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Copper-protective Coating
December 31, 1969 |Estimated reading time: Less than a minute
The ENTEK CU-77 copper-protective coating system is an alternative to HASL and other metallic PCB finishes. It is designed for coating single-sided PCBs that require one soldering step (glue cure followed by wave soldering). The material delivers a thin coating (200 to 400 Å) and reportedly provides improved storage and handling capabilities compared to anti-tarnishes. PCBs coated with this are said to have up to a 12-month shelf life. The aqueous-based system is composed of a pre-clean cycle and an imidazole-based organic coating. It reportedly produces PCBs that exhibit flat, highly solderable pad surfaces that facilitate solder paste application and fine-pitch component placement.
Enthone-OMI Inc.
New Haven, Conn.