Abstract
We prepared porous films using micro-phase separation of block copolymer and selective etching process. We measured the cross-plane thermal conductivities of various processed thin films by using a differential 3ω method. Thermal conductivity of micro-phase separated BCP1 film was 0.25W/(m・K), the value was 19% higher than that of as casted BCP1 film. The thermal conductivity of the thin film was increased for molecular orientation of polymer chain. Thermal conductivities of porous films were the lower than those of both casted films and micro-phase separated films. We controlled thermal conductivities of block copolymer films by using the molecular orientation and the porosity.
