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May 2007

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Subject:
From:
Steve Smith <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Steve Smith <[log in to unmask]>
Date:
Wed, 23 May 2007 15:32:20 -0400
Content-Type:
text/plain
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text/plain (82 lines)
Here is a note I use on our surface mount boards:

BOW AND TWIST SHALL NOT EXCEED 0.75% (.0075" PER INCH) IN ACCORDANCE
WITH IPC-A-600 FOR SURFACE MOUNTED BOARDS WHEN MEASURED USING
IPC-TM-650, METHOD 2.4.22


Regards, 
Steve Smith 
Product Engineer 
Staco Energy Products Co. 
Web Site: www.stacoenergy.com 
& www.stacopower.com

DISCLAIMER AND/OR CONFIDENTIALITY NOTICE: 
This message, including any attached materials, is intended solely for
the use of the individual or entity to whom it is addressed and may
contain information that is privileged, confidential, and exempt from
disclosure under applicable law. If the reader of this electronic mail
transmission is not the intended recipient, you are hereby notified that
any dissemination, distribution, or copying of this communication is
strictly prohibited. If you have received this communication in error,
please e-mail or call Staco Energy Products Co. at (937) 253-1191. Thank
you for your cooperation.



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Tim Mack
Sent: Wednesday, May 23, 2007 3:18 PM
To: [log in to unmask]
Subject: [TN] PCB Flatness

Does anybody know how "flatness" is measured as it relates to circuit
board fabrication? I was told that the boards I am ordering would have a
flatness of less than 0.5%.  0.5% of what? Any help would be
appreciated.

 

Thanks, 

 

North Dakota State University

Center for Nanoscale Science and Engineering 

Tim Mack

www.ndsu.nodak.edu/cnse

Research Engineer

 

 


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