Abstract: The present disclosure relates, according to some embodiments, to a method of fabricating a flexible metal-clad laminate comprising forming a metal layer on a surface of a polyimide film, wherein the metal layer and the polyimide film are contacting each other and forming a laminate, and heating the laminate at a temperature of about 80° C. to about 140° C. until a weight loss of the laminate reaches about 1% or higher.