JP7491707B2 - 電気回路体、電力変換装置、および電気回路体の製造方法 - Google Patents
電気回路体、電力変換装置、および電気回路体の製造方法 Download PDFInfo
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- JP7491707B2 JP7491707B2 JP2020039863A JP2020039863A JP7491707B2 JP 7491707 B2 JP7491707 B2 JP 7491707B2 JP 2020039863 A JP2020039863 A JP 2020039863A JP 2020039863 A JP2020039863 A JP 2020039863A JP 7491707 B2 JP7491707 B2 JP 7491707B2
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Description
本発明による電気回路体の製造方法は、パワー半導体素子と、前記パワー半導体素子の一方の面に接続される第1導体板と、第1樹脂絶縁層を有し、前記第1導体板の表面を少なくとも覆う第1シート状部材とを封止材で封止してなる電気回路体の製造方法であって、前記第1シート状部材は、前記第1シート状部材の端部を含み前記封止材によって覆われる埋没部と、前記第1導体板と重なる領域であってその表面が前記封止材から露出する放熱面部と、前記埋没部と前記放熱面部との間の領域であってその表面が前記封止材から露出する余白部と、を有し、前記埋没部が前記封止材によって覆われ、前記放熱面部および前記余白部が前記埋没部を覆う前記封止材の表面よりそれぞれ突出するように、前記パワー半導体素子、前記第1導体板および前記第1シート状部材を前記封止材で封止する第1工程と、前記封止材を硬化収縮させ、前記余白部の前記埋没部を覆う前記封止材の表面からの突出高さが前記放熱面部よりも低くなるようにする第2工程と、冷却部材を前記第1シート状部材に密着する第3工程と、を含む。
図6(f)は、以上の工程により製造された電気回路体400を示す図である。このようにして、パワーモジュール300の両面に冷却部材340が設置されて電気回路体400が製造される。
また、封止材360とCuの収縮量の差は、X-Y方向では反りとなる。一般に、電気回路体400は、通常コレクタ側の第2導体板431および第4導体板433の方が、エミッタ側の第1導体板430および第3導体板432よりも体積が大きくなる。封止材360の収縮量がCuより大きい場合、Cuより封止材360の方がより収縮する。コレクタ側とエミッタ側で比較すると、封止材360の占める割合が大きいエミッタ側がコレクタ側より収縮するため、エミッタ側が凹となる反りが発生する。
図12、図13に示すように、正極側端子315Bは、上アーム回路のコレクタ側から出力しており、バッテリ又はコンデンサの正極側に接続される。上アームゲート信号端子325Uは、上アーム回路の能動素子155のゲート及びエミッタセンスから出力している。負極側端子319Bは、下アーム回路のエミッタ側から出力しており、バッテリ若しくはコンデンサの負極側、又はGNDに接続される。下アームゲート信号端子325Lは、下アーム回路の能動素子157のゲート及びエミッタセンスから出力している。交流側端子320Bは、下アーム回路のコレクタ側から出力しており、モータに接続される。中性点接地をする場合は、下アーム回路は、GNDでなくコンデンサの負極側に接続する。
電力変換装置200は、インバータ回路140、142と、補機用のインバータ回路43と、コンデンサモジュール500とを備えている。インバータ回路140及び142は、パワーモジュール300を複数個備えた電気回路体400(図示省略)により構成されており、それらを接続することにより三相ブリッジ回路を構成している。電流容量が大きい場合には、更にパワーモジュール300を並列接続し、これら並列接続を三相インバータ回路の各相に対応して行うことにより、電流容量の増大に対応できる。また、パワーモジュール300に内蔵しているパワー半導体素子である能動素子155、157やダイオード156、158を並列接続することでも電流容量の増大に対応できる。
