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Tue, 9 Oct 2001 11:17:04 -0400 |
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Moonman - when I worked for Celestica (Toronto) we only allowed 2 for any surface finish. I worked both HASL and OSP. I believe there was more concern with pads lifting than intermetallic layer. Besides - if you have to replace a part 3 times you have some serious issues to work.
regards
Graham Collins
Process Engineer,
Northrop Grumman
Atlantic Facility of Litton Systems Canada
(902) 873-2000 ext 6215
>>> [log in to unmask] 10/08/01 03:53PM >>>
For fine pitch and BGA, HP and Celestica used to allow two cycles for HASL
(ring a ding) and three for OSP and ENIG. Why is that?
MoonMan
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