I have been reading this thread with interest as I have a been asking this
question recently about some PCBs we have outsourced which are not as good
as our normal levelling.
Reading all of the e-mails and links I came to the conclusion that between
10 and 25 microns seems reasonable so the suggestion of 2.5 mils seems high
(if my conversions are right and 2.5mils is around 63.5 microns, back to the
old metric 'v' imperial argument!?!?!).
Does anyone out there quote a flatness spec for their HAL and if so, what do
you quote?
Neil
-----Original Message-----
From: Larry Tawyea [mailto:[log in to unmask]]
Sent: 19 October 2001 20:37
Subject: Re: HASL Plating Thickness
In a message dated 10/18/01 5:18:09 AM Central Daylight Time,
[log in to unmask] writes:
Christopher,
A thickness of 3.5 mils seems a little high but in my experience 2.5 mils
would not be out of the question.
Larry Tawyea
Hello All,
Is there any specification regarding the max thickness of HASL plated
PCB's. We have recently received a lot of boards where the HASL plating on
the fine pitch device exceeds 3.5 mils. He have an extensive amount of
bridging on these devices now. Any help would be greatly appreciated.
Thanks
Christopher Lampron
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