JP5821949B2 - 半導体装置及びこれを備えたインバータ装置、並びにこれらを備えた車両用回転電機 - Google Patents
半導体装置及びこれを備えたインバータ装置、並びにこれらを備えた車両用回転電機 Download PDFInfo
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- JP5821949B2 JP5821949B2 JP2013510731A JP2013510731A JP5821949B2 JP 5821949 B2 JP5821949 B2 JP 5821949B2 JP 2013510731 A JP2013510731 A JP 2013510731A JP 2013510731 A JP2013510731 A JP 2013510731A JP 5821949 B2 JP5821949 B2 JP 5821949B2
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- H—ELECTRICITY
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Description
また、間隙部を中心として、第1および第2の半導体素子が点対称に配置され、第1のリードが第1の半導体素子との接合部から延在する方向が、前記境界線が延びる一方向であり、かつ、第2のリードが第2の半導体素子との接合部から延在する方向が、境界線の延びる他方向で、しかも前記互いの延在する方向が平行に配置されている。このように配置することによって、第1、第2の半導体素子および第1、第2のリードを平行かつ同方向に配置した場合と比較して、境界線と平行する方向の半導体素子の長さを短くすることができるので、効率よくスペースを活用でき全体として小型化することができ、加えて封止材の使用量を減らすことができるので重量低減・コスト低減にもなる。さらに、小型化することで半導体装置の変形を抑制できるので、結果として接合材の半田クラックの発生をより抑制でき、半導体装置の信頼性をさらに向上させ、高寿命化することができる。
さらに、第2ベース板における境界線と交差する部分の剛性を、他の部分よりも低くしているので、封止樹脂と第2ベース板との熱膨張係数の差に伴い生じる半導体装置の変形時に、第2ベース板における境界線と交差する部分の剛性の低い部分が応力吸収するため、各リード及び第2ベース板における各接合部の接合材のクラック発生をより抑制でき、半導体装置の信頼性をさらに向上させ、高寿命することができる。
図1は、この発明の実施の形態1による半導体装置を示す平面図、図2は、図1のA−A矢視における半導体装置の断面図、図3は、図1のB−B矢視における半導体装置の断面図、図4は、図1のC−C矢視における半導体装置の変形時の断面図、図8は図1の半導体装置の電気回路図である。以下、各図において同一または相当部分には同一符号を付して説明する。なお、各平面図においては便宜上封止樹脂を簡略化している。
図5はこの発明の実施の形態2による半導体装置を示す平面図、図6は図5のG−G矢視における半導体装置の断面図、図7は図5のG−G矢視における半導体装置の変形時の断面図、図8は図5の半導体装置の電気回路図である。実施の形態2における半導体装置2の構造は、第1および第2のリード31、32を除いては実施の形態1と同じ構造であるため、詳細説明は省略する。
図9は、本発明に係る半導体装置を用いたインバータ装置を示す平面図、図10はこのインバータ装置を含む回転電機の電気回路図である。
また、半導体装置1はその半数が、同心円を構成している平面に垂直な面を対称面として面対称構造を有するように構成され、それぞれが半径方向に交互に配置されている。
図11は、この発明の実施の形態4による半導体装置を示す平面図、図12は図11の半導体装置の電気回路図である。実施の形態1で説明した半導体装置1は、1対の上下アーム81、82を有し、MOS−FET21、22を各アームにそれぞれ1個ずつ有していたが、本発明による半導体装置はこれに限られず2対以上の上下アームを1つの半導体装置に内蔵してもよい。本実施の形態4では、図11および図12に示すように、2対の上下アーム81〜84を1つの半導体装置5が備えている場合について概略構成を説明する。
