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May 2007

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Subject:
Re: PCB Flatness
From:
Ian Hanna <[log in to unmask]>
Reply To:
[log in to unmask]
Date:
Wed, 23 May 2007 15:37:57 -0400
Content-Type:
text/plain
Parts/Attachments:
text/plain (68 lines) 
http://www.ipc.org/4.0_Knowledge/4.1_Standards/test/2.4.22c.pdf

x% of the diagonal of the work-piece...





-----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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