Patents by Inventor Richard Traczewski

Richard Traczewski 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).

  • Metalorganic vapor phase epitaxial growth of group II-VI semiconductor materials
    Patent number: 4568397
    Abstract: A method for growing a Group II-VI epitaxial layer on a substrate, said epitaxial layer having an electron mobility greater than 1.5.times.10.sup.5 cm.sup.2 /V-sec at 77.degree. K. and a carrier concentration less than 4.times.10.sup.15 (cm.sup.-3) is described. The method includes the steps of directing a plurality of vapor flows towards the substrate including a Group II metalorganic vapor having a mole fraction in the range of 3.0.times.10.sup.-4 to 4.5.times.10.sup.-4, a Group VI metalorganic vapor having a mole fraction in the range of 2.9.times.10.sup.-3 to 3.5.times.10.sup.-3 and a Group II elemental metal vapor having a mole fraction in the range of 2.6.times.10.sup.-2 to 3.2.times.10.sup.-2. The source of Group II metal is heated to at least 240.degree. C. while radiant energy is directed toward the reactor vessel to warm the zone of the reactor vessel between the Group II metal source and the substrate to at least 240.degree. C.
    Type: Grant
    Filed: September 12, 1984
    Date of Patent: February 4, 1986
    Assignee: Raytheon Company
    Inventors: William E. Hoke, Richard Traczewski, Peter J. Lemonias