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Amorphous fluoropolymer (AF) thin film (0.9-1 μm), which has no-pinhole and uniform surface and numerous pores in the matrix, has been prepared from a solution of Teflon AF 1600 by a spin-coating method. Thermal annealing at 400 o C for 30 min does not cause obvious deterioration of the film surface morphology. The mechanism for the formation of the film with a novel structure is discussed...
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