JP6719569B2 - 半導体装置および電力変換装置 - Google Patents
半導体装置および電力変換装置 Download PDFInfo
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- JP6719569B2 JP6719569B2 JP2018541082A JP2018541082A JP6719569B2 JP 6719569 B2 JP6719569 B2 JP 6719569B2 JP 2018541082 A JP2018541082 A JP 2018541082A JP 2018541082 A JP2018541082 A JP 2018541082A JP 6719569 B2 JP6719569 B2 JP 6719569B2
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- silicone rubber
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- H01L23/24—Fillings characterised by the material, its physical or chemical properties, or its arrangement within the complete device solid or gel at the normal operating temperature of the device
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Description
図1は、この発明の実施の形態1における半導体装置を示す上面構造模式図である。図2は、この発明の実施の形態1における半導体装置を示す断面構造模式図である。図1において、シリコーン組成物である第一の充填材9を透過して上面側から半導体装置100を見た図であり、第二の充填材10に覆われている絶縁基板52の周縁部(外周部)を点線で表している。
本実施の形態2においては、実施の形態1で用いた絶縁回路基板5をケース内に複数個配置した点が異なる。その他の点については、実施の形態1と同様であるので、詳しい説明は省略する。このように、ケース内に絶縁回路基板を複数個配置した場合においても、絶縁回路基板の周縁部をシリコーンゴムで充填したので、半導体装置の絶縁信頼性を向上させることが可能となる。
本実施の形態3においては、実施の形態1、2で用いた絶縁回路基板5の周囲を区画壁で囲んだ点が異なる。その他の点については、実施の形態1と同様であるので、詳しい説明は省略する。このように、絶縁回路基板の周囲を区画壁で囲むことで絶縁信頼性に影響を与え、シリコーンゴムでの充填が必要な領域を充填したので、半導体装置の絶縁信頼性を向上させることが可能となる。
本実施の形態4は、上述した実施の形態1から3にかかる半導体装置を電力変換装置に適用したものである。本発明は特定の電力変換装置に限定されるものではないが、以下、実施の形態4として、三相のインバータに本発明を適用した場合について説明する。
実施の形態1〜3に対応する構造の評価用サンプル(半導体装置)を用いて、充填するゴム材料、充填するゴム材料の高さ、狭ギャップ領域間隔、を変更し、初期およびヒートサイクル試験回数にともなう半導体装置の絶縁特性を評価した結果を示す。ヒートサイクル試験は、半導体装置全体を、温度制御が可能な恒温曹に入れ、恒温曹の温度を−40℃から180℃の間で繰り返し変化させて実施した。ヒートサイクル試験は、評価用サンプルを−40℃で30分間保持し、その後200℃で30分間保持することを1サイクルとし、このサイクルを1000回繰り返す。
実施の形態1に対応する評価用サンプルは、ベース板1のサイズが100×150mmの金属板に、11×12mmの半導体素子と、50×60mmサイズの絶縁回路基板5(セラミックス製)を接合材であるはんだ3を介して取り付け、ボンディングワイヤ6として径が0.4mm、0.2mmのアルミワイヤを使用した。この金属板1に、インサート成型により作製されたケース部材2を接着剤により取り付けた後に、シリコーンゴム10を各種の高さまで充填し、シリコーンゲル9の硬さが針入度で70の充填シリコーンゲル9を上面へ充填することで作製した。
実施の形態1,2に対応する評価用サンプルは、ベース板のサイズは、100×150mmの金属板に、11×12mmの半導体素子と、50×60mmサイズの絶縁回路基板(セラミックス製)を接合材としてはんだを介して取り付け、ボンディングワイヤには径が0.4mm、0.2mmのアルミワイヤを使用した。この金属板に、インサート成型により作製されたケース部材を接着剤により取り付けた後に、粘度の異なる各種のシリコーンゴムを充填し、シリコーンゲルの硬さが針入度で70のシリコーンゲルをシリコーンゴムの上面へ充填することで作製した。
Claims (12)
- 上面と下面とに導体層を有し、前記上面において前記導体層は複数箇所に設けられた複数の導体層として構成され、前記複数の導体層の少なくとも1つに半導体素子が搭載された絶縁基板と、
前記下面の前記導体層と接合されたベース板と、
前記絶縁基板を囲み、前記ベース板の前記下面の前記導体層が接合された面に接着されたケース部材と、
前記ベース板と前記ケース部材とで囲まれた領域に充填されたシリコーン組成物である第一の充填材と、
前記領域内の前記第一の充填材の下部であって、かつ、前記絶縁基板の周縁部を囲む領域および前記上面の前記複数の導体層間の領域において、前記ベース板からの高さが前記上面よりも高く、前記上面の前記複数の導体層の前記半導体素子との接合面よりも低い領域に充填され、前記半導体素子が搭載された前記上面の前記複数の導体層の側面で前記第一の充填材と接し、前記第一の充填材よりも硬いシリコーン組成物である第二の充填材と、
を備えたことを特徴とする半導体装置。 - 上面と下面とに導体層を有し、前記上面の前記導体層に半導体素子が搭載された絶縁基板と、
前記下面の前記導体層と接合されたベース板と、
