Patents by Inventor Saroja Ramamurthi

Saroja Ramamurthi 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: 5944975
    Abstract: A method of fabricating an emitter plate 12 for use in a field emission device comprising the steps of providing an insulating substrate 18 and forming a first conductive layer 13 on the insulating substrate 18. This is followed by the steps of forming an insulating layer 20 on the first conductive layer 13 and forming a second conductive layer 22 on the insulating layer 20. Then, a plurality of apertures 34 are formed through the second conductive layer 22 and through the insulating layer 20. A lift-off layer 36 is then formed on the second conductive layer 22. The lift-off layer 36 is formed by a plating process wherein the plating bath has a pH between 2.25 and 4.5, and current densities of 1 to 2O mA/cm.sup.2. The method may further comprise depositing conductive material through the plurality of apertures 34 to form a microtip 14 in each of the plurality of apertures 34. The excess deposited conductive material 14' and the lift-off layer 36 are then removed from the second conductive layer 22.
    Type: Grant
    Filed: January 24, 1997
    Date of Patent: August 31, 1999
    Assignee: Texas Instruments Incorporated
    Inventors: Arthur M. Wilson, Chi-Cheong Shen, Saroja Ramamurthi