Flexible circuit board, cof module, and electronic device including same

Abstract

A flexible circuit board according to an embodiment includes a substrate; a conductive pattern part disposed on the substrate; and a protective layer disposed on the substrate and including an open region, and wherein at least one of the substrate, the conductive pattern part, and the protective layer includes a concave part concavely provided in a thickness direction of the substrate, and the concave part does not penetrate at least one of the substrate, the wiring pattern part, and the protective layer along the thickness direction.