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| From: | |
| Reply To: | (Combined Forum of D-33a and 7-31a Subcommittees) |
| Date: | Mon, 4 Feb 2008 14:52:57 -0600 |
| Content-Type: | text/plain |
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Colleagues,
Our IPC-6012B specification provides for bare copper as a final finish
in Table 3-2, Final Finish, Surface Plating and Coating Thickness
Requirements.
The task group is evaluating whether or not this should be removed from
Table 3-2 in the future IPC-6012 Revision C. Among the concerns with
bare copper are instances of single-sided via protection that provides
for entrapment of chemistries that attack the bare copper in the hole
wall.
If there are those of you out there who use bare copper as a surface
finish, could you provide feedback to IPC as to how it is used in your
applications?
Thanks in advance,
John Perry
Technical Project Manager
IPC
3000 Lakeside Drive # 309S
Bannockburn, IL 60015
[log in to unmask]
1-847-597-2818 (P)
1-847-615-7105 (F)
1-847-615-7100 (Main)
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