Inventors:
Dennis Lang - San Jose CA, US
Sonbol Vaziri - Salt Lake City UT, US
James Kent Naylor - Kaysville UT, US
Eric Woolsey - Salt Lake City UT, US
Chung-Lin Wu - San Jose CA, US
Mike Gruenhagen - Salt Lake City UT, US
Neill Thornton - Corvallis OR, US
International Classification:
H01L 23/498
Abstract:
A wafer level chip scale package (WLCSP) includes a semiconductor device with a plurality of solder bump pads, patterned passivation regions above each of the solder bump pads, a patterned under bump metallization (UBM) region on each of the solder bump pads and the passivation regions, a polyimide region over a portion of the UBM regions and the passivation regions, solder bumps formed on each of the UBM regions.