JP6222909B2 - 積層型半導体装置、プリント回路板、及びプリント配線板の接合構造 - Google Patents
積層型半導体装置、プリント回路板、及びプリント配線板の接合構造 Download PDFInfo
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- JP6222909B2 JP6222909B2 JP2012205973A JP2012205973A JP6222909B2 JP 6222909 B2 JP6222909 B2 JP 6222909B2 JP 2012205973 A JP2012205973 A JP 2012205973A JP 2012205973 A JP2012205973 A JP 2012205973A JP 6222909 B2 JP6222909 B2 JP 6222909B2
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Description
図1は、本発明の第1実施形態に係るプリント回路板の概略構成を示す説明図である。図1(a)は、プリント回路板の全体の概略断面図であり、図1(b)は接合部分の部分拡大図である。
次に、本発明の第2実施形態に係る接合体を適用したプリント回路板について説明する。図3は、本発明の第2実施形態に係るプリント回路板の概略構成を示す説明図である。図3(a)は、プリント回路板の全体の概略断面図であり、図3(b)は接合部分の部分拡大図である。なお、上記実施形態と同様の構成については、同一符号を付してその説明を省略する。
次に、本発明の第3参考形態に係る接合体を適用したプリント回路板について説明する。図5は、本発明の第3参考形態に係るプリント回路板の概略構成を示す説明図である。図5(a)は、プリント回路板の全体を示す概略断面図であり、図5(b)は接合部分の部分拡大図である。なお、上記実施形態と同様の構成については、同一符号を付してその説明を省略する。
次に、本発明の第4実施形態に係る接合体を適用したプリント回路板について説明する。図7は、本発明の第4実施形態に係るプリント回路板の概略構成を示す説明図である。なお、上記実施形態と同様の構成については、同一符号を付してその説明を省略する。
次に、本発明の第5実施形態に係る接合体を適用したプリント回路板について説明する。上記第1〜第4実施形態では、インターポーザとプリント配線板との接合に接合体を用いた場合について説明したが、本第5実施形態では、積層型半導体装置において、インターポーザ間の接合に接合体を用いた場合について説明する。図8は、本発明の第5実施形態に係るプリント回路板の概略構成を示す説明図である。なお、上記実施形態と同様の構成については、同一符号を付してその説明を省略する。
本実施例1では、図1に示す上記第1実施形態の構成において、半導体装置4とプリント配線板3の信頼性試験時の熱変形を測定し、接合体70を用いた場合に信頼性試験で発生するひずみをシミュレーションにより算出した。以下、具体的な寸法値である。
本実施例2では、図3に示す上記第2実施形態の構成において、実施例1と同様に、信頼性試験下での半導体装置4とプリント配線板3の熱変形を測定し、その時に接合体70Aに発生するひずみを算出した。
本参考例3では、図5に示す上記第3参考形態の構成において、信頼性試験下での半導体装置4とプリント配線板3の熱変形を測定し、その時に接合構造に発生するひずみを算出した。半導体装置4とプリント配線板3を0.4mm間隔で配列可能なφ240μmのはんだボールを介して接合した。温度サイクル環境下での熱変形を測定し、ひずみ値を算出した。半導体装置4とプリント配線板3の熱変形の測定方法および接合体70Bに発生するひずみの算出方法は実施例1と同じである。
本実施例4では、図8に示す上記第5実施形態の構成において、スクリーン印刷によってインターポーザ22に金属粒子を含むペーストを供給し、リフロー加熱によって金属粒子集合体10Dを形成後、インターポーザ22とインターポーザ32とを接合した。その後、接合体80Dの高さを測定した。
Claims (8)
- 第1の半導体素子と、前記第1の半導体素子が実装され、一方の表面に第1の電極パッドが形成され、他方の表面に外部と接続するための外部電極が形成された第1のインターポーザとを有する第1の半導体装置と、
第2の半導体素子と、前記第2の半導体素子が実装され、前記第1のインターポーザに対向する表面に第2の電極パッドが形成された第2のインターポーザとを有する第2の半導体装置と、
前記第1の電極パッドと前記第2の電極パッドとを接合する接合体と、を備えた積層型半導体装置において、
前記接合体は、はんだ層と、前記第1及び第2の電極パッドのうち、少なくとも一方の電極パッドに接合された金属層とが積層されてなり、
前記金属層は、複数の金属粒子が隙間を有した状態で一体化し前記少なくとも一方の電極パッドに接合した金属粒子集合体と、該金属粒子集合体の金属粒子の一部が外部に露出するように金属粒子間の隙間を埋め前記少なくとも一方の電極パッドに接合したはんだとからなり、前記はんだ層の嵩上げをする台座として機能していることを特徴とする積層型半導体装置。 - 前記金属粒子集合体の融点は、前記はんだの融点よりも高いことを特徴とする請求項1に記載の積層型半導体装置。
- 前記金属粒子は、銅もしくは銅合金からなることを特徴とする請求項1または2に記載の積層型半導体装置。
- 請求項1乃至3のいずれか1項に記載の積層型半導体装置と、
前記積層型半導体装置が実装されたプリント配線板と、を備えたプリント回路板。 - 一方の表面に第1の電極パッドが形成されたプリント配線板と、
半導体素子と、前記半導体素子が実装され、前記プリント配線板に対向する表面に第2の電極パッドが形成されたインターポーザとを有する半導体装置と、
前記第1の電極パッドと前記第2の電極パッドとを接合する接合体と、を備えたプリント回路板において、
前記接合体は、はんだ層と、前記第1及び第2の電極パッドのうち、少なくとも一方の電極パッドに接合された金属層とが積層されてなり、
前記金属層は、複数の金属粒子が隙間を有した状態で一体化し前記少なくとも一方の電極パッドに接合した金属粒子集合体と、該金属粒子集合体の金属粒子の一部が外部に露出するように金属粒子間の隙間を埋め前記少なくとも一方の電極パッドに接合したはんだとからなり、前記はんだ層の嵩上げをする台座として機能していることを特徴とするプリント回路板。 - 前記金属粒子集合体の融点は、前記はんだの融点よりも高いことを特徴とする請求項5に記載のプリント回路板。
- 前記金属粒子は、銅もしくは銅合金からなることを特徴とする請求項5または6に記載のプリント回路板。
- 片面に第1の電極パッドが形成された第1のプリント配線板と、
前記第1のプリント配線板に対向する片面に第2の電極パッドが形成された第2のプリント配線板と、
第1の電極パッドと第2の電極パッドを接合する接合体と、を有するプリント配線板の接合構造において、
前記接合体は、はんだ層と、前記第1及び第2の電極パッドのうち、少なくとも一方の電極パッドに接合された金属層とが積層されてなり、
前記金属層は、複数の金属粒子が隙間を有した状態で一体化し前記少なくとも一方の電極パッドに接合した金属粒子集合体と、該金属粒子集合体の金属粒子の一部が外部に露出するように金属粒子間の隙間を埋め前記少なくとも一方の電極パッドに接合したはんだとからなり、前記はんだ層の嵩上げをする台座として機能していることを特徴とするプリント配線板の接合構造。
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