Feature | Flexible Solder Mask | FPC Coverlay |
Material | Liquid polymer (epoxy or photoimageable) | Polyimide film with adhesive |
Application Method | Screen printing or spray coating | Lamination using heat and pressure |
Thickness | Thin, typically 20-30 microns | Thicker, typically 50-100 microns |
Durability | Moderate protection | High protection against bending/stress |
Cost | More cost-effective | Higher material and processing costs |
Design Complexity | Suitable for fine-pitch and intricate designs | Better for simple, robust designs |
Flexibility | Good flexibility but less robust | Excellent flexibility and mechanical strength |
Solderability starts at the surface.
— POE PCB/PCBA Manufacturer (@poe_pcba) June 30, 2025
HASL, ENIG, OSP, Immersion Tin — each finish plays a critical role in protecting your PCB.
Choosing the right one for better performance, longer life, and lower cost. #PCB #SurfaceTreatment #ENIG #OSP #HASL #ElectronicsManufacturing pic.twitter.com/KRxASXxqJN
Since 1996, POE has become a globally renowned PCB company, providing small to medium volume PCB/ PCBA manufacturing services.