Gunn Diodes (epo) Patents (Class 257/E47.004)
  • Patent number: 8803124
    Abstract: An embodiment of the present invention sets forth an embedded resistive memory cell that includes a first stack of deposited layers, a second stack of deposited layers, a first electrode disposed under a first portion of the first stack, and a second electrode disposed under a second portion of the first stack and extending from under the second portion of the first stack to under the second stack. The second electrode is disposed proximate to the first electrode within the embedded resistive memory cell. The first stack of deposited layers includes a dielectric layer, a high-k dielectric layer disposed above the dielectric layer, and a metal layer disposed above the high-k dielectric layer. The second stack of deposited layers includes a high-k dielectric layer formed simultaneously with the high-k dielectric layer included in the first stack, and a metal layer disposed above the high-k dielectric layer.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: August 12, 2014
    Assignee: Intermolecular, Inc.
    Inventors: Dipankar Pramanik, Tony P. Chiang, David Lazovsky
  • Publication number: 20100163837
    Abstract: A Gunn diode includes an active layer having a top and a bottom, a first contact layer disposed adjacent to the top of the active layer, a second contact layer disposed adjacent to the bottom of the active layer, wherein the first and second contact layers are more heavily doped than the active layer, and at least one outer contact layer disposed at an outer region of at least one of the first and second contact layers, the at least one outer contact layer being more heavily doped than the first and second contact layers, wherein the first and second contact layers, the active layer, and the at least one outer contact layer include a base material that is the same.
    Type: Application
    Filed: January 31, 2008
    Publication date: July 1, 2010
    Applicant: Technische Universitaet Darmstadt
    Inventors: Oktay Yilmazoglu, Kabula Mutamba, Dimitris Pavlidis, Tamer Karduman
  • Publication number: 20100084627
    Abstract: A device includes: a first electrical contact; a second electrical contact; a semiconducting or semimetallic organic layer disposed at least partially between the first and second electrical contacts; and a tunneling barrier layer disposed at least partially between the semiconducting or semimetallic organic layer and the first electrical contact. The tunneling barrier layer has a thickness effective to enable flow of an electrical current through the tunneling barrier layer responsive to an operative electrical bias applied across the first and second electrical contacts, the electrical current exhibiting negative differential resistance for at least some applied electrical bias values. Circuits are also disclosed that utilize one or more negative differential resistance polymer diodes to implement logic, memory, or mixed signal applications.
    Type: Application
    Filed: November 3, 2006
    Publication date: April 8, 2010
    Inventors: Paul R. Berger, Woo-Jun Yoon
  • Publication number: 20090206319
    Abstract: A semiconductor device which displays an oscillating voltage due to the creation of charge domains which includes a plurality of semiconductor layers and at least two electrodes spaced from one another in the direction of the layers, an upper of which has a composition and/or dimensions predetermined so that a charge therein balances a depletion from a surface charge of the upper layer on application of a potential difference across said electrodes. The electrodes may be in contact solely with the upper layer. A method of manufacturing the device is also provided.
    Type: Application
    Filed: April 30, 2007
    Publication date: August 20, 2009
    Applicants: ABERDEEN UNIVERSITY - RESEARCH AND INNOVATION, UNIVERSITY COURT OF THE UNIVERSITY OF GLASGOW
    Inventors: Neil John Pilgrim, Geoffrey Martin Dunn, Ata-Ul-Hebib Kahlid, Colin Roy Stanley, Iain Granger Thayne, David Robert Sime Cumming