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 
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-----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
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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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