前記絶縁基板を囲み、前記ベース板の前記下面の前記導体層が接合された面に接着されたケース部材と、
前記ベース板と前記ケース部材とで囲まれた領域に充填されたシリコーン組成物である第一の充填材と、
前記領域内の前記第一の充填材の下部であって、かつ、前記絶縁基板の周縁部を囲む領域および前記上面の複数の導体層間の領域において、前記ベース板からの高さが前記上面よりも高く、前記上面の前記導体層の前記半導体素子との接合面よりも低い領域に充填され、前記半導体素子が搭載された前記上面の前記複数の導体層の側面で前記第一の充填材と接し、前記第一の充填材よりも硬いシリコーン組成物である第二の充填材と、
を備え
前記絶縁基板の外周全周に区画壁を設け、前記区画壁内部に前記第二の充填材を充填したことを特徴とする半導体装置。 - 前記ケース部材と前記絶縁基板との間隔よりも狭く、前記絶縁基板の端部から前記区画壁までの距離が2mm以上10mm未満であることを特徴とする請求項2に記載の半導体装置。
- 前記第二の充填材の粘度は、0.5Pa・s以上20Pa・s以下であることを特徴とする請求項1〜3のいずれか1項に記載の半導体装置。
- 前記導体層から露出した前記絶縁基板の沿面距離は1mm以上で、前記第二の充填材が充填された前記ベース板から前記絶縁基板の下面の沿面部までの距離が0.3mm以上1mm以下であることを特徴とする請求項1〜4のいずれか1項に記載の半導体装置。
- 前記ケース部材と前記絶縁基板との間隔は、2mm以上10mm以下であることを特徴とする請求項1〜5のいずれか1項に記載の半導体装置。
- 前記第二の充填材の硬度は、ショアA硬度で10以上70以下であることを特徴とする請求項1〜6のいずれか1項に記載の半導体装置。
- 前記第一の充填材の硬度は、針入度で20以上100以下であることを特徴とする請求項1〜7のいずれか1項に記載の半導体装置。
- 前記絶縁基板は、前記ベース板上に複数個接合されたことを特徴とする請求項1〜8のいずれか1項に記載の半導体装置。
- 前記ベース板上に複数個接合された前記絶縁基板のそれぞれの間隔が、2mm以上10mm以下で配置されたことを特徴とする請求項9に記載の半導体装置。
- 前記第一の充填材は、シリコーンゲルであり、前記第二の充填材はシリコーンゴムであることを特徴とする請求項1〜10のいずれか1項に記載の半導体装置。
- 請求項1〜11のいずれか1項に記載の半導体装置を有し、入力される電力を変換して出力する主変換回路と、
前記主変換回路を制御する制御信号を前記主変換回路に出力する制御回路と、
を備えた電力変換装置。
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JP7014012B2 (ja) * | 2018-03-30 | 2022-02-01 | 三菱電機株式会社 | 半導体装置、半導体装置の製造方法および電力変換装置 |
WO2019229894A1 (ja) * | 2018-05-30 | 2019-12-05 | 三菱電機株式会社 | 半導体モジュールおよび電力変換装置 |
DE112018007723T5 (de) | 2018-06-12 | 2021-02-25 | Mitsubishi Electric Corporation | Leistungshalbleitermodul und leistungswandlervorrichtung |
JP6567241B1 (ja) * | 2018-06-12 | 2019-08-28 | 三菱電機株式会社 | パワー半導体モジュール及び電力変換装置 |
US20220223546A1 (en) * | 2019-06-19 | 2022-07-14 | Mitsubishi Electric Corporation | Semiconductor device and power converter |
JP7106007B2 (ja) * | 2019-07-11 | 2022-07-25 | 三菱電機株式会社 | 半導体装置および電力変換装置 |
JP7170614B2 (ja) * | 2019-09-18 | 2022-11-14 | 株式会社東芝 | 半導体装置 |
JP6841367B1 (ja) * | 2020-07-14 | 2021-03-10 | 富士電機株式会社 | 半導体モジュール、電力変換装置及び半導体モジュールの製造方法 |
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JP2001244386A (ja) | 2000-02-28 | 2001-09-07 | Hitachi Ltd | パワー半導体モジュール |
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JP2006318980A (ja) | 2005-05-10 | 2006-11-24 | Toyota Industries Corp | 半導体装置および半導体装置の製造方法 |
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JP4525636B2 (ja) * | 2006-06-09 | 2010-08-18 | 株式会社日立製作所 | パワーモジュール |
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JP2012151342A (ja) | 2011-01-20 | 2012-08-09 | Aisin Aw Co Ltd | 半導体装置 |
JP2014130875A (ja) | 2012-12-28 | 2014-07-10 | Mitsubishi Electric Corp | 半導体装置およびその製造方法 |
JP6540324B2 (ja) * | 2015-07-23 | 2019-07-10 | 富士電機株式会社 | 半導体モジュール及び半導体モジュールの製造方法 |
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