Patent ID: 8313795

Claim:
A method for manufacturing a thin film, comprising: mixing a thin-film forming material and a surfactant to prepare a dispersion in which the thin-film forming material is dispersed; forming a dispersion film from the dispersion at an inner circumference side of ring-shaped holding means; wherein forming the dispersion film comprises immersing at least a portion of the ring-shaped holding means in the dispersion; relatively moving a cylindrical supporter and the dispersion film, while the cylindrical supporter and the dispersion film in contact with each other so that the dispersion is transferred to a surface of the cylindrical supporter with a film shape, the cylindrical supporter being disposed between a central portion of an inside space of the ring-shaped holding means and an outer circumference of the ring-shaped holding means and along an inner circumference of the ring-shaped holding means; and drying the dispersion having the film shape formed on the surface of the cylindrical supporter to form the thin film.