JP6639934B2 - 配線基板、半導体装置及び配線基板の製造方法 - Google Patents
配線基板、半導体装置及び配線基板の製造方法 Download PDFInfo
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- JP6639934B2 JP6639934B2 JP2016021698A JP2016021698A JP6639934B2 JP 6639934 B2 JP6639934 B2 JP 6639934B2 JP 2016021698 A JP2016021698 A JP 2016021698A JP 2016021698 A JP2016021698 A JP 2016021698A JP 6639934 B2 JP6639934 B2 JP 6639934B2
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Description
なお、添付図面は、部分的に拡大して示している場合があり、寸法、比率などは実際と異なる場合がある。また、断面図では、各部材の断面構造を分かりやすくするために、一部のハッチングを省略している。
半導体装置90は、配線基板20と、配線基板20に実装された半導体チップ91と、配線基板20と半導体チップ91との間のアンダーフィル樹脂95と、バンプ96とを有している。
なお、各図の説明に必要な部材について符号を付し、説明しない部材については符号を省略する場合がある。
所定の厚さのコア基板31に貫通孔32を形成する。貫通孔32の形成には、例えばレーザ加工機やドリル機を用いることができる。例えば、レーザ加工機により貫通孔32を形成した場合、デスミア処理を行い、貫通孔32内に残留する樹脂スミア等を除去する。デスミア処理として、例えば過マンガン酸カリウム等を用いることができる。
図9(b)に示す工程では、配線基板20のパッドP2上にバンプ96を形成する。また、図9(b)に示す工程では、回路形成面に形成された接続端子92と、その接続端子92の下面に形成された接合部材93とを有する半導体チップ91を準備する。続いて、パッドP1上に、半導体チップ91をフリップチップ接合する。
以上の製造工程により、図3に示した半導体装置90を製造することができる。
(1)開口部34の各角部の周囲に、その角部を構成する開口部34の2つの辺に沿ってL字形に連続して形成された貫通孔35(貫通孔36)を開口部34と離間して形成し、その貫通孔35を充填する絶縁材60を形成した。これにより、絶縁材60の熱硬化後の冷却時に、開口部34の角部における外周縁が外側に引っ張られるため、応力の集中する電子部品50の角部にかかる圧縮応力を緩和することができる。したがって、その圧縮応力に起因して電子部品50の周辺が座屈変形することを抑制でき、絶縁材60の第1面60A及び第2面60Bに凹凸が形成されることを抑制できる。
尚、上記実施形態は、以下の態様で実施してもよい。
・上記実施形態に対し、配線基板20に実装される半導体チップ91の数、その半導体チップ91の実装の形態(例えば、フリップチップ実装、ワイヤボンディングによる実装、又はこれらの組み合わせ)を適宜変更してもよい。
・上記実施形態の電子部品50としては、半導体チップに限らず、チップコンデンサ、チップ抵抗、インダクタ、薄膜コンデンサ等を採用してもよい。
・上記各実施形態並びに各変形例は適宜組み合わせてもよい。
21 コア部
22,23 配線部
31 コア基板
31A 第1面
31B 第2面
31D 橋部
34 開口部
35 貫通孔
36 貫通孔(第1貫通孔)
37 貫通孔(第2貫通孔)
50 電子部品
60 絶縁材
90 半導体装置
91 半導体チップ
100 フィルム
101,102 絶縁樹脂
Claims (9)
- コア基板と、
前記コア基板の第1面と該第1面と反対側の第2面との間を貫通し、平面形状が矩形状に形成された開口部と、
前記コア基板の第1面と第2面との間を貫通し、前記開口部と離間して形成された複数の第1貫通孔と、
