The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 1992
Filed:
Jan. 22, 1991
Noriaki Tsukaka, Stuttgart, DE;
Klaus Ploog, Stuttgart, DE;
Max Planck Gesellschaft zur Foerderung der Wissenschaften e.V., Goettingen, DE;
Abstract
An electron-wave coupled semiconductor device, in particular a semiconductor switching device, comprises a first layer of semiconducting material having a first bandgap, and a second layer of material formed on said first semiconducting layer and having a second bandgap greater than the first said bandgap. First and second electron waveguides are formed alongside but spaced apart from each other in the first semiconductor layer adjacent the boundary between this layer and said second layer. A gate region extends over said second layer transverse to and over said electron waveguides. First contact means provides input connections to said first and second electron waveguides on one side of said gate region and further contact means provides separate output connections from said first and second electron waveguides on the opposite side of the gate region from said first contact means. The dimension of the electron waveguides under said gate region, both along and transverse to said electron waveguides, and also the dimension between said electron waveguides are smaller than the elastic mean free path for electrons at the operating temperature of the device. A signal applied to the gate region can be used to switch a signal applied to said input contact means selectively to a selected one of the output connections.