JP5147996B2 - 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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- JP5147996B2 JP5147996B2 JP2011549927A JP2011549927A JP5147996B2 JP 5147996 B2 JP5147996 B2 JP 5147996B2 JP 2011549927 A JP2011549927 A JP 2011549927A JP 2011549927 A JP2011549927 A JP 2011549927A JP 5147996 B2 JP5147996 B2 JP 5147996B2
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- power semiconductor
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- switching element
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- band gap
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- 239000004065 semiconductor Substances 0.000 title claims description 192
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 110
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 110
- 239000000758 substrate Substances 0.000 claims description 36
- 239000003566 sealing material Substances 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000004642 Polyimide Substances 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 239000011737 fluorine Substances 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 2
- 229910002601 GaN Inorganic materials 0.000 claims description 2
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims description 2
- 239000010432 diamond Substances 0.000 claims description 2
- 229910003460 diamond Inorganic materials 0.000 claims description 2
- 229920002379 silicone rubber Polymers 0.000 claims description 2
- 239000004945 silicone rubber Substances 0.000 claims description 2
- 229920002050 silicone resin Polymers 0.000 claims 1
- 239000004020 conductor Substances 0.000 description 12
- 238000001816 cooling Methods 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000017525 heat dissipation Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000012775 heat-sealing material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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Description
図1は、この発明を実施するための実施の形態1における電力用半導体モジュールの断面図であり、電力用半導体モジュールの断面を簡略化して示した図である。図1において、電力用半導体モジュール100は、ベース板1、絶縁基板2、導体パターン3、Si半導体で作製されたSi製スイッチング素子4、ワイドバンドギャップ半導体であるSiC半導体で作製されたSiC製ダイオード5、ワイヤ配線6、主電極7,8、制御端子9,10、ケース11、絶縁封止材12などによって構成されている。Si製スイッチング素子4がSi半導体素子であり、SiC製ダイオード5がワイドバンドギャップ半導体素子である。
図3は、この発明を実施するための実施の形態2における電力用半導体モジュールの内部配置を示す上面図である。図2と同様に、主電極、制御端子、ケース、および絶縁封止材を外した状態で電力用半導体モジュール200を上面から見た図である。実施の形態1では、SiC製ダイオード5が電力用半導体モジュール100の中央領域に配置され、Si製スイッチング素子4が中央領域の両側に配置されていたが、本実施の形態では、Si製スイッチング素子4が中央領域を囲む周辺部に配置(電力用半導体モジュール200の周辺部に配置)されている点が実施の形態1と異なる。
