Transcription of IPC-TM-650 TEST METHODS MANUAL
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IPC-TM-650 TEST METHODS MANUAL
1 ScopeThis test measures changes in resistance ofplated-through hole barrels and internal layer connections asholes are subjected to thermal cycling. Thermal cycling is pro-duced by the application of a current through a specific cou-pon this technique, the test coupon is resistance heated bypassing DC current through the internal layer connection tothe barrel for three minutes to bring the temperature of thecopper to a designated temperature. Switching the current onand off creates thermal cycles between room temperatureand the designated temperature within the sample. This ther-mal cycling induces cyclic fatigue strain in the plated-throughhole barrels and internal layer interconnects and acceleratesany latent number of cycles achieved permits a quantitative assess-ment of the performance of the entire information regarding the test is found in Section Applicable DocumentsIPC-TM-650 Test METHODS - Semi or Automatic Technique3 Test SpecimensA typical daisy chain test coupon isshown in Figure IST CouponCertain design rules must be applied toachieve thermal uniformity.
5.3 Microsection Evaluation - Optional If detailed failure analysis is desired to determine exact location of separations and/or cracks, then a …
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