Patents by Inventor Henry Bleichner

Henry Bleichner 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).

  • Bipolar semiconductor device having semiconductor layers of SiC and a method for producing a semiconductor device of SiC
    Patent number: 5831287
    Abstract: A bipolar semiconductor comprising layers of SiC semiconductor material. At least one pn-junction is formed between two of the layers having charged carrier transport across the junction when the device is in a conductive state. A resistive element in series with the pn-junction lowers the current through the pn-junction as the voltage drop across the device increases with an increase in temperature. The temperature coefficient for the device switches from a negative to a positive at a lower current through the device.
    Type: Grant
    Filed: September 4, 1996
    Date of Patent: November 3, 1998
    Assignee: ABB Research, Ltd.
    Inventors: Mietek Bakowski, Ulf Gustafsson, Henry Bleichner