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Date: | Fri, 10 Jul 2009 15:23:36 -0500 |
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Thanks for sharing. I have a different Rev since there is no 5.2.4
section on my copy.
victor
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Genny Gibbard
Sent: Friday, July 10, 2009 3:20 PM
To: [log in to unmask]
Subject: Re: [TN] Maximum Allowable Bow & Twist for PWB-PCB
IPC-2221 5.2.4
...
Unless otherwise specified by master drawing, max bow and twist shall be
0.75% for boards that use surface mount components and 1.5% for all
other board technologies.
...
Values are measured as per IPC-TM-650 Method 2.4.22
Genny Gibbard, P. Eng
Manufacturing Engineer, Vecima
PTS dept. x.4229
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Victor Hernandez
Sent: July 10, 2009 2:15 PM
To: [log in to unmask]
Subject: [TN] Maximum Allowable Bow & Twist for PWB-PCB
What is the maximum allowable Bow & Twist value? Not able to locate in
IPC-2221, 2222, & 6012A
Victor,
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