Patents by Inventor James R. Mulcahy

James R. Mulcahy has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10266936
    Abstract: A method of making a piezoelectric device comprising providing a deposition chamber, the deposition chamber having reduced pressure therein; loading a substrate into the deposition chamber; sputter depositing hexagonal 001 oriented titanium on the substrate; providing an oxygen anneal to convert 001 oriented titanium into 100 oriented rutile TiO2; sputter depositing a 111 or 100 oriented textured conducting material for use as an electrode; sputter depositing a hexagonal 001 oriented titanium and providing an oxygen anneal in a lead oxide environment to convert 001 oriented titanium into 100 oriented rutile TiO2 or PbxTi1-xO3; sputter depositing textured lead zirconate titanate PbZrxTi1-xO3 having an 001 orientation as a piezoelectric layer, and sputter depositing a textured electrode on top of the textured lead zirconate titanate; whereby processing of the layers within the deposition chamber provides minimized exposure to ambient contamination and improved texturing in the resulting films.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: April 23, 2019
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Daniel M. Potrepka, James R. Mulcahy, Ronald G. Polcawich
  • Publication number: 20160254439
    Abstract: A method of making a piezoelectric device comprising providing a deposition chamber, the deposition chamber having reduced pressure therein; loading a substrate into the deposition chamber; sputter depositing hexagonal 001 oriented titanium on the substrate; providing an oxygen anneal to convert 001 oriented titanium into 100 oriented rutile TiO2; sputter depositing a 111 or 100 oriented textured conducting material for use as an electrode; sputter depositing a hexagonal 001 oriented titanium and providing an oxygen anneal in a lead oxide environment to convert 001 oriented titanium into 100 oriented rutile TiO2 or PbxTi1-xO3; sputter depositing textured lead zirconate titanate PbZrxTi1-x03 having an 001 orientation as a piezoelectric layer, and sputter depositing a textured electrode on top of the textured lead zirconate titanate; whereby processing of the layers within the deposition chamber provides minimized exposure to ambient contamination and improved texturing in the resulting films.
    Type: Application
    Filed: March 4, 2016
    Publication date: September 1, 2016
    Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I
    Inventors: Daniel M. Potrepka, James R. Mulcahy, Ronald G. Polcawich
  • Publication number: 20080244241
    Abstract: A computing system capable of handling floating point operations during program code conversion is described, comprising a processor including a floating point unit and an integer unit. The computing system further comprises a translator unit arranged to receive subject code instructions including at least one instruction relating to a floating point operation and in response to generate corresponding target code for execution on said processor. To handle floating point operations a floating point status unit and a floating point control unit are provided within the translator. These units are cause the translator unit to generate either: target code for performing the floating point operations directly on the floating point unit; or target code for performing the floating point operations indirectly, for example using a combination of the integer unit and the floating point unit. In this way the efficiency of the computing system is improved.
    Type: Application
    Filed: February 28, 2008
    Publication date: October 2, 2008
    Applicant: Transitive Limited
    Inventors: Gavin Barraclough, James R. Mulcahy, David J. Rigby