JP4895054B2 - 電子部品の実装方法 - Google Patents
電子部品の実装方法 Download PDFInfo
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- JP4895054B2 JP4895054B2 JP2008221629A JP2008221629A JP4895054B2 JP 4895054 B2 JP4895054 B2 JP 4895054B2 JP 2008221629 A JP2008221629 A JP 2008221629A JP 2008221629 A JP2008221629 A JP 2008221629A JP 4895054 B2 JP4895054 B2 JP 4895054B2
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- layer
- wiring
- electrode
- resin
- semiconductor device
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Description
前記電極の少なくとも一部を避けた状態となるように前記ウエーハに応力緩和層を設ける工程と、
前記電極から前記応力緩和層の上にかけて配線を形成する工程と、
前記応力緩和層の上方で前記配線に接続される外部電極を形成する工程と、
前記ウエーハを個々の個片に切断する工程と、
を有する。
前記プレートは、前記半導体チップと該半導体チップが実装される基板との間の熱膨張係数を有してもよい。
前記外部電極の形成面に前記外部電極が含まれるまで感光性樹脂を塗布し成膜する工程と、
前記感光性樹脂に対して前記外部電極が露出するまで等方性のエッチングを行う工程と、を有してもよい。
前記外部電極の形成面に前記外部電極が含まれるまで有機膜を塗布し成膜する工程を有してもよい。
前記導電層の上に電気メッキでハンダ部を形成する工程と、
前記導電層を前記配線に加工する工程と、
前記ハンダ部を前記外部電極に成形加工する工程と、
を含んでもよい。
前記外部電極を形成する工程の前において、前記保護膜の前記外部電極に対応する少なくとも一部の領域に開口部を形成する工程と、を更に有し、
前記外部電極を形成する工程では、前記開口部にハンダクリームを印刷し且つウェットバックさせることにより前記外部電極を形成してもよい。
前記外部電極を形成する工程の前において、前記保護膜の前記外部電極に対応する少なくとも一部の領域に開口部を形成する工程と、を更に有し、
前記外部電極を形成する工程では、前記開口部内にフラックスを塗布した後に前記各々の開口部に個片のハンダを搭載させることにより前記外部電極を形成してもよい。
前記面において、前記バンプが含まれるまで樹脂を塗布する工程と、
前記樹脂の表面に対して等方性のドライエッチングを行う工程と、
前記ウエーハを個々の個片に切断する工程と、
を含み、
前記ドライエッチングの工程は、前記バンプが露出し前記面が露出する前に終了する。
前記基板状の電子素子の少なくとも外部電極の形成される領域に応力緩和層を設ける工程と、
前記応力緩和層の上に前記外部電極を形成する工程と、
前記基板状の電子素子を個々の個片に切断する工程と、
を有する。
前記実装面において、前記バンプが含まれるまで樹脂を塗布する工程と、
前記樹脂の表面に対して等方性のドライエッチングを行う工程と、
を含み、
前記ドライエッチングの工程は、前記バンプが露出し前記実装面が露出する前に終了する。
前記面において、前記バンプが含まれるまで樹脂を塗布する工程と、
前記樹脂の表面に対して等方性のドライエッチングを行う工程と、
前記電子素子板を個々の個片に切断する工程と、
を含み、
前記ドライエッチングの工程は、前記バンプが露出し前記実装面が露出する前に終了する。
と、前記バンプの少なくとも上端部を避けて前記実装面を覆う樹脂と、を有する。
前記半導体チップの上において前記電極の少なくとも一部を避けるように設けられる応力緩和層と、
前記電極から前記応力緩和層の上にかけて形成される配線と、
前記応力緩和層の上方で前記配線に形成される外部電極と、
を有する。
を含む。
図5は、本実施形態に係る半導体装置を示す平面図である。この半導体装置は、いわゆるCSPに分類されるもので、半導体チップ1の周辺部に形成された電極12から、能動面1aの中央方向に配線3が形成され、各配線3には外部電極5が設けられている。全ての外部電極5は、応力緩和層7の上に設けられているので、回路基板(図示せず)に実装されたときの応力の緩和を図ることができる。また、外部電極5を除く領域には、保護膜としてソルダレジスト層8が形成されている。
配線3<電極12
となっているが、
電極12≦配線3
とすることが好ましい。特に、
電極12<配線3
となる場合には、配線3の抵抗値が小さくなるばかりか、強度が増すので断線が防止される。
理や、酸又はアルカリによるウエット処理を行うことで、樹脂層14の表面を荒らすことができる。
図6A〜図7Cは、第2実施形態に係る半導体装置の製造方法を説明する図である。本実施形態は、第1実施形態と比べて、図3A以降の工程において異なり、図2Eまでの工程は第1実施形態と同様である。したがって、図6Aに示すウエーハ110、電極112、樹脂層114、クローム(Cr)層116、銅(Cu)層120、レジスト層122及び台座124は、図2Eに示すウエーハ10、電極12、樹脂層14、クローム(Cr)層16、銅(Cu)層20、レジスト層22及び台座124と同様であり、製造方法も図1A〜図2Eに示すものと同様のため、説明を省略する。
図8A〜図9Dは、第3実施形態に係る半導体装置の製造方法を説明する図である。
図10は、第4実施形態に係る半導体装置の製造方法を説明する図である。
図11A〜図12Cは、第5実施形態に係る半導体装置の製造方法を説明する図である。
