Patent ID: 9349661
Filing Date: 2016-05-24
CPC Classification: H01L

Claim Text:
1. A method of backside thinning endpoint detection, comprising: applying a bonding layer to a semiconductor wafer; attaching a wafer handle to the semiconductor wafer using the bonding layer, wherein the wafer handle comprises: a non-conductive substrate; a first conductive post traversing the non-conductive substrate; a second conductive post traversing the non-conductive substrate; periodically performing a measurement of an electrical parameter using the wafer handle while performing a wafer backside thinning process, wherein the backside thinning process utilizes a conductive slurry; terminating the wafer backside thinning process in response to detection of a change in the measured electrical parameter; and wherein the semiconductor wafer comprises a plurality of test structures, and wherein the wafer handle comprises a plurality of conductive posts spatially corresponding to the plurality of test structures, the method further comprising: