Accession Number : ADA140157

Title :   Leakage Currents in Degraded Multi-Layer Ceramic Capacitors.

Descriptive Note : Technical rept.,

Corporate Author : VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG

Personal Author(s) : Burton,L C

PDF Url : ADA140157

Report Date : 26 Mar 1984

Pagination or Media Count : 8

Abstract : Leakage currents in new and degraded X7R type multi-layer ceramic capacitors show both ohmic and space charge limited behavior. The near-3/2 power voltage characteristic (I proportional to V to the 3/2 power) of new devices can be attributed to electron emission from electrode points. The quadratic behavior (I proportional to V squared) for moderately degraded devices represents space charge limited emission from planar electrodes. This emission may evolve from the point emission due to resistivity decreases that occur in the emission region as a result of ion movement. For these currents, electrons are believed to be the dominant charge carriers. Neither Schottky nor Poole-Frenkel currents were identified.

Descriptors :   *Ceramic capacitors, *Electrodes, *Charge carriers, Electric current, Space charge, Mobility, Electron emission, Dielectrics, Electrical resistance, Layers, Planar structures, Behavior, Limitations, Transport properties, Drift, Currents, Quadratic equations, Emission, Electrons

Subject Categories : Electrical and Electronic Equipment
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE