JP5467933B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP5467933B2 JP5467933B2 JP2010117219A JP2010117219A JP5467933B2 JP 5467933 B2 JP5467933 B2 JP 5467933B2 JP 2010117219 A JP2010117219 A JP 2010117219A JP 2010117219 A JP2010117219 A JP 2010117219A JP 5467933 B2 JP5467933 B2 JP 5467933B2
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- electrode pattern
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- insulating substrate
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Description
なお、図面は模式的または概念的なものであり、各部分の厚みと幅との関係、部分間の大きさの比係数などは、必ずしも現実のものと同一とは限らない。また、同じ部分を表す場合であっても、図面により互いの寸法や比係数が異なって表される場合もある。
また、本願明細書と各図において、既出の図に関して前述したものと同様の要素には同一の符号を付して詳細な説明は適宜省略する。
図1は、第1の実施の形態に係る半導体装置を説明する模式図である。
同図(a)は、本実施の形態に係る半導体装置110の模式的斜視図、同図(b)は、(a)に示したA−A’線矢視の模式的断面図である。
半導体装置110は、絶縁基板10、第1電極パターン21、第2電極パターン22、半導体素子30、電極端子40及び接続用配線50を備える。
ここで、熱抵抗は、単位時間当たりの発熱量においての温度上昇量を意味する。すなわち、温度の伝えにくさを表す値で、大きいほど熱を伝えにくい。
図2は、比較例に係る半導体装置を説明する模式図である。
同図(a)は、比較例に係る半導体装置190の模式的斜視図、同図(b)は、(a)に示したB−B’線矢視の模式的断面図である。
半導体装置190は、絶縁基板10、電極パターン20、半導体素子30、電極端子40及び接続用配線50を備える。
すなわち、半導体装置190では、絶縁基板10の第1主面10aに、電極パターン20が一体的に設けられている。
一方、電極端子40を接続するはんだH2は、組み立て性容易の観点から、はんだH1よりも低い、例えば183℃の融点を有した共晶はんだが用いられる。
電極端子40は、外部配線(図示せず)と接続されるため、外部配線からの応力を受けやすい。したがって、はんだH2の脆化が発生し、外部配線からの応力がはんだH2に加わると、はんだH2の剥がれ等が発生し、電極端子40と電極パターン20との接続信頼性に影響を及ぼす。
図3は、第1の実施の形態の他の例に係る半導体装置を説明する模式図である。
同図(a)は、本実施の形態に係る半導体装置111の模式的斜視図、同図(b)は、(a)に示したC−C’線矢視の模式的断面図である。
半導体装置111は、絶縁基板10、第1電極パターン21、第2電極パターン22、半導体素子30、電極端子40及び接続用配線51を備える。
図4は、第2の実施の形態に係る半導体装置を説明する模式図である。
同図(a)は、本実施の形態に係る半導体装置120の模式的斜視図、同図(b)は、(a)に示したD−D’線矢視の模式的断面図である。
半導体装置120は、絶縁基板10、第1電極パターン21、第2電極パターン22、半導体素子30、電極端子40及び接続用配線50を備える。
図5は、第2の実施の形態の他の例に係る半導体装置を説明する模式図である。
同図(a)は、本実施の形態に係る半導体装置121の模式的斜視図、同図(b)は、(a)に示したE−E’線矢視の模式的断面図である。
半導体装置121は、絶縁基板10、第1電極パターン21、第2電極パターン22、半導体素子30、電極端子40及び接続用配線51を備える。
図6は、第3の実施の形態の他の例に係る半導体装置を説明する模式図である。
同図(a)は、本実施の形態に係る半導体装置130の模式的斜視図、同図(b)は、(a)に示したF−F’線矢視の模式的断面図である。
半導体装置130は、絶縁基板10、第1電極パターン21、第2電極パターン22、半導体素子30、電極端子40及び接続用配線52を備える。
同図(a)は、図6(a)に示したX1−X1’線矢視の模式的断面図、同図(b)は、図6(a)に示したX2−X2’線矢視の模式的断面図である。
すなわち、図7(a)は、接続用配線52における第1方向Xに沿った断面を模式的に示している。また、図7(b)は、第1電極パターン21における第1方向Xに沿った断面を模式的に示している。
図8は、第4の実施の形態に係る半導体装置を説明する模式的平面図である。
第4の実施の形態に係る半導体装置140は、複数の半導体素子30(30A〜30D)を備えている。
図8に表したように、半導体装置140は、絶縁基板10、第1電極パターン21、第2電極パターン22及び複数の半導体素子30(30A〜30D)を備える。
互いに動作期間が異なる半導体素子30A及び30Bは、第1絶縁基板11に設けられた第1電極パターン21に接続される。また、互いに動作期間が異なる半導体素子30C及び30Dは、第2絶縁基板12に設けられた第2電極パターン22に接続される。
図9は、素子間の熱集中について説明する模式的平面図である。
図9に表した半導体装置191では、4つの半導体素子30(30A〜30D)が、一つの絶縁基板10の上に設けられた電極パターン20に接続されている。この場合、同じタイミングで動作している半導体素子30A及び30Cや、半導体素子30B及び30Dでは、互いの熱が電極パターン20や絶縁基板10を介して伝わり、それぞれの間になる領域HSで熱集中を起こしやすい。
また、半導体装置140では、半導体装置120及び121のように、半導体素子30と電極端子40とが、異なる絶縁基板に設けられていてもよい。
さらに、半導体装置140では、半導体装置130のように、第1電極パターン21と第2電極パターン22との間に、第1電極パターン21よりも断面の面積の小さい接続用配線52が設けられていてもよい。
図10は、第4の実施の形態の他の例に係る半導体装置を説明する模式的平面図である。
第4の実施の形態の他の例に係る半導体装置141は、複数の半導体素子30(30A〜30D)を備えている。
図10に表したように、半導体装置141は、絶縁基板10、電極パターン20及び複数の半導体素子30(30A〜30D)を備える。
図10に例示した半導体装置141では、4つの半導体素子30A〜30Dを備えているが、2つ以上の半導体素子30を備えていればよい。
同図(a)では、隣接する半導体素子30が間隔L1で配置された場合の放熱ルートを例示している。また、同図(b)では、隣接する半導体素子30が間隔L1よりも広い間隔L2で配置された場合の放熱ルートを例示している。
つまり、L>2Dを満たすと、互いの放熱ルートに重なりが発生しないことになる。
図12は、第5の実施の形態に係る半導体ユニットを説明する模式的断面図である。
図12に表したように、半導体ユニット200は、先に説明した半導体装置110、111、120、121及び130のいずれかをパッケージ60内に含む。図8に例示した半導体ユニット200では、第1の実施の形態に係る半導体装置110をパッケージ60内に収容した例を示している。
次に、第6の実施の形態に係る電力用半導体装置について説明する。本実施の形態に係る電力用半導体装置では、上記説明した半導体装置110、111、120、121、130、140及び141の半導体素子30として、電力用半導体素子が用いられている。また、電力用半導体装置としては、上記説明した半導体ユニット200が用いられていてもよい。
図13では、電力用半導体装置300としてインバータ装置の回路を例示している。インバータ装置では、直流電源400から供給される直流電圧を、例えばU相、V相、W相の3相交流に変換して出力する。負荷対象としては、例えばモータ500が用いられる。
インバータ装置は、インバータ回路310と、制御部320と、を備える。インバータ回路310としては、上記説明した半導体装置110、111、120、121、130、140及び141や、半導体ユニット200が用いられる。図13に例示したインバータ装置では、3相の各相に対応して3つの相発生回路310U、310V及び310Wが設けられている。
Claims (5)
- 絶縁基板と、
前記絶縁基板上において、互いにあいだを開けて設けられた第1電極パターン及び第2電極パターンと、
前記第1電極パターンの第1領域に接続された複数の第1半導体素子と、
前記第1電極パターンの第2領域に接続された第1電極端子と、
前記第2電極パターンの第3領域に接続された複数の第2半導体素子と、
前記第2電極パターンの第4領域に接続された第2電極端子と、
前記第1領域及び前記第2領域と電気的に接続し、前記第1電極パターンの熱抵抗よりも大きい熱抵抗を有する第1接続用配線と、
前記第3領域及び前記第4領域とを電気的に接続し、前記第2電極パターンの熱抵抗よりも大きい熱抵抗を有する第2接続用配線と、
前記第1領域と前記第1半導体素子とを接続する第1接続部材と、
前記第2領域と前記第1電極端子とを接続し、前記第1接続部材の融点よりも低い融点を有する第2接続部材と、
を備え、
前記第1領域から前記第2領域へ向かう方向と直交する第1方向において、
前記複数の第1半導体素子のいずれかの素子と前記複数の第2半導体素子のいずれかの素子は並び、
前記複数の第1半導体素子の前記いずれかの前記素子と前記複数の第2半導体素子の前記いずれかの前記素子とは動作期間が異なっていることを特徴とする半導体装置。 - 前記絶縁基板は、前記第1電極パターンが設けられた第1絶縁基板と、前記第2電極パターンが設けられ、前記第1絶縁基板とあいだを開けて設けられた第2絶縁基板と、を有することを特徴とする請求項1記載の半導体装置。
- 前記第1または第2接続用配線における前記第1方向に沿った断面の面積は、前記第1電極パターンの前記第1領域における前記第1方向に沿った断面の面積よりも小さい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1または第2接続用配線の材質は、前記第1電極パターンの材質とは異なることを特徴とする請求項1〜3のいずれか1つに記載の半導体装置。
- 前記第1または第2接続用配線の材質は、前記第1電極パターンの材質と同じであることを特徴とする請求項1〜3のいずれか1つに記載の半導体装置。
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