JP6172058B2 - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- JP6172058B2 JP6172058B2 JP2014118436A JP2014118436A JP6172058B2 JP 6172058 B2 JP6172058 B2 JP 6172058B2 JP 2014118436 A JP2014118436 A JP 2014118436A JP 2014118436 A JP2014118436 A JP 2014118436A JP 6172058 B2 JP6172058 B2 JP 6172058B2
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- Wire Bonding (AREA)
- Die Bonding (AREA)
Description
本発明の第1実施形態にかかる半導体装置S1について、図1を参照して述べる。この半導体装置は、たとえば自動車などの車両に搭載され、車両用の各種電子装置を駆動するための装置として適用されるものである。
次に、本実施形態の半導体装置S1の製造方法について、図2〜図4も参照して述べる。まず、半導体構造体100および相手部材を用意する用意工程を行う。ここにおいて、本実施形態では、相手部材としての基板電極12は、基板10の一部であるから、半導体構造体100を形成することによって、相手部材である基板電極12も同時に用意されることになる。
このステッチボンディング工程は、図4に示されるように、第1の高さ制御工程(図2(b)参照)と、荷重制御工程(図3(a)参照)と、第2の高さ制御工程(図3(b)参照)との3工程に分けられ、これら3工程を順次行うものである。
ところで、本実施形態によれば、ワイヤ40をチップパッド21に接触させる荷重制御工程では、上記荷重のモニタを行うことにより、ワイヤ40がチップパッド21に接触したことの判断が確保される。それとともに、キャピラリ200がチップパッド21に直接接触するほどキャピラリ200からの荷重が大きくなることが防止される。
本発明の第2実施形態について、図8を参照して述べる。本実施形態は、上記第1実施形態に比べてワイヤボンディング工程におけるチップパッド21へのステッチボンディングを行う工程が相違するものであり、ここでは、この相違点を中心に述べることとする。
なお、上記した各実施形態では、半導体構造体100は、基板10と、基板10の一面11にダイマウント材30を介して接着された半導体チップ20と、半導体チップ20の表面に設けられたチップパッド21と、を備えるものであったが、半導体チップ20やチップパッド21の数は、単数でも複数でもよい。
11 基板の一面
20 半導体チップ
21 チップパッド
30 ダイマウント材
40 ワイヤ
100 半導体構造体
200 キャピラリ
210 キャピラリの先端部
220 キャピラリの内孔
Claims (3)
- 基板(10)、前記基板の一面(11)にダイマウント材(30)を介して接着された半導体チップ(20)、および、前記半導体チップの表面に設けられたチップパッド(21)を備える半導体構造体(100)と、
相手部材(12)と、
ワイヤボンディングにより前記半導体構造体の前記チップパッドと前記相手部材とを結線するワイヤ(40)と、を備え、
前記チップパッドに対して直接ステッチボンディングにより前記ワイヤが接合されたものである半導体装置の製造方法であって、
前記半導体構造体および前記相手部材を用意する用意工程と、
先端部(210)に開口する内孔(220)を有する前記ワイヤボンディング用のキャピラリ(200)を用い、当該内孔に挿入されるとともに当該先端部にて当該内孔から導出された前記ワイヤを、前記キャピラリの先端部によって、前記相手部材および前記チップパッドに押し当てて接合するとともに、前記チップパッドに対してはステッチボンディングにより直接、前記ワイヤを接合するワイヤボンディング工程と、を備え、
前記チップパッドへの前記ステッチボンディングを行う工程は、前記チップパッド上の前記キャピラリの高さをモニタしながら、前記キャピラリの先端部と前記チップパッドとの距離を前記キャピラリの高さとして、前記キャピラリの高さが第1の所定高さ(h1)となるまで、前記キャピラリを下降させる第1の高さ制御工程と、
前記ワイヤを介して前記キャピラリが前記チップパッドに付与する荷重をモニタしながら、前記キャピラリを前記第1の所定高さから下降させることで前記ワイヤを前記チップパッドに接触させるものであって、
前記荷重が、前記キャピラリが前記チップパッドに非接触であって且つ前記ワイヤが前記チップパッドに接触されたものと判断される第1の所定荷重(g1)となるまで、前記キャピラリの下降を行い、前記第1の所定荷重とされた時点の前記キャピラリの高さを基準高さ(h2)とする荷重制御工程と、
前記キャピラリの高さをモニタしながら、前記キャピラリを前記基準高さから下降させるとともに、当該下降中においては前記キャピラリによって前記ワイヤに超音波を付与することにより、前記ワイヤを前記チップパッドに接合する第2の高さ制御工程と、を備えるものであることを特徴とする半導体装置の製造方法。 - 前記荷重制御工程では、前記荷重が前記第1の所定荷重となる前に前記第1の所定荷重よりも小さい第2の所定荷重(g2)となったときの前記キャピラリの高さを仮基準高さ(h3)とし、
前記仮基準高さと前記基準高さとの差に基づいて、前記第2の高さ制御工程において前記キャピラリを前記基準高さから前記チップパッド側に下降させる量を前記キャピラリの下降量として、前記第2の高さ制御工程における前記キャピラリの下降量(C)を決めるようにしたことを特徴とする請求項1に記載の半導体装置の製造方法。 - 前記ダイマウント材の弾性率が0.5MPa以上であることを特徴とする請求項1または2に記載の半導体装置の製造方法。
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JPS57109348A (en) * | 1980-12-26 | 1982-07-07 | Hitachi Ltd | Wire bonding method |
JPS61114541A (ja) * | 1984-11-09 | 1986-06-02 | Toshiba Corp | ワイヤボンデイング方法 |
JP3527637B2 (ja) * | 1998-06-15 | 2004-05-17 | ローム株式会社 | ワイヤボンディングの良否判別方法 |
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