JP2016171269A - 電力用半導体装置 - Google Patents
電力用半導体装置 Download PDFInfo
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- JP2016171269A JP2016171269A JP2015051584A JP2015051584A JP2016171269A JP 2016171269 A JP2016171269 A JP 2016171269A JP 2015051584 A JP2015051584 A JP 2015051584A JP 2015051584 A JP2015051584 A JP 2015051584A JP 2016171269 A JP2016171269 A JP 2016171269A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 78
- 239000000758 substrate Substances 0.000 claims abstract description 125
- 238000001816 cooling Methods 0.000 claims abstract description 39
- 239000002184 metal Substances 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 18
- 230000007704 transition Effects 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 5
- 230000017525 heat dissipation Effects 0.000 claims description 32
- 239000003566 sealing material Substances 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 2
- 230000005855 radiation Effects 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 5
- 238000009413 insulation Methods 0.000 abstract 6
- 238000005538 encapsulation Methods 0.000 abstract 2
- 230000004048 modification Effects 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000004519 grease Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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Abstract
【解決手段】絶縁基板10は、金属から作られ放熱面SRを成すベース部11と、絶縁層12と、回路パターン2とを有する。絶縁基板10は室温において放熱面に凸形状の反りを有する。電力用半導体素子3は回路パターン2上に実装されている。封止材7の厚さは絶縁基板10の厚さよりも大きい。封止材7の線膨張係数は、絶縁基板10の実装面SMの面内方向における絶縁基板10の線膨張係数よりも大きい。熱伝導層20は、ベース部11の放熱面SR上に設けられており、室温において固体状であり、室温よりも高い相転移温度以上において液状である。
【選択図】図1
Description
図1を参照して、パワーモジュール101(電力用半導体装置)は、筐体1と、絶縁基板10と、電力用半導体素子3と、金属ワイヤ4(配線部)と、電極5と、封止材7と、熱伝導層20とを有する。
図3は、本実施の形態のパワーモジュール102(電力用半導体装置)の構成を概略的に示す平面図である。図4は、線IV−IV(図3)に沿う概略断面図である。図5はパワーモジュール102の回路図である。なお図3においては、封止材7(図4)の図示を省略しており、また筐体1p(図4)についてはその外縁および貫通孔HL(図4)のみを示している。
図8は、本実施の形態のパワーモジュール103(電力用半導体装置)の構成を概略的に示す平面図である。なお図8においては、封止材7および筐体1p(図4)の図示を省略している。
図10は、本実施の形態のパワーモジュール104(電力用半導体装置)の構成を概略的に示す平面図である。なお図10においては、封止材7および筐体1p(図4)の図示を省略している。
Claims (10)
- 筐体と、
前記筐体に取り付けられ、放熱面と、前記放熱面と反対の実装面とを有し、室温において前記放熱面に凸形状の反りを有する少なくとも1つの絶縁基板とを備え、前記実装面は前記筐体内に収められ、前記絶縁基板は、
金属から作られ、前記放熱面を成すベース部と、
前記ベース部上に設けられた絶縁層と、
前記絶縁層上に設けられ、前記実装面を成す回路パターンとを含み、さらに
前記絶縁基板の回路パターン上に実装された少なくとも1つの電力用半導体素子と、
前記絶縁基板の前記回路パターンのうち前記電力用半導体素子から離れた部分と前記電力用半導体素子との間をつなぐ少なくとも1つの配線部と、
前記筐体に取り付けられ、前記絶縁基板の前記回路パターンおよび前記電力用半導体素子の少なくともいずれかと電気的に接続された複数の電極と、
前記筐体内において前記絶縁基板上で前記電力用半導体素子を封止する封止材とを備え、前記封止材の厚さは前記絶縁基板の厚さよりも大きく、かつ、前記封止材の線膨張係数は、前記絶縁基板の前記実装面の面内方向における前記絶縁基板の線膨張係数よりも大きく、さらに
前記放熱面上に設けられ、室温において固体状であり、室温よりも高い相転移温度以上において液状である熱伝導層を備える、電力用半導体装置。 - 前記絶縁基板は、前記電力用半導体素子の動作温度の上限において、前記放熱面に凹形状の反りを有する、請求項1に記載の電力用半導体装置。
- 前記封止材の線膨張係数は、前記絶縁基板の前記実装面の面内方向における前記絶縁基板の線膨張係数の1.5倍以下である、請求項1または2に記載の電力用半導体装置。
- 前記配線部は金属フレームを含む、請求項1から3のいずれか1項に記載の電力用半導体装置。
- 前記電力用半導体素子は複数の電力用半導体素子を含み、前記絶縁基板は複数の絶縁基板を含む、請求項1から4のいずれか1項に記載の電力用半導体装置。
- 前記複数の絶縁基板は、第1の放熱面を有する第1の絶縁基板と、第2の放熱面を有する第2の絶縁基板と、前記第1の絶縁基板および前記第2の絶縁基板の間に配置され、第3の放熱面を有する第3の絶縁基板とを含み、前記第3の放熱面は前記第1の放熱面および前記第2の放熱面よりも突出している、請求項5に記載の電力用半導体装置。
- 前記複数の絶縁基板の各々に前記電力用半導体素子の1つのみが実装されている、請求項5または6に記載の電力用半導体装置。
- 前記複数の絶縁基板の各々に、互いに電気的に直列に接続された2つ以上の前記電力用半導体素子が実装されている、請求項5または6に記載の電力用半導体装置。
- 前記電極は、
第1の電位が印加される第1の入力電極と、
前記第1の電位と異なる第2の電位が印加される第2の入力電極と、
前記第1の電位および前記第2の電位の間でスイッチングされる電位が出力される出力電極とを含み、
前記絶縁基板は、
前記回路パターンのうち前記第1の入力電極につながれた部分を有する第1の絶縁基板と、
前記回路パターンのうち前記第2の入力電極につながれた部分を有する第2の絶縁基板とを含む、
請求項1から4のいずれか1項に記載の電力用半導体装置。 - 前記熱伝導層を介して前記放熱面上に接する冷却装置をさらに備える、請求項1から9のいずれか1項に記載の電力用半導体装置。
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