Patent ID: 7473629

Claim:
A process for making a substrate structure having a solder mask, comprising the steps of: (a) providing a substrate having a top surface, the top surface having a die pad and a plurality of solder pads; (b) forming a first solder mask on the top surface, the first solder mask having a plurality of openings, each opening corresponding to each solder pad so as to expose at least part of the solder pad; and (c) forming a second solder mask on the first solder mask, wherein the second solder mask exposes the first solder mask covering the die pad, the first solder mask covering the die pad is defined as a first portion, the first solder mask and the second solder mask as stacked on the first solder mask on and around the top surface are defined as a second portion, and a height of the second portion is larger than a height of the first portion.