GERMANIUM-CONTAINING HIGH-REFRACTIVE-INDEX THIN FILM AND PRODUCTION METHOD THEREOF

摘要

There is provided a high refractive-index coating film and a production method of the high refractive-index coating film. The production method comprises producing a coating film containing a germanium compound containing a Ge—Ge bond as a backbone thereof, and baking the coating film under vacuum or in an inert gas atmosphere. The high refractive-index coating film produced by the method is soluble in a solvent and has a high moldability and film-formation property, and has a high refractive index of 1.8 or more and further 2.3 or more, and is chemically stable.