FIELD: physics.
SUBSTANCE: method consists of pre-determining the light-current characteristics of the measurement object - a semiconductor diode, passing sequence of pulses of the heating current through the diode with a constant repetition period and a varying amplitude, providing a harmonic law of modulation of the heating power, measuring in the pauses between pulses of the forward voltage of the diode with a small measuring current and determining the change in p-n transition temperature, calculated by means of the Fourier transform of the amplitude and phase of the primary harmonic transition temperature variable component, and determining the modulus and phase of the thermal impedance of the semiconductor diode.
EFFECT: providing the possibility of increasing the accuracy of measuring thermal resistance.
1 dwg
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