JP7394495B2 - 配線設計方法、配線構造、およびフリップチップ - Google Patents
配線設計方法、配線構造、およびフリップチップ Download PDFInfo
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Description
パッケージ基板は、配線幅と配線間隔のどちらについても一定の要件を有する。たとえば、配線幅および配線ピッチはどちらも20μm以上である。配線幅および配線ピッチ仕様の一例が以下の表1に列挙される。記号A、B、C、D、E、およびFによって表される項目について図1が参照され得、Aはパッド間隔であり、Bはパッドから隣接する配線の端までの距離であり、Cはパッド幅であり、Dはパッド長であり、Eは配線幅であり、Fは配線間隔である。
様々な動作が、特定の順序で図示され、上記で説明されたが、こうした動作が図示され、説明された特定の順序または順次的な順序で実行されなければならないことを必要とすると理解すべきではなく、所望の結果を得るために、図示され、説明されたすべての動作を実行しなければならないと理解すべきでもないことを理解されたい。たとえば、図2では、バンプパッドの向きが調節された(ステップ204)後に、非信号パッドにバイアホールが設けられ得る(ステップ203)。図10では、第1、第3、および第5の行の信号パッド上の配線を実施するステップ1008が、第7の行の信号パッド上の配線を実施するステップ1009と同時に実行され、またはステップ1009の後に実行され得る。より一般には、ステップ1008および1009が、図2に示されるステップ205などの1つのステップとして組み合わされ得る。
Claims (19)
- フリップチップ内のパッケージ基板についての配線構造であって、前記フリップチップが、前記パッケージ基板と、前記パッケージ基板に対向するフリップチップダイとを備え、前記配線構造が、
前記パッケージ基板上に行および列の配列に配置されたバンプパッドであって、前記バンプパッドが前記フリップチップダイ上の導電性バンプとボンディングされるように構成され、前記バンプパッドが信号パッドおよび非信号パッドを備え、前記非信号パッドが電力パッドおよびグランドパッドを備える、バンプパッドであって、前記信号パッドおよび前記非信号パッドは前記バンプパッドが配置されるエリアの全体にわたって配置され、奇数行のバンプパッドと偶数行のバンプパッドとが、前記配列の列方向に互い違いとなる、バンプパッドと、
電力バイアホールおよびグランドバイアホールを備えるバイアホールであって、前記電力バイアホールが、前記パッケージ基板内の電力層に前記電力パッドを電気的に接続するように構成され、前記グランドバイアホールが、前記パッケージ基板内のグランド層に前記グランドパッドを電気的に接続するように構成される、バイアホールと、
前記パッケージ基板上の前記フリップチップダイの正射影領域から前記信号パッドのサブセットをリードアウトするように構成された配線の層であって、前記信号パッドの前記サブセットが、前記バンプパッドの前記配列についての前記フリップチップダイの設計仕様で必要とされるすべての機能信号を搬送するように構成される、配線の層と、
を備える配線構造。 - 各奇数行で、信号パッドの数が非信号パッドの数よりも多く、
各偶数行で、信号パッドの数が非信号パッドの数よりも少ない、
請求項1に記載の配線構造。 - nが0<n<Nである整数、Nが配列の行の総数として、前記配列の最初のn行では、信号パッドの数が非信号パッドの数よりも多い、請求項1に記載の配線構造。
- 前記電力バイアホールが共通電力バイアホールを備え、前記共通電力バイアホールが、相異なる行の複数の電力パッドを前記電力層に電気的に接続し、
前記グランドバイアホールが共通グランドバイアホールを備え、前記共通グランドバイアホールが、相異なる行の複数のグランドパッドを前記グランド層に電気的に接続する、
請求項1~3のいずれか一項に記載の配線構造。 - 前記共通電力バイアホールが、前記配列の列方向に前記複数の電力パッドと位置合わせされる、請求項4に記載の配線構造。
- 前記複数の電力パッドの縦方向が前記列方向に平行であり、前記縦方向が、各電力パッドが前記電力パッドについての最大サイズを有する方向であり、
前記共通電力バイアホールと前記複数の電力パッドのうちの1つの前記縦方向の一端との間の距離がしきい距離未満である、
請求項5に記載の配線構造。 - 前記共通グランドバイアホールが、前記配列の列方向に前記複数のグランドパッドと位置合わせされる、請求項4~6のいずれか一項に記載の配線構造。
- 前記複数のグランドパッドの縦方向が列方向に平行であり、前記縦方向が、各グランドパッドが前記グランドパッドについての最大サイズを有する方向であり、
前記共通グランドバイアホールと前記複数のグランドパッドのうちの1つの前記縦方向の一端との間の距離がしきい距離未満である、
請求項7に記載の配線構造。 - 前記バンプパッドの前記配列と前記正射影領域の交差する第1および第2の端との間に追加のパッドが設けられず、前記バンプパッドの前記配列と、前記正射影領域の、前記第1および第2の端以外の他の端との間に追加のパッドが設けられ、
配線の前記層が、配線幅および配線ピッチ仕様を満たし、
前記バンプパッドの前記配列と前記正射影領域の他の端との間のギャップを用いて、前記正射影領域から前記信号パッドの前記サブセット内の第1のグループの信号パッドをリードアウトする第1のグループの配線であって、前記第1の端から最も離れている前記配列内の行に位置する信号パッドの少なくとも一部が前記第1のグループの信号パッドに属する、第1のグループの配線と、
