Patent ID: 7927169

Claim:
A method of manufacturing a thin film, the method comprising: mixing carbon nanofibers into an elastomer including an unsaturated bond or a group having affinity to the carbon nanofibers, and dispersing the carbon nanofibers by applying a shear force to obtain a carbon fiber composite material; mixing the carbon fiber composite material and a solvent to obtain a coating liquid; and applying the coating liquid to a substrate to form a thin film; wherein a network component of the elastomer in an uncrosslinked form has a spin-spin relaxation time (T 2 n ) measured at 30° C. by a Hahn-echo method using a pulsed nuclear magnetic resonance (NMR) technique with 1 H as an observing nucleus of 100 to 3,000 μsec, and wherein obtaining the carbon fiber composite material is performed at 0 to 50° C.