What are the materials of flexible PCB
What are the materials of flexible PCB? Next, the professional flexible circuit board manufacturer of YMSHENG will introduce the composition materials of flexible PCB to you. 1. insulation substrate Insulation substrate is a flexible separating film. As the insulation carrier of the FPC flexible circuit board, the choice of flexible dielectric film needs to completely probe the heat resistance, content, viscosity, mechanical and electrical parcels of the material. Polyimide, polyester, and PTFE membranes are now generally used. 2. Overlay The covering caste is an separating protective caste covering the face of the FPC flexible circuit board, which can cover the face drivers and meliorate the strength of the substrate. The external graphic protection material generally has the dry film type ( cover film) and the photosensitive development type two. 3. Underpinning plate The strengthening plate is attached to the original position of the flexible plate, which has the ...