Patent ID: 9646905
Date: 2017-05-09
CPC Classifications: G06K,H01L

Claim:
1. A fingerprint sensor package, comprising: a substrate; a first fingerprint sensor die disposed on the substrate; a molding compound layer disposed on the substrate, encapsulating the first fingerprint sensor die; wherein there are no fillers in a first portion of the molding compound layer disposed over a top surface of the first fingerprint sensor die, a thickness of the first portion is less than or equal to 10 μm, and the first portion has a planar top surface; and a plurality of fillers dispersed in a second portion of the molding compound layer surrounding a side surface of the first fingerprint sensor die; wherein a top surface of the second portion is coplanar with a top surface of the first fingerprint sensor die, and wherein the first portion is directly on the top surface of the second portion.