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September 1997

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Subject:
Re: Bow and Twist
From:
Andy Cameron <[log in to unmask]>
Reply To:
TechNet Mail Forum.
Date:
Mon, 22 Sep 1997 18:47:59 -0400
Content-Type:
text/plain
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text/plain (18 lines) 
The design of the part; ie, adding copper theiving if possible, and a
balanced (symetrical build) will help with bow and twist, as well as copper
distribution during PCB manufacturing.  This will be thermally more
consistent during wave or reflow. That is the useful issue.  The spec.issue
is another concern.  Typical Bow and twist is .7%..

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