Surface Finish Guide
ENIG vs HASL for PCB manufacturing.
ENIG and HASL are common PCB surface finishes. Selection depends on pad flatness, assembly process, storage expectation and product requirements.
| Factor | ENIG | HASL |
|---|---|---|
| Pad flatness | Very flat surface | Less flat surface |
| Fine pitch | Often preferred for dense assembly | Review carefully for fine-pitch parts |
| Typical products | HDI PCB, BGA boards, dense modules | General FR4 boards and standard assemblies |
Manufacturing considerations
ENIG is commonly reviewed for fine pitch and flat pad needs. HASL is commonly reviewed for standard board applications. Final selection should consider assembly requirements and customer standards.
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