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Reply To: | (Combined Forum of D-33a and 7-31a Subcommittees) |
Date: | Wed, 25 Aug 2010 14:50:43 -0400 |
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Hi,
I mean .0002".
Thanks
Sincerely,
Paul Reid
Program Coordinator
PWB Interconnect Solutions Inc.
235 Stafford Rd., West, Unit 103
Nepean, Ontario
Canada, K2H 9C1
613 596 4244 ext. 229
Skype paul_reid_pwb
[log in to unmask] <mailto:[log in to unmask]>
-----Original Message-----
From: IPC-600-6012 [mailto:[log in to unmask]] On Behalf Of Bill
Ortloff
Sent: August 25, 2010 1:13 PM
To: [log in to unmask]
Subject: Re: [IPC-600-6012] wrap and electroless
Paul,
do you mean .0002? Two (.002) mils would be excessive for wrap.
William A. Ortloff
Engineering Fellow
Advanced Manufacturing Technologies
Space and Airborne Systems
Raytheon Company
310.607.7333 office
310.616.1873 fax
520.245.4436 cell
[log in to unmask]
From:
Paul Reid <[log in to unmask]>
To:
[log in to unmask]
Date:
08/25/2010 09:40 AM
Subject:
Re: [IPC-600-6012] wrap and electroless
Sent by:
IPC-600-6012 <[log in to unmask]>
I have to agree with Roberto, electroless should not count in the
thickness measurement of wrap. There are times when there are double
electroless copper layers. Some times we see double electroless copper
with exotic PWB constructions. I think one of the larger electroless
copper suppliers suggests double processing on a high build electroless.
That means electroless could be up to 50% of the minimum thickness
requirement.
It is my subjective opinion that the electroless copper does not
directly add to the robustness of the wrap (unless of course it is
missing). Two mils of electrolytic copper has been demonstrated to be
robust in reliability testing. Less then .002" is usually a reliability
liability.
Best regards,
Paul Reid
Program Coordinator
PWB Interconnect Solutions Inc.
235 Stafford Rd., West, Unit 103
Nepean, Ontario
Canada, K2H 9C1
613 596 4244 ext. 229
Skype paul_reid_pwb
[log in to unmask] <mailto:[log in to unmask]>
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