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About us
 Shenzhen KingshengPCBA Tech Co.,Ltd (HK C-Alley Co.,Ltd), an professional PCBA manufactuer and electronics manufacturing service (EMS) provider for 12years.SMT factory has ISO9001, ISO14001, TS16949 certification, advanced production equipment and rich experience in the production of PCBA. more

Flexible PCB Material Selection
Flexible PCB Material Selection
1.The choice of Copper Clad Laminate
The CCL is composed of three layers of "copper foil + glue +substrate". In addition, there is also a non-adhesive material, that is a "copper foil + substrate" two-layer combination, which is high cost and is suitable for products requires more than 100,000 bending times.
a.Copper foil
There are two types Copper foil: Rolled Anneal Copper Foil and Electrodeposited Copper Foil. The rolled copper has better bending performance than electrolytic copper. The thickness is 1/3oz, 1/2OZ, 1OZ, 2OZ.
Commonly used dielectric materials for flexible circuits are PI (Polyamide, glued and non-gel) and PET (Polyester). PI is more expensive, but its flame resistance is better. PET is cheaper but don't have heat resistant. Therefore, if there is welding demand, prefer to use PI material. Generally, there are several 1/2 mil, 1 mil, and 2 mil thicknesses.
Commonly used adhesives for flexible sheets are acrylic and epoxy. The most commonly used is epoxy. The thickness is from 0.4 to 2 mil, and generally 0.7 mil thick glue is used.
2.The choice of Cover Film
The cover film is composed of "substrate + glue", and the substrate is divided into PI and PET, and the thickness includes 0.5~1.4 mil.
3. Selection of Reinforcing Materials
Function: In the flex board area, in order to weld the components, the reinforcing material is added for installation, and the thickness of the flex board is compensated.
Material: PI/PET/FR4/SUS
Combination method: PSA (Pressure Sensitive Adhesive): pressure sensitive type (such as 3M series), Thermal Set: thermosetting type (high bonding strength, solvent resistance, heat resistance, resistance to creep)