Patent ID: 8441265
Filing Date: 2013-05-14
Classification: G01R,H01G

Abstract:
1. A method for screening a population of electrolytic capacitors comprising: separating said population of electrolytic capacitors into a first subpopulation of electrolytic capacitors and a second subpopulation of electrolytic capacitors; determining an average breakdown voltage of said first subpopulation of electrolytic capacitors applying a dc voltage of no less than said average breakdown voltage to the combination of each test capacitor of said second subpopulation of electrolytic capacitors and a series connected resistor; monitoring a voltage drop in a charge curve across said test capacitor until up to either said average breakdown voltage or until a predetermined time is reached; and sorting said test capacitors into at least two groups wherein in a first group of said groups said voltage drop is below a predetermined level and in a second group of said groups said voltage drop is above a predetermined level.