Hi all I wonder if anybody is familiar with reliable wafer thinning service providers with fast turnaround time. I need to thin some 525um thick 4" silicon wafers down to 200um. I've asked for quote from several wafer vendors and some wafer thinning companies. Either the prices is too high, ~$90/piece, or the turnaround time is too long, ~3weeks. I wonder if anybody knows thinning service providers with a good compromise in price and time. Thanks a lot . Best Leo Xiaoguang "Leo" Liu Birck Nanotechnology Center, Purdue University, 1205 W.State Street, West Lafayette, IN, 47906 USA liu79@purdue.edu