Patent ID: 9068267
Filing Date: 2015-06-30
Classification: C09K,C23F,H01L,Y02E

Abstract:
1. An etching liquid composition which is used to collectively etch a multilayer film formed of an indium oxide-based coating film and a metal-based coating film characterized in that the etching liquid composition is formed of an aqueous solution that contains: (A) a ferric ion component; (B) a hydrogen chloride component; and (C) a component that is at least one type of compound selected from the group consisting of a compound represented by general formula (1) below and a straight chain or branched chain alcohol having 1 to 4 carbon atoms: wherein R 1 and R 3 are each independently a hydrogen atom or a straight chain or branched chain alkyl group having 1 to 4 carbon atoms, R 2 is a straight chain or branched chain alkylene group having 1 to 4 carbon atoms, and n is a number between 1 and 3.