| abstract |
Coating a solution containing a dissolved organic resin having the structure of Formula 1 onto a substrate, and exposing the coated substrate to an oxygen atmosphere having an oxygen partial pressure of 0.01 atm or less at a temperature of 200 ° C. or higher. Manufacturing method:n n n n n n n n n n [Wherein, R 1 to R 8 are each independently a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom and an iodine atom, an alkyl group having 1 to 10 carbon atoms, a 2 to 10 carbon atom and containing a double bond; Functional group, a functional group having 2 to 10 carbon atoms and comprising a triple bond, a methoxy group, an ethoxy group and a propoxy group. |