Patent ID: 9570413
Date: 2017-02-14
CPC Classifications: H01L

Claim:
1. A method comprising: performing a reflow to form a solder bump at a surface of a wafer, wherein the wafer comprises: dispensing a molding compound, wherein at least a lower part of the solder bump is molded in the molding compound; pushing away excess portions of the molding compound using a release film, wherein the excess portions comprise a portion over the solder bump; peeling off the release film from the molding compound and the solder bump; and after the excess portions of the molding compound are pushed away, performing a laser etch on the molding compound, wherein after the laser etch, the top end of the molding compound is lowered to a level below a maximum-diameter plane, wherein the maximum-diameter plane is parallel to a major surface of the substrate, and wherein a maximum-diameter of the solder bump is in the maximum-diameter plane.