发明名称 |
Methodology to control underfill fillet size, flow-out and bleed in flip chips (FC), chip scale packages (CSP) and ball grid arrays (BGA) |
摘要 |
In a method and system for underfilling a gap ( 140 ) disposed between a substrate ( 120 ) and a die ( 110 ), a selective surface ( 152 ) of the substrate ( 120 ) is treated by a plasma source. A matching surface ( 154 ) of the die ( 110 ) may be treated by the plasma source. The treating results in a roughening of the selective surface ( 152 ) and the matching surface ( 154 ). The roughening improves welting of an underfill ( 150 ) on the selective surface ( 152 ) and the matching surface ( 154 ) compared to a non-treated surface. The underfill ( 150 ) is dispensed to substantially fill the gap ( 140 ) disposed between the selective surface ( 152 ) and the matching surface ( 154 ) of the die 110 . The underfill ( 150 ) is substantially contained within the gap ( 140 ) by the wetting, which reduces the backflow and the bleed of the underfill ( 150 ).
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申请公布号 |
US2007269930(A1) |
申请公布日期 |
2007.11.22 |
申请号 |
US20060437310 |
申请日期 |
2006.05.19 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
GUPTA VIKAS;ODEGARD CHARLES ANTHONY |
分类号 |
H01L21/00 |
主分类号 |
H01L21/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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