JP6697870B2 - 配線基板及びその製造方法 - Google Patents
配線基板及びその製造方法 Download PDFInfo
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- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
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- H05K2203/07—Treatments involving liquids, e.g. plating, rinsing
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Description
[第1の実施の形態に係る配線基板の構造]
まず、第1の実施の形態に係る配線基板の構造について説明する。図1は、第1の実施の形態に係る配線基板を例示する断面図である。図1を参照するに、配線基板1は、絶縁層10と、接着層21及び22と、配線層31及び32と、貫通配線40と、ソルダーレジスト層51及び52と、金属層61及び62とを有する。
次に、第1の実施の形態に係る配線基板の製造方法について説明する。図3〜図6は、第1の実施の形態に係る配線基板の製造工程を例示する図である。なお、第1の実施の形態に係る配線基板の製造工程の説明で用いる断面図は、全て図1に対応する断面図である。
第1の実施の形態の変形例1では、突出部の一方の面を露出させない例を示す。なお、第1の実施の形態の変形例1において、既に説明した実施の形態と同一構成部についての説明は省略する場合がある。
第2の実施の形態では、複数の電子部品を縦横に搭載可能な配線基板の例を示す。なお、第2の実施の形態において、既に説明した実施の形態と同一構成部についての説明は省略する場合がある。
配線基板2は、1つの電子部品が搭載される電子部品搭載領域Bを複数個(図9の例では25個)有している。複数の電子部品搭載領域Bは、例えば、絶縁層10上に格子状(グリッド状)に配置することができる。夫々の電子部品搭載領域Bには、配線層31と、電子部品搭載用のパッドを備えた配線層32と、貫通配線40が設けられている。
1x 貫通孔
10 絶縁層
21、22 接着層
31、32 配線層
31g、32d、32g 外部端子
32a、32b パッド
32c 配線パターン
40 貫通配線
40T 突出部
51、52 ソルダーレジスト層
51x、52x、91x 開口部
61、62 金属層
81、82 保護フィルム
91、92 マスキング材
100、100A 半導体装置
110 バンプ
111 銅コアボール
112 はんだ
120、140 電子部品
130 接合層
Claims (12)
- 絶縁層と、
前記絶縁層の一方の面側に設けられた第1配線層と、
前記絶縁層の他方の面側に設けられた第2配線層と、
前記第1配線層及び前記絶縁層を貫通し、前記第2配線層と電気的に接続された貫通配線と、を有し、
前記貫通配線の側壁は、前記絶縁層と接し、
前記貫通配線の前記第1配線層側の端部は、前記第1配線層の一方の面から突出して突出部を形成し、
前記突出部の一方の面は、最外周が最も浅く、最外周側よりも中央側の深さが深い凹面である配線基板。 - 前記貫通配線は単一層構成である請求項1に記載の配線基板。
- 前記貫通配線は、前記第1配線層及び前記絶縁層を貫通する貫通孔を充填し、
前記突出部は、前記貫通孔の外周側に位置する前記第1配線層の一方の面に延在している請求項1又は2に記載の配線基板。 - 前記第1配線層の一方の面を被覆するソルダーレジスト層が設けられ、
前記ソルダーレジスト層は、前記第1配線層の一方の面、及び前記突出部の一方の面を露出する開口部を備え、
前記開口部内に露出する前記第1配線層及び前記突出部は、外部接続用のパッドを構成している請求項1乃至3の何れか一項に記載の配線基板。 - 前記第1配線層の一方の面を被覆するソルダーレジスト層が設けられ、
前記ソルダーレジスト層は、前記第1配線層の一方の面を露出する開口部を備え、
前記突出部の一方の面は前記ソルダーレジスト層に被覆され、
前記開口部内に露出する前記第1配線層は、外部接続用のパッドを構成している請求項1乃至3の何れか一項に記載の配線基板。 - 前記第1配線層の前記貫通配線の側壁と接する部分の前記絶縁層側の角部は、前記第1配線層の他方の面から前記絶縁層側に突出している請求項1乃至5の何れか一項に記載の配線基板。
- 前記第1配線層の前記貫通配線の側壁と接する部分の前記突出部側の角部は、丸みを帯びている請求項1乃至6の何れか一項に記載の配線基板。
- 前記第2配線層は、外部接続用のパッドを備え、
前記貫通配線の前記第2配線層側の端部は、前記パッドに直接接合されている請求項1乃至7の何れか一項に記載の配線基板。 - 前記絶縁層上に複数の電子部品搭載領域が格子状に配置され、
夫々の前記電子部品搭載領域に、前記第1配線層と、電子部品搭載用のパッドを備えた前記第2配線層と、前記貫通配線が設けられている請求項1乃至8の何れか一項に記載の配線基板。 - 絶縁層と、前記絶縁層の一方の面側に設けられた第1配線層と、を備えた基材に、打ち抜き加工により前記絶縁層及び前記第1配線層を貫通する貫通孔を形成する工程と、
前記絶縁層の他方の面側に前記貫通孔を被覆して金属層を設け、前記金属層をパターニングして第2配線層を形成する工程と、
前記第1配線層の一方の面に、前記貫通孔を露出する開口部を備えたマスキング材を形成する工程と、
前記第2配線層を給電層とする電解めっき法により、前記開口部内に露出する前記貫通孔を充填すると共に、前記第1配線層側の端部が前記第1配線層の一方の面から前記開口部内に突出する貫通配線を形成する工程と、
前記マスキング材を除去する工程と、を有し、
前記貫通配線を形成する工程において、前記端部の一方の面は、外周側よりも中央側の深さが深い凹面となる配線基板の製造方法。 - 前記貫通配線を形成する工程において、前記端部は、前記貫通孔の外周側に位置する前記第1配線層の一方の面に延在する請求項10に記載の配線基板の製造方法。
- 前記貫通孔を形成する工程において、前記第1配線層の一方の面側から前記打ち抜き加工を行うことにより前記貫通孔を形成し、
前記打ち抜き加工により、前記第1配線層の前記貫通孔の側壁を構成する部分が前記絶縁層側に突出する請求項10又は11に記載の配線基板の製造方法。
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