Patent ID: 8365401
Filing Date: 2013-02-05
Classification: H05K,Y10T

Abstract:
1. A method of manufacturing a circuit board, comprising: providing a circuit substrate having a first surface and at least one first circuit; forming a dielectric layer on the circuit substrate, and the dielectric layer covering the first surface and the at least one first circuit, wherein the dielectric layer has a second surface and a metal layer and a barrier layer covering the metal layer are formed on the second surface; irradiating the barrier layer with a laser beam to form an intaglio pattern extending from the barrier layer to the second surface of the dielectric layer and at least one blind via extending to the at least one first circuit of the circuit substrate; forming a first conductive layer within the intaglio pattern, the at least one blind via, and the barrier layer; forming a second conductive layer on the first conductive layer; and removing a portion of the second conductive layer, the barrier layer, the metal layer, and a portion of the first conductive layer to form a patterned circuit structure and expose the second surface of the dielectric layer, wherein the patterned circuit structure is disposed within the intaglio pattern and the blind via and electrically connected to the at least one first circuit of the circuit substrate.