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EEE Components, Microsectioning - Short Technical Notes, PASSIVES, PHYSICAL, MECHANICAL & ASSEMBLY, TESTING

Microsectioning inspection of assembled capacitors

  • Posted by Mari Carmen López
  • On May 9, 2020
  • 0

Cross- sectioned ceramic capacitors are metallographic prepared in ALTER TECHNOLOGY Materials & Processes Laboratory, recognized as a recommended facility for such activity by ESA authority (MEMO ESA-TECMSP-MO-013165).

Sample & Method

Ceramic capacitors assembled using different techniques have been submitted to the verification program defined by ECSS-Q-ST-70-38C Rev.1. Metallographic analysis allows us to check the status of such devices after performing environmental tests (Vibration & Thermal Cycling).

Remark of Microsectioning Inspection

Ceramic capacitors assembled using the soldering process I presented a good internal structure. No evidence of crack on the ceramic body nor delamination were observed. On the contrary, ceramic capacitors assembled using process II showed a crack on the active area of the device. According to ECSS-Q-ST-70-38C Rev.1 clause 14.10.k, this crack is identified as a verification failure.

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Mari Carmen López
Mari Carmen López

Head Of Materials and Processes Laboratory


Mari Carmen has a degree in Degree in Chemistry and a PhD. in Materials Science.


She is responsible for the Materials & Process Laboratory of Alter Technology. Her work is focused on investigating the effects of the environment on electrical components, materials, and processes. As the head of the laboratory, she also manages the studies conducted to evaluate the quality of a bare or assembled printed circuit board in relation to ECSS standards or according to the customer’s specifications.

Mari Carmen López
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TAGS: Capacitors Ceramic DPA EEE PARTS MICROSECTIONING EEE PARTS SOLDERABILITY EEE PARTS THERMAL CYCLING EEE PARTS VIBRATION TEST Microsectioning - Short Technical Notes

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