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PLZT capacitor and method to increase the dielectric constant

United States Patent

December 12, 2017
View the Complete Patent at the US Patent & Trademark Office
A ceramic-capacitor includes a first electrically-conductive-layer, a second electrically-conductive-layer arranged proximate to the first electrically-conductive-layer, and a dielectric-layer interposed between the first electrically-conductive-layer and the second electrically-conductive-layer. The dielectric-layer is formed of a lead-lanthanum-zirconium-titanate material (PLZT), wherein the PLZT is characterized by a dielectric-constant greater than 125, when measured at 25 degrees Celsius and zero Volts bias, and an excitation frequency of ten-thousand Hertz (10 kHz). A method for increasing a dielectric constant of the lead-lanthanum-zirconium-titanate material (PLZT) includes the steps of depositing PLZT to form a dielectric-layer of a ceramic-capacitor, and heating the ceramic-capacitor to a temperature not greater than C.
Taylor; Ralph S. (Noblesville, IN), Fairchild; Manuel Ray (Kokomo, IN), Balachjandran; Uthamalingam (Willowbrook, IL), Lee; Tae H. (Naperville, IL)
15/ 151,830
May 11, 2016
GOVERNMENT LICENSE RIGHTS STATEMENT This is an invention jointly developed by Argonne National Laboratory and Delphi Automotive System, LLC. The United States Government has rights in this invention pursuant to Contract No. DE-AC02-06CH11357 between the United States Government and UChicago Argonne, LLC representing Argonne National Laboratory and pursuant to Sub Contract No. 4F-31041 between the United States Government/Department of Energy (Argonne National Laboratory) and Delphi Automotive Systems, LLC.