JP4413206B2 - 半導体装置およびその製造方法 - Google Patents
半導体装置およびその製造方法 Download PDFInfo
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- JP4413206B2 JP4413206B2 JP2006173798A JP2006173798A JP4413206B2 JP 4413206 B2 JP4413206 B2 JP 4413206B2 JP 2006173798 A JP2006173798 A JP 2006173798A JP 2006173798 A JP2006173798 A JP 2006173798A JP 4413206 B2 JP4413206 B2 JP 4413206B2
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Description
は、パッケージ用基板の上に半導体チップを実装し、それを樹脂モールディングした後、反対側の面に外部端子としてハンダボールをエリア状に形成したものである。BGAでは、実装エリアが面で達成されるので、パッケージを比較的容易に小型化することができる。また、回路基板側でも狭ピッチ対応とする必要がなく、高精度な実装技術も不要となるので、BGAを用いると、パッケージコストが多少高い場合でもトータルな実装コストとしては低減することが可能となる。
そして、絶縁膜の表面に微小突起郡が形成されているため、絶縁膜とその上部に設けられる封止樹脂等との間の界面密着性が顕著に改善され、歩留まりおよび素子信頼性が向上する。
また、絶縁膜に凹部が設けられ、パッド電極は凹部の内部に設けられ、凹部の内壁とパッド電極の側面との間に空隙部が設けられた構成とする。こうすることにより、絶縁膜上部に設けられる封止樹脂等との密着性が良好となる。また、パッド電極上に絶縁膜材料のかす等が付着しにくくなり、パッド電極上のボンディングの信頼性が向上する。
(i)コアレスで実装できるため、トランジスタ、IC、LSIの小型・薄型化を実現できる。
(ii)トランジスタからシステムLSI、さらにチップタイプのコンデンサや抵抗を回路形成
し、パッケージングすることができるため、高度なSIP(System in Package)を実現で
きる。
(iii)現有の半導体チップを組合せできるため、システムLSIを短期間に開発できる。
(iv)単層ISB構造とした場合、半導体ベアチップが直下の銅材に直接マウントされており、良好な放熱性を得ることができる。
(v)回路配線が銅材でありコア材がないため、低誘電率の回路配線となり、高速データ転
送や高周波回路で優れた特性を発揮する。
(vi)電極がパッケージの内部に埋め込まれる構造のため、電極材料のパーティクルコンタミの発生を抑制できる。
(vii)パッケージサイズはフリーであり、1個あたりの廃材を64ピンのSQFPパッケージと比較すると、約1/10の量となるため、環境負荷を低減できる。
(viii)部品を載せるプリント回路基板から、機能の入った回路基板へと、新しい概念のシステム構成を実現できる。
(ix)ISBのパターン設計は、プリント回路基板のパターン設計と同じように容易であり、
セットメーカーのエンジニアが自ら設計できる。
バイアス: 無印加
プラズマガス: アルゴン10〜20sccm、酸素0〜10sccm
このプラズマ照射により、配線407の表面が清浄化され、ソルダーレジスト層408の表面が改質するとともに、ポリイミド保護膜からなる素子410の表面が改質し、これらの表面に微小突起が形成される。ソルダーレジスト層408の表面および素子410の表面には、平均直径1〜10nm、数密度1×103μm-2程度の微小突起群が形成され
る。
Claims (6)
- 基材と、
前記基材に設けられた導体回路と、
前記基材の少なくとも一部を覆う絶縁膜と、
前記絶縁膜に設けられた凹部と、
前記凹部の内部に設けられるとともに前記導体回路に接続するパッド電極と、
前記絶縁膜の表面に形成された微小突起群と、
前記絶縁膜の上に形成された半導体チップと、
前記パッド電極および前記半導体チップを電気的に接続する導電部材と、
を備え、
前記パッド電極は、電極膜と、該電極膜の側面を含む表面を覆う導電性保護膜とを含み、前記導電部材の一端が前記導電性保護膜に接して形成され、前記パッド電極を構成する前記導電性保護膜の側壁と前記凹部の内壁との間に空隙部が設けられたことを特徴とする半導体装置。 - 請求項1に記載の半導体装置において、
前記パッド電極、前記絶縁膜、前記空隙部、前記導電部材及び前記半導体チップを覆ったモールド材料をさらに備えることを特徴とする半導体装置。 - 請求項1または2に記載の半導体装置において、
前記絶縁膜の表面がプラズマ処理面であって、前記導電性保護膜の表面が耐プラズマ性材料からなることを特徴とする半導体装置。 - 請求項1〜3のうちいずれか1項に記載の半導体装置において、
前記導電性保護膜は、前記電極膜上に形成された密着膜と、該密着膜上に形成された被覆膜とを含むことを特徴とする半導体装置。 - 導体回路と、
基材の少なくとも一部を覆う絶縁膜と、
前記基材の表面または前記絶縁膜の表面に、電極膜と該電極膜の側面を含む表面を覆う導電性保護膜とを含み、前記導体回路に接続するパッド電極とを形成した基材を用意する工程と、
前記絶縁膜の表面および前記導電性保護膜の表面が露出した状態でプラズマ処理を行う工程と、
を含むことを特徴とする半導体装置の製造方法。 - 請求項5に記載の半導体装置の製造方法において、
さらに、前記プラズマ処理を行う工程の後に、前記パッド電極、前記絶縁膜、前記空隙部、前記導電部材及び前記半導体チップをモールド材料で覆う工程を備えることを特徴とする半導体装置の製造方法。
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