Patents by Inventor Walter Henricus Maria Magdala Smulders

Walter Henricus Maria Magdala Smulders 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).

  • Semiconductor device, method of manufacturing same and circuit arrangement comprising the device
    Patent number: 3977020
    Abstract: A semiconductor device having a transistor, in particular a power transistor, of the planar type which comprises a distributed base-series resistor for safety against second breakdown. According to the invention the base resistor is formed in that a resistance-increasing region which is present beyond the emitter zone and substantially entirely surrounds the inner contact surface is present in the base zone between the contact surfaces of the emitter and base electrode layers surrounding each other along substantially the whole edge of the emitter-base junction.
    Type: Grant
    Filed: August 29, 1974
    Date of Patent: August 24, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Theodoor Henri Enzlin, Walter Henricus Maria Magdala Smulders
  • Parellel-connection of semiconductor systems with an arrangement for preventing thermal instability
    Patent number: 3952258
    Abstract: The invention describes how semiconductor configurations can be connected in parallel so as to prevent thermal instability. For this purpose each output transistor has the strongest thermal coupling with a driver transistor other than that to which it is electrically coupled, preferably that electrical coupling which is thermally weakest.
    Type: Grant
    Filed: April 11, 1975
    Date of Patent: April 20, 1976
    Assignee: U.S. Philips Corporation
    Inventor: Walter Henricus Maria Magdala Smulders