JP2010525558A - 電気的相互接続構造体及びその形成方法 - Google Patents
電気的相互接続構造体及びその形成方法 Download PDFInfo
- Publication number
- JP2010525558A JP2010525558A JP2010502479A JP2010502479A JP2010525558A JP 2010525558 A JP2010525558 A JP 2010525558A JP 2010502479 A JP2010502479 A JP 2010502479A JP 2010502479 A JP2010502479 A JP 2010502479A JP 2010525558 A JP2010525558 A JP 2010525558A
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- Prior art keywords
- solder
- metal core
- solderless
- conductive pad
- core structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Abstract
【解決手段】 電気的構造体は、第1の導電性パッドを含む第1の基板と、第2の導電性パッドを含む第2の基板と、第1の導電性パッドを第2の導電性パッドに電気的かつ機械的に接続する相互接続構造体とを含む。相互接続構造体は、無はんだ金属コア構造体と、第1のはんだ構造体と、第2のはんだ構造体とを含む。第1のはんだ構造体は、無はんだ金属コア構造体の第1の部分を第1の導電性パッドに電気的かつ機械的に接続する。第2のはんだ構造体は、無はんだ金属コア構造体の第2の部分を第2の導電性パッドに電気的かつ機械的に接続する。
【選択図】 図1
Description
1.保護フォトレジスト層を塗布し、パターン形成するステップと、
2.化学溶液を用いて、銅の非保護領域をエッチング又は溶解するステップと、
3.保護フォトレジスト層を剥離するステップと
を含む。
2a、2b、2c、2d、2e、2f、2g,2h:電気的構造体
5a、5b、5c、5d、29:相互接続構造体
6a、6b、6c、6d、6e:はんだ構造体
9a:第1のはんだ部分(はんだ構造体)
9b:第2のはんだ部分(はんだ構造体)
10、12:導電性パッド
14:無はんだ金属コア構造体(無はんだ金属相互接続構造体)
14a:無はんだ金属コア構造体14の上面
17、17a、17b:球状無はんだ金属コア構造体
19:付加層
21:絶縁体層35の裏面
23:界面
25a、25b、31、32a、32b、32c:アンダーフィル封止材料層
25c:フィラー
35:絶縁体層
35a、35b、35c、35d、39a、39b、39c:構造体
37:無はんだ金属層
40、40b:ガラス又はシリコン・モールド
43:トランスファー基板
43a:キャビティ
Claims (29)
- 第1の導電性パッドを含む第1の基板と、
第2の導電性パッドを含む第2の基板と、
前記第1の導電性パッドを前記第2の導電性パッドに電気的かつ機械的に接続する相互接続構造体と
を含み、
前記相互接続構造体は、無はんだ金属コア構造体と、前記無はんだ金属コア構造体の第1の部分と直接機械的に接触する第1のはんだ構造体と、前記無はんだ金属コア構造体の第2の部分と直接機械的に接触する第2のはんだ構造体とを含み、
前記第1のはんだ構造体は、前記無はんだ金属コア構造体の前記第1の部分を前記第1の導電性パッドに電気的かつ機械的に接続し、
前記第2のはんだ構造体は、前記無はんだ金属コア構造体の前記第2の部分を前記第2の導電性パッドに電気的かつ機械的に接続する、
電気的構造体。 - 前記無はんだ金属コア構造体は円筒形状を備える、請求項1に記載の電気的構造体。
- 前記無はんだ金属コア構造体は球形状を備える、請求項1に記載の電気的構造体。
- 前記無はんだ金属コア構造体は、銅、ニッケル、及び金からなる群から選択された金属材料を含む、請求項1に記載の電気的構造体。
- 前記無はんだ金属コア構造体は、第1の金属構造体と、該第1の金属構造体の全外表面を覆い、かつそれに直接機械的に接触する第2の金属構造体とを含み、
前記全外表面は、前記第1の金属構造体を完全に取り囲み、
前記第1の金属構造体は第1の金属材料からなり、
前記第2の金属構造体は、前記第1の金属材料とは異なる第2の金属材料からなる、
請求項1に記載の電気的構造体。 - 前記相互接続構造体は第3のはんだ構造体を含み、
前記無はんだ金属コア構造体は、球形状を備える第1の無はんだ金属コアと、前記球形状を備える第2の無はんだ金属コアとを含み、
前記第3のはんだ構造体は、前記第1の無はんだ金属コアを前記第2の無はんだ金属コアに電気的かつ機械的に結合させ、
前記無はんだ金属コア構造体の前記第1の部分は、前記第1の無はんだ金属コア上に配置され、
前記無はんだ金属コア構造体の前記第2の部分は、前記第2の無はんだ金属コア上に配置される、
請求項1に記載の電気的構造体。 - 前記第1のはんだ構造体は第1のはんだ材料を含み、
前記第2のはんだ構造体は第2のはんだ材料を含み、
前記第1のはんだ材料は、前記第2のはんだ材料とは異なる、
請求項6に記載の電気的構造体。 - 前記第3のはんだ構造体は第3のはんだ材料を含み、
前記第3のはんだ材料は、前記第1のはんだ材料及び前記第2のはんだ材料とは異なる、
請求項7に記載の電気的構造体。 - 前記第1の無はんだ金属コアを取り囲み、かつ前記第1の基板と接触するアンダーフィル封止材料の第1の層と、
前記第2の無はんだ金属コアを取り囲み、かつ前記第2の基板と接触するアンダーフィル封止材料の第2の層と
をさらに含み、
前記第1の層は第1の熱膨張係数を備え、
前記第2の層は第2の熱膨張係数を備え、
前記第1の熱膨張係数は、前記第2の熱膨張係数とは異なる、
請求項6に記載の電気的構造体。 - 前記第1の基板は半導体デバイスであり、
前記第2の基板はチップ・キャリアであり、
前記第1の熱膨張係数は、前記第2の熱膨張係数よりも小さい、
請求項9に記載の電気的構造体。 - はんだで構成されるはんだ相互接続構造体をさらに含み、
前記第1の基板は第3の導電性パッドを含み、
前記第2の基板は第4の導電性パッドを含み、
前記はんだ相互接続構造体は、前記第3の導電性パッドを前記第4の導電性パッドに電気的かつ機械的に接続する、
請求項1に記載の電気的構造体。 - 前記第1の無はんだ金属コアを取り囲み、かつ前記第1の基板と前記第2の基板との間の空間を充填する、ウェハ・レベルのアンダーフィル封止材料の第1の層をさらに含む、請求項1に記載の電気的構造体。
- 第1の導電性パッドを含む第1の基板と、
第2の導電性パッドを含む第2の基板と、
前記第1の導電性パッドを前記第2の導電性パッドに電気的かつ機械的に接続する相互接続構造体と
を含み、
前記相互接続構造体は、無はんだ金属コア構造体と、前記無はんだ金属コア構造体の全外表面を覆うはんだ層とを含み、
前記全外表面は、前記第1の金属構造体を完全に取り囲み、
前記はんだ層は、前記無はんだ金属コア構造体の前記全外表面と直接電気的かつ機械的に接触し、
前記はんだ層は、前記無はんだ金属コア構造体を前記第1の導電性パッド及び前記第2の導電性パッドに電気的かつ機械的に接続する、
電気的構造体。 - 前記無はんだ金属コア構造体は円筒形状を備える、請求項13に記載の電気的構造体。
- 前記無はんだ金属コア構造体は球形状を備える、請求項13に記載の電気的構造体。
- 前記無はんだ金属コア構造体は、銅、ニッケル、及び金からなる群から選択された金属材料を含む、請求項13に記載の電気的構造体。
- 前記無はんだ金属コア構造体は、第1の金属構造体と、該第1の金属構造体の全外表面を覆い、かつそれに直接機械的に接触する第2の金属構造体とを含み、
前記第1の金属構造体の前記全外表面は、前記第1の金属構造体を完全に取り囲み、
前記第1の金属構造体は第1の金属材料からなり、
前記第2の金属構造体は、前記第1の金属材料とは異なる第2の金属材料からなる、
請求項13に記載の電気的構造体。 - はんだで構成されるはんだ相互接続構造体をさらに含み、
前記第1の基板は第3の導電性パッドを含み、
前記第2の基板は第4の導電性パッドを含み、
前記はんだ相互接続構造体は、前記第3の導電性パッドを前記第4の導電性パッドに電気的かつ機械的に接続する、
請求項13に記載の電気的構造体。 - 前記相互接続構造体を取り囲み、かつ前記第1の基板と前記第2の基板との間の空間を充填する、ウェハ・レベルのアンダーフィル封止材料の第1の層をさらに含む、請求項13に記載の電気的構造体。
- 電気的構造体を形成する方法であって、
第1の導電性パッドを含む第1の基板と、第2の導電性パッドを含む第2の基板と、円筒形状を備えた無はんだ金属コア構造体を含むトランスファー膜とを準備するステップと、
前記第1の導電性パッド上に第1のはんだ構造体を形成するステップと、
前記第1のはんだ構造体を前記形成するステップの後で、前記無はんだ金属コア構造体の第1の側面が前記第1のはんだ構造体と接触するように、前記トランスファー膜を配置する第1の位置決めステップと、
前記第1の位置決めステップの後で、前記第1のはんだ構造体を溶融させて前記無はんだ金属コア構造体の前記第1の側面と前記第1の導電性パッドとの間に電気的かつ機械的な接続を形成するのに十分な温度まで前記無はんだ金属コア構造体を加熱する第1の加熱ステップと、
前記第1の加熱ステップの後で、前記無はんだ金属コア構造体から前記トランスファー膜を除去するステップと、
前記第2の導電性パッド上に第2のはんだ構造体を形成するステップと、
前記第2のはんだ構造体を前記形成するステップの後で、前記無はんだ金属コア構造体の第2の側面が前記第2のはんだ構造体と接触するように、前記無はんだ金属コア構造体を含む前記第1の基板を配置する第2の位置決めステップと、
