Polyimide black film is a type of covering film developed by our company for flexible circuit boards with structural confidentiality requirements. While maintaining the excellent insulation properties, high heat resistance and dimensional stability of polyimide, it also possesses excellent shielding capabilities, making the precise circuit structure less susceptible to being deciphered. At the same time, its extremely low gloss can prevent the generation of glare, thereby reducing the probability of CCD misjudgment for customers.