Patents by Inventor Tobias WIKSTRÖM

Tobias WIKSTRÖM 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).

  • Publication number: 20140312959
    Abstract: An exemplary current switching device includes an integrated gate-commutated thyristor with an anode, a cathode, and a gate, wherein a current between the anode and the cathode is interruptible by applying a switch-off voltage to the gate; and a gate unit for generating the switch-off voltage. The gate unit and a connection of the gate unit to the gate establish a gate zcircuit having a stray impedance. The gate unit is adapted for generating a spiked switch-off voltage with a maximum above a breakdown voltage (VGRMAX) between the cathode and the gate, such that the switch-off voltage at the gate stays below the breakdown voltage (VGRMAX) due to the stray impedance of the gate circuit.
    Type: Application
    Filed: April 21, 2014
    Publication date: October 23, 2014
    Applicant: ABB Technology AG
    Inventor: Tobias WIKSTRÖM
  • Patent number: 8519433
    Abstract: The present disclosure provides a semiconductor switching device including a substrate having deposited thereon a cathode, an anode and a gate of the semiconductor switching device, and a connection means for electrically connecting the cathode in the gate of the semiconductor switching device to an external circuit unit. The connection includes a cathode-gate connection unit having a coaxial structure including a gate conductor and a cathode conductor for electrically connecting the cathode and the gate of the semiconductor switching device to the external circuit unit.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: August 27, 2013
    Assignee: ABB Research Ltd
    Inventors: Didier Cottet, Thomas Stiasny, Tobias Wikstroem
  • Publication number: 20100301384
    Abstract: A diode for fast switching applications includes a base layer of a first conductivity type with a first main side and a second main side opposite the first main side, an anode layer of a second conductivity type, which is arranged on the second main side, a plurality of first zones of the first conductivity type with a higher doping concentration than the base layer, and a plurality of second zones of the second conductivity type. The first and second zones are arranged alternately on the first main side. A cathode electrode is arranged on top of the first and second zones on the side of the zones which lies opposite the base layer, and a anode electrode is arranged on top of the anode layer on the side of the anode layer which lies opposite the base layer. The base layer includes a first sublayer, which is formed by the second main sided part of the base layer, and a second sublayer, which is formed by the first main sided part of the base layer.
    Type: Application
    Filed: June 21, 2010
    Publication date: December 2, 2010
    Applicant: ABB TECHNOLOGY AG
    Inventors: Iulian NISTOR, Arnost Kopta, Tobias Wikstroem
  • Publication number: 20100270584
    Abstract: The present disclosure provides a semiconductor switching device including a substrate having deposited thereon a cathode, an anode and a gate of the semiconductor switching device, and a connection means for electrically connecting the cathode in the gate of the semiconductor switching device to an external circuit unit. The connection includes a cathode-gate connection unit having a coaxial structure including a gate conductor and a cathode conductor for electrically connecting the cathode and the gate of the semiconductor switching device to the external circuit unit.
    Type: Application
    Filed: June 10, 2010
    Publication date: October 28, 2010
    Applicant: ABB RESEARCH LTD
    Inventors: Didier Cottet, Thomas Stiasny, Tobias Wikstroem