Patents by Inventor Peter Wehr

Peter Wehr 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).

  • Power semiconductor structural element with four layers
    Patent number: 4951110
    Abstract: Semiconductor structural elements with four regions of alternating conductivity type have a stored charge characteristic which becomes apparent as so-called "tail" current upon switching off. The tail current can be reduced by means of an anode-side emitter region containing damaged regions generated by laser bombardment which extend through a pn-junction formed between the anode-side emitter region and a central region up into the central region.
    Type: Grant
    Filed: October 31, 1988
    Date of Patent: August 21, 1990
    Assignee: Siemens Aktiengesellschaft
    Inventors: Gerhard Miller, Jenoe Tihanyi, Peter Wehr