In a heating and temperature control system for a data storage apparatus comprising at least one matrix-addressable ferroelectric or electret memory device, Joule heating means are provided in the memory device, a temperature determining means is connected with controller circuitry and the controller...http://www.google.se/patents/US7248524?utm_source=gb-gplus-sharePatent US7248524 - Operating temperature optimization in a ferroelectric or electret memory
