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半导体学报 2001
Underfill Delarnination and Solder Joint Failure of Flip Chip on Board
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Abstract:
The delamination propagation behavior at the interface between the chip and the underfill is investigated and the crack propagation rates are measured via C SAM inspection for two types (B & D) of flip chip packages under thermal cycle loading.Meanwhile,in the related simulations of the element,the strain energy releasing rates near the crack tip under different conditions can be calculated by employing the fracture mechanical method.Then,the Paris half empirical equation,used as design criteria of flip chip package reliability,is determined with the crack propagation rates and the energy release rates obtained.