集積回路装置であって、
前記高電位領域の表面から前記第1導電型の半導体層に達し前記回路領域を取り囲み欠落部を有する第1導電型の開口部を備え、前記欠落部が位置する箇所の前記共通電位領域と前記回路領域の間の前記耐圧領域および前記高電位領域に前記欠落部を挟んで対向するように第1の前記第1高濃度領域と第2の前記第1高濃度領域とを配置することを特徴とする高耐圧集積回路装置。 - 前記開口部は、前記高電位領域表面から該高電位領域を貫通して前記第1導電型の半導体層に達する第1導電型領域であることを特徴とする請求項1に記載の高耐圧集積回路装置。
- 前記開口部は、前記高電位領域内に所定の間隔をあけて前記第1導電型の半導体層が表面に露出した領域であることを特徴とする請求項1に記載の高耐圧集積回路装置。
- 前記第1導電型の半導体層が表面に露出した領域に第1導電型の追加拡散層を備えることを特徴とする請求項3に記載の高耐圧集積回路装置。
- 前記欠落部から前記中間電位領域までの距離が100μm以上であることを特徴とする請求項1〜4のいずれか一項に記載の高耐圧集積回路装置。
- 前記回路領域のうち低電圧電源の高電位側の電位が印加される高電位回路領域を備え、前記欠落部から前記中間電位領域および前記高電位回路領域までの距離が100μm以上であることを特徴とする請求項1〜4のいずれか一項に記載の高耐圧集積回路装置。
- 前記中間電位領域が、前記欠落部に対向し、かつ前記開口部に近接して配置されることを特徴とする請求項1〜4のいずれか一項に記載の高耐圧集積回路装置。
- 前記回路領域に接続するパッドが、前記中間電位領域と前記欠落部に挟まれた前記高電位領域上に絶縁膜を介して配置されることを特徴とする請求項1〜4のいずれか一項に記載の高耐圧集積回路装置。
- 前記高電位領域に配置されている容量素子および抵抗素子の少なくとも一つが、前記中間電位領域と前記欠落部に挟まれた前記高電位領域に配置されることを特徴とする請求項1〜4のいずれか一項に記載の高耐圧集積回路装置。
- 前記高電位領域の端部の平面形状が四つ以上の辺とそれらを接続する円弧部を有するコーナーであるとき、前記開口部が前記高電位領域の端部の一辺とそれに隣接する二辺からなる三辺以上に沿って配置されることを特徴とする請求項1〜4のいずれか一項に記載の高耐圧集積回路装置。
- 前記高電位領域の端部の平面形状が四つ以上の辺とそれらを接続する円弧部を有するコーナーであるとき、前記開口部が前記高電位領域の端部の一辺とそれに隣接する二辺からなる三辺以上に連続して前記共通電位領域と前記中間電位領域との間に配置されることを特徴とする請求項1〜4のいずれか一項に記載の高耐圧集積回路装置。
- 直列に接続された2つのパワートランジスタの高電位側パワートランジスタを駆動する高耐圧半導体集積回路装置であって、第1導電型の半導体層の表面層または表面上に形成された第2導電型の高電位領域と、前記半導体層の表面層または表面上に形成され、前記高電位領域に接して取り囲み、前記高電位領域よりも不純物濃度の低い第2導電型の耐圧領域と、前記半導体層の表面層または表面上に、前記耐圧領域と接して取り囲む第1導電型の共通電位領域と、前記高電位領域内に形成された第1導電型の中間電位領域と、前記高電位領域の表面層に形成された第2導電型の第1高濃度領域と、前記共通電位領域の表面層に形成された第1導電型の第2高濃度領域と、
前記第1高濃度領域に接する第1ピックアップ電極と、前記第2高濃度領域に接する第2ピックアップ電極と、を備え、
前記中間電位領域は、前記高電位領域内に形成された回路領域を構成し、直列に接続された2つの前記パワートランジスタの主回路電源である高電圧電源の高電位側電位から該高電圧電源の低電位側電位である共通電位までの間の中間電位が印加される領域であり、前記高電位領域は、前記中間電位を基準として低電圧電源の高電位側の電位が印加される領域であり、高耐圧接合終端領域は、前記耐圧領域、前記共通電位領域、前記第1高濃度領域および前記第2高濃度領域からなる領域である高耐圧集積回路装置であって、
前記高電位領域の表面から前記第1導電型の半導体層に達し前記回路領域を取り囲み欠落部を有する第1導電型の開口部を備え、前記欠落部が位置する箇所の前記共通電位領域と前記回路領域の間の前記耐圧領域もしくは前記高電位領域に前記第1高濃度領域を配置し、
前記高電位領域の端部の平面形状が四つ以上の辺とそれらを接続する円弧部を有するコーナーであるとき、前記開口部が前記高電位領域の端部の一辺とそれに隣接する二辺からなる三辺以上に沿って配置され、平面形状において、前記隣接する二辺に挟まれた位置にのみ前記回路領域を配置することを特徴とする高耐圧集積回路装置。 - 前記欠落部から前記中間電位領域までの距離が100μm以上であることを特徴とする請求項12に記載の高耐圧集積回路装置。
- 前記回路領域のうち低電圧電源の高電位側の電位が印加される高電位回路領域を備え、前記欠落部から前記中間電位領域および前記高電位回路領域までの距離が100μm以上であることを特徴とする請求項12に記載の高耐圧集積回路装置。
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