JP2013508954A - 半導体ダイにおける応力を軽減するためのルーティング層 - Google Patents
半導体ダイにおける応力を軽減するためのルーティング層 Download PDFInfo
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- JP2013508954A JP2013508954A JP2012534507A JP2012534507A JP2013508954A JP 2013508954 A JP2013508954 A JP 2013508954A JP 2012534507 A JP2012534507 A JP 2012534507A JP 2012534507 A JP2012534507 A JP 2012534507A JP 2013508954 A JP2013508954 A JP 2013508954A
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- bump
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- conductive traces
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- semiconductor die
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Abstract
半導体ダイのためのルーティング層が開示される。ルーティング層は、半田バンプを取り付けるためのパッドと、集積回路を有するダイのバンプパッドにボンディングされるボンドパッドと、ボンドパッドをパッドと相互接続するトレースと、を含む。ルーティング層は誘電体材質の層上に形成される。ルーティング層は、パッドに取り付けられる半田バンプからの応力を吸収するように、幾つかのパッドを少なくとも部分的に包囲する伝導性トレースを含む。パッドを包囲するトレースの一部は、半田バンプに隣接する下層の誘電体材質の一部を応力から保護する。
【選択図】図5
Description
Claims (23)
- i) 半導体ウエハの一片の1つの表面上に形成される集積回路と、
ii) 前記集積回路と相互接続される複数の入力・出力(I/O)パッドと、
iii) 前記1つの表面上に形成される誘電体層と前記誘電体層上に形成される複数の伝導性トレースとを備え前記伝導性トレースの各々は前記I/Oパッドの1つと前記誘電体層上に形成される複数のバンプパッドの1つとの間で延在するルーティング層と、
iv) 複数の半田バンプの各1つを取り付けるための上面と前記上面よりも小さく前記複数のバンプパッドの各1つと物理的に接触する底部コンタクト表面とを各々が有する複数のアンダーバンプメタライゼーション(UBM)と、を備え、
前記伝導性トレースの少なくとも幾つかは前記UBMの前記上面の下方で前記バンプパッドに接触することなしに前記バンプパッドに隣接して通過して前記UBMに隣接する前記ルーティング層を機械的に補強する半導体ダイ。 - 前記ルーティング層は伝導性トレースの複数の層を備え、前記伝導性トレースの複数の層の各々は少なくとも1つの誘電体層によって前記伝導性トレースの複数の層の別の1つから隔てられている請求項1の半導体ダイ。
- 前記伝導性トレースの前記少なくとも幾つかは前記半導体ダイの熱膨張係数と前記半田バンプが取り付けられる基板の熱膨張係数の不整合に起因する対応する前記半田バンプからの応力を吸収する請求項1の半導体ダイ。
- 前記伝導性トレースの前記少なくとも幾つかは電力トレース、グランドトレース、及び信号トレースの1つを備える請求項1の半導体ダイ。
- 対応するUBMの上面の平均半径RUBM以上の半径Rareaの円形領域として定義される、バンプパッドを含む円形外接区域は、前記含まれるバンプパッドを除くその区域の30%乃至100%を前記伝導性トレースの一部で覆われている請求項1の半導体ダイ。
- 前記バンプパッドの各1つ内で内接する円の直径は約50μmである請求項1の半導体ダイ。
- 前記UBMの各々の上面内で内接する円の直径は約80μmであり、前記UBMの前記各々の底部コンタクト表面内で内接する円の直径は約46μmである請求項6の半導体ダイ。
- 前記伝導性トレースの各々の幅は約12μmである請求項7の半導体ダイ。
- 前記ダイはフリップチップ取り付けを用いて前記基板に取り付けられる請求項1の半導体ダイ。