図13A〜図13Dは、第6実施形態に係る半導体装置の製造方法を説明する図である。本例では応力緩和層として、あらかじめ板状に形成されたポリイミド板を選択した。特に、ポリイミドにはヤング率の低い組成のものが存在するので、その組成のものを応力緩和層として選択した。なおそのほかにも例えばプラスチック板やガラスエポキシ系等の複合板を用いてもよい。この場合、実装基板と同材料を用いると熱膨張係数に差がなくなり好ましい。特に今日では実装基板としてプラスチック基板が多いため、プラスチック板を応力緩和層に用いることは有効である。
図14A〜図17Cは、第7実施形態に係る半導体装置の製造方法を説明する図であり、図18のI−I線断面に対応する。なお、図18は、第7実施形態に係る半導体装置を示す図である。
図19A及び図19Bは、第8実施形態に係る半導体装置の実装方法を説明する図である。ここで、半導体装置300は、バンプ230の上からフラックス層232が形成されている点を除き、図17Cに示す半導体装置200と同様の構成である。すなわち、半導体チップ234の電極236から配線238を引き込み、ピッチ変換をして、配線238にバンプ230が形成されている。また、配線238は、応力緩和層240の上に形成されているので、バンプ230に加えられる応力を緩和することができる。
本発明は、上記実施形態に限定されるものではなく、種々の変形が可能である。例えば、上記実施形態は、半導体装置に本発明を適用したが、能動部品か受動部品かを問わず、種々の面実装用の電子部品に本発明を適用することができる。
Claims (4)
- 第1の面を有する半導体チップと、前記第1の面に設けられた電極と、前記第1の面に設けられた応力緩和層と、前記電極から前記応力緩和層にかけて設けられた配線と、前記応力緩和層の上方で前記配線に接続されるバンプと、を有する半導体装置を用意する工程と、
前記第1の面に前記バンプが含まれるまでフラックスを塗布する工程と、
回路基板の配線上に、前記フラックスを介して前記バンプを載置してから行われるリフロー工程と、
を含み、
前記リフロー工程では、前記バンプと前記配線とが接する部分のフラックスが消費され、前記第1の面の上の前記バンプと前記配線とが接する部分以外の部分に前記フラックスが残り、残った前記フラックスが熱可塑性高分子樹脂となるように、リフローを行うことを特徴とする電子部品の実装方法。 - 請求項1記載の電子部品の実装方法において、
前記フラックスを塗布する工程は、スピンコートによって行われる電子部品の実装方法。 - 請求項1または請求項2のいずれかに記載の電子部品の実装方法において、
前記フラックスは、加熱されると熱可塑性高分子樹脂に変化するものからなることを特徴とする電子部品の実装方法。 - 第1の面を有する半導体チップと、前記第1の面に設けられた電極と、前記第1の面に設けられた樹脂層と、前記電極から前記樹脂層にかけて設けられた配線と、前記樹脂層の上方で前記配線に接続されるバンプと、を有する半導体装置を用意する工程と、
前記第1の面に前記バンプが含まれるまでフラックスを塗布する工程と、
回路基板の配線上に、前記フラックスを介して前記バンプを載置してから行われるリフロー工程と、
を含み、
前記リフロー工程では、前記バンプと前記配線とが接する部分のフラックスが消費され、前記第1の面の上の前記バンプと前記配線とが接する部分以外の部分に前記フラックスが残り、残った前記フラックスが熱可塑性高分子樹脂となるように、リフローを行うことを特徴とする電子部品の実装方法。
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Also Published As
Publication number | Publication date |
---|---|
US20040180486A1 (en) | 2004-09-16 |
US6475896B1 (en) | 2002-11-05 |
US7511362B2 (en) | 2009-03-31 |
US20060131705A1 (en) | 2006-06-22 |
HK1018719A1 (en) | 1999-12-30 |
US7049686B2 (en) | 2006-05-23 |
US20100273311A1 (en) | 2010-10-28 |
US20030096449A1 (en) | 2003-05-22 |
KR20050008840A (ko) | 2005-01-21 |
CN1210621A (zh) | 1999-03-10 |
JP2009021620A (ja) | 2009-01-29 |
US8115284B2 (en) | 2012-02-14 |
US20060097369A1 (en) | 2006-05-11 |
TW480636B (en) | 2002-03-21 |
KR100549844B1 (ko) | 2006-02-06 |
CN1519896A (zh) | 2004-08-11 |
US7888260B2 (en) | 2011-02-15 |
US6730589B2 (en) | 2004-05-04 |
US7470979B2 (en) | 2008-12-30 |
US20110095432A1 (en) | 2011-04-28 |
KR100540524B1 (ko) | 2006-01-11 |
CN1227721C (zh) | 2005-11-16 |
WO1998025297A1 (fr) | 1998-06-11 |
US20090181521A1 (en) | 2009-07-16 |
KR20050065686A (ko) | 2005-06-29 |
AU5136398A (en) | 1998-06-29 |
US7842598B2 (en) | 2010-11-30 |
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