IPC-TM-650 TEST METHODS MANUAL
1 Scope This test measures changes in resistance of plated-through hole barrels and internal layer connections as holes are subjected to thermal cycling. Thermal cycling is pro-duced by the application of a current through a specific cou-
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www.ipc.org1.0 Scope 1.1 Summary This method is for measurement of relative permittivity (ε r) and dissipation factor or loss tangent (tan δ)of circuit board substrates under stripline conditions. Measure-ments are made by measuring resonances of a length of strip-
IPC-TM-650 TEST METHODS MANUAL
www.ipc.org5.2.6.3 Standard 3: (0.2 ppm lithium, 2.0 ppm sodium, ammonium, potassium, magnesium, and calcium) Pipet 1 ml of the combination stock standard solution to a 25 ml volu-metric flask and dilute to volume with 10% 2-propanol / 90%