前記バンプパッドの前記配列と前記第1および第2の端との間のギャップを用いて、前記正射影領域から、前記信号パッドの前記サブセット内の、前記第1のグループの信号パッド以外の残りの信号パッドをリードアウトする第2のグループの配線と、
を備える、請求項1~8のいずれか一項に記載の配線構造。 - 前記バンプパッドの前記配列と前記正射影領域の第1の端だけの間に追加のパッドが設けられず、前記バンプパッドの前記配列と、前記正射影領域の、前記第1の端以外の他の端との間に追加のパッドが設けられ、
配線の前記層が、配線幅および配線ピッチ仕様を満たし、
前記バンプパッドの前記配列と前記正射影領域の他の端との間のギャップを用いて、前記正射影領域から前記信号パッドの前記サブセット内の第1のグループの信号パッドをリードアウトする第1のグループの配線であって、前記第1の端から最も離れている前記配列内の行に位置する信号パッドの少なくとも一部が前記第1のグループの信号パッドに属する、第1のグループの配線と、
前記バンプパッドの前記配列と前記正射影領域の前記第1の端との間のギャップを用いて、前記正射影領域から、前記信号パッドの前記サブセット内の、前記第1のグループの信号パッド以外の残りの信号パッドをリードアウトする第2のグループの配線と、
を備える、請求項1~8のいずれか一項に記載の配線構造。 - 前記配列の端でない行および同一の列に位置する信号パッドの一部が、同一の縦方向を有し、前記縦方向が、各信号パッドが前記信号パッドについての最大サイズを有する方向であり、
前記配列の前記端でない行および同一の列に位置する信号パッドの前記一部について、配線幅および配線ピッチ仕様を満たすことに基づいて、
第1の信号パッドが、前記第1の信号パッドの縦方向の軸の第1の側からリードアウトされ、
前記第1の信号パッドと同一の列に位置し、前記第1の信号パッドに直に対向する第2の信号パッドが、前記軸の第2の側からリードアウトされ、前記第2の側が、前記軸に関して前記第1の側と反対側にある、
請求項1~8のいずれか一項に記載の配線構造。 - 前記配線幅および配線ピッチ仕様が、多くても2つの配線が2つのバンプパッドごとの間を通過することを可能にする、請求項9~11のいずれか一項に記載の配線構造。
- 相異なる行の複数の電力パッドが、前記配列の列方向に互いに直に対向し、相異なる行の複数のグランドパッドが、前記列方向に互いに直に対向する、請求項1~12のいずれか一項に記載の配線構造。
- 前記バンプパッドの前記配列と前記正射影領域の少なくとも第1の端との間に追加のパッドが設けられず、
前記バンプパッドの第1のサブセットが、前記第1の端に垂直な第1の縦方向を有し、
前記バンプパッドの第2のサブセットが、前記第1の縦方向とは異なる縦方向を有する、
請求項1~8のいずれか一項に記載の配線構造。 - 前記バンプパッドの前記配列と前記正射影領域の交差する第1および第2の端との間に追加のパッドが設けられず、
前記バンプパッドの前記第2のサブセットが、
前記配列内のバンプパッドの少なくとも1つの行のバンプパッドの一部であって、全体としてのバンプパッドの前記少なくとも1つの行が、前記配列内の他の行よりも前記第1の端から離れている、バンプパッドの一部と、
前記配列内のバンプパッドの少なくとも1つの列のバンプパッドの一部であって、全体としてのバンプパッドの前記少なくとも1つの列が、前記配列内の他の列よりも前記第2の端に近い、バンプパッドの一部と、
を備え、
前記バンプパッドの前記第1のサブセットが、前記バンプパッドの前記配列内の、前記第2のサブセット内以外のバンプパッドを備える、
請求項14に記載の配線構造。 - 前記バンプパッドのそれぞれについて、前記パッケージ基板上の前記バンプパッドの正射影が、丸みのある長方形形状を有する、請求項1~15のいずれか一項に記載の配線構造。
- 配線幅および配線ピッチ仕様を満たすことに基づいて、各バンプパッドの長さが前記バンプパッドの幅の3倍より大きい、請求項16に記載の配線構造。
- フリップチップダイと、
前記フリップチップダイに対向するパッケージ基板と、
請求項1~17のいずれか一項に記載の配線構造と、
を備えるフリップチップ。 - フリップチップ内のパッケージ基板についての配線設計方法であって、前記フリップチップが、前記パッケージ基板と、前記パッケージ基板に対向するフリップチップダイとを備え、
バンプパッドを行および列の配列に配置するステップであって、前記バンプパッドが前記フリップチップダイ上の導電性バンプとボンディングされるように構成され、前記バンプパッドが信号パッドおよび非信号パッドを備え、前記非信号パッドが電力パッドおよびグランドパッドを備え、前記信号パッドおよび前記非信号パッドは前記バンプパッドが配置されるエリアの全体にわたって配置され、奇数行のバンプパッドと偶数行のバンプパッドとが、前記配列の列方向に互い違いとなる、バンプパッドを行および列の配列に配置するステップと、
前記非信号パッドにバイアホールを設け、前記パッケージ基板内の電力層に前記電力パッドを電気的に接続し、前記パッケージ基板内のグランド層に前記グランドパッドを電気的に接続するステップと、
配線の層を使用して、前記パッケージ基板上の前記フリップチップダイの正射影領域から前記信号パッドのサブセットをリードアウトするステップであって、前記信号パッドの前記サブセットが、前記バンプパッドの前記配列についての前記フリップチップダイの設計仕様で必要とされるすべての機能信号を搬送するように構成される、リードアウトするステップと、
を含む配線設計方法。
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