JP2021184406A - 電力用半導体モジュール - Google Patents
電力用半導体モジュール Download PDFInfo
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- JP2021184406A JP2021184406A JP2020088572A JP2020088572A JP2021184406A JP 2021184406 A JP2021184406 A JP 2021184406A JP 2020088572 A JP2020088572 A JP 2020088572A JP 2020088572 A JP2020088572 A JP 2020088572A JP 2021184406 A JP2021184406 A JP 2021184406A
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Abstract
Description
図1は、実施の形態1による電力用半導体モジュール100の外観を示す図である。図2は、実施の形態1による電力用半導体モジュール100の樹脂モールド1を取り除いた内部構成を示す図である。実施の形態1による電力用半導体モジュール100は、樹脂モールド1、Pバスバー2、Nバスバー3、制御グランド端子4、制御ゲート端子5、放熱性金属基板6、半導体スイッチング素子7a、半導体スイッチング素子7b、および、ボンディングワイヤ8を備えている。半導体スイッチング素子7aは、表面にソース電極9aとゲートパッド10aとを備えており、図示されていないドレイン電極を裏面に備えている。半導体スイッチング素子7bは、表面にソース電極9bとゲートパッド10bとを備えており、図示されていないドレイン電極を裏面に備えている。放熱性金属基板6の上には半導体スイッチング素子7aおよび半導体スイッチング素子7bが隣接して配置されており、半導体スイッチング素子7aおよび半導体スイッチング素子7bのドレイン電極が放熱性金属基板6に接合されて電気的に接続されている。半導体スイッチング素子7aおよび半導体スイッチング素子7bの上にはNバスバー3が配置されており、半導体スイッチング素子7aのソース電極9aと半導体スイッチング素子7bのソース電極9bとがNバスバー3に接合されて電気的に接続されている。これにより、半導体スイッチング素子7aおよび半導体スイッチング素子7bは、ドレイン電極間およびソース電極間が電気的に並列接続され、一組のアームを構成している。Nバスバー3は、制御グランド端子4に接続されており、一方の端部は樹脂モールド1の外部に出力されている。半導体スイッチング素子7aのゲートパッド10aと半導体スイッチング素子7bのゲートパッド10bとにはボンディングワイヤ8が電気的に接続されており、ボンディングワイヤ8の端部は制御ゲート端子5に電気的に接続され、制御ゲート端子5は樹脂モールド1の外部に出力される。電力用半導体モジュール100は、樹脂モールド1によって封止される。
ΔVds=La(dIa/dt)−Lb(dIb/dt) (1)
図4は実施の形態2による電力用半導体モジュール200の外観を示す図であり、図5は実施の形態2による電力用半導体モジュール200の樹脂モールド1aを取り除いた内部構成を示す図である。実施の形態2による電力用半導体モジュール200は、実施の形態1による電力用半導体モジュール100を、基準線1000を対称軸として鏡面対称に配置した構成に基づいている。
図7は実施の形態3による電力用半導体モジュール300の外観を示す図であり、図8は実施の形態3による電力用半導体モジュール300の樹脂モールド1bを取り除いた内部構成を示す図である。実施の形態3による電力用半導体モジュール300を実施の形態2による電力用半導体モジュール200と比べると、半導体スイッチング素子7cのゲートパッド10cおよび半導体スイッチング素子7dのゲートパッド10dに接続されたボンディングワイヤ8cが制御ゲート端子5bに接続され、半導体スイッチング素子7eのゲートパッド10eおよび半導体スイッチング素子7fのゲートパッド10fに接続されたボンディングワイヤ8dが制御ゲート端子5cに接続されており、第1の制御ゲート端子である制御ゲート端子5bと第2の制御ゲート端子である制御ゲート端子5cとが基準線1000を対称軸として鏡面対称になっており、第1のボンディングワイヤであるボンディングワイヤ8cと第2のボンディングワイヤであるボンディングワイヤ8dとが基準線1000を対称軸として鏡面対称になっていることが異なっている。また、Nバスバー3b、制御グランド端子4bおよび放熱性金属基板6bの形状が実施の形態2による電力用半導体モジュール200によるものと異なっているが、Nバスバー3bおよび放熱性金属基板6bの形状が基準線1000を対称軸として鏡面対称になっていることは実施の形態2による電力用半導体モジュール200によるものと同じである。
