Patent ID: 7858200

Claim:
An adhesive film comprising: a heat resistant layer containing a non-thermoplastic polyimide; and an adhesive layer on at least one surface of the heat resistant layer, the adhesive layer containing a thermoplastic polyimide, wherein a thermal shrinkage ratio in a TD direction is +0.01% or more, wherein a thermal shrinkage ratio in an MD direction is −0.02% or less, wherein tensile elastic moduli in the TD direction and MD direction are within a range of 5.0 to 11 GPa, and wherein the thermal shrinkage ratio is calculated by subjecting the adhesive film to a heat shrinkage measurement process comprising: storing the adhesive film at 23° C. and 55% relative humidity for 2 days, measuring the adhesive film in a film dimension L1 , heating the adhesive film to 250° C. for 30 minutes, storing the adhesive film at 25° C. and 60% relative humidity for 2 days, measuring the adhesive film in a film dimension L2, calculating the thermal shrinkage ratio in the TD direction, and calculating the thermal shrinkage ratio in the MD direction.