図15に示すように、電力変換装置200は、下部ケース11および上部ケース10により構成され、ほぼ直方体形状に形成された筐体12を備えている。筐体12の内部には、電気回路体400、コンデンサモジュール500等が収容されている。電気回路体400は冷却流路を有しており、筐体12の一側面からは、冷却流路に連通する冷却水流入管13および冷却水流出管14が突出している。下部ケース11は、上部側(Z方向)が開口され、上部ケース10は、下部ケース11の開口を塞いで下部ケース11に取り付けられている。上部ケース10と下部ケース11とは、アルミニウム合金等により形成され、外部に対して密封して固定される。上部ケース10と下部ケース11とを一体化して構成してもよい。筐体12を、単純な直方体形状としたことで、車両等への取り付けが容易となり、また、生産性も向上する。
(1)電気回路体400は、パワー半導体素子155と、パワー半導体素子155の一方の面に接続される第1導体板430と、第1樹脂絶縁層442を有し、第1導体板430の表面を少なくとも覆う第1シート状部材440と、パワー半導体素子155、第1導体板430、および第1シート状部材440の端部を封止する封止材360と、第1シート状部材440に密着する第1冷却部材340とを備え、第1シート状部材440は、第1シート状部材440の端部が封止材360によって覆われた埋没部Cと、第1導体板430の表面と重なる領域である放熱面部Aと、埋没部Cと放熱面部Aとの間の領域である余白部Bと、を有し、余白部Bは放熱面部Aよりも内部に後退し、埋没部Cは余白部Bよりも内部に後退している。これにより、電気回路体に反りが生じても、冷却部材との間の密着性を確保し、放熱性が損なわれない。
Claims (12)
- パワー半導体素子と、前記パワー半導体素子の一方の面に接続される第1導体板と、第1樹脂絶縁層を有し、前記第1導体板の表面を少なくとも覆う第1シート状部材と、前記パワー半導体素子、前記第1導体板、および前記第1シート状部材の端部を封止する封止材と、前記第1シート状部材に密着する第1冷却部材とを備え、
前記第1シート状部材は、前記第1シート状部材の前記端部を含み前記封止材によって覆われた埋没部と、前記第1導体板と重なる領域であってその表面が前記封止材から露出した放熱面部と、前記埋没部と前記放熱面部との間の領域であってその表面が前記封止材から露出した余白部と、を有し、
前記第1シート状部材の前記放熱面部および前記余白部は、前記埋没部を覆う前記封止材の表面よりそれぞれ突出しており、
前記第1シート状部材の前記余白部は、前記埋没部を覆う前記封止材の表面からの突出高さが前記放熱面部よりも低い電気回路体。 - 請求項1に記載の電気回路体において、
前記パワー半導体素子の他方の面に接続される第2導体板と、第2樹脂絶縁層を有し、
前記第2導体板の表面を少なくとも覆う第2シート状部材と、前記第2シート状部材に密着する第2冷却部材とを備え、
前記封止材は、前記第2導体板、および前記第2シート状部材の端部を封止し、
前記第2シート状部材は、前記第2シート状部材の前記端部を含み前記封止材によって覆われた埋没部と、前記第2導体板と重なる領域であってその表面が前記封止材から露出した放熱面部と、前記埋没部と前記放熱面部との間の領域であってその表面が前記封止材から露出した余白部と、を有し、
前記第2シート状部材の前記放熱面部および前記余白部は、前記埋没部を覆う前記封止材の表面よりそれぞれ突出しており、
前記第2シート状部材の前記余白部は、前記埋没部を覆う前記封止材の表面からの突出高さが前記放熱面部よりも低い電気回路体。 - 請求項1に記載の電気回路体において、
前記第1シート状部材は、前記第1樹脂絶縁層と、第1金属箔とを積層してなり、
前記第1冷却部材は、前記第1金属箔を介して前記第1シート状部材の前記放熱面部と密着する電気回路体。 - 請求項2に記載の電気回路体において、
前記第2シート状部材は、前記第2樹脂絶縁層と、第2金属箔とを積層してなり、
前記第2冷却部材は、前記第2金属箔を介して前記第2シート状部材の前記放熱面部と密着する電気回路体。 - 請求項1に記載の電気回路体において、
