Patent ID: 9631123
Date: 2017-04-25
CPC Classifications: B32B,C09J,H01L,Y10T

Claim:
1. An adhesive sheet for an 8-inch wafer or a 12-inch wafer wound into a roll, the adhesive sheet comprising: a long release film; an adhesive layer provided in a label form on the release film; and a pressure-sensitive adhesive film having a label part covering the adhesive layer and provided so as to be in contact with the release film around the adhesive layer and a peripheral part surrounding an outside of the label part; wherein: a plurality of through holes penetrating the pressure-sensitive adhesive film are provided outside a portion corresponding to a part of the adhesive layer intended to be attached to the wafer; the portion of the adhesive layer intended to be attached to the wafer is 10 mm to 25 mm inside of an outer circumference of the adhesive layer and inside the label part; and the following relationship is satisfied: outer circumference of the adhesive layer× 1/43≦maximum through hole width×number of through holes per label part of the pressure-sensitive adhesive film≦outer circumference of the adhesive layer.