IEEE Topical Meeting EPEPS 2002
Conference paper

Accuracy of dielectric constant measurement using the full-sheet-resonance technique IPC-TM-650

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The accuracy limitations of the full-sheet-resonance technique for extracting the dielectric constant of laminate materials used for printed-circuit-board wiring are presented over the frequency range 0.250 GHz to 2.2 GHz. It is shown that skin-effect and surface roughness introduce significant errors as materials become thinner than 10 mil (254 3m). These effects result in over-prediction of εr', and prevent determination of the εr'(f) variation.