JP4126038B2 - Bgaパッケージ基板及びその製作方法 - Google Patents
Bgaパッケージ基板及びその製作方法 Download PDFInfo
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Description
本発明によるBGAパッケージ基板の製作方法の前記(D−2)過程において、前記ソルダボールパッドパターンを部分エッチングする過程は、プラズマエッチング方式などの乾式方式により前記ソルダボールパッドパターンを部分エッチングすることが好ましい。
図3a〜図3oは本発明の一実施例によるBGAパッケージ基板の製作方法の流れを示す断面図、図4は図3a〜図3oに示す方法で製作されたBGAパッケージ基板に半導体チップを実装したCSP製品の断面図である。
前述したソルダボールパッドを形成する銅箔層140′及び銅鍍金層150′の総厚さは、電気的特性、後続段階で形成されるソルダボールの大きさなどによって決定される。
次いで、接着剤400で半導体チップ500を実装し、ワイヤーボンディング180及びソルダボール190を形成すると、図4に示すようなCSP製品が製作される。
110 銅張積層板の絶縁樹脂層、
120、120′ 銅張積層板の銅箔層、
130、130′ 絶縁層、
140、140′ 銅箔層、
150、150′ 銅鍍金層、
160、160′ ソルダレジスト、
170、170′ 金鍍金層、
180 ワイヤーボンディング、
190 ソルダボール、
200a、200a′、200b、200b′ ドライフィルム、
300、300′ アートワークフィルム、
310、310′ アートワークフィルムの印刷されていない部分、
320、320′ アートワークフィルムの印刷された黒い部分、
400 接着剤、
500 半導体チップ。
Claims (14)
- 回路パターン及びワイヤーボンディングパターンを含むパターンが形成された第1外層と、
回路パターン及びソルダボールパッドパターンを含むパターンが形成された第2外層と、
前記第1外層と前記第2外層との間に形成された絶縁層と、
前記第1外層と前記第2外層とを電気的に接続する第1外部ビアホールと、
前記第1外層と前記第2外層上にそれぞれ形成され、前記ワイヤーボンディングパッドパターン及び前記ソルダボールパッドパターンに対応する部分が開放されているソルダレジスト層とを含んでなり、
前記ソルダボールパッドパターンの厚さが前記第2外層の回路パターンの厚さより小さいことを特徴とするBGAパッケージ基板。 - 回路パターンが形成された多数の回路層、前記多数の回路層間にそれぞれ形成される多数の絶縁樹脂層、及び前記回路層間を電気的に接続する内部ビアホールを含み、前記絶縁層の内部に形成される内層と、
前記外層の回路層と前記内層の回路層とを電気的に接続する第2外部ビアホールとをさらに含むことを特徴とする請求項1に記載のBGAパッケージ基板。 - 前記ワイヤーボンディングパッドパターン及び前記ソルダボールパッド上に形成される金鍍金層をさらに含むことを特徴とする請求項1に記載のBGAパッケージ基板。
- 前記ワイヤーボンディングパッドパターンと前記金鍍金層間、及び前記ソルダボールパッドパターンと前記金鍍金層間に形成されるニッケル鍍金層をさらに含むことを特徴とする請求項3に記載のBGAパッケージ基板。
- 前記ソルダボールパッドパターンの金鍍金層上に形成されるソルダボールをさらに含むことを特徴とする請求項3に記載のBGAパッケージ基板。
- 前記第1外層及び前記第2外層はCuを含む物質からなることを特徴とする請求項1に記載のBGAパッケージ基板。
- (A)第1外層、第2外層、及び前記第1外層と前記第2外層との間に形成される絶縁層を含む原板を用意する段階と、
(B)前記第1外層に、回路パターン及びワイヤーボンディングパッドパターンを含むパターンを形成し、前記第2外層に、回路パターン及びソルダボールパッドパターンを含むパターンを形成する段階と、
(C)前記第1外層及び前記第2外層にソルダレジストを塗布した後、前記ワイヤーボンディングパッドパターン及び前記ソルダボールパッドパターンに対応する部分が開放されているソルダレジストパターンを形成する段階と、
(D)前記第2外層のソルダボールパッドパターンを厚さ方向で部分エッチングして前記第2外層の回路パターンより低い厚さを有するように形成する段階とを含むことを特徴とするBGAパッケージ基板の製作方法。 - 前記(A)段階の後、
(E)前記原板に第1外部ビアホールを形成する段階と、
(F)前記原板の外層及び前記第1外部ビアホールの側壁に銅鍍金層を形成する段階とをさらに含むことを特徴とする請求項7に記載のBGAパッケージ基板の製作方法。 - 前記(D)段階の後、
(E)前記ワイヤーボンディングパッドパターン及び前記ソルダボールパッドパターン上にニッケル鍍金層を形成する段階と、
(F)前記ワイヤーボンディングパッドパターン及び前記ソルダボールパッドパターンのニッケル鍍金層上に金鍍金層を形成する段階と、
(G)前記ソルダボールパッドパターンの金鍍金層上にソルダボールを形成する段階とをさらに含むことを特徴とする請求項7に記載のBGAパッケージ基板の製作方法。 - 前記(D)段階は、
(D−1)前記第2外層のソルダレジスト上にエッチングレジストを塗布した後、前記エッチングレジストを露光及び現像することで、前記ソルダボールパッドパターンに対応する部分が開放されているエッチングレジストパターンを形成する過程と、
(D−2)前記エッチングレジストパターンにより、前記ソルダボールパッドパターンを部分エッチングする過程と、
(D−3)前記エッチングレジストを除去する過程とを含むことを特徴とする請求項7に記載のBGAパッケージ基板の製作方法。 - 前記(D−2)過程において、前記ソルダボールパッドパターンを部分エッチングする過程は、エッチング液噴霧方式などの湿式方式により前記ソルダボールパッドパターンを部分エッチングすることを特徴とする請求項10に記載のBGAパッケージ基板の製作方法。
- 前記(D−2)過程において、前記ソルダボールパッドパターンを部分エッチングする過程は、プラズマエッチング方式などの乾式方式により前記ソルダボールパッドパターンを部分エッチングすることを特徴とする請求項10に記載のBGAパッケージ基板の製作方法。
- 前記エッチングレジストは感光性物質からなることを特徴とする請求項10に記載のBGAパッケージ基板の製作方法。
- 前記原板は、
回路パターンが形成された多数の回路層、前記多数の回路層間にそれぞれ形成される多数の絶縁樹脂層、及び前記回路層間を電気的に接続する内部ビアホールを含み、前記絶縁層の内部に形成される内層と、
前記外層の回路層と前記内層の回路層とを電気的に接続する第2外部ビアホールとをさらに含むことを特徴とする請求項7に記載のBGAパッケージ基板の製作方法。
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| KR1020040058313A KR100557540B1 (ko) | 2004-07-26 | 2004-07-26 | Bga 패키지 기판 및 그 제작 방법 |
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| JP2006041459A (ja) | 2006-02-09 |
| US7408261B2 (en) | 2008-08-05 |
| KR20060009649A (ko) | 2006-02-01 |
| US20080216314A1 (en) | 2008-09-11 |
| KR100557540B1 (ko) | 2006-03-03 |
| US7802361B2 (en) | 2010-09-28 |
| US20060017151A1 (en) | 2006-01-26 |
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