We are users of the Alphalevel process.  An electroless silver coating 
with a co-deposited organic protective layer.  This is produced by Alpha 
Metals and is a very cost effective alternative to electroless nickel and 
gold for a flat surface mount finish.

We have chosen this in preference to a pure organic coating.  It looks 
like a solder finish and is more acceptable to our customers, who are 
unsure of the solderability of a copper finish.

We apply this after solder mask and is a direct replacement for our HASL 
process.

Richard Wood-Roe
Artetch Circuits Ltd.
Littlehampton,  UK


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This is mostly addressed to PCB fabricators, but anyone else with 
relevant info please e-mail back to me.  One of our new customers has a 
requirement for SILVER PLATING OVER COPPER and then covered with solder
mask similiar to SMOBC (SMOBC/S ?).  Do any of the shops out there in the 
technet world do this?


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