NASA Bulletin Flags Chip Resistor Body Cracking in Printed Circuit Board Assemblies

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NASA has issued a technical bulletin on cracking in chip resistor bodies found in printed circuit board assemblies. Chip resistors are widely used across the agency's projects, but alumina substrate cracking during environmental testing has been uncommon. Two cases of thick-film chip resistor cracking were recorded during thermal cycling performed after vibration testing. The fractures ran across the short axis of the components. The bulletin was published by NASA's Langley Research Center, which has provided a contact for further information.

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