Patent ID: 7238421
Filing Date: 2007-07-03
Classification: C09J,H01L,Y10T

Abstract:
1. A surface protecting adhesive film for a semiconductor wafer comprising a base film having a front surface and a back surface and having a melting point of at least 200° C. and a thickness of 10 to 200 μm and an acrylic adhesive layer having a storage elastic modulus from 1×10 5 Pa to 1×10 7 Pa at 150° C., an adhesive force from 5g/25 mm to 500g/25 mm in regard to an SUS304-BA plate and a thickness of from 3 to 100 μm whereby the acrylic adhesive layer can be peeled away from a semiconductor wafer surface, wherein the acrylic adhesive layer is formed on both of the front surface and the back surface of the base film wherein the SUS304-BA plate is defined in accordance with Japanese Industrial Standard.