図9は実施の形態4による電力用半導体モジュール400の外観を示す図であり、図10は実施の形態4による電力用半導体モジュール400の樹脂モールド1cを取り除いた内部構成を示す図である。図11は、実施の形態4による電力用半導体モジュール400の樹脂モールド1c、負アームNバスバー12および制御グランド端子4cを取り除いた内部構成を示す図である。図12は、実施の形態4による電力用半導体モジュール400の樹脂モールド1c、負アームNバスバー12、制御グランド端子4cおよび中間バスバー14を取り除いた内部構成を示す図である。
したがって、例示されていない無数の変形例が、本願に開示される技術の範囲内において想定される。例えば、少なくとも1つの構成要素を変形する場合、追加する場合または省略する場合、さらには、少なくとも1つの構成要素を抽出し、他の実施の形態の構成要素と組み合わせる場合が含まれるものとする。
Claims (13)
- 第一主電極およびゲートパッドを表面に有し第二主電極を裏面に有する複数の半導体スイッチング素子と、
前記半導体スイッチング素子のそれぞれの前記第一主電極が接合されたバスバーと、
前記半導体スイッチング素子のそれぞれの前記第二主電極が接合された放熱性金属基板と、
前記半導体スイッチング素子のそれぞれの前記ゲートパッドにボンディングワイヤによって接続された制御ゲート端子とを備え、
複数の前記半導体スイッチング素子のうちの少なくとも2つは、前記放熱性金属基板の上に隣接して配置され、電気的に並列接続された1つのアームを形成することを特徴とする電力用半導体モジュール。 - 隣接して配置された少なくとも2つの前記半導体スイッチング素子のそれぞれの最も近い点の間の距離が5mm以内であることを特徴とする請求項1に記載の電力用半導体モジュール。
- 前記バスバーと前記放熱性金属基板と前記ボンディングワイヤとの配置が、前記バスバーに流れる電流の方向と前記ボンディングワイヤに流れる電流の方向とが異なる方向となり、前記放熱性金属基板に流れる電流の方向と前記ボンディングワイヤに流れる電流の方向とが異なる方向となっていることを特徴とする請求項1または2に記載の電力用半導体モジュール。
- 隣接して配置された少なくとも2つの前記半導体スイッチング素子の前記ゲートパッドが複数の前記ボンディングワイヤのうちの1つの前記ボンディングワイヤに接続され、
全ての前記ボンディングワイヤが1つの前記制御ゲート端子に接続されたことを特徴とする請求項1から3のいずれか1項に記載の電力用半導体モジュール。 - 隣接して配置された少なくとも2つの前記半導体スイッチング素子の前記ゲートパッドが複数の前記ボンディングワイヤのうちの1つの前記ボンディングワイヤに接続され、
それぞれの前記ボンディングワイヤがそれぞれ異なる前記制御ゲート端子に接続されたことを特徴とする請求項1から3のいずれか1項に記載の電力用半導体モジュール。 - 隣接して配置された少なくとも2つの前記半導体スイッチング素子からなる第1の半導体スイッチング素子ユニットと、隣接して配置された少なくとも2つの前記半導体スイッチング素子からなる第2の半導体スイッチング素子ユニットとが、基準線を対称軸として鏡面対称に配置されていることを特徴とする請求項1から5のいずれか1項に記載の電力用半導体モジュール。
- 前記バスバーの構造が前記基準線を対称軸として鏡面対称であることを特徴とする請求項6に記載の電力用半導体モジュール。
- 前記ボンディングワイヤのうちの第1のボンディングワイヤと、前記ボンディングワイヤのうちの第2のボンディングワイヤとが、前記対称軸に対して鏡面対称に配置されていることを特徴とする請求項6または7に記載の電力用半導体モジュール。
- 前記半導体スイッチング素子に逆並列に接続された還流ダイオードを備えることを特徴とする請求項1から8のいずれか1項に記載の電力用半導体モジュール。
- 前記還流ダイオードはバンドギャップが珪素よりも広いワイドギャップ半導体によって形成されていることを特徴とする請求項9に記載の電力用半導体モジュール。
- 前記半導体スイッチング素子はバンドギャップが珪素よりも広いワイドギャップ半導体によって形成されていることを特徴とする請求項1から8のいずれか1項に記載の電力用半導体モジュール。
- 前記ワイドギャップ半導体は、炭化珪素、窒化ガリウムまたはダイヤモンドのいずれかであることを特徴とする請求項10または11に記載の電力用半導体モジュール。
- 2つの前記アームを備え、
一方の前記アームが正アームとして他方の前記アームが負アームとして互いに直列に接続され、
前記正アームと前記負アームとの接続点に接続された交流電極を備えていることを特徴とする請求項1から12のいずれか1項に記載の電力用半導体モジュール。
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