Patent ID: 7614146
Filing Date: 2009-11-10
Classification: H05K,Y10T

Abstract:
1. A method for fabricating a circuit board structure, comprising: providing a carrier board having a first surface and a second surface opposed to the first surface, the carrier board having at least a through hole penetrating the first and second surfaces; forming a conductive pillar in the through hole of the carrier board by electroplating and forming a metal layer on the first and second surfaces by electroplating; and patterning the metal layer so as to respectively form a first circuit layer and a second circuit layer on the first surface and the second surface of the carrier board and form end portions of the conductive pillar protruding above the first and second surfaces of the carrier board without the end portions of the conductive pillar covering the first and second surfaces, wherein diameter of the end portions of the conductive pillar is not greater than that of the through hole, and the first and second circuit layers are electrically connected to side peripheries of the end portions of the conductive pillar; wherein width of the circuit of the first and second circuit layers electrically connected to the conductive pillar is not greater than diameter of the through hole.