Characterized By Doping Material (epo) Patents (Class 257/E33.017)
  • Patent number: 8592841
    Abstract: A nitride semiconductor device used chiefly as an LD and an LED element. In order to improve the output and to decrease Vf, the device is given either a three-layer structure in which a nitride semiconductor layer doped with n-type impurities serving as an n-type contact layer where an n-electrode is formed is sandwiched between undoped nitride semiconductor layers; or a superlattice structure of nitride. The n-type contact layer has a carrier concentration exceeding 3×1010 cm3, and the resistivity can be lowered below 8×10?3 ?cm.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: November 26, 2013
    Assignee: Nichia Corporation
    Inventors: Shuji Nakamura, Takashi Mukai, Koji Tanizawa, Tomotsugu Mitani, Hiroshi Marui
  • Publication number: 20130107901
    Abstract: A branched optical isolator includes, located over a substrate, at least two branches connected to a trunk at a junction location. At least one branch comprises an optical absorber material and at least one branch comprises an optical transmitter material. The optical isolator may be incorporated into an optical chip carrier such that: (1) an optical emitting portion of an optical chip integral to or attached to the optical chip carrier; and (2) a connection to the optical isolator, are butt connected with a gap less than 10 nanometers, and otherwise materials matched. The optical isolator provides for attenuated backscattered optical radiation into the optical chip.
    Type: Application
    Filed: October 30, 2012
    Publication date: May 2, 2013
    Applicant: University of Central Florida Research Foundation
    Inventor: University of Central Florida Research Foundation
  • Patent number: 8399878
    Abstract: Highly uniform silica nanoparticles can be formed into stable dispersions with a desirable small secondary particle size. The silica particles can be surface modified to form the dispersions. The silica nanoparticles can be doped to change the particle properties and/or to provide dopant for subsequent transfer to other materials. The dispersions can be printed as an ink for appropriate applications. The dispersions can be used to selectively dope semiconductor materials such as for the formation of photovoltaic cells or for the formation of printed electronic circuits.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: March 19, 2013
    Assignee: NanoGram Corporation
    Inventors: Henry Hieslmair, Shivkumar Chiruvolu, Hui Du
  • Patent number: 8263423
    Abstract: Highly uniform silica nanoparticles can be formed into stable dispersions with a desirable small secondary particle size. The silican particles can be surface modified to form the dispersions. The silica nanoparticles can be doped to change the particle properties and/or to provide dopant for subsequent transfer to other materials. The dispersions can be printed as an ink for appropriate applications. The dispersions can be used to selectively dope semiconductor materials such as for the formation of photovoltaic cells or for the formation of printed electronic circuits.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: September 11, 2012
    Assignee: NanoGram Corporation
    Inventors: Henry Hieslmair, Shivkumar Chiruvolu, Hui Du
  • Patent number: 8030682
    Abstract: A zinc-blende nitride semiconductor free-standing substrate has a front surface and a back surface opposite the front surface. The distance between the front and back surfaces is not less than 200 ?m. The area ratio of the zinc-blende nitride semiconductor to the front surface is not less than 95%.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: October 4, 2011
    Assignee: Hitachi Cable, Ltd.
    Inventor: Hajime Fujikura
  • Patent number: 8030680
    Abstract: Disclosed are a nitride semiconductor light emitting device and a method for manufacturing the same. The nitride semiconductor light emitting device includes a first nitride layer, an active layer including at least one delta-doping layer on the first nitride layer through delta-doping, and a second nitride layer on the active layer.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: October 4, 2011
    Assignee: LG Innotek Co., Ltd.
    Inventor: Tae-Yun Kim
  • Patent number: 7892872
    Abstract: Highly uniform silica nanoparticles can be formed into stable dispersions with a desirable small secondary particle size. The silican particles can be surface modified to form the dispersions. The silica nanoparticles can be doped to change the particle properties and/or to provide dopant for subsequent transfer to other materials. The dispersions can be printed as an ink for appropriate applications. The dispersions can be used to selectively dope semiconductor materials such as for the formation of photovoltaic cells or for the formation of printed electronic circuits.
