JP2012178484A - パワー半導体モジュール,パワー半導体モジュールの製造方法及び電力変換装置 - Google Patents
パワー半導体モジュール,パワー半導体モジュールの製造方法及び電力変換装置 Download PDFInfo
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Abstract
【解決手段】パワー半導体素子と、パワー半導体素子と接続される導体部材とを有する回路体と、回路体を収納する袋状の収納部材と、回路体と収納部材とを接続する接続部材と、を備えるパワー半導体モジュールにおいて、収納部材は、回路体を挟みかつ保持するように対向して配置された第1放熱部材及び第2放熱部材と、第1放熱部材と第2放熱部材と繋ぐ側壁と、第1放熱部材の周囲に形成されかつ側壁に接続される中間部材と、を備え、かつ、中間部材を、収納部材の収納空間に向かって凸となるように湾曲させた構造とすることで、接続部材への残留応力を低減する。
【選択図】 図3
Description
2A,2B,6 接合部材
3A,3B 導体板
4 封止材
5 ケース
5A 第1放熱部材
5B 第2放熱部材
5C 側壁
5D,5E 中間部材
5F 凸変形領域
5G 開口
5H 第1接続部
5I 第2接続部
5J,5K 距離
6A,9A,9B 角部
7 凸頂点部
100 回路体
300 パワー半導体モジュール
Claims (12)
- パワー半導体素子と、当該パワー半導体素子と接続される導体部材とを有する回路体と、
前記回路体を収納するケースと、
前記回路体と前記ケースとを接続する接続部材と、を備えるパワー半導体モジュールであって、
前記ケースは、前記回路体を挟むように対向して配置された第1放熱部材及び第2放熱部材と、当該第1放熱部材と当該第2放熱部材と繋ぐ側壁と、当該第1放熱部材の周囲に形成されかつ当該側壁に接続される中間部材と、を備え、
前記中間部材は、前記収納部材の収納空間に向かって凸となるように湾曲した部分が形成されるパワー半導体モジュール。 - 請求項1に記載されたパワー半導体モジュールであって、
前記第1放熱部材と前記中間部材との接続部を第1接続部と定義するとともに前記側壁と前記中間部材との接続部を第2接続部と定義した場合、前記中間部材に形成される凸部は、前記第1接続部と前記第2接続部を結ぶ線分の位置よりも前記回路体が配置された側に凸形状を為すパワー半導体モジュール。 - 請求項2に記載のパワー半導体モジュールであって、
前記凸部の頂点が、前記第1接続部と前記第2接続部を結ぶ線分の中間部に形成されるパワー半導体モジュール。 - 請求項2に記載のパワー半導体モジュールであって、
前記凸部の頂点が、前記第1接続部と前記第2接続部を結ぶ線分の中間部よりも前記第1接続部に近い側に形成されるパワー半導体モジュール。 - 請求項2に記載のパワー半導体モジュールであって、
前記凸部の頂点が、前記第1接続部と前記第2接続部を結ぶ線分の中間部よりも前記第2接続部に近い側に形成されるパワー半導体モジュール。 - 請求項2に記載のパワー半導体モジュールであって、
前記第1接続部は、前記第1放熱部材の角部であり、
前記第2接続部は、前記中間部材の角部であるパワー半導体モジュール。 - 請求項6に記載のパワー半導体モジュールであって、
前記第1放熱部材の放熱面から投影した場合において、前記中間部材に形成された凸部の投影部は、前記第1接続部の角部を形成するための前記第1放熱部材の隣り合う2つの辺に沿って屈曲する形状を為すパワー半導体モジュール。 - 請求項1に記載されたパワー半導体モジュールであって、
前記中間部材の湾曲した部分は、塑性変形されているパワー半導体モジュール。 - 半導体素子と、前記半導体素子の電極面とはんだを介して接続される導体板とを有する回路体と、
前記回路体の一方の面と対向する第1放熱板と、前記回路体の一方の面とは反対側の他方の面と対向する第2放熱板と、前記第1放熱板と前記第2放熱板を接続しかつ前記回路体を挿入するための開口を形成する中間部材とを有する金属製のケースと、を備えるパワー半導体モジュールの製造方法であって、
前記ケースの開口から前記回路体を挿入する第1工程と、
前記第1放熱板と前記第2放熱板によって前記回路体を挟むように、前記ケースの前記中間部材の一部を変形させる第2工程と、
前記ケースの前記中間部材の一部を更に変形する第3工程と、
前記ケース及び前記回路体に高温処理を施す第4工程と、を有するパワー半導体モジュールの製造方法。 - 請求項9に記載されたパワー半導体モジュールの製造方法であって、
前記第4工程の前記高温処理は、120℃〜180℃であるパワー半導体モジュールの製造方法。 - 請求項9又は10に記載されたいずれかのパワー半導体モジュールの製造方法であって、
前記パワー半導体モジュールは、前記第1放熱板と前記第2放熱板の少なくとも一方と前記回路体とを接合する絶縁性のシートを有し、
前記シートは、前記第3工程の前記高温処理によって接着力が増加するパワー半導体モジュールの製造方法。 - 直流電流を交流電流に変換するパワー半導体素子を備えるパワー半導体モジュールと、前記パワー半導体素子を冷却するための冷媒を流す流路を形成する流路形成体と、を備えた電力変換装置であって、
前記パワー半導体モジュールは、前記パワー半導体素子と接続される導体部材を有する回路体と、前記回路体を収納するケースと、前記回路体と前記ケースとを接続する接続部材と、を有し、
前記ケースは、前記回路体を挟むように対向して配置された第1放熱部材及び第2放熱部材と、当該第1放熱部材と当該第2放熱部材と繋ぐ側壁と、当該第1放熱部材の周囲に形成されかつ当該側壁に接続される中間部材と、を備え、
前記中間部材は、前記収納部材の収納空間に向かって凸となるように湾曲した部分が形成され、
さらに前記ケースは、前記第1放熱部材及び第2放熱部材が前記冷媒と直接接触するように前記流路形成体に固定される電力変換装置。
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