>Alternatives to HASL are:   An addendum
>
>A.. Metal coatings
>
>1. Immersion Gold over the electroless nickel (Aurotech, Ronamerse SMT)
>2. Immersion Silver (Alpha Level)
>3. Electroless Palladium (Pallatect, Pallamerse SMT)
>4. Immersion tin (APT 884, Tinposit, Tinplate RT, Chemposit Sn)
5. Immersion Palladium (Paladin)
6. Electroless Gold over Nickel

A Note of explanation:  Immersion plating is always self limiting, and
usually very thin, Electroless plating can, in theory, plate as thick as
wanted, and is typically much thicker than  electroless.  For the fabricator,
immersion plating baths are generally infinitely easier to deal with than
electroless plating baths.

>B. Organic coatings (benzimidazole or imidazole based compounds,  often
>coupled with co-deposited copper)
>
>1. Shercoat (Atotech)
>2. Entek Plus (Enthone)
>3. Ronacoat (LeaRonal)
>4. MecSeal (Mec)
>5. M- Coat Plus (MacDermid)
>6. Glicoat - F1, E3 (Shikoku)
>
>Regards
>
>Michael Pavlov

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