Patent ID: 8728915

Claim:
A wafer laser-marking method, comprising: providing a wafer having a first surface and a second surface opposite to each other, and the first surface having a plurality of bumps; thinning the wafer; fixing the thinned wafer on a non-UV tape such that and the second surface of the wafer is attached to the non-UV tape; and performing a laser marking step such that a laser light penetrates the tape and forms a pattern on the second surface of the wafer; wherein the step of fixing the thinned wafer further comprises: providing a frame on which the non-UV tape is disposed; attaching the second surface of the wafer on the non-UV tape to fix the thinned wafer; and setting a ring on the periphery of the non-UV tape, wherein the ring and the frame are positioned on the opposite sides of the non-UV tape, and the periphery of the non-UV tape is flatly unfolded on the frame to form a flat surface attached to the second surface of the wafer.