図4は、この発明を実施するための実施の形態3における電力用半導体モジュールの内部配置を示す上面図である。図2と同様に、主電極、制御端子、ケース、および絶縁封止材を外した状態で電力用半導体モジュール300を上面から見た図である。本実施の形態では、Si製スイッチング素子4とSiC製ダイオード5が別々の絶縁基板18,19上に実装されている点が実施の形態1と異なる。Si製スイッチング素子4は、スイッチング素子用絶縁基板18に、SiC製ダイオード5は、ダイオード用絶縁基板19にそれぞれ実装されている。また、Si製スイッチング素子4とSiC製ダイオード5が別々の絶縁基板18,19に実装されるため、スイッチング素子用絶縁基板18の導体パターンとダイオード用絶縁基板19の導体パターンを電気的に接続するワイヤ配線20を別途設けている。なお、ワイヤ配線を用いなくても、電気的に接続されれば良く、例えば、主電極7,8に直接ワイヤ配線にて接続したり、ワイヤ配線を使わずにブスバーを用いた配線にしても良い。
図5は、この発明を実施するための実施の形態4における電力用半導体モジュールの断面図であり、電力用半導体モジュールの断面を簡略化して示した図である。図2と同様に、主電極、制御端子、ケース、および絶縁封止材を外した状態で電力用半導体モジュール400を上面から見た図である。本実施の形態では、Si製スイッチング素子4が実装されたスイッチング素子用絶縁基板18とSiC製ダイオード5が実装されたダイオード用絶縁基板19が別々のベース板21,22上に取り付けられている点が実施の形態3と異なる。Si製スイッチング素子4が実装されたスイッチング素子用絶縁基板18がスイッチング素子用ベース板21に取り付けられ、SiC製ダイオード5が実装されたダイオード用絶縁基板19は、ダイオード用ベース板22に取り付けられている。図5では、ダイオード用ベース板22の両側にスイッチング素子用ベース板21が設けられている。スイッチング素子用ベース板21とダイオード用ベース板22との間は樹脂などの断熱性材料23によって接続されている。また、各ベース板21,22には、取り付け穴17が設けられている。
図6は、この発明を実施するための実施の形態5における電力用半導体モジュールの断面図であり、電力用半導体モジュールの断面を簡略化して示した図である。図6には、主電極および制御端子を示していない。本実施の形態における電力用半導体モジュール500では、ケース11内に充填される絶縁封止材を1種類とせずに、高耐熱絶縁封止材24と低耐熱絶縁封止材25の2種類を用いている点が実施の形態1〜4と異なる。SiC製ダイオード5の周辺には高耐熱絶縁封止材24を用い、Si製スイッチング素子4の周辺など、それ以外の部分には高耐熱封止材24に比べて耐熱性の低い低耐熱絶縁封止材25を用いている。
Claims (11)
- Si半導体素子と、ワイドバンドギャップ半導体素子とを備えた電力用半導体モジュールであって、
前記ワイドバンドギャップ半導体素子は、前記電力用半導体モジュールの中央領域に配置され、
前記Si半導体素子は、前記中央領域の両側または周辺に配置され、前記ワイドバンドギャップ半導体素子の素子数を前記Si半導体素子の素子数よりも多くしたことを特徴とする電力用半導体モジュール。 - 複数のSi半導体素子と、複数のワイドバンドギャップ半導体素子とを備えた電力用半導体モジュールであって、
前記複数のワイドバンドギャップ半導体素子は、前記複数のSi半導体素子に挟まれるように又は囲まれるように配置され、前記ワイドバンドギャップ半導体素子の素子数を前記Si半導体素子の素子数よりも多くしたことを特徴とする電力用半導体モジュール。 - 前記Si半導体素子はスイッチング素子であり、前記ワイドバンドギャップ半導体素子はダイオードであることを特徴とする請求項1または請求項2に記載の電力用半導体モジュール。
- 前記Si半導体素子はダイオードであり、前記ワイドバンドギャップ半導体素子はスイッチング素子であることを特徴とする請求項1または請求項2に記載の電力用半導体モジュール。
- 前記Si半導体素子および前記ワイドバンドギャップ半導体素子は、同一の絶縁基板に実装されたことを特徴とする請求項1〜4のいずれか1項に記載の電力用半導体モジュール。
- 前記Si半導体素子および前記ワイドバンドギャップ半導体素子は、それぞれ別々の絶縁基板に実装されたことを特徴とする請求項1〜4のいずれか1項に記載の電力用半導体モジュール。
- 前記Si半導体素子が実装された絶縁基板および前記ワイドバンドギャップ半導体素子が実装された絶縁基板は、同一のベース板上に設置されたことを特徴とする請求項5または6に記載の電力用半導体モジュール。
- 前記Si半導体素子が実装された絶縁基板および前記ワイドバンドギャップ半導体素子が実装された絶縁基板は、それぞれ別々のベース板上に設置された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。
- 前記ワイドバンドギャップ半導体素子が配置された領域を覆う絶縁封止材は、前記Si半導体素子が配置された領域を覆う絶縁封止材よりも高耐熱特性を有することを特徴とする請求項1〜8のいずれか1項に記載の電力用半導体モジュール。
- 前記ワイドバンドギャップ半導体素子が配置された領域を覆う絶縁封止材は、フッ素系樹脂、ポリイミド、ポリアミド、エポキシ、高耐熱シリコーン系樹脂のいずれかで形成され、前記Si半導体素子が配置された領域を覆う絶縁封止材は、シリコーンゲルまたはシリコーンゴムで形成されたことを特徴とする請求項1〜8のいずれか1項に記載の電力用半導体モジュール。
- 前記ワイドバンドギャップ半導体素子は、シリコンカーバイト、窒化ガリウム系材料、またはダイヤモンドで作製されたことを特徴とする請求項1〜10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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