COATING LIQUID FOR FORMING LEVELING FILM AND METAL FOIL COIL PROVIDED WITH LEVELING FILM

摘要

A metal foil coil having a flattening film capable of forming an electronic device by a roll to roll process is provided. 0.1 to 1 mol of acetic acid and 0.005 to 0.05 mol of organic tin are added as a catalyst to 1 mol of phenyltrialkoxysilane in the organic solvent and hydrolyzed with water of 2 mol or more and 4 mol or less, At a temperature of not higher than 50 DEG C and a resin obtained by distilling off the organic solvent under reduced pressure is dissolved in an aromatic hydrocarbon solvent to form a flattening film-forming coating liquid on the metal foil coil in a film thickness of from 2.0 mu m to 5.0 mu m. When insulation coating is applied to the metal foil coil before the planarizing film is formed, high insulation reliability is obtained. When a stainless steel foil having a reflective film is used, a highly efficient light emitting device can be obtained.