Patents by Inventor Alwin Earl Michel

Alwin Earl Michel 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).

  • Process for producing integrated circuit devices by ion implantation
    Patent number: 4118250
    Abstract: In this process of producing a bipolar transistor, all the regions of the device except the emitter region are formed by ion implantation through an inorganic dielectric layer of uniform thickness. Subsequently, all the contact openings to the emitter, base and collector are formed and the emitter is implanted through the emitter contact opening. This unique combination of process steps permits the use of a surface insulating dielectric layer of uniform thickness, wherein all capacitances are uniform and controllable while still permitting direct implantation of the emitter, which, because of its shallow depth is difficult to implant through an oxide.
    Type: Grant
    Filed: December 30, 1977
    Date of Patent: October 3, 1978
    Assignee: International Business Machines Corporation
    Inventors: Cheng Tzong Horng, Alwin Earl Michel, Hans Stephan Rupprecht, Robert Otto Schwenker