JP2014067897A - パワー半導体モジュール - Google Patents
パワー半導体モジュール Download PDFInfo
- Publication number
- JP2014067897A JP2014067897A JP2012212651A JP2012212651A JP2014067897A JP 2014067897 A JP2014067897 A JP 2014067897A JP 2012212651 A JP2012212651 A JP 2012212651A JP 2012212651 A JP2012212651 A JP 2012212651A JP 2014067897 A JP2014067897 A JP 2014067897A
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- Prior art keywords
- conductor plate
- power semiconductor
- electrode
- conductor
- semiconductor module
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
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Abstract
【解決手段】第二交流導体板318、直流負極導体板319は、上アームIGBT155、下アームIGBT157のエミッタ電極が形成された第1電極面とそれぞれ対向して配置され、これらのエミッタ電極とそれぞれ電気的に接続される。第2上アーム信号導体324U2、第2下アーム信号導体324L2は、ゲート電極403へのドライブ信号の基準電位を測定するためのケルビンエミッタ電極とそれぞれ電気的に接続される。第二交流導体板318と第2上アーム信号導体324U2とを電気的に接続し、直流負極導体板319と第2下アーム信号導体324L2とを電気的に接続することで、第二交流導体板318および直流負極導体板319の一部をケルビンエミッタ電極としてそれぞれ用いる。
【選択図】図13
Description
図2を用いて、本実施形態による電力変換装置200の回路構成について説明する。図1に示したように、電力変換装置200は、インバータ回路部140や142と、補機用の変換機43と、コンデンサモジュール500とを備えている。補機用の変換機43は、HEV110が備える補機類を駆動するための補機用のモータ195を制御するインバータ装置である。また補機用の変換機43は、DC−DCコンバータであっても良い。DC−DCコンバータは、例えば、バッテリ136の供給電圧を更に昇圧する、あるいは高い電圧からバッテリ136の供給電圧に降圧する、昇圧あるいは降圧回路である。
インバータ回路部140およびインバータ回路部142に使用されるパワー半導体モジュール300の詳細構成を説明する。図3(a)は、本実施形態によるパワー半導体モジュール300の断面図であり、図3(b)は、本実施形態によるパワー半導体モジュール300の斜視図である。
図5(a)は、本実施形態による補助モールド体600の斜視図、図5(b)は補助モールド体600の側面図、図5(c)は図5(b)に示す補助モールド体600のA−A断面図、図5(d)は補助モールド体600の透過図である。図6は、本実施形態によるパワー半導体モジュール300の成型方法の説明図である。この図6では、一次封止金型に補助モールド体600を設置して樹脂を充填する状態を、理解し易いように断面図で示している。
図7(a)は、本実施形態によるモジュール一次封止体300Aの斜視図であり、図7(b)は、モジュール一次封止体300Aをモジュールケース304の中に挿入する様子を示す図である。モジュール一次封止体300Aは、前述の図6(a)〜(c)に示したような方法で作ることができる。このモジュール一次封止体300Aの各導体板には、パワー半導体素子の電極が固着される固着領域322(図4(a)や図4(c)参照)を含む固着面とは反対側に、伝熱面323(図4(b)参照)が設けられている。この伝熱面323は、図7(a)に示すように、モジュール一次封止体300Aの表面から露出している。各導体板は、第一封止樹脂表面337(図7(a)参照)と共に、絶縁シート圧着面338を形成する。絶縁シート圧着面338は、モジュール一次封止体300Aの両面に形成される。これにより、パワー半導体素子の発熱によって発生する熱流は、第一封止樹脂350に阻害されること無く絶縁シート333に拡散して到達する。そのため、パワー半導体素子から絶縁シート333までの熱抵抗を低くできる。
続いて、パワー半導体モジュール300に使用される上アームIGBT155および下アームIGBT157の電極レイアウトを説明する。なお、上アームIGBT155および下アームIGBT157には、同じ構造のIGBTが共通に用いられる。そのため以下では、上アームIGBT155について、これを単にIGBT155と称して電極レイアウトを説明する。
