Patent ID: 9716027
Date: 2017-07-25
CPC Classifications: H01L

Claim:
1. A method of manufacturing a semiconductor device, comprising: (a) forming a circuit on a first surface of a semiconductor wafer, the semiconductor wafer having a second surface opposite to the first surface; (b) grinding the second surface of the semiconductor wafer such that a first part is thinner than a second part surrounding the first part; (c) attaching a bonding surface of a first tape to the first surface of the semiconductor wafer; (d) separating the first part from the second part by cutting a part of the first part with a rotary blade in contact with the second surface of the first part, while the semiconductor wafer is held by the first tape; (e) after (d), removing the second part; (f) attaching a bonding surface of a second tape to the second surface side of the first part of the semiconductor wafer while the first tape remains attached to the semiconductor wafer; and (g) after (f), peeling off the first tape from the semiconductor wafer, wherein the first tape includes: wherein the second tape includes: wherein the first adhesive layer is thicker than the second adhesive layer.