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Subject:	Re: Bow and Twist Measrement
From:	Grunde Gjertsen <[log in to unmask]>
Reply To:	TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:	Fri, 12 Sep 2008 13:47:36 +0200
Content-Type:	text/plain
Parts/Attachments:	text/plain (73 lines)

Hi

0,75% but 0,5% is better if the design allows for it, especially on large 
boards.

Best regards
Grunde





Paymon Sani <[log in to unmask]> 
Sent by: TechNet <[log in to unmask]>
05.09.2008 19:54
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to
Paymon Sani <[log in to unmask]>


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Subject
[TN] Bow and Twist Measrement






Hello All,

 

IPC-A-610 Rev. D, Section 10.2.7 allows 1.5% and 0.75% Bow and Twist for
Through-hole and surface mount assemblies accordingly. What percentage
should I be applying if the assembly has mixture of surface mount and
through-hole components?

 

Thank you in advance,

Paymon Sani


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