Patent ID: 7126211

Claim:
A circuit carrier, applied for connecting to at least a bump of a chip, comprising: a substrate having a surface; at least a contact pad disposed on the surface of the substrate, for connection with the bump; a solder mask layer covering the surface of the substrate and having at least a stepped opening formed above the contact pad, wherein the stepped opening exposes a portion of the contact pad and the stepped opening includes a first opening and a second opening, wherein the second opening is closer to the contact pad, while the first opening is farther from the contact pad, and a size of the first opening is larger than that of the second opening; a pre-solder paste disposed on the exposed portion of the contact pad and in the stepped opening of the solder mask layer, wherein the contact pad is connected to the bump through the pre-solder paste; and an electro-migration resistive layer disposed between the pre-solder paste and the exposed portion of the contact pad for increasing electro-migration resistance.