Flip-chip bonding structure on substrate for flip-chip package application

摘要

A flip-chip bonding structure on substrate for flip-chip package application is proposed, on which solder bumps can be bonded for electrically coupling a flip chip to the substrate. The proposed flip-chip bonding structure is characterized in that its solder-bump pads can be dimensionally-invariable irrespective of a positional deviation in solder mask due to misalignment. Moreover, the proposed flip-chip bonding structure can help allow each attached solder bump to be reduced in horizontal extent as compared to the prior art, so that neighboring solder bumps would be less likely short-circuited to each other and flip-chip underfill can be more easily implemented.