Energy Density Modeling of PLZT Ceramic Capacitors

摘要

The high voltage capacitors used in implantable cardioverter defibrillators (ICDs) must have high energy density in order to minimize device size. One of the technologies being considered for this application is PLZT ceramic multi-layer capacitors. A model has been developed to calculate and optimize packaged capacitor energy density based on device, material, design and process capability inputs. Calculations show that energy density greater than 5 J/cc can be achieved but that breakdown field capability must be improved to produce practical designs.