- 前記パッケージはDRAM、SRAM、EEPROM、フラッシュメモリ、グラフィクスプロセッサ、汎用プロセッサ、及びDSPの1つである請求項1の半導体ダイ。
- 半導体ダイであって、
i) 1つの表面上に形成される少なくとも1つの集積回路及び前記少なくとも1つの集積回路に接続される複数の入力・出力(I/O)パッドと、
ii) 前記ダイの前記表面上に形成される誘電体層と前記誘電体層上に形成される複数の伝導性トレースとを備え前記伝導性トレースの各々は前記I/Oパッドの1つと前記誘電体層上に形成される複数のバンプパッドの1つとの間で延在するルーティング層と、
iii) 前記集積回路を基板と電気的に相互接続するために前記バンプパッド上に形成される複数の半田バンプと、を備え、
前記バンプパッドの少なくとも1つは各前記バンプパッド上に形成される対応するアンダーバンプメタライゼーション(UBM)の上面の平均半径以上の半径を有する円形外接区域内に含まれ、前記伝導性トレースの少なくとも幾つかは、含まれるバンプパッドに接触することなしに前記円形外接区域を通過して前記含まれるバンプパッドに隣接する前記ルーティング層を機械的に補強する半導体ダイ。 - 円形外接区域内に含まれる前記少なくとも1つのバンプパッドは形状において六角形、八角形、及び多角形の1つである請求項11の半導体ダイ。
- 前記UBM上に形成される半田バンプを更に備える請求項11の半導体ダイ。
- 前記半田バンプの1つは前記UBMの前記上面に取り付けられ、前記上面よりも小さい前記UBMの底部コンタクト表面は前記少なくとも1つのバンプパッドと物理的に通じている請求項13の半導体ダイ。
- 半導体ダイのためのルーティング層であって、
i) アンダーバンプメタライゼーション(UBM)を用いて半田バンプを取り付けるための複数のバンプパッドと、
ii) 前記バンプパッド、及びダイ上に形成される集積回路の複数の入力・出力(I/O)パッドの対応する1つずつを相互接続する複数の伝導性トレースと、を備え、
前記伝導性トレースの少なくとも1つは前記バンプパッドの1つに隣接して通過して前記UBMの対応する1つに隣接する前記ルーティング層を機械的に補強するルーティング層。 - 前記バンプパッドの各々は形状において多角形、円、及び長方形の1つである請求項15のルーティング層。
- 前記複数の伝導性トレースの各々は、銅、アルミニウム、金、鉛、錫、銀、ビスマス、アンチモン、亜鉛、ニッケル、ジルコニウム、マグネシウム、インジウム、テルル、及びガリウムの少なくとも1つを備える請求項15のルーティング層。
- 誘電体層を更に備え、前記複数の伝導性トレースは前記誘電体層上に形成される請求項15のルーティング層。
- 請求項15のルーティング層を備える半導体ダイ。
- 複数の入力・出力(I/O)パッドと相互接続される集積回路(IC)を有するダイのための半導体ダイを製造する方法であって、
i) 対応する複数のバンプパッドと前記I/Oパッドとを相互接続する複数の伝導性トレースであって少なくともその1つは前記バンプパッドの1つに隣接する誘電体層を補強するように前記バンプパッドの前記1つに隣接して通過する複数の伝導性トレースを前記誘電体層上に形成することと、
ii) 複数の半田バンプを対応する前記バンプパッドに取り付けることと、を備える方法。 - 前記複数の半田バンプを取り付けることは、前記バンプパッドの各々上にアンダーバンプメタライゼーション(UBM)を形成することと、前記半田バンプの各1つを前記UBMの対応する1つの上に実装することと、を備える請求項20の方法。
- ルーティング層上にパッシべーション層を形成することを更に備える請求項21の方法。
- 前記バンプパッドを露出させて前記UBMを形成するために前記パッシべーション層内に開口を形成することを更に備える請求項22の方法。
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US12/604,584 US8227926B2 (en) | 2009-10-23 | 2009-10-23 | Routing layer for mitigating stress in a semiconductor die |
US12/604,584 | 2009-10-23 | ||
PCT/CA2010/001670 WO2011047479A1 (en) | 2009-10-23 | 2010-10-21 | A routing layer for mitigating stress in a semiconductor die |
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