CAPACITOR ARRAY SCREENING METHOD

摘要

Provided is a capacitor array screening method with which it is possible to screen capacitor arrays that include a plurality of capacitor elements having different equivalent series resistances. This screening method involves: a contact step of bringing a pair of measurement terminals (60, 61) into contact with external electrodes (23, 33) provided on one side surface (12) of a capacitor array (10) and external electrodes (24, 34) provided on another side surface (13) thereof; a connection step of connecting the capacitor array (10) in parallel to a capacitor (70); a measurement step of applying an alternating-current signal between the pair of measurement terminals (60, 61) and measuring the impedance at the resonant frequency of the capacitor array (10), which is connected in parallel to the capacitor (70), and the impedance at the anti-resonant frequency thereof; and a screening step of determining that the capacitor array (10) is non-defective if the impedance at the resonant frequency is lower than or equal to a first threshold and the impedance at the anti-resonant frequency is lower than or equal to a second threshold.