前記第2の位置決めステップの後で、前記第2のはんだ構造体のはんだを溶融させ、前記無はんだ金属コア構造体の前記第2の側面と前記第2の導電性パッドとの間に電気的かつ機械的な接続を形成するのに十分な温度まで前記無はんだ金属コア構造体を加熱して前記第1の導電性パッドと前記第2の導電性パッドとの間に電気的かつ機械的な接続をもたらす第2の加熱ステップと
を含む方法。 - 前記第1のはんだ構造体を前記形成するステップは、溶融はんだの第1の部分を、該溶融はんだの第1の部分で充填された第1のキャビティを含むトランスファー基板から、前記第1の導電性パッドに塗布するステップを含み、
前記第2のはんだ構造体を前記形成するステップは、溶融はんだの第2の部分を、該溶融はんだの第2の部分で充填された第2のキャビティを含む前記トランスファー基板から、前記第2の導電性パッドに塗布するステップを含む、
請求項20に記載の方法。 - 前記無はんだ金属コア構造体から前記トランスファー膜を前記除去するステップは、前記トランスファー膜にレーザアブレーションを用いてトランスファー膜から前記無はんだ金属コア構造体を解放するステップを含む、請求項20に記載の方法。
- 前記トランスファー膜は、前記無はんだ金属コア構造体に熱分解性接着剤で接合される、請求項20に記載の方法。
- 前記無はんだ金属コア構造体から前記トランスファー膜を前記除去するステップの後で、ウェハ・レベルのアンダーフィル封止材料層を前記第1の基板に塗布するステップをさらに含む、請求項20に記載の方法。
- 電気的構造体を形成する方法であって、
第1の導電性パッドを含む第1の基板と、第2の導電性パッドを含む第2の基板と、第1のキャビティを含む第1のトランスファー基板と、球形状を備え、前記第1のキャビティの直径よりも小さな直径を備えた無はんだ金属コア構造体とを準備するステップと、
前記第1の導電性パッド上に第1のはんだ構造体を形成するステップと、
前記第1のトランスファー基板内の前記第1のキャビティ内に前記無はんだ金属コア構造体をディスペンスするステップと、
前記ディスペンスするステップの後で、前記無はんだ金属コア構造体の表面の第1の部分が前記第1のはんだ構造体と接触するように、前記第1のトランスファー基板を配置する第1の位置決めステップと、
前記第1の位置決めステップの後で、前記第1のはんだ構造体を溶融させて前記無はんだ金属コア構造体の前記表面の前記第1の部分と前記第1の導電性パッドとの間に電気的かつ機械的な接続を形成するのに十分な温度まで前記無はんだ金属コア構造体を加熱する第1の加熱ステップと、
前記第1の加熱ステップの後で、前記無はんだ金属コア構造体から前記第1のトランスファー基板を除去するステップと、
前記第2の導電性パッド上に第2のはんだ構造体を形成するステップと、
前記無はんだ金属コア構造体の前記表面の第2の部分が前記第2のはんだ構造体と接触するように、前記無はんだ金属コア構造体を含む前記第1の基板を配置する第2の位置決めステップと、
前記第2の位置決めステップの後で、前記第2のはんだ構造体のはんだを溶融させ、前記無はんだ金属コア構造体の前記表面の前記第2の部分と前記第2の導電性パッドとの間に電気的かつ機械的な接続を形成するのに十分な温度まで前記無はんだ金属コア構造体を加熱して前記第1の導電性パッドと前記第2の導電性パッドとの間に電気的かつ機械的な接続をもたらす第2の加熱ステップと
を含む方法。 - 前記第1のはんだ構造体を前記形成するステップは、溶融はんだの第1の部分を、該溶融はんだの第1の部分で充填された第2のキャビティを含む第2のトランスファー基板から、前記第1の導電性パッドに塗布するステップを含み、
前記第2のはんだ構造体を前記形成するステップは、溶融はんだの第2の部分を、該溶融はんだの第2の部分で充填された第3のキャビティを含む前記第2のトランスファー基板から、前記第2の導電性パッドに塗布するステップを含む、
請求項25に記載の方法。 - 前記無はんだ金属コア構造体を前記第1のトランスファー基板内の前記第1のキャビティ内に前記ディスペンスするステップは、前記無はんだ金属コア構造体を液体媒体中にディスペンスするステップを含み、
前記液体媒体は、フラックス剤、水、アルコール及び熱分解性可溶ポリマー接着剤からなる群から選択された液体を含む、
請求項25に記載の方法。 - 前記第1の位置決めステップ及び前記第2の位置決めステップは、気体フラックス剤を用いてはんだ濡れプロセスを支援するステップを含む、請求項25に記載の方法。
- 前記無はんだ金属コア構造体から前記トランスファー基板を前記除去するステップの後で、ウェハ・レベルのアンダーフィル封止材料層を前記第1の基板に塗布するステップをさらに含む、請求項25に記載の方法。
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