前記第1冷却部材は、熱伝導部材を介して前記第1シート状部材と密着する電気回路体。 - 請求項2に記載の電気回路体において、
前記第2冷却部材は、熱伝導部材を介して前記第2シート状部材と密着する電気回路体。 - 請求項1または請求項3に記載の電気回路体において、
前記封止材は、前記第1導体板より温度に対する収縮量が大きい電気回路体。 - 請求項2または請求項4に記載の電気回路体において、
前記封止材は、前記第2導体板より温度に対する収縮量が大きい電気回路体。 - 請求項1または請求項2に記載の電気回路体において、
前記パワー半導体素子より導出され、コンデンサに接続される第1端子と、
前記第1端子とは反対側に前記パワー半導体素子より導出され、モータに接続される第2端子とを備えた電気回路体。 - 請求項1から請求項9までのいずれか一項に記載の電気回路体により構成され、直流電力を交流電力に変換する電力変換装置。
- パワー半導体素子と、前記パワー半導体素子の一方の面に接続される第1導体板と、第1樹脂絶縁層を有し、前記第1導体板の表面を少なくとも覆う第1シート状部材とを封止材で封止してなる電気回路体の製造方法であって、
前記第1シート状部材は、前記第1シート状部材の端部を含み前記封止材によって覆われる埋没部と、前記第1導体板と重なる領域であってその表面が前記封止材から露出する放熱面部と、前記埋没部と前記放熱面部との間の領域であってその表面が前記封止材から露出する余白部と、を有し、
前記埋没部が前記封止材によって覆われ、前記放熱面部および前記余白部が前記埋没部を覆う前記封止材の表面よりそれぞれ突出するように、前記パワー半導体素子、前記第1導体板および前記第1シート状部材を前記封止材で封止する第1工程と、
前記封止材を硬化収縮させ、前記余白部の前記埋没部を覆う前記封止材の表面からの突出高さが前記放熱面部よりも低くなるようにする第2工程と、
冷却部材を前記第1シート状部材に密着する第3工程と、
を含む電気回路体の製造方法。 - 請求項11に記載の電気回路体の製造方法において、
前記第3工程は、熱伝導部材を介して前記冷却部材を前記第1シート状部材へ密着する工程を含む電気回路体の製造方法。
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JP2005012163A (ja) | 2003-05-26 | 2005-01-13 | Denso Corp | 半導体装置 |
JP2009212302A (ja) | 2008-03-04 | 2009-09-17 | Denso Corp | 半導体モジュール及びその製造方法 |
JP2011009410A (ja) | 2009-06-25 | 2011-01-13 | Mitsubishi Electric Corp | 半導体モジュール |
WO2013124988A1 (ja) | 2012-02-22 | 2013-08-29 | 三菱電機株式会社 | 半導体装置および半導体装置の製造方法 |
JP2013258334A (ja) | 2012-06-13 | 2013-12-26 | Denso Corp | 半導体装置及びその製造方法 |
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JP2005012163A (ja) | 2003-05-26 | 2005-01-13 | Denso Corp | 半導体装置 |
JP2009212302A (ja) | 2008-03-04 | 2009-09-17 | Denso Corp | 半導体モジュール及びその製造方法 |
JP2011009410A (ja) | 2009-06-25 | 2011-01-13 | Mitsubishi Electric Corp | 半導体モジュール |
WO2013124988A1 (ja) | 2012-02-22 | 2013-08-29 | 三菱電機株式会社 | 半導体装置および半導体装置の製造方法 |
JP2013258334A (ja) | 2012-06-13 | 2013-12-26 | Denso Corp | 半導体装置及びその製造方法 |
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