JP2009182272A - 素子搭載用基板およびその製造方法、半導体モジュールおよびその製造方法、ならびに携帯機器 - Google Patents
素子搭載用基板およびその製造方法、半導体モジュールおよびその製造方法、ならびに携帯機器 Download PDFInfo
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Abstract
【解決手段】素子搭載用基板10は、絶縁樹脂層12と、絶縁樹脂層12の一方の主表面に設けられた配線層14と、配線層14と電気的に接続され、配線層14から絶縁樹脂層12側に突出している突起電極16と、を備える。突起電極16の側面には凹凸が形成され、突起電極16の頂部面よりも側面の方が表面粗さが大きくなっている。
【選択図】図1
Description
図1は、実施形態1に係る素子搭載用基板10およびこれを用いた半導体モジュール30の構成を示す概略断面図である。半導体モジュール30は、素子搭載用基板10およびこれに搭載された半導体素子50を備える。
図2(A)〜(G)は、本実施形態における突起電極16の形成方法を示す工程断面図である。
上述の手順により形成した半導体モジュール30(実施例)と、突起電極の表面に粗化処理を施さなかった半導体モジュール(比較例)について、JIS C 0025に規定されている熱衝撃試験を行った結果を表1に示す。表1において、実施例および比較例における表面の凹凸の程度は、以下のようにして測定した。すなわち、まず突起電極の側断面のSEM(走査型電子顕微鏡)画像上で、突起電極の側面および頂部面について、それぞれ任意の10箇所に2点間の直線距離が5μmとなるように2点を設定した。そして、設定した2点間の突起電極表面に沿った道のりを実測した。そして、実測された道のりの値を5μmで除して凹凸の程度を求めた。
上述の実施形態1では、金属板として圧延銅からなる銅板13を用いたが、本実施形態では金属板として圧延金属だけでなく電解金属を用いることができる点が実施形態1と異なる。以下、本実施形態について説明する。なお、突起電極16と素子電極52の接続方法は実施形態1と同様であり、実施形態1と同一の構成については同一の符号を付し、その説明は省略する。
次に、本発明の半導体モジュールを備えた携帯機器について説明する。なお、携帯機器として携帯電話に搭載する例を示すが、たとえば、個人用携帯情報端末(PDA)、デジタルビデオカメラ(DVC)、及びデジタルスチルカメラ(DSC)といった電子機器であってもよい。
Claims (11)
- 絶縁樹脂層と、
前記絶縁樹脂層の一方の主表面に設けられた配線層と、
前記配線層と電気的に接続され、前記配線層から前記絶縁樹脂層側に突出している突起電極と、を備え、
前記突起電極の側面に凹凸が形成され、前記突起電極の頂部面よりも前記側面の方が表面粗さが大きいことを特徴とする素子搭載用基板。 - 前記凹凸は、前記側面上の任意の2点間の直線距離に対する、前記2点間の凹凸の表面に沿った道のりの割合が、1.22より大きいものであることを特徴とする請求項1に記載の素子搭載用基板。
- 前記側面の表面粗さRmaxは、1.0〜2.0μmであることを特徴とする請求項1に記載の素子搭載用基板。
- 前記突起電極は、圧延金属からなることを特徴とする請求項1ないし3のいずれか1項に記載の素子搭載用基板。
- 請求項1ないし4のいずれか1項に記載の素子搭載用基板と、
前記突起電極に対向する素子電極が設けられた半導体素子と、
を備え、
前記突起電極が前記絶縁樹脂層を貫通し、前記突起電極と前記素子電極とが電気的に接続されていることを特徴とする半導体モジュール。 - 請求項5に記載の半導体モジュールを搭載したことを特徴とする携帯機器。
- 突起電極が突設され、圧延金属からなる金属板を準備する工程と、
前記突起電極の側面に凹凸を形成する粗化工程と、
前記突起電極が形成された側の前記金属板の主表面に絶縁樹脂層を積層する工程と、
前記金属板を選択的に除去して配線層を形成する工程と、
を含むことを特徴とする素子搭載用基板の製造方法。 - 金属板の一方の主表面における所定の領域に金属層を形成する工程と、
前記金属層をマスクとして、前記金属層が形成された側の前記金属板の主表面を選択的に除去して突起電極を形成する工程と、
前記突起電極の側面に凹凸を形成する粗化工程と、
前記突起電極が形成された側の前記金属板の主表面に絶縁樹脂層を積層する工程と、
前記金属板を選択的に除去して配線層を形成する工程と、
を含むことを特徴とする素子搭載用基板の製造方法。 - 突起電極が突設され、圧延金属からなる金属板を準備する工程と、
前記突起電極の側面に凹凸を形成する粗化工程と、
前記金属板と、前記突起電極に対応する素子電極が設けられた半導体素子とを、絶縁樹脂層を介して圧着し、前記突起電極が前記絶縁樹脂層を貫通することにより、前記突起電極と前記素子電極とを電気的に接続させる圧着工程と、
前記金属板を選択的に除去して配線層を形成する工程と、
を含むことを特徴とする半導体モジュールの製造方法。 - 金属板の一方の主表面における所定の領域に金属層を形成する工程と、
前記金属層をマスクとして、前記金属層が形成された側の前記金属板の主表面を選択的に除去して突起電極を形成する工程と、
前記突起電極の側面に凹凸を形成する粗化工程と、
前記金属板と、前記突起電極に対応する素子電極が設けられた半導体素子とを、絶縁樹脂層を介して圧着し、前記突起電極が前記絶縁樹脂層を貫通することにより、前記突起電極と前記素子電極とを電気的に接続させる圧着工程と、
前記金属板を選択的に除去して配線層を形成する工程と、
を含むことを特徴とする半導体モジュールの製造方法。 - 前記絶縁樹脂層は、加圧によって塑性流動を起こすことを特徴とする請求項9または10に記載の半導体モジュールの製造方法。
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JP2012064981A (ja) * | 2011-12-27 | 2012-03-29 | Sanyo Electric Co Ltd | 素子搭載用基板、素子搭載用基板の製造方法、半導体モジュールおよび半導体モジュールの製造方法 |
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