図13は、本実施形態によるパワー半導体モジュール300における上アームIGBT155、上アームダイオード156、下アームIGBT157および下アームダイオード158の各パワー半導体素子と、直流正極導体板315、第一交流導体板316、第二交流導体板318および直流負極導体板319の各導体板と、信号導体324U、324Lとの間の接続レイアウトを示した上面図である。この図13では、接続レイアウトを分かりやすくするため、上記の各パワー半導体素子、各導体板および各信号導体以外のパワー半導体モジュール300の構成は省略されている。
156 上アームダイオード
157 下アームIGBT
158 下アームダイオード
159 中間電極
160 金属接合材料
218 導体板
219 導体板
300 パワー半導体モジュール
304 モジュールケース
305 フィン
315 直流正極導体板
316 第一交流導体板
318 第二交流導体板
319 直流負極導体板
320 交流配線
324L 信号導体
324U 信号導体
327 ワイヤボンディング
333 絶縁シート
350 第一封止樹脂
351 第二封止樹脂
364 絶縁基板
403 ゲート電極
404 ミラーエミッタ電極
405 エミッタ電極
600 補助モールド体
Claims (11)
- ゲート電極およびエミッタ電極が形成された第1電極面と、コレクタ電極が形成された第2電極面とを有するパワー半導体素子と、
前記第1電極面と対向して配置され、前記エミッタ電極と電気的に接続される第1導体板と、
前記第2電極面と対向して配置され、前記コレクタ電極と電気的に接続される第2導体板と、
前記ゲート電極と電気的に接続され、前記ゲート電極への信号を伝送する第1信号導体と、
前記信号の基準電位を測定するためのケルビンエミッタ電極と電気的に接続される第2信号導体と、を備え、
前記第1導体板と前記第2信号導体とを電気的に接続することで、前記第1導体板の一部を前記ケルビンエミッタ電極として用いることを特徴とするパワー半導体モジュール。 - 請求項1に記載のパワー半導体モジュールにおいて、
前記第1導体板は、前記エミッタ電極が固着された固着領域を含む固着面と、前記固着面とは反対側に設けられた伝熱面とを有し、
前記第1導体板は、前記固着領域に対応する前記伝熱面の領域内において、前記第2信号導体と接続されていることを特徴とするパワー半導体モジュール。 - 請求項2に記載のパワー半導体モジュールにおいて、
前記パワー半導体素子、前記第1導体板、前記第2導体板、前記第1信号導体および前記第2信号導体を一体的に封止する封止材をさらに備え、
前記伝熱面は、前記固着面から第1の距離だけ離れた第1伝熱面と、前記固着面から前記第1の距離より小さい第2の距離だけ離れた第2伝熱面とを有し、
前記第2伝熱面に前記第2信号導体との接続部が形成されていることを特徴とするパワー半導体モジュール。 - 請求項3に記載のパワー半導体モジュールにおいて、
前記第1伝熱面は、前記封止材から露出していることを特徴とするパワー半導体モジュール。 - 請求項1に記載のパワー半導体モジュールにおいて、
前記第1導体板は、前記エミッタ電極が固着された固着面と、前記第2信号導体と接合された接合面と、前記固着面および前記接合面とは反対側に設けられた伝熱面とを有することを特徴とするパワー半導体モジュール。 - 請求項5に記載のパワー半導体モジュールにおいて、
前記パワー半導体素子、前記第1導体板、前記第2導体板、前記第1信号導体および前記第2信号導体を一体的に封止する封止材をさらに備え、
前記伝熱面は、前記封止材から露出していることを特徴とするパワー半導体モジュール。 - 請求項1乃至3、5のいずれか一項に記載のパワー半導体モジュールにおいて、
アノード電極およびカソード電極を有するダイオードと、
前記第1電極面および前記アノード電極と対向して配置された第3導体板と、
前記アノード電極と前記第3導体板との間に配置され、一方の面に前記アノード電極が固着され、他方の面が前記第3導体板と接合される第4導体板と、をさらに備え、
前記第1導体板は、前記第1電極面と前記第3導体板との間に配置され、一方の面に前記エミッタ電極が固着され、他方の面が前記第3導体板と接合されており、
前記第3導体板は、前記第1導体板および前記第4導体板と接合されている面とは反対側の面が前記封止材から露出していることを特徴とするパワー半導体モジュール。 - 請求項1乃至6のいずれか一項に記載のパワー半導体モジュールにおいて、
前記ゲート電極と前記第1信号導体は、ワイヤボンディングを介して電気的に接続されることを特徴とするパワー半導体モジュール。 - 請求項1乃至6のいずれか一項に記載のパワー半導体モジュールにおいて、
前記第1導体板と前記第2信号導体は、ワイヤボンディングまたははんだ材を介して、あるいは溶接されることで、電気的に接続されることを特徴とするパワー半導体モジュール。 - 請求項1乃至6のいずれか一項に記載のパワー半導体モジュールにおいて、
前記ゲート電極は、前記第1電極面の隅部または周縁部に形成されていることを特徴とするパワー半導体モジュール。 - 請求項1乃至6のいずれか一項に記載のパワー半導体モジュールにおいて、
前記第1電極面には、前記エミッタ電極に流れる電流を測定するためのミラーエミッタ電極がさらに形成されていることを特徴とするパワー半導体モジュール。
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