Patents by Inventor David J. Leandri

David J. Leandri 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).

  • Low dielectric, low temperature fired glass ceramics
    Patent number: 5258335
    Abstract: A low dielectric, low temperature fired glass ceramic produced by firing at about 800.degree.-900.degree. C. a mixture comprising at least one glass consisting of, by weight percent, 0 to 50% B.sub.2 O.sub.3, 35 to 65% CaO, and 10 to 65% SiO.sub.2, and selected from the glasses of CaO-B.sub.2 O.sub.3 -SiO.sub.2 glass system. The glass ceramic is light weight, exhibits a dielectric constant of less than about 7.9, has adequate mechanical strength and thermal conductivity, and is compatible with precious metal conductors. The glass ceramic is useful in the manufacture of integrated circuits and any other electronic or mechanical components where a glass ceramic exhibiting this particular combination of characteristics is suitable.
    Type: Grant
    Filed: February 19, 1992
    Date of Patent: November 2, 1993
    Assignee: Ferro Corporation
    Inventors: S. K. Muralidhar, Gordon J. Roberts, Aziz S. Shaikh, David J. Leandri, Dana L. Hankey, Thomas J. Vlach
  • Low dielectric, low temperature fired glass ceramics
    Patent number: 5164342
    Abstract: A low dielectric, low temperature fired glass ceramic produced by firing at about 800.degree.-950.degree. C. a mixture comprising at least one glass consisting of, by weight percent, 0 to 50% B.sub.2 O.sub.3, 35 to 65% CaO, and 10 to 65% SiO.sub.2 l , and selected from the glasses of CaO-B.sub.2 O.sub.3 -SiO.sub.2 glass system. The glass ceramic is light weight, exhibits a dielectric constant of less than about 5.2, has adequate mechanical strength and thermal conductivity, and is compatible with precious metal conductors. The glass ceramic is useful in the manufacture of integrated circuits and any other electronic or mechanical components where a glass ceramic exhibiting this particular combination of characteristics is suitable.
    Type: Grant
    Filed: October 24, 1990
    Date of Patent: November 17, 1992
    Assignee: Ferro Corporation
    Inventors: S. K. Muralidhar, Aziz S. Shaikh, Gordon J. Roberts, Dana L. Hankey, David J. Leandri, Thomas J. Vlach