Patent ID: 7698813

Claim:
A method for fabricating a conductive blind via of a circuit substrate, the method comprising: providing a circuit substrate comprising a first dielectric layer, a patterned circuit layer, a second dielectric layer and a metal circuit layer, wherein the patterned circuit layer is disposed between the first dielectric layer and the second dielectric layer, the metal circuit layer is disposed on the second dielectric layer and opposite to the patterned circuit layer, and the patterned circuit layer comprises at least one capture pad; forming a blind via extending through the metal circuit layer by laser drilling and the second dielectric layer, wherein the blind via exposes the capture pad; performing an electroless process to form an electroless copper layer on the capture pad and an inner wall of the blind via; removing the electroless copper layer on the capture pad; and filling a conductive material in the blind via to form a conductive blind via for electrically connecting the metal circuit layer and the patterned circuit layer.