Forum: SMT Production & Design
Thread: solderability and hasl thickness
Date: September 09, 2003 06:07 PM
Author: davef
Subject: solderability and hasl thickness
We would be very wary of allowing 50 uinches, because this will likely result in reduced shelf life due to intermetallic growth. As a guesstimate, at least 10 uinches of that 50 uinches, and maybe more, is already intermetallic when you receive the boards from your fabricator. So, that leaves you less than 40 uinches as solderablity protection to protect the pads during the storage life of the board.
(http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=25682)