PCBSky

The basic structure of a  multilayer flexible PCB   is as follows: Copper foil:It is basically divided into electrolytic copper and rolled copper. Common in thickness are 1oz 1/2oz and 1/3 oz. Substrate film: It is commonly used in thicknesses of 1 mil and 1/2 mil. Glue (adhesive): Thickness depends on customer requirements. Multilayer flexible PCB cover film protection film (Cover Film) Cover film protection film: It is used for surface insulation. Common thickness is 1mil and 1/2mil. Glue (adhesive): Thickness depends on customer requirements. Release paper: It prevents the adhesive from sticking to foreign objects before pressing and easy to work. Multilayer flexible PCB reinforcing plate (PI Stiffener Film) Reinforcement plate: It reinforces the mechanical strength of FPC and facilitates surface mounting operations. Common thicknesses range from 3 mils to 9 mils. Glue (adhesive): Thickness depends on customer requirements. Release paper: It prevents the adh...

1.  Multilayer flexible PCB  raw materials (1) It is divided into glued materials and glueless materials. The copper on the material is divided into copper and calendered copper, and the material without rubber and copper is better in flexibility and folding. (2) Thickness of material: PI+ copper thickness 2. Multilayer flexible PCB cover film The cover film consists of PI and glue. 3. Reinforce Reinforcement generally has the following types: PI reinforcement, PED reinforcement, FR4 reinforcement, steel sheet reinforcement, etc. Generally, the thickness of the reinforcement is PI1/2 1/2, PI11, PI21, PI31 to PI91. The two values after PI represent the thickness of the PI and the thickness of the glue, respectively, in units of Mil. The thickness is based on customer requirements. 4. Pure glue Pure glue is mainly used for lamination and layering of multi-layer boards, and also for bonding reinforcement. 5. Multilayer flexible PCB screen It mainly acts as a signal ...