Patent ID: 7748111

Claim:
A manufacturing process of a carrier, the manufacturing process comprising: providing a first substrate having a first surface, a second surface opposite to the first surface, a first through hole within the first substrate extending from the first surface to the second surface, a first circuit layer having a plurality of first contacts being formed on the first surface, and a first metallic layer being formed on the second surface and on an inner wall of the first through hole, wherein the first circuit layer is electrically connected to the first metallic layer; forming a first solder mask on the first circuit layer and in the first through hole, wherein the first solder mask exposes the first contacts; and providing a second substrate having a third surface, a fourth surface opposite to the third surface, and an opening extending from the third surface to the fourth surface, the fourth surface of the second substrate being bonded to the first surface of the first substrate, wherein the opening exposes the first solder mask and the first contacts of the first substrate.