Patent ID: 9666548
Date: 2017-05-30
CPC Classifications: C23C,C25D,H01L,H05K,Y10T

Claim:
1. A method of fabricating a connection structure for a substrate, comprising: providing a substrate having a plurality of connection pads and an insulation protection layer formed thereon wherein the connection pads are exposed from the insulation protection layer; forming on the insulation protection layer a first resist layer having a plurality of first openings for the connection pads and a portion of the insulation protection layer to be exposed therefrom; forming a metallic structure in the first openings and on the first resist layer; removing the metallic structure on the first resist layer, allowing the metallic structure to be disposed in the first openings only and act as a metallic layer, the metallic layer being thus formed on exposed surfaces of the connection pads and extending to the insulation protection layer; removing the first resist layer; and forming a plurality of conductive bumps on the metallic layer, each of the conductive bumps having a width less than a width of the exposed surface of each of the connection pads.