Patents by Inventor Han S. Cho

Han S. Cho 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).

  • Patent number: 8097499
    Abstract: A semiconductor device and method thereof. The example method may include forming a semiconductor device, including forming a first layer on a substrate, the first layer including aluminum nitride (AlN), forming a second layer by oxidizing a surface of the first layer and forming a third layer on the second layer, the first, second and third layers each being highly oriented with respect to one of a plurality crystallographic planes. The example semiconductor device may include a substrate including a first layer, the first layer including aluminum nitride (AlN), a second layer formed by oxidizing a surface of the first layer and a third layer formed on the second layer, the first, second and third layers each being highly oriented with respect to one of a plurality crystallographic planes.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: January 17, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Wenxu Xianyu, Young-soo Park, Jun-ho Lee, Hyuk Lim, Hans S. Cho, Huaxiang Yin
  • Publication number: 20110303890
    Abstract: An electrically actuated device includes a first electrode and a second electrode crossing the first electrode at a non-zero angle, thereby forming a junction therebetween. A material is established on the first electrode and at the junction. At least a portion of the material is a matrix region. A current conduction channel extends substantially vertically between the first and second electrodes, and is defined in at least a portion of the material positioned at the junction. The current conduction channel has a controlled profile of dopants therein.
    Type: Application
    Filed: June 28, 2011
    Publication date: December 15, 2011
    Inventors: Matthew D. Pickett, Hans S. Cho, Julien Borghetti, Duncan Stewart
  • Publication number: 20110263088
    Abstract: A thin film transistor comprises an Si-based channel having a nonlinear electron-moving path, a source and a drain disposed at both sides of the channel, a gate disposed above the channel, an insulator interposed between the channel and the gate, and a substrate supporting the channel and the source and the drain disposed at either side of the channel respectively.
    Type: Application
    Filed: June 30, 2011
    Publication date: October 27, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Huaxiang YIN, Takashi NOGUCHI, Hyuk LIM, Wenxu XIANYU, Hans S. CHO
  • Publication number: 20110227022
    Abstract: A memristor having an active region having a first electrode, a second electrode, and a nanostructure connecting the first electrode with the second electrode. The nanostructure includes a generally insulating material configured to have an electrically conductive channel formed in the material. The nanostructure forms the active region and has a length and a thickness, where the length is substantially equivalent to a distance extending from the first electrode to the second electrode along the nanostructure and the thickness is a distance across the nanostructure substantially perpendicular to the length of the nanostructure. The length of the nanostructure is substantially greater than the thickness of the nanostructure.
    Type: Application
    Filed: January 15, 2009
    Publication date: September 22, 2011
    Inventor: Hans S. Cho
  • Patent number: 8021936
    Abstract: A thin film transistor (TFT) and a method of manufacturing the same are provided. The TFT includes a transparent substrate, an insulating layer on a region of the transparent substrate, a monocrystalline silicon layer, which includes source, drain, and channel regions, on the insulating layer and a gate insulating film and a gate electrode on the channel region of the monocrystalline silicon layer.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: September 20, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Takashi Noguchi, Wenxu Xianyu, Hans S. Cho, Huaxiang Yin
  • Patent number: 8022408
    Abstract: Example embodiments relate to a crystalline nanowire substrate having a structure in which a crystalline nanowire film having a relatively fine line-width may be formed on a substrate, a method of manufacturing the same, and a method of manufacturing a thin film transistor using the same. The method of manufacturing the crystalline nanowire substrate may include preparing a substrate, forming an insulating film on the substrate, forming a silicon film on the insulating film, patterning the insulating film and the silicon film into a strip shape, reducing the line-width of the insulating film by undercut etching at least one lateral side of the insulating film, and forming a self-aligned silicon nanowire film on an upper surface of the insulating film by melting and crystallizing the silicon film.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: September 20, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hans S. Cho, Takashi Noguchi, Wenxu Xianyu, Do-Young Kim, Huaxiang Yin, Xiaoxin Zhang
  • Patent number: 8012819
    Abstract: A semiconductor device includes a transistor. The transistor includes a substrate having an inclined surface, a first upper surface extending from a lower portion of the inclined surface, and a second upper surface extending from an upper end of the inclined surface. A gate stack structure is formed on the inclined surface and includes a gate electrode. A first impurity region formed on one of the first and second upper surfaces contacts the gate stack structure. A second impurity region formed on the second upper surface contacts the gate stack structure. A channel between the first and second impurity regions is formed along the inclined surface in a crystalline direction.
