JP6775597B2 - 半導体装置およびその製造方法ならびに無線通信機器 - Google Patents
半導体装置およびその製造方法ならびに無線通信機器 Download PDFInfo
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Description
平面部分を有する熱伝導板とを備えている。伝熱シートは、樹脂に熱伝導性粒子が添加されている。平面を有する熱伝導板は、電磁波吸収シートと伝熱シートとの間に介在する。熱伝導性粒子が、熱伝導板における平面部分に接触している。電磁波吸収シートは、電子部品の少なくとも側部に接触する態様で、電子部品を覆うように配置されている。電磁波吸収シートは、電子部品を覆うように配置されている。電磁波吸収シートは、電子部品の少なくとも側部に接触している。
本発明に係る半導体装置の製造方法は、以下の工程を有している。配線板に電子部品を実装する。電子部品に接触する態様で熱伝導部材を配置する。熱伝導部材に接触する態様で放熱部材を配置する。熱伝導部材を配置する工程は、電磁波吸収シートを配置する工程と、樹脂に熱伝導性粒子を添加した伝熱シートを配置する工程と、平面部分を有する熱伝導板を配置する工程とを備えている。電磁波吸収シートを配置する工程は、電磁波吸収シートを、電子部品を覆うように配置する工程と、電磁波吸収シートを、電子部品の少なくとも側部に接触させる工程とを含む。熱伝導板を配置する工程では、熱伝導板は、電磁波吸収シートと伝熱シートとに接触する態様で、電磁波吸収シートと伝熱シートとの間に配置される。放熱部材を配置する工程では、放熱部材によって、熱伝導部材が電子部品に向かって押圧される。
実施の形態1に係る半導体装置について説明する。図1に示すように、半導体装置1では、配線板5が、支持部材21の表面に接着層19によって接合されている。接着層19として、たとえば、導電性接着剤、または、はんだ等が適用される。
Rbi=ti/(λiAi) ・・・式(2)
式(1)および式(2)において、Rbiは、部材i内の熱抵抗であり、バルク熱抵抗と呼ばれる。Rciは、部材iの界面における熱抵抗を示し、接触熱抵抗と呼ばれる。部材iを通過する熱量を大きくするには、熱抵抗Riを小さくする必要がある。
上述した半導体装置1では、電子部品3として、電子部品3の下面に外部と電気的な接続を行うための電極(図示せず)が配置された電子部品を例に挙げて説明した。電子部品としては、この種のものに限られず、たとえば、電子部品(ボディー)の側面からリード電極が突出した電子部品についても適用することが可能である。
実施の形態2に係る半導体装置として、複数の電子部品が配線板に搭載された半導体装置の一例について説明する。
実施の形態3に係る半導体装置として、電子部品の側面と上面を覆う熱伝導板を有する半導体装置の一例について説明する。
実施の形態4に係る半導体装置として、金属粒子を含有した伝熱シートを適用した半導体装置の一例について説明する。
実施の形態5に係る半導体装置について説明する。図19に示すように、半導体装置1では、配線板5に実装された電子部品3の上面に接触するように、伝熱シート15が配置されている。その伝熱シート15に接触するように、熱伝導板13が配置されている。その熱伝導板13に接触するとともに、電子部品3の側面に接触する態様で、電子部品3および熱伝導板13等を覆うように、電磁波吸収シート11が配置されている。電磁波吸収シート11に接触するように、放熱部材17が配置されている。
実施の形態6に係る半導体装置として、電子部品の側面および上面と、配線板の上面とに接触するように伝熱シートを適用した半導体装置の一例について説明する。
Claims (12)
- 配線板と、
前記配線板に実装された電子部品と、
前記電子部品と距離を隔てて配置された放熱部材と、
前記放熱部材と前記電子部品との間に介在し、前記電子部品において発生した熱を前記放熱部材に伝導させる熱伝導部材と
を有し、
前記熱伝導部材は、
電磁波吸収シートと、
樹脂に熱伝導性粒子を添加した伝熱シートと、
前記電磁波吸収シートと前記伝熱シートとの間に介在する、平面部分を有する熱伝導板と
を備え、
前記熱伝導性粒子が、前記熱伝導板における前記平面部分に接触し、
前記電磁波吸収シートは、前記電子部品を覆うように配置され、
前記電磁波吸収シートは、前記電子部品の少なくとも側部に接触している、半導体装置。 - 前記熱伝導板は、前記電子部品を、前記配線板に前記電子部品が実装された状態で上から平面視した場合の面積よりも大きく、
前記伝熱シートに接触する前記熱伝導板の前記平面部分の表面粗さ、および、前記伝熱シートに接触する前記放熱部材の接触面の表面粗さは、5μm以下である、請求項1記載の半導体装置。 - 前記電磁波吸収シートは、前記電子部品の上部に接触するように配置された、請求項1記載の半導体装置。
- 前記熱伝導板は、前記電子部品の上部を覆う前記電磁波吸収シートの部分に接触するように配置された、請求項3記載の半導体装置。
- 前記熱伝導板は、前記電子部品の上部を覆う前記電磁波吸収シートの部分、および、前記電子部品の側部を覆う前記電磁波吸収シートの部分に接触するように配置された、請求項3記載の半導体装置。
- 前記伝熱シートは、前記配線板、前記熱伝導板の上部および前記熱伝導板の側部ならびに前記放熱部材に接触するように配置された、請求項3記載の半導体装置。
- 前記伝熱シートは、金属粒子を含有する、請求項1記載の半導体装置。
- 前記伝熱シートは、前記電子部品の上部に接触するように配置され、
前記熱伝導板は、前記伝熱シートに接触するように配置され、
前記電磁波吸収シートは、前記熱伝導板に接触するように配置された、請求項1記載の半導体装置。 - 前記伝熱シートが接触している前記電子部品の前記上部における接触面の表面粗さは5μm以下である、請求項8記載の半導体装置。
- 請求項1〜9のいずれか1項に記載の半導体装置を備えた、無線通信機器。
- 配線板に電子部品を実装する工程と、
前記電子部品に接触する態様で熱伝導部材を配置する工程と、
前記熱伝導部材に接触する態様で放熱部材を配置する工程と
を有し、
前記熱伝導部材を配置する工程は、
電磁波吸収シートを配置する工程と、
樹脂に熱伝導性粒子を添加した伝熱シートを配置する工程と、
平面部分を有する熱伝導板を配置する工程と
を備え、
前記電磁波吸収シートを配置する工程は、
前記電磁波吸収シートを、前記電子部品を覆うように配置する工程と、
前記電磁波吸収シートを、前記電子部品の少なくとも側部に接触させる工程と
を含み、
前記熱伝導板を配置する工程では、前記熱伝導板は、前記電磁波吸収シートと前記伝熱シートとに接触する態様で、前記電磁波吸収シートと前記伝熱シートとの間に配置され、
前記放熱部材を配置する工程では、前記放熱部材によって、前記熱伝導部材が前記電子部品に向かって押圧される、半導体装置の製造方法。 - 前記熱伝導板は、0.2mm以上の厚さを有する銅板である、請求項1〜9のいずれか1項に記載の半導体装置。
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