Invention Grant
US09105647B2 Method of forming perforated opening in bottom substrate of flipchip pop assembly to reduce bleeding of underfill material 有权
在倒装芯片流行组件的底部基底中形成穿孔开口以减少底部填充材料渗出的方法

Method of forming perforated opening in bottom substrate of flipchip pop assembly to reduce bleeding of underfill material
Abstract:
A semiconductor device has a flipchip semiconductor die mounted to a first substrate using a plurality of first bumps. An opening or plurality of openings is formed in the first substrate in a location central to placement of the flipchip semiconductor die to the first substrate. A plurality of semiconductor die is mounted to a second substrate. The semiconductor die are electrically connected with bond wires. An encapsulant is over the plurality of semiconductor die and second substrate. The second substrate is mounted to the first substrate with a plurality of second bumps. An underfill material is dispensed through the opening in the first substrate between the flipchip semiconductor die and first substrate. The dispensing of the underfill material is discontinued as the underfill material approaches or reaches a perimeter of the flipchip semiconductor die to reduce bleeding of the underfill material. The underfill material is cured.
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