前記開口部内に配置された電子部品と、
前記第1貫通孔に充填された第1絶縁材と、
前記開口部の内面と前記電子部品との間に充填された第2絶縁材と、を有し、
前記第1貫通孔は、平面視において、前記開口部の角部の周囲に、前記角部を構成する前記開口部の2つの辺に沿ってL字形に連続して形成されており、
前記第1絶縁材の弾性率は、前記コア基板の弾性率よりも低いこと、
を特徴とする配線基板。 - コア基板と、
前記コア基板の第1面と該第1面と反対側の第2面との間を貫通し、平面形状が矩形状に形成された開口部と、
前記コア基板の第1面と第2面との間を貫通し、前記開口部と離間して形成された複数の第1貫通孔と、
前記開口部内に配置された電子部品と、
前記第1貫通孔に充填された第1絶縁材と、
前記開口部の内面と前記電子部品との間に充填された第2絶縁材と、を有し、
前記第1貫通孔は、平面視において、前記開口部の角部の周囲に、前記角部を構成する前記開口部の2つの辺に沿ってL字形に連続して形成されており、
前記第1絶縁材の熱膨張率は、前記コア基板の熱膨張率よりも高いこと、
を特徴とする配線基板。 - 前記コア基板の第1面と第2面との間を貫通し、前記開口部及び前記第1貫通孔と離間して形成された複数の第2貫通孔を有し、
前記複数の第2貫通孔は、平面視において、隣接する前記第1貫通孔の間に、前記開口部の各辺に沿って並設され、
前記各第2貫通孔は、対向する前記辺に沿って長手が延びる長孔状に形成され、
前記第1絶縁材は、前記第2貫通孔に充填されていること、
を特徴とする請求項1又は2に記載の配線基板。 - 前記開口部の各辺の周囲に複数列の前記第2貫通孔が配列され、
前記コア基板は、各列に配置された前記第2貫通孔同士の間に設けられた橋部を有し、
前記第2貫通孔の短手方向に隣接する2列の前記第2貫通孔は、前記2列のうち一方の列に設けられた前記橋部と、前記2列のうち他方の列に設けられた前記第2貫通孔とが対向するように配列されていることを特徴とする請求項3に記載の配線基板。 - 前記開口部の各辺の周囲に複数列の前記第2貫通孔が配列され、
前記第2貫通孔の短手方向に隣接する2つの前記第2貫通孔の間の長さは、前記第2貫通孔の短手方向の長さと同じ、又は前記第2貫通孔の短手方向の長さよりも長いこと、を特徴とする請求項3又は4に記載の配線基板。 - 前記開口部の各辺の周囲にM列の前記第2貫通孔が配列され、前記開口部の各角部の周囲に前記M列よりも多いN列の前記第1貫通孔が配列されていること、を特徴とする請求項3〜5のいずれか一項に記載の配線基板。
- 前記第1貫通孔の幅は、前記第2貫通孔の短手方向の長さよりも広く設定されていること、を特徴とする請求項3〜6のいずれか一項に記載の配線基板。
- 請求項1〜7のいずれか一項に記載の配線基板と、
前記コア基板の第1面側に形成された配線部に実装された半導体チップと、を有し、
前記第1貫通孔は、前記コア基板の第2面側から前記コア基板の第1面側に向かうに連れて幅が小さくなるように形成されていること、を特徴とする半導体装置。 - コア基板を準備する工程と、
前記コア基板の第1面と該第1面と反対側の第2面との間を貫通する開口部と、前記コア基板の第1面と第2面との間を貫通する第1貫通孔とを互いに離間して形成する工程と、
前記開口部を覆うフィルムを、前記コア基板の第1面側に貼着する工程と、
前記開口部内に電子部品を配置し、前記電子部品を前記フィルム上に固定する工程と、
前記第1貫通孔を充填する第1絶縁材を形成する工程と、
前記開口部を充填し、前記電子部品を固定する第2絶縁材を形成する工程と、
前記コア基板から前記フィルムを剥離する工程と、を有し、
前記開口部の平面形状は矩形状に形成され、
前記第1貫通孔は、平面視において、前記開口部の角部の周囲に、前記角部を構成する前記開口部の2つの辺に沿ってL字形に連続して形成されること、を特徴とする配線基板の製造方法。
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