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May 2018

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Subject:
Re: Bow and Twist measurements per IPC 650 TM 2.4.22, IPC 600-2.11 Flatness
From:
Jose A Rios <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Jose A Rios <[log in to unmask]>
Date:
Wed, 16 May 2018 13:34:37 +0000
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2.4.22 is only for bare (unpopulated) PWB’s, and the rigid portion of rigid-flex PWB's. Section 1 (Scope) explicitly excludes PCBA’s from being evaluated using this method.





José (Joey) Ríos, Sr QA Engineer

Mission Assurance Manager

Kavli Institute for Astrophysics & Space Research

Massachusetts Institute of Technology

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(617)324-6272









On May 16, 2018, at 7:17 AM, [log in to unmask]<mailto:[log in to unmask]> wrote:



Fellow TechNetters:



  Is there a separate Bow & Twist Test/documentation for Printed Wire Boards, PWB, and Printed Wire Board Assemblies, PWBAs?   Are they interchangeable......



Victor,

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