Patent ID: 9455159
Filing Date: 2016-09-27
CPC Classification: H01L

Claim Text:
1. A fabrication method of a packaging substrate, comprising the steps of: providing a carrier having a first metal layer and a second metal layer formed thereon; forming a first circuit layer on the second metal layer and forming a separating portion on an edge of the second metal layer, wherein the separating portion is spaced from the first circuit layer; forming a dielectric layer on the second metal layer and the first circuit layer, so as for the first circuit layer and the separating portion to be embedded in the dielectric layer, and a portion of the dielectric layer to be positioned between the first circuit layer and the separating portion; forming a second circuit layer on the dielectric layer and forming a plurality of conductive vias in the dielectric layer for electrically connecting the first and second circuit layers; and removing the carrier and the first metal layer by the separating portion.