Patent ID: 9485874
Filing Date: 2016-11-01
CPC Classification: H01L,H05K,Y10T

Claim Text:
1. A package substrate, comprising: an interposer having a first side and a second side opposite to the first side; at least one conductive through via penetrating from the first side to the second side; a redistribution layer formed on the first side and electrically connected to the conductive through via; a photo-sensitive dielectric layer formed on the second side of the interposer; a molding layer formed to encapsulate the interposer, wherein a bottom surface of the molding layer is aligned with an end of the conductive through via, and the photo-sensitive dielectric layer directly covers the molding layer and the interposer; and at least one conductive via formed in the photo-sensitive dielectric layer and electrically connected to the conductive through via, wherein the conductive via is in direct physical and electrical contact with the conductive through via, wherein the photo-sensitive dielectric layer is photo-sensitive polyimide (PSPI).