Hello Technetters,



We are currently evaluating some electrical assemblies and I would appreciate your advice as IPC experts.



In IPC 610G/H, Section 10.4.1 Flexible and Rigid-Flex Printed Circuitry - Damage, the bullet "Evidence of burns, charring or melting of the insulation"  is defined as a "Defect Class 1,2,3"



My question is related to the applicability of this section: does this apply to burns, charring or melting that would have occurred ONLY during the electrical assembly process (installing electrical parts on the PCB)? To be more exact: if charring of the PCB is present at the raw PCB level (before the electronic assembly process) would that mean that at the final electrical assembly stage this criteria is not applicable - in other words PCB charring is acceptable as long as it occurred during PCB fabrication and not during installing of electrical parts on the PCB?





Thank you for your help,

Chris Dacey, P. Eng

Senior Electrical Engineer

WESCAM, INC.

SUBSIDIARY OF L3HARRIS TECHNOLOGIES, INC.

L3Harris.com / [log in to unmask]<mailto:[log in to unmask]>

649 North Service Road West, Burlington, ON L7P 5B9 Canada









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