Stretchable ACF, method for manufacturing same, and interfacial bonding member and device comprising same

A stretchable anisotropic conductive film (ACF) comprising:

• a polymer film;
• and
• conductive particles inserted and aligned in the polymer film,
• wherein the conductive particles are exposed to an outside of top and bottom surfaces of the polymer film, and 10% to 30% of an outer surface of the conductive particles is exposed to the outside of the polymer film,
• the stretchable ACF has an alignment maintenance degree of 0.8 to 1.0, and the alignment maintenance degree is expressed by the following equation:
• alignment maintenance degree=N/N0,
• wherein, N denotes the number of conductive particles per unit area after a secondary thermocompression, and N0 denotes the number of conductive particles per unit area before the secondary thermocompression.