    Type: Grant
    Filed: January 7, 2010
    Date of Patent: September 6, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Xiaoxin Zhang, Wenxu Xianyu, Takashi Noguchi, Hans S. Cho, Huaxiang Yin
  • Patent number: 7999322
    Abstract: A thin film transistor comprises an Si-based channel having a nonlinear electron-moving path, a source and a drain disposed at both sides of the channel, a gate disposed above the channel, an insulator interposed between the channel and the gate, and a substrate supporting the channel and the source and the drain disposed at either side of the channel respectively.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: August 16, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Huaxiang Yin, Takashi Noguchi, Hyuk Lim, Wenxu Xianyu, Hans S. Cho
  • Publication number: 20110182107
    Abstract: A memristive routing device (200) includes a memristive matrix (240), mobile dopants (255) moving with the memristive matrix (240) in response to programming electrical fields and remaining stable within the memristive matrix (240) in the absence of the programming electrical fields; and at least three electrodes (210, 220, 230) surrounding the memristive matrix (240). A method for tuning electrical circuits with a memristive device (900) includes measuring a circuit characteristic (805) and applying a programming voltage to the memristive device (900) which causes motion of dopants within the memristive device (900) to alter the circuit characteristic (805).
    Type: Application
    Filed: December 12, 2008
    Publication date: July 28, 2011
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Wei Wu, John Paul Strachen, R. Stanely Williams, Marco Florentino, Shih-Yuan Wang, Hans S. Cho, Julien Borghetti, Sagi Varghese Mathai
  • Publication number: 20110057195
    Abstract: A thin film transistor comprises an Si-based channel having a nonlinear electron-moving path, a source and a drain disposed at both sides of the channel, a gate disposed above the channel, an insulator interposed between the channel and the gate, and a substrate supporting the channel and the source and the drain disposed at either side of the channel respectively.
    Type: Application
    Filed: November 16, 2010
    Publication date: March 10, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Huaxiang YIN, Takashi NOGUCHI, Hyuk LIM, Wenxu XIANYU, Hans S. CHO
  • Publication number: 20110012222
    Abstract: A method of making a crystalline semiconductor structure provides a photonic device by employing low thermal budget annealing process. The method includes annealing a non-single crystal semiconductor film formed on a substrate to form a polycrystalline layer that includes a transition region adjacent to a surface of the film and a relatively thicker columnar region between the transition region and the substrate. The transition region includes small grains with random grain boundaries. The columnar region includes relatively larger columnar grains with substantially parallel grain boundaries that are substantially perpendicular to the substrate. The method further includes etching the surface to expose the columnar region having an irregular serrated surface.
    Type: Application
    Filed: July 17, 2009
    Publication date: January 20, 2011
    Inventors: Hans S. Cho, Theodore I. Kamins
  • Publication number: 20110008920
    Abstract: A microlens, an image sensor including the microlens, a method of forming the microlens and a method of manufacturing the image sensor are provided. The microlens includes a polysilicon pattern, having a cylindrical shape, formed on a substrate, and a round-type shell portion enclosing the polysilicon pattern. The microlens may further include a filler material filling an interior of the shell portion, or a second shell portion covering the first shell portion. The method of forming a microlens includes forming a silicon pattern on a semiconductor substrate having a lower structure, forming a capping film on the semiconductor substrate over the silicon pattern, annealing the silicon pattern and the capping film altering the silicon pattern to a polysilicon pattern having a cylindrical shape and the capping film to a shell portion for a round-type microlens, and filling an interior of the shell portion with a lens material through an opening between the semiconductor substrate and an edge of the shell portion.
    Type: Application
    Filed: August 20, 2010
    Publication date: January 13, 2011
    Inventors: Huaxiang Yin, Hyuck Lim, Young-soo Park, Wenxu Xianyu, Hans S. Cho
  • Publication number: 20110006284
    Abstract: A photonic structure includes a plurality of annealed, substantially smooth-surfaced ellipsoids arranged in a matrix. Additionally, a method of producing a photonic structure is provided. The method includes providing a semiconductor material, providing an etch mask comprising a two-dimensional hole array, and disposing the etch mask on at least one surface of the semiconductor material. The semiconductor material is then etched through the hole array of the etch mask to produce holes in the semiconductor material and thereafter applying a passivation layer to surfaces of the holes. Additionally, the method includes repeating the etching and passivation-layer application to produce a photonic crystal structure that contains ellipsoids within the semiconductor material and annealing the photonic crystal structure to smooth the surfaces of the ellipsoids.
    Type: Application
    Filed: July 13, 2009
    Publication date: January 13, 2011
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Hans S. Cho, David A. Fattal, Theodore I. Kamins
  • Patent number: 7859054
    Abstract: A thin film transistor comprises an Si-based channel having a nonlinear electron-moving path, a source and a drain disposed at both sides of the channel, a gate disposed above the channel, an insulator interposed between the channel and the gate, and a substrate supporting the channel and the source and the drain disposed at either side of the channel respectively.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: December 28, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Huaxiang Yin, Takashi Noguchi, Hyuk Lim, Wenxu Xianyu, Hans S. Cho
  • Patent number: 7781853
    Abstract: Various embodiments of the present invention are directed to surface-plasmon-enhanced electromagnetic-radiation-emitting devices and to methods of fabricating these devices. In one embodiment of the present invention, an electromagnetic-radiation-emitting device comprises a multilayer core, a metallic device layer, and a substrate. The multilayer core has an inner layer and an outer layer, wherein the outer layer is configured to surround at least a portion of the inner layer. The metallic device layer is configured to surround at least a portion of the outer layer. The substrate has a bottom conducting layer in electrical communication with the inner layer and a top conducting layer in electrical communication with the metallic device layer such that the exposed portion emits surface-plasmon-enhanced electromagnetic radiation when an appropriate voltage is applied between the bottom conducting layer and the top conducting layer.
