JP5654109B2 - 積層実装構造体の製造方法 - Google Patents
積層実装構造体の製造方法 Download PDFInfo
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- 238000000034 method Methods 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 11
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- 239000011347 resin Substances 0.000 description 17
- 229920005989 resin Polymers 0.000 description 17
- 239000010949 copper Substances 0.000 description 8
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- 230000003647 oxidation Effects 0.000 description 4
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- 230000015572 biosynthetic process Effects 0.000 description 3
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- 229910000679 solder Inorganic materials 0.000 description 3
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- 239000007788 liquid Substances 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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- 238000004381 surface treatment Methods 0.000 description 1
- 238000001029 thermal curing Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
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Description
本発明に係る積層実装構造体の製造方法は、回路基板上に被実装部品を実装すると同時に、その中の最も背の高い部品より長い導電部材を、回路基板上の電極に基板と垂直に固定・接続し、導電部材と被実装部品の間隙に樹脂を充填した後、研磨によって導電部材の頭部のみを露出させる。露出した導電部材に対して、第2の基板を接続、もしくは研磨面に印刷によって回路を形成することで、上下の回路基板を電気的、機械的に接続固定するものであって、これにより本発明に係る積層実装構造体が形成される。以下に具体的な実施例について説明する。
実施例3の積層実装構造体70においては、実施例1の絶縁層23と同様に、第1の基板80上の電子部品(不図示)と導電部材81の周囲に樹脂の絶縁材料による絶縁層83が形成されるとともに、この絶縁層83のうち、第1の基板80から遠い面において、導電部材81を接続するように配線88が形成されている。すなわち実施例3においては、実施例1の第2の基板30及び実施例2の第2の基板60のような第2の基板を載置することなく、絶縁層83上に直接配線88を形成している。なお、配線88の形成方法はメッキ、スパッタ、蒸着やインクジェットやディスペンスによる印刷配線を用いれば良い。このような構成としたことにより、第2の基板の基材部分が不要となるため、設計の自由度を上げることができるとともに、積層高さが低くかつ基板主面の面積が小さい積層実装構造体を提供することができる。
次に、積層実装構造体の変形例を説明する。図11(a)、(b)、(c)、(d)は、変形例にかかる積層実装構造体の構成を示している。
上述したように、導電部材21の第1の基板20と逆側の端部は、いくつかの導電部材21がつながった状態で実装することもできる。いくつかの導電部材がつながった状態は、基材100上にCuなどのメッキで導電部材21を形成すること、またはCuなどの導電材料の板100にプレス加工を行うこと等で形成できる(図11(a))。
本例では、連結した導電部材21を第1の基板20と別に製作して、第1の基板20に接続している。図11(b)は、ピン基板接合の状態を示している。そして、図11(c)に示すように、第1の基板20と導電部材21が連結された部分の間に樹脂を塗布、硬化させる。ここで、先に第1の基板20に樹脂を塗布しておいても良い。
その後、導電部材21の端面21a上に形成した金属膜上のバンプ29(図9、図10)を介して第2の基板30を積層接続する。
図12は、変形例に係る積層実装構造体の製造方法の流れを示すフローチャートである。すでに上述している各実施例の工程と同じ内容については、同一の符号を付し、重複する説明は省略する。まず、本変形例において、まず第1の基板20に電子部品26を実装する(ステップS1)。
基材100上の第1の基板20の電子部品26の間に設けられた電極と対向する位置に、Cuをメッキで成長させる。これにより、いくつかの導電部材21の一方の端部が連結された状態を形成する(ステップS2a)。
20 第1の基板
20a 主面
21 導電部材
21a 端部
22 電極
23 絶縁層
23a 上面
24 配線層
26 電子部品
29 バンプ
30 第2の基板
32 電極
34 配線層
36 電子部品
40 積層実装構造体
50 第1の基板
51 導電部材
52 電極
56 電子部品
57 補強部材
60 第2の基板
66 電子部品
70 積層実装構造体
80 第1の基板
81 導電部材
83 絶縁層
88 配線
90 モジュール
Claims (5)
- 第1の部材に、被実装部品を実装する工程と、
前記被実装部品の高さより高い複数の導電部材の一方の端部が基材上で連結された状態を形成する連結工程と、
前記被実装部品を実装した前記第1の部材表面に、前記基材上で連結した前記複数の導電部材の一方の端部とは逆側で且つ一方の端部よりも径が大きい他方の端部を一括して接合し実装する工程と、
前記第1の部材と前記基材との間に補強部材を形成する補強工程と、
前記基材を研磨で除去して、前記複数の導電部材の端部を露出させる研磨工程と、
露出した前記導電部材の端部表面に金属膜を形成する工程と、
前記導電部材の端部表面の金属膜上にバンプを形成する工程と、を備えることを特徴とする積層実装構造体の製造方法。 - 前記積層実装構造体には、複数のモジュールが形成されており、前記複数の導電部材位置を避けてダイシングすることにより個別モジュール化する個片化工程を、更に有することを特徴とする請求項1に記載の積層実装構造体の製造方法。
- 前記連結工程は、前記基材上に導電材料をメッキで成長させることで前記複数の導電部材を形成することを特徴とする請求項1に記載の積層実装構造体の製造方法。
- 前記連結工程は、導電材料の板にプレス加工を行うことで、前記基材と前記基材上で一方の端部が連結した前記複数の導電部材とを形成することを特徴とする請求項1に記載の積層実装構造体の製造方法。
- 前記連結工程は、棒状の複数の導電部材を治具に並べた状態で、前記導電部材の他方の端面にメッキすることで前記基材を形成することを特徴とする請求項1に記載の積層実装構造体の製造方法。
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