JP2609724B2 - 半導体装置 - Google Patents

半導体装置

Info

Publication number
JP2609724B2
JP2609724B2 JP1163990A JP16399089A JP2609724B2 JP 2609724 B2 JP2609724 B2 JP 2609724B2 JP 1163990 A JP1163990 A JP 1163990A JP 16399089 A JP16399089 A JP 16399089A JP 2609724 B2 JP2609724 B2 JP 2609724B2
Authority
JP
Japan
Prior art keywords
solder
plate
semiconductor
lead
weight ratio
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP1163990A
Other languages
English (en)
Other versions
JPH0330440A (ja
Inventor
勝嘉 井沢
良一 小林
正之 小沢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1163990A priority Critical patent/JP2609724B2/ja
Priority to KR1019900008973A priority patent/KR0183010B1/ko
Priority to GB9014392A priority patent/GB2233593B/en
Priority to DE4020577A priority patent/DE4020577C3/de
Publication of JPH0330440A publication Critical patent/JPH0330440A/ja
Priority to US07/774,373 priority patent/US5182628A/en
Application granted granted Critical
Publication of JP2609724B2 publication Critical patent/JP2609724B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Die Bonding (AREA)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は半導体装置に関するものである。
〔従来の技術〕
一般に半導体装置の接合部はハンダによつて接合され
ている。このような技術は例えば特開昭61−139047号公
報等に開示されている。
〔発明が解決しようとする課題〕
ところが、上述したような半導体装置においては内燃
機関のエンジンルーム内に配置される場合もあり、熱サ
イクルに対する問題を解決する必要がある。
例えば、従来使用されていた半導体装置においてはい
わゆる高温ハンダと呼ばれるPb/Sn/Ag合金ハンダ（重量
比93.5/5/1.5）を用いていたが、実際に絶縁板と放熱板
の間のハンダにクラツクが生じてしまうといつた問題が
あつた。
本発明の目的は、ハンダにクラックが生ずることを防
ぐことができる半導体装置を提供することにある。
〔課題を解決するための手段〕
上記目的は、アクチュエータを駆動するシリコンの半
導体駆動素子と、前記半導体駆動素子と第１のハンダを
介して結合されたアルミナの絶縁板と、前記絶縁板と第
２のハンダを介して結合された銅またはアルミニウムの
金属放熱板とを備えた半導体装置において、前記第１の
ハンダを、高温とし、前記第２のハンダは前記第１のハ
ンダよりも低い融点のハンダであって重量比 の鉛−スズ合金ハンダとすることによって達成される。
〔作用〕
シリコンの半導体駆動素子とアルミナの絶縁板とを接
合する第１のハンダを高い融点のハンダを用いているた
め、半導体駆動素子の発熱によってもハンダが溶けるこ
とはなく、アルミナの絶縁板と銅またはアルミニウムの
合金放熱板とを接続する第２のハンダを第１のハンダよ
りも低い融点の重量比 を有する鉛−スズ合金ハンダとしているため、熱応力に
よる疲労に耐えられ、クラックが生じなくなる。半導体
駆動素子，絶縁板，金属放熱板を熱膨張率が高い順の材
料で構成し、半導体駆動素子と絶縁板を高温ハンダで結
合し、絶縁板と金属放熱板とを低温ハンダで結合してい
るため、接合部での応力の緩和も図れる。
〔実施例〕
以下本発明の実施例を図面に従い説明する。
第１図は半導体を用いた内燃機関用点火装置の構成図
で、モールドケース１と銅よりなる放熱板80によつて収
納体100が形成されている。ここでモールドケース１と
