Mobile phone PCB film, a silicone adhesive single sided polyester film has high heat resistance & great insulation effect used for silicone removal and for protection of various adherends. The tape is green in color which allows to easily distinguish between an adherend and the tape. It has low adhesion and easily remove so no residue after peel off. Dry film is a polyester film coated with a polymer which is sensitive to ultraviolet light (Photoresist). It adheres by heat to the PCB and allows you to print circuits using any photolithography method. A printed circuit board (PCB) mechanically supports and electrically connects electronic components or electrical components using conductive tracks, pads and other features etched from one or more sheet layers of copper laminated onto and/or between sheet layers of a non-conductive substrate. Components are generally soldered onto the PCB to both electrically connect and mechanically fasten them to it. Printed circuit boards are used in all but the simplest electronic products. They are also used in some electrical products, such as passive switch boxes. Printed circuit boards are mainly used in products of information technology, communications, automobiles, semiconductors, consumer electronics, etc. Not only do permanent materials such as substrates, interlayer, outermost solder protection and soldered connection materials differ based on the requirements of different products, but the requirements of indirect materials used in the manufacturing process will also be different.