Patent ID: 7648902

Claim:
A method of manufacturing a redistribution circuit structure, comprising: providing a substrate having a plurality of pads and a passivation layer thereon, wherein the passivation layer has a plurality of first openings, and each of the first openings exposes a portion of the corresponding pad; forming a first patterned photoresist layer on the passivation layer, wherein the first patterned photoresist layer has a plurality of second openings, and each of the second openings exposes a portion of the corresponding pad; forming a plurality of first bumps inside the openings; forming a first under ball metal (UBM) material layer over the substrate to cover the first patterned photoresist layer and the first bumps; forming a plurality of conductive lines on the first UBM material layer above the first bumps; and patterning the first UBM material layer using the conductive lines as a mask to form a plurality of first UBM layers.