    Type: Grant
    Filed: January 2, 2008
    Date of Patent: February 22, 2011
    Assignee: NanoGram Corporation
    Inventors: Henry Hieslmair, Shivkumar Chiruvolu, Hui Du
  • Patent number: 7723758
    Abstract: In a calibration method, the relation between dopant concentrations of ?-doping layers in a multilayered semiconductor structure and process parameters is determined S1 based on multiple bulk specimens of the material in which the ?-doping layers are located. A desired dopant concentration is selected S2, and the semiconductor structure with predetermined doping levels can be generated S3 based on the relation between the process parameters and the predetermined doping concentrations.
    Type: Grant
    Filed: November 11, 2004
    Date of Patent: May 25, 2010
    Assignee: Ericsson Telecomunicacoes S.A.
    Inventors: Patricia Lustoza De Souza, Christiana Villas-Bôas Tribuzy, Maurício Pamplona Pires, Sandra Marcela Landi
  • Patent number: 7700936
    Abstract: In one embodiment, a method of producing an optoelectronic nanostructure includes preparing a substrate; providing a quantum well layer on the substrate; etching a volume of the substrate to produce a photonic crystal. The quantum dots are produced at multiple intersections of the quantum well layer within the photonic crystal. Multiple quantum well layers may also be provided so as to form multiple vertically aligned quantum dots. In another embodiment, an optoelectronic nanostructure includes a photonic crystal having a plurality of voids and interconnecting veins; a plurality of quantum dots arranged between the plurality of voids, wherein an electrical connection is provided to one or more of the plurality of quantum dots through an associated interconnecting vein.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: April 20, 2010
    Assignee: University of Delaware
    Inventors: Janusz Murakowski, Garrett Schneider, Dennis W. Prather
  • Publication number: 20100001312
    Abstract: A light-emitting device is disclosed. The light-emitting device comprises a substrate, wherein an ion implanted layer on the top surface of the substrate; a thin silicon film disposing on the ion implanted layer; and a light-emitting stack layer on the thin silicon film. This invention also discloses a method of manufacturing a light-emitting device comprising providing a substrate; forming an ion implanted layer on the top surface of the substrate; providing a light-emitting stack layer; forming a thin silicon film on the bottom surface of the light-emitting stack layer; and bonding the light-emitting stack layer to the substrate with the anodic bonding technique.
    Type: Application
    Filed: July 1, 2009
    Publication date: January 7, 2010
    Applicant: EPISTAR CORPORATION
    Inventor: Chia-Liang Hsu
  • Patent number: 7378695
    Abstract: A solid-state image pickup device is provided in which a pixel forming region 4 and a peripheral circuit forming region 20 are formed on the same semiconductor substrate, a first element isolation portion is formed by an element isolation layer 21 in which an insulating layer is buried into a semiconductor substrate 10 in the peripheral circuit forming region 20, a second element isolation portion is composed of an element isolation region 11 formed within the semiconductor substrate 10 and an element isolation layer 12 projected in the upper direction from the semiconductor substrate 10 in the pixel forming region 4 and an element isolation layer 21 of the first element isolation portion and the element isolation layer 12 of the second element isolation portion contain the same insulating layers 17, 18 and 19. This solid-state image pickup device has a structure capable of suppressing a noise relative to a pixel signal and which can be microminiaturized in the peripheral circuit forming region.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: May 27, 2008
    Assignee: Sony Corporation
    Inventor: Ikuo Yoshihara
  • Publication number: 20060141645
    Abstract: The concentration of oxygen, which causes problems such as decreases in brightness and dark spots through degradation of electrode materials, is lowered in an organic light emitting element having a layer made from an organic compound between a cathode and an anode, and in a light emitting device structured using the organic light emitting element. The average concentration of impurities contained in a layer made from an organic compound used in older to form an organic light emitting element having layers such as a hole injecting layer, a hole transporting layer, a light emitting layer, an electron transporting layer, and an electron injecting layer, is reduced to 5×1019/cm2 or less, preferably equal to or less than 1×1019/cm2, by removing the impurities with the present invention. Formation apparatuses are structured as stated in the specification in order to reduce the impurities in the organic compounds forming the organic light emitting elements.
    Type: Application
    Filed: March 1, 2006
    Publication date: June 29, 2006
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Yasuyuki Arai