IPC-TM-650 TEST METHODS MANUAL

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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-650Test 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.

IPC-TM-650 TEST METHODS MANUAL Number 2.6.26 Subject DC Current Induced Thermal Cycling Test Date 05/01 Revision Originating Task Group Test Methods Subcommittee (7-11) Material in this Test Methods Manual was voluntarily established by Technical Committees of IPC. This material is advisory only ... IPC-TM-650 Number 2.6.26 Subject DC Current ...

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