3 インバータ装置
4 回転電機
11 第1ベース板
12 第2ベース板
121 突起部
13 電流経路部材
131 突起部
21 第1のMOS−FET
211 ドレイン電極
212 ソース電極
22 第2のMOS−FET
221 ドレイン電極
222 ソース電極
31 第1のリード
311 屈曲部
32 第2のリード
321 屈曲部
51 封止樹脂
52 間隙部
61〜66 半田
91 正電圧供給部材
92 負電圧供給部材
Claims (11)
- 導電体からなる第1ベース板と、
前記第1ベース板上に第1電極面が接合材を介して電気的に接合される第1の半導体素子と、
前記第1ベース板と離間し導電体からなる第2ベース板と、
前記第1の半導体素子と隣接するとともに、前記第2ベース板上に第1電極面が接合材を介して電気的に接合される第2の半導体素子と、
前記第1の半導体素子の第2電極面と前記第2ベース板とを接合材を介して電気的に接合する板状金属からなる第1のリードと、
前記第1および第2ベース板のいずれとも離間し、前記両半導体素子の導通電流を外部に授受するための電流経路部材と、
前記第2の半導体素子の第2電極面と前記電流経路部材とを接合材を介して電気的に接合する板状部材からなる第2のリードと、
少なくとも前記各構成部材を封止する封止材と、を備え、
前記第2ベース板は前記第1および第2のリードよりも剛性が高く、かつ前記第1および第2の半導体素子が対向する方向に間隙部を含むとともに、前記両半導体素子が対向していない方向へ延びる境界線が、前記第1および第2の半導体素子が点対称に配置され、
前記第1のリードが前記第1の半導体素子との接合部から延在する方向が、前記境界線が延びる一方向であり、かつ、
前記第2のリードが前記第2の半導体素子との接合部から延在する方向が、前記境界線の延びる他方向で、しかも前記互いの縁在する方向が平行に配置され、前記第2ベース板に
おける前記境界線と交差する部分の剛性を、他の部分よりも低くしたことを特徴とする半導体装置。 - 前記第2ベース板は、前記境界線における間隙部以外の部分と交差することを特徴とする請求項1に記載の半導体装置。
- 前記第2ベース板における前記境界線と交差する部分に、応力を吸収する屈曲部を設けたことを特徴とする請求項1または2に記載の半導体装置。
- 前記第2ベース板における前記第1のリードとの接合部、または前記電流経路部材における前記第2のリードとの接合部の少なくともいずれか一方に突起部を設けたことを特徴とする請求項1から3のいずれかに記載の半導体装置。
- 前記第1または第2のリードにおいて、各々形成された前記両接合部の間の部分を、他の部分よりも剛性を低くしたことを特徴とする請求項4に記載の半導体装置。
- 前記第1または第2のリードにおいて、各々形成された前記接合部の間の部分に応力を吸収する屈曲部を設けたことを特徴とする請求項4または5に記載の半導体装置。
- 前記半導体素子は、MOS−FETであることを特徴とする請求項1から6のいずれかに記載の半導体装置。
- 請求項1から7のいずれかに記載の半導体装置を備えたインバータ装置。
- 同一平面上かつ同心円状に複数配置された前記半導体装置と、
前記半導体装置よりも同心円の内側に向かって前記封止材から露出した前記第1ベース板または前記電流経路部材の一部と、
前記露出した一方の一部と対向するように前記平面上に設けられ、直流電源の一極に接続されるとともに、2以上の前記半導体装置における前記露出した一方の一部とも電気的に接合する一方の電力供給部材と、
を備えたことを特徴とする請求項8に記載のインバータ装置。 - 前記平面に垂直な面を対称面として面対称構造を有し、隣接配置した一対の前記半導体装置と、
前記平面上の前記半導体装置よりも同心円の外側に設けられ、前記直流電源の他極に接続されるとともに、前記露出した他方の一部とも電気的に接合する他方の電力供給部材と、
を備え、
前記露出した他方の一部が前記他方の電力供給部材と電気的に接合される接合部が、前記同心円の中心と前記半導体装置の中心とを結んだ線上からずれた位置で構成されていることを特徴とする請求項9に記載のインバータ装置。 - 請求項8から10のいずれかに記載のインバータ装置を備えた車両用回転電機。
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