放熱板80とは接着剤11で接着されている。
収納体100の内部にはパワースイツチ半導体部110と増
幅半導体部120が収納され、それぞれはリード13によつ
て接続されており、更に増幅半導体部120は外部端子12
と接続されている。
増幅半導体部120は増幅回路基板９よりなり、これは
接着剤10により放熱板80に接着固定されている。
一方、パワースイツチ半導体部110は半導体素子２、
放熱機能を有するモリブデン板40、絶縁体であるアルミ
ナ板60よりなり、これらはそれぞれハンダによつて接合
されている。ここで、半導体素子２とモリブデン板40と
は高温ハンダと呼ばれるPb/Sn/Ag合金ハンダ３（重量比
93.5/5/1.5）で接合され、モリブデン板40とアルミナ板
60及び放熱板80の間は重量比 を有する鉛−スズ合金ハンダ７によつて接合されてい
る。
次に、この重量比 を有する鉛−スズ合金ハンダを使用した半導体装置の耐
久試験について実施したので説明する。
耐久試験では厚さ3.2mmのニツケルめつき銅板（放熱
板）上に8.5mm角、厚さ0.5mmのタングステン−ニツケル
めつきアルミナ板及び8.2mm角、厚さ0.25mmの半導体素
子（シリコンチツプ）を配置し、それぞれの間を厚さ10
0μｍの鉛−スズの配分比をかえたハンダによつて接合
した試験を用いて、−55℃状態に11時間放置、＋150℃
状態に１時間放置を１サイクルとしてアルミナ板と銅板
の間にクラツクが生じるサイクル数をプロツトした。
第２図は上述の耐久試験の結果を示しており、横軸は
鉛−スズの重量比、縦軸は平均寿命（クラツクが生じる
までのサイクル数）を示している。
この第２図から理解できるように鉛−スズ合金のハン
ダの重量比が のものを使用するとほぼ2000サイクルに渡つてクラツク
の発生が認められなかつた。
尚、第１図の実施例では放熱板80とアルミナ板60及び
モリブデン板40の間を重量比 の鉛−スズ合金ハンダ７を用いて接合したが、半導体素
子２とモリブデン板40の間も重量比 の鉛−スズ合金ハンダを用いて接合しても良い。
ただ、この重量比 の鉛−スズ合金ハンダは200℃以上では接合力が低下す
る傾向にあるので、できるならば200℃以下の条件が達
成される部分に適用するのが好ましい。
特に、この種の半導体装置においては半導体素子の熱
を逃がすのに絶縁板60、放熱板80に向つて放熱特性を良
くするべく接触面積を大きくしている。したがつて、こ
の大きい接触面積によつてよりクラツクが発生しやすく
なるので、少なくとも放熱板80と絶縁板60の間には重量
比 の鉛−スズ合金ハンダを用いる。
次に第３図ないし第５図に基づいて本発明の実施例の
変形を説明する。
第３図は半導体素子２と酸化ベリリウムよりなる絶縁
板61を高温ハンダ３で接合し、銅板81とアルミニウム板
82を接合した放熱板と先の酸化ベリリウムよりなる絶縁
板61とは重量比 よりなる鉛−スズ合金ハンダ７で接合している。
第４図は半導体素子２と銅よりなる放熱板41及びアル
ミナよりなる絶縁板60とを高温ハンダ３で接合し、アル
ミナよりなる絶縁板60とアルミニウムよりなる放熱板82
とは重量比 の鉛−スズ合金ハンダ７によつて接合している。
第５図は半導体素子２と窒化アルミニウムよりなる絶
縁板62を高温ハンダ３で接合し、窒化アルミニウムより
なる絶縁板62とアルミニウムよりなる放熱板82とは重量
比 の鉛−スズ合金ハンダ７によつて接合されている。
尚、これらの変形例においては絶縁板と放熱板の間を
重量比 の鉛−スズ合金ハンダ７で接合しているが、使用温度が
200℃以下であれば絶縁板と半導体素子の間も重量比 の鉛−スズ合金ハンダで接合しても良いことは先に述べ
た通りである。
また、実施例ではパワースイツチ半導体素子の例につ
いて説明したが、これに限らず他の半導体素子について
も適用が可能である。
〔発明の効果〕
以上述べたように本発明によれば、熱サイクルが加わ
る状態で絶縁板と放熱板の間のハングにクラツクが生じ
ることを少なくでき、実用上きわめて有効な半導体装置
を得ることができる。
【図面の簡単な説明】
第１図は本発明になる半導体装置の構造図、第２図は耐
久試験の結果を示す図、第３図ないし第５図は本発明の
他の変形例を示す図である。 ２……半導体素子、３……高温ハンダ、７……重量比 の鉛−スズ合金ハンダ、60……絶縁板、80……放熱板。
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小沢 正之 茨城県勝田市大字高場2520番地 株式会 社日立製作所佐和工場内 (56)参考文献 特開 昭57−114242（ＪＰ，Ａ) 特開 昭60−10633（ＪＰ，Ａ) 特開 昭61−17355（ＪＰ，Ａ) 特開 昭59−82734（ＪＰ，Ａ) 特開 昭53−44176（ＪＰ，Ａ)

Claims (1)

