HASL / LF-HASL
A mature, economical choice for general-purpose boards and cost-sensitive projects. Lead-free HASL supports RoHS requirements.
PCB Surface Finishes
Choose the right PCB surface finish based on product use, pad design, reliability requirements and budget.
Common Finishes and Applications
Surface finishes protect exposed copper and provide a reliable soldering or contact surface. These are the most common choices; special requirements can be discussed during quotation.
ENIG
Flat pads and good storage stability make ENIG suitable for fine-pitch components, BGA and high-reliability products.
OSP
A flat, cost-effective finish for volume SMT products, with more specific storage and reflow requirements.
Immersion Silver
Good flatness and high-frequency performance for communications, RF and selected automotive applications.
Hard Gold
High wear resistance for edge connectors, contact fingers and areas requiring repeated mating cycles.
Quick Selection Guidance
For general cost-sensitive boards, lead-free HASL is often suitable. Fine-pitch, BGA and high-reliability products commonly use ENIG; volume SMT may use OSP; RF applications may benefit from immersion silver; connector contacts typically use hard gold. Final selection should be confirmed against the drawing, materials and downstream process.
Not sure which finish to choose?
Our engineers will recommend the best finish for your application.