JP4602350B2 - ランド・グリッド・アレイ実装デバイスおよびその形成方法 - Google Patents
ランド・グリッド・アレイ実装デバイスおよびその形成方法 Download PDFInfo
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- JP4602350B2 JP4602350B2 JP2006543819A JP2006543819A JP4602350B2 JP 4602350 B2 JP4602350 B2 JP 4602350B2 JP 2006543819 A JP2006543819 A JP 2006543819A JP 2006543819 A JP2006543819 A JP 2006543819A JP 4602350 B2 JP4602350 B2 JP 4602350B2
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Description
治具内で複数の柔らかい導電性ボールを形成するステップであって、ボールの対向面の少なくとも一部が平らになるステップと、
形成したボールを治具からモールド・マスキング・テープに移動するステップと、
集積回路ダイの第1の面をモールド・マスキング・テープに取り付けるステップであって、ダイの第2の面が複数のダイ・ボンディング・パッドを有し、ダイが形成されたボールにより囲まれているステップと、
ダイ・ボンディング・パッドを、ダイを囲んでいる形成された各ボールに電気的に接続するステップと、
ダイ、電気接続、および形成したボールの頂部をモールド・コンパウンドで封入するス
テップと、
ボールの底部が露出するようにモールド・マスキング・テープを除去するステップとを含む。この場合、2つ以上のデバイスが同時に形成され、次に隣接するデバイスを分離するために個別分割ステップが行われる。
よび底面を有する。この好ましい実施形態の場合には、ダイ12の底面は、ダイ取付け接着剤16によりボール14に直接取り付けられる(図1)。ダイ12は、ダイ12が複数のボール14で囲まれるような位置に取り付けられる。I/Oの数は、各ダイ12を囲んでいるボール14の数を決定するために使用される。ダイ12を複数のボール14の頂部に取り付けることにより、大きさが同じで1つのボール・マトリックス・パターンを有するボールを形成するために、治具を使用することができる。1つのボール・マトリックス・パターンにより、治具30のサイズを変えなくても、異なるサイズのダイおよび異なるパッケージ・サイズを形成することができる。さらに、すでに説明したように、ダイ12が取り付けられているボール14は、IC12のための熱路としての働きをし、プリント回路板レベルの半田接合部の強度を強化する半田づけすることができる表面を提供する。すなわち、ボール14は、半田づけすることができる面を提供する。
ール14のアレイの底部が露出する。信頼性の高いLGA相互接続を確実に行うために、ボールの露出した底部を、両方とも腐蝕に強く、接触抵抗が低い貴金属による面仕上げ(例えば、ニッケル/金)でコーティングまたはメッキすることができる。ボール14の露出した部分は、電解ニッケル/金メッキを選択的に堆積することによりコーティングすることができる。最後に、好適には、個々のパッケージ化されたデバイス10を形成するために周知のソー分割工程により、封入したマトリックスが個々に分割される。
Claims (9)
- 集積回路ダイを実装するための方法であって、
治具内で複数の柔らかい導電性ボールを形成するステップであって、前記ボールの対向面の少なくとも一部が平らになるステップと、
前記形成したボールを前記治具からモールド・マスキング・テープに移動するステップと、
集積回路ダイの第1の面を前記モールド・マスキング・テープに取り付けるステップであって、前記ダイの第2の面が複数のダイ・ボンディング・パッドを有し、前記ダイが前記形成されたボールにより囲まれているステップと、
前記ダイ・ボンディング・パッドを、前記ダイを囲んでいる前記形成された各ボールに電気的に接続するステップと、
前記ダイ、前記電気接続および前記形成したボールの頂部をモールド・コンパウンドで封入するステップと、
前記ボールの底部が露出するように前記モールド・マスキング・テープを除去するステップとを含む方法。 - 前記治具内で形成された前記ボールが球状である請求項1に記載の集積回路ダイを実装するための方法。
- 前記治具内で形成された前記ボールがほぼ矩形である請求項1に記載の集積回路ダイを実装するための方法。
- ボールを形成するステップが、前記ボールの少なくとも2つの対向面の少なくとも一部を平らにする機械的コイニング・ステップを含む請求項1に記載の集積回路を実装するための方法。
- 前記モールド・マスキング・テープをフレームに取り付けるステップをさらに含む請求項1に記載の集積回路ダイを実装するための方法。
- 前記ダイ取付けステップが、前記ダイの前記第1の面をダイ取付け接着剤により複数のボールに取り付けるステップを含む請求項1に記載の集積回路ダイを実装するための方法。
- 前記電気的に接続するステップが、対応する複数のワイヤにより、前記ダイ・ボンディング・パッドを前記各ボールにワイヤボンディングするステップを含む請求項1に記載の集積回路ダイを実装するための方法。
- 前記ワイヤボンディング・ステップにおいて、前記ワイヤが前記ボールを貫通し、その中に埋め込まれる請求項7に記載の集積回路ダイを実装するための方法。
- 隣接する複数の封入されたダイから封入されたダイをソーで分割するステップをさらに含む請求項1に記載の集積回路ダイを実装するための方法。
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US10/731,831 US7056766B2 (en) | 2003-12-09 | 2003-12-09 | Method of forming land grid array packaged device |
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KR20060126645A (ko) | 2006-12-08 |
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US7056766B2 (en) | 2006-06-06 |
WO2005060450A2 (en) | 2005-07-07 |
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