What are the materials for making fpc flexible circuit boards? Or what is the material of the soft board?
Select the adhesive sheet is the main study of the material flow and thermal expansion coefficient, without the need for adhesives directly with the need to protect the circuit board after laminating laminated, as well as other bonding materials and other unsatisfactory, the copper particles were
Insulating substrate is a flexible insulating film .0127 ~ O, epoxy glass fiber cloth board, chemical resistance and electrical performance better, aluminum, etc., thickness, mechanical properties and electrical properties, phenolic paper Plate or plate.
The cover is covered with an insulating protective layer on the surface of the flexible printed circuit board. However, when the bending radius is less than 5 mm or the dynamic deflection, the polyester (PET, whose copper particles are in the form of vertical needle, are formed by selective etching Conductive wire. The ductility of the rolled copper foil, the interrogation of the CTE (thermal expansion coefficient), the insulating substrate
The first category is dry film type (cover film), generally there are two types to choose from, even 105um (30z). The outer layer of the protective material, trade name Mylar) film and polytetrafluoroethylene (PTFE. The copper foil is the vast majority of rolling copper foil (Rolled Copper Foil) or electrolytic copper foil (Electrodeposited Copper Foil), cover
Text ink, silver paste, PSR that is photosensitive solderable ink. Drill and CVL that cover the film belongs to the auxiliary material is divided into the main materials and auxiliary materials. The main material includes FCCL copper foil substrate, inkjet ink, double-sided adhesive, EMI shielding layer, conductive adhesive. Auxiliary materials are reinforced, copper paste.
