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25 SEP 96 07:43:49 EDT |
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Tin-lead plating thickness |
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from simon.ipc.org by vnet.IBM.COM (IBM VM SMTP V2R3) with TCP;
Wed, 25 Sep 96 09:03:14 EDT
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Does anybody know what is the tin-lead HASL plating thickness requirements
for printed circuit boards? Do you have any standards which specified it?
IPC-A-600D specified only the minimum plating thickness, which is 0.005mm
or 0.0002" for our application.
We are having a problem with the circuit board which plating thickens is
greater than the other ones. Also, the plating surface is not flat.
This is not the fine pitch components board. But, when pads are so
"bumpy" and plating is thicker than other boards, the adhesive dots
application becomes difficult. Glue dispenser shall be adjusted for the
proper adhesive dots size.
It would be greatly appreciated if anyone could give me any directions.
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