Sure it's covered, under "must meet customer requirements" Read 3.6.2.11,
notice also it says plating/coating thickness and the reference to copper
thickness (post final finish?) in relation to testing of the final, finished
product, does not consider copper thickness and final finish the same.
Yes, I would agree there are instances where a bare copper product would be
provided, but as stated earlier these would be exceptions (I assume).
I believe we need to separate Code C in Table 3-2 and state this is not
final finish criteria unless specified by the customer.
Franklin
-----Original Message-----
From: IPC-600-6012 [mailto:[log in to unmask]] On Behalf Of Thomas F
Gardeski
Sent: Monday, February 04, 2008 3:53 PM
To: [log in to unmask]
Subject: Re: [IPC-600-6012] Bare Copper as a Surface Finish
Bare cooper is only supplied as an intermediate for further processing down
the line. I don't think we have to cover it in 6012B.
Thomas F. Gardeski
Global Technical Service Manager
DuPont High Performance Films
480 831 0975 AZ / 740 474 0269 OH
[log in to unmask]
John Perry
<[log in to unmask]
G> To
Sent by: [log in to unmask]
IPC-600-6012 cc
<IPC-600-6012@ipc
.org> Subject
[IPC-600-6012] Bare Copper as a
Surface Finish
02/04/2008 01:52
PM
Please respond to
"(Combined Forum
of D-33a and
7-31a
Subcommittees)"
<IPC-600-6012@IPC
.ORG>
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
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