IPC-TM-650 TEST METHODS MANUAL

IPC-TM-650 TEST METHODS MANUAL 1 Scope This test measures changes in resistance oflated-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 coupon configuration In this technique, the test coupon is resistance heated bpassing 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. [button]点击下载[/button]