Patent ID: 7419897
Filing Date: 2008-09-02
Classification: H01L,H05K,Y02P

Abstract:
1. A method of fabricating a circuit board having different electrical connect structures, the method comprising: providing a circuit board body formed on a surface thereof with a plurality of first conductive pads, a plurality of second conductive pads and a solder mask layer wherein a plurality of first openings are formed in the solder mask layer to expose the first and the second conductive pads; forming a metal adhesive layer on the first and the second conductive pads exposed from the first openings; forming a conductive layer on the surface of the circuit board and the metal adhesive layer, allowing the conductive layer to electrically connect the first and the second conductive pads; forming a resist layer on the conductive layer, with a plurality of second openings formed to expose a portion of the conductive layer corresponding in position to the second conductive pads; forming a plurality of metal posts on the portion of the conductive layer corresponding in position to the second conductive pads through the second openings by electroplating via the conductive layer; removing the resist layer and the conductive layer thereunder, to thereby expose the metal adhesive layer formed on the first conductive pads and the metal posts formed on the portion of the conductive layer overlied the second conductive pads, so as to allow the metal adhesive layer and the first conductive pads to form a plurality of first electrical connection structures; and forming a solder layer on the metal posts, so as to allow the solder layer, the metal posts, the portion of the conductive layer overlied the second conductive pads, and the second conductive pads to form a plurality of second electrical connection structures.