| abstract |
The purpose of the present invention is to provide a pressure-sensitive adhesive film through which air bubbles trapped at the bonding interface upon application of the pressure-sensitive adhesive film are apt to disappear at ordinary temperature and ordinary pressure.nAn embodiment of the pressure-sensitive adhesive film according to the present invention is characterized by including at least one pressure-sensitive adhesive layer that meets the following (a) to (c): (a) to have a coefficient of nitrogen gas diffusion of 1.5×10 -6 cm 2 /sec or greater; (b) to have a shear modulus measured at a temperature of 25ºC and a frequency of 1 Hz, G'(1 Hz), of 5×10 2 to 1.0×10 5 Pa; and (c) to give an infrared absorption spectrum which has an absorption peak at 800-820 cm -1 but has no absorption peak at 1,000-1,020 cm -1 . |