JP6510897B2 - 配線基板及びその製造方法と電子部品装置 - Google Patents
配線基板及びその製造方法と電子部品装置 Download PDFInfo
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- JP6510897B2 JP6510897B2 JP2015116522A JP2015116522A JP6510897B2 JP 6510897 B2 JP6510897 B2 JP 6510897B2 JP 2015116522 A JP2015116522 A JP 2015116522A JP 2015116522 A JP2015116522 A JP 2015116522A JP 6510897 B2 JP6510897 B2 JP 6510897B2
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- metal
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Description
図3〜図11は実施形態の配線基板の製造方法を説明するための図、図12及び図13は実施形態の配線基板を示す図、図14及び図15は実施形態の電子部品装置を説明するための図である。
図16にはその他の実施形態の配線基板1aが示されている。図16の配線基板1aが前述した図12の配線基板1と異なる点は、パッドPの上面SXの高さが第1絶縁層40の上面の高さとほぼ同じに設定されていることにある。図16の配線基板1aの他の要素は図12の配線基板1と同じである。
Claims (10)
- 絶縁層と、
前記絶縁層に埋め込まれて配置され、上面全体が前記絶縁層から露出し、側面及び下面が前記絶縁層で被覆されたパッドと、
前記パッド上に形成された金属ポストと、
を有し、
前記パッドは、
凹部と、
前記凹部の上面よりも上方に突出する凸部と、
を有し、
前記金属ポストの、前記凸部の上面に接続される付け根にくびれ部が設けられていることを特徴とする配線基板。 - 前記金属ポストの上面の高さは、前記絶縁層の上面の高さよりも高いことを特徴とする請求項1に記載の配線基板。
- 前記金属ポストの面積は前記パッドの面積よりも小さいことを特徴とする請求項1又は2に記載の配線基板。
- 前記金属ポストの上端縁部は曲面部となっていることを特徴とする請求項1乃至3のいずれか一項に記載の配線基板。
- 前記金属ポストは、前記パッドの上に配置された金属箔と、前記金属箔の上に配置された金属めっき部とから形成され、
前記金属箔の側面が前記金属めっき部の側面から内側に後退して前記くびれ部が形成されていることを特徴とする請求項1乃至4のいずれか一項に記載の配線基板。 - 絶縁層と、
前記絶縁層に埋め込まれて配置され、上面全体が前記絶縁層から露出し、側面及び下面が前記絶縁層で被覆されたパッドと、
前記パッド上に形成された金属ポストと、
を備えた配線基板と、
前記金属ポストにはんだを介して端子が接続された電子部品と、
前記電子部品と前記配線基板との間に形成された封止樹脂と
を有し、
前記パッドは、
凹部と、
前記凹部の上面よりも上方に突出する凸部と、
を有し、
前記金属ポストの、前記凸部の上面に接続される付け根にくびれ部が設けられていることを特徴とする電子部品装置。 - 剥離できる状態で金属箔が形成された仮基板を用意する工程と、
前記仮基板上の金属箔の上に、パッドを有する配線層を形成する工程と、
前記金属箔から前記仮基板を剥離する工程と、
電解めっきに基づいて、前記パッド上の前記金属箔の上に金属めっき部を形成する工程と、
前記金属めっき部をマスクにして前記金属箔をウェットエッチングして、前記パッドの上に、前記金属めっき部とウェットエッチング後の前記金属箔とが積層された金属ポストを形成する工程と、
前記金属ポストをマスクにして前記パッドをウェットエッチングして、前記パッドに、凹部と、前記凹部の上面よりも上方に突出する凸部と、を形成する工程と、
を有し、
前記金属箔のウェットエッチング及び前記パッドのウェットエッチングの際に、前記金属ポストの、前記凸部の上面に接続される付け根にくびれ部を形成することを特徴とする配線基板の製造方法。 - 前記金属めっき部を形成する工程は、
前記金属箔の上に、前記パッド上の領域に開口部が配置されためっきレジスト層を形成する工程と、
前記めっきレジスト層の開口部に前記金属めっき部を形成する工程と、
前記めっきレジスト層を除去する工程と
を含むことを特徴とする請求項7に記載の配線基板の製造方法。 - 前記金属めっき部を形成する工程において、
前記金属めっき部の面積は、前記パッドの面積よりも小さいことを特徴とする請求項7又は8に記載の配線基板の製造方法。 - 前記金属箔及び前記金属めっき部は銅から形成され、
前記金属箔をウェットエッチングする工程において、エッチャントとして硫酸と過酸化水素水との混合液が使用されることを特徴とする請求項7乃至9のいずれか一項に記載の配線基板の製造方法。
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