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Reply To: | TechNet E-Mail Forum. |
Date: | Wed, 2 Apr 2003 11:23:18 +0200 |
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Hi Technet,
Intersting thread about board shop audits this is. I want to add some
comments and a question:
Personally I think that besides a quality system (which must be visible
as procedures, worker instruction and inspections) what matters most is:
do they know their process. It's nice if the boardshop has perfect
control over a parameter X, but what if their target setting is plain
wrong. Like the boardshop I visited that had the HASL-airknives adjusted
for maximum flatness, resulting in less than 1 micron of leadtin on the
pads. It was controlled, it was documented, and the operator knew his
instructions, but 1 micron is just not thick enough for good
solderability....
My question: Can anyone tell me what are the most critical parameters
to investigate when auditing an ENIG process, or do you know a good
source of information about the specifics of this process ?
Daan Terstegge
Thales Communications
Unclassified mail
Personal Website: http://www.smtinfo.net
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