If you want to evaluate lead free HASL I suggest you specify SnCu+ni or SAC.
If flatness is critical specify Horizontal leveling. If you looking to add a
thickness spec. Ask for double the minimum and half the maximum you would
normally spec for SnPb HASL.
 We would be happy to process small quantities FOC for you.

-----Original Message-----
From: Kane, Joseph E [mailto:[log in to unmask]]
Sent: Thursday, July 01, 2004 10:04 PM
To: [log in to unmask]
Subject: [TN] Specifying PWB Finishes


We're preparing to order some test boards with alternative finishes for
lead-free testing, including immersion tin and OSP over bare copper.  Can
anyone suggest how we might specify these board finishes in a drawing note?
Our existing drawings pretty much specify only the material and the
thickness, something like "immersion gold, xxx thick, over electroless
nickel, xxx thick."

Joe Kane
BAE SYSTEMS Controls
Johnson City, NY

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