    Type: Grant
    Filed: July 26, 2007
    Date of Patent: August 24, 2010
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: David A. Fattal, Nathaniel J. Quitoriano, Hans S. Cho, Marco Fiorentino, Theodore I. Kamins
  • Publication number: 20100208368
    Abstract: A microlens, an image sensor including the microlens, a method of forming the microlens and a method of manufacturing the image sensor are provided. The microlens includes a polysilicon pattern, having a cylindrical shape, formed on a substrate, and a round-type shell portion enclosing the polysilicon pattern. The microlens may further include a filler material filling an interior of the shell portion, or a second shell portion covering the first shell portion. The method of forming a microlens includes forming a silicon pattern on a semiconductor substrate having a lower structure, forming a capping film on the semiconductor substrate over the silicon pattern, annealing the silicon pattern and the capping film altering the silicon pattern to a polysilicon pattern having a cylindrical shape and the capping film to a shell portion for a round-type microlens, and filling an interior of the shell portion with a lens material through an opening between the semiconductor substrate and an edge of the shell portion.
    Type: Application
    Filed: April 26, 2010
    Publication date: August 19, 2010
    Inventors: Huaxiang Yin, Hyuck Lim, Young-soo Park, Wenxu Xianyu, Hans S. Cho
  • Publication number: 20100200834
    Abstract: Example embodiments relate to a crystalline nanowire substrate having a structure in which a crystalline nanowire film having a relatively fine line-width may be formed on a substrate, a method of manufacturing the same, and a method of manufacturing a thin film transistor using the same. The method of manufacturing the crystalline nanowire substrate may include preparing a substrate, forming an insulating film on the substrate, forming a silicon film on the insulating film, patterning the insulating film and the silicon film into a strip shape, reducing the line-width of the insulating film by undercut etching at least one lateral side of the insulating film, and forming a self-aligned silicon nanowire film on an upper surface of the insulating film by melting and crystallizing the silicon film.
    Type: Application
    Filed: March 22, 2010
    Publication date: August 12, 2010
    Inventors: Hans S. Cho, Takashi Noguchi, Wenxu Xianyu, Do-Young Kim, Huaxiang Yin, Xiaoxin Zhang
  • Patent number: 7772711
    Abstract: A semiconductor device including a substrate, a P-MOS single crystal TFT formed on the substrate, and an N-MOS single crystal TFT formed on the P-MOS single crystal TFT. The source region of the P-MOS single crystal TFT and the source region of the N-MOS single crystal TFT may be connected to each other. The P-MOS single crystal TFT and the N-MOS single crystal TFT may share a common gate. Also, the P-MOS single crystal TFT may include a single crystal silicon layer with a crystal plane of (100) and a crystal direction of <100>. The N-MOS single crystal TFT may include a single crystal silicon layer having the same crystal direction as the single crystal silicon layer of the P-MOS single crystal TFT and having a tensile stress greater than the single crystal silicon layer of the P-MOS single crystal TFT.
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: August 10, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Takashi Noguchi, Hans S. Cho, Wenxu Xianyu, Do-young Kim, Jang-yeong Kwon, Huaxiang Yin, Kyung-bae Park, Xiaoxin Zhang
  • Publication number: 20100187572
    Abstract: Methods of fabricating a suspended mono-crystalline structure use annealing to induce surface migration and cause a surface transformation to produce the suspended mono-crystalline structure above a cavity from a heteroepitaxial layer provided on a crystalline substrate. The methods include forming a three dimensional (3-D) structure in the heteroepitaxial layer where the 3-D structure includes high aspect ratio elements. The 3-D structure is annealed at a temperature below a melting point of the heteroepitaxial layer. The suspended mono-crystalline structure may be a portion of a semiconductor-on-nothing (SON) substrate.
    Type: Application
    Filed: January 26, 2009
    Publication date: July 29, 2010
    Inventors: Hans S. Cho, Theodore I. Kamins
  • Patent number: 7750424
    Abstract: A microlens, an image sensor including the microlens, a method of forming the microlens and a method of manufacturing the image sensor are provided. The microlens includes a polysilicon pattern, having a cylindrical shape, formed on a substrate, and a round-type shell portion enclosing the polysilicon pattern. The microlens may further include a filler material filling an interior of the shell portion, or a second shell portion covering the first shell portion. The method of forming a microlens includes forming a silicon pattern on a semiconductor substrate having a lower structure, forming a capping film on the semiconductor substrate over the silicon pattern, annealing the silicon pattern and the capping film altering the silicon pattern to a polysilicon pattern having a cylindrical shape and the capping film to a shell portion for a round-type microlens, and filling an interior of the shell portion with a lens material through an opening between the semiconductor substrate and an edge of the shell portion.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: July 6, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Huaxiang Yin, Hyuck Lim, Young-soo Park, Wenxu Xianyu, Hans S. Cho