Patent ID: 8039384

Claim:
A method of making a semiconductor device, comprising: providing a substrate; forming a first patterned photoresist layer over the substrate; forming first conductive layers having a first height in the first patterned photoresist layer; removing the first patterned photoresist layer; forming a second patterned photoresist layer over the substrate; forming second conductive layers having a second height in the second patterned photoresist layer, the second height greater than the first height, each second conductive layer being positioned adjacent to a first conductive layer and each first conductive layer being positioned adjacent to a second conductive layer, and wherein a pitch between the first conductive layer and the second conductive layer is less than sixty (60) micrometers; removing the second patterned photoresist layer; and forming first bumps and second bumps over the first and second conductive layers, respectively, wherein second bumps overlap neighboring first bumps, wherein a height and a width of the first bumps are substantially the same as a height and a width of the second bumps, and wherein uppermost surfaces of the second bumps are vertically offset from uppermost surfaces of the first bumps.