    (57)【特許請求の範囲】
  1. 【請求項１】アクチュエータを駆動するシリコンの半導
    体駆動素子と、前記半導体駆動素子と第１のハンダを介
    して結合されたアルミナの絶縁板と、前記絶縁板と第２
    のハンダを介して結合された銅またはアルミニウムの金
    属放熱板とを備えた半導体装置において、前記第１のハ
    ンダは高温ハンダであり、前記第２のハンダは前記第１
    のハンダよりも低い融点のハンダであって重量比 の鉛−スズ合金ハンダであることを特徴とする半導体装
    置。
JP1163990A 1989-06-28 1989-06-28 半導体装置 Expired - Fee Related JP2609724B2 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP1163990A JP2609724B2 (ja) 1989-06-28 1989-06-28 半導体装置
KR1019900008973A KR0183010B1 (ko) 1989-06-28 1990-06-19 반도체장치
GB9014392A GB2233593B (en) 1989-06-28 1990-06-28 Semiconductor device
DE4020577A DE4020577C3 (de) 1989-06-28 1990-06-28 Halbleiteranordnung mit Lötverbindung zwischen Halbleiterbauelement, Isolierplatte und Wärmeableitplatte
US07/774,373 US5182628A (en) 1989-06-28 1991-10-10 Semiconductor device having particular solder interconnection arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1163990A JP2609724B2 (ja) 1989-06-28 1989-06-28 半導体装置

Publications (2)

Publication Number Publication Date
JPH0330440A JPH0330440A (ja) 1991-02-08
JP2609724B2 true JP2609724B2 (ja) 1997-05-14

Family

ID=15784666

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1163990A Expired - Fee Related JP2609724B2 (ja) 1989-06-28 1989-06-28 半導体装置

Country Status (4)

Country Link
JP (1) JP2609724B2 (ja)
KR (1) KR0183010B1 (ja)
DE (1) DE4020577C3 (ja)
GB (1) GB2233593B (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05136304A (ja) * 1991-11-14 1993-06-01 Mitsubishi Electric Corp 半導体モジユール及びそれを用いたパワー制御装置
JP2838625B2 (ja) * 1992-09-08 1998-12-16 株式会社日立製作所 半導体モジュール
DE4300516C2 (de) * 1993-01-12 2001-05-17 Ixys Semiconductor Gmbh Leistungshalbleitermodul
KR100322177B1 (ko) 1993-12-27 2002-05-13 이누이 도모지 내연기관용점화장치
DE19609929B4 (de) * 1996-03-14 2006-10-26 Ixys Semiconductor Gmbh Leistungshalbleitermodul

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1122238A (en) * 1964-11-18 1968-07-31 English Electric Co Ltd Semi-conductor device
JPS5344176A (en) * 1976-10-04 1978-04-20 Hitachi Cable Ltd Clad solder for semiconductor device
DE3009925C2 (de) * 1980-03-14 1984-03-08 Siemens AG, 1000 Berlin und 8000 München Kontaktstück für einen elektrischen Vakuumschalter
JPS57114242A (en) * 1981-01-07 1982-07-16 Hitachi Ltd Semiconductor device
JPS5982734A (ja) * 1982-11-04 1984-05-12 Hitachi Ltd 絶縁型半導体装置
JPS6010633A (ja) * 1983-06-30 1985-01-19 Fujitsu Ltd 半導体装置
DE3513530A1 (de) * 1984-06-01 1985-12-05 Bbc Brown Boveri & Cie Verfahren zur herstellung von leistungshalbleitermodulen mit isoliertem aufbau
DE3523808C3 (de) * 1984-07-03 1995-05-04 Hitachi Ltd Verfahren zum Löten von Teilen einer elektronischen Anordnung aus unterschiedlichen Werkstoffen und dessen Verwendung
JPS6117355A (ja) * 1984-07-03 1986-01-25 Hitachi Ltd 異種部材のはんだ接合方法
JPS61139047A (ja) * 1984-12-11 1986-06-26 Toshiba Corp 半導体装置

Also Published As

Publication number Publication date
JPH0330440A (ja) 1991-02-08
KR0183010B1 (ko) 1999-03-20
DE4020577A1 (de) 1991-01-10
GB9014392D0 (en) 1990-08-22
DE4020577C3 (de) 1998-11-12
DE4020577C2 (de) 1994-07-07
KR910001953A (ko) 1991-01-31
GB2233593A (en) 1991-01-16
GB2233593B (en) 1993-11-10

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