Transcription of IPC-TM-650 TEST METHODS MANUAL
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IPC-TM-650 TEST METHODS MANUAL
1 ScopeThis test method covers three procedures used todetermine the bow and twist percentage of individual rigidprinted boards, rigid portions of rigid-flex printed boards,and/or multiple printed panels. Measurements on non-rectangular samples pose a unique testing problem and maynecessitate careful evaluation of the requirements imposed bythe users of this test method. This test method does notdescribe the special considerations necessary when testingthe bow and twist of printed board assemblies ( , compo-nent placement & weight, edge supports & connectors, etc.).The first two procedures describe production (Go/No-Go) METHODS that generally characterize the bow and twist asbeing no more than a specific value.
1 Scope This test method covers three procedures used to determine the bow and twist percentage of individual rigid printed boards, rigid portions of rigid-flex printed boards,
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