Patents by Inventor Hans S. Cho

Hans 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: 7725133
    Abstract: A mobile wireless communication device like a cellular handset includes multiple communication addresses stored in its memory. Each address is associated with one or more inputs of an input key. For example a first telephone number is associated with a single input of a particular key, and a second telephone number may be associated with two sequential inputs of the same key. The communication address is transmitted from the wireless communication device upon entering the one or more key inputs associated therewith and upon maintaining a last of the sequential key inputs for a predetermined time interval.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: May 25, 2010
    Assignee: Motorola, Inc.
    Inventor: Han S. Cho
  • Patent number: 7714330
    Abstract: A silicon nanowire substrate having a structure in which a silicon nanowire film having a fine line-width is 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 silicon nanowire substrate includes 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: August 14, 2007
    Date of Patent: May 11, 2010
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Hans S. Cho, Takashi Noguchi, Wenxu Xianyu, Do-Young Kim, Huaxiang Yin, Xiaoxin Zhang
  • Publication number: 20100112763
    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: Application
    Filed: January 7, 2010
    Publication date: May 6, 2010
    Inventors: Xiaoxin Zhang, Wenxu Xianyu, Takashi Noguchi, Hans S. Cho, Huaxiang Yin
  • Publication number: 20100051899
    Abstract: A method of manufacturing a nanowire, a method of manufacturing a semiconductor apparatus including a nanowire and a semiconductor apparatus formed from the same are provided. The method of manufacturing a semiconductor apparatus may include forming a material layer pattern on a substrate, forming a first insulating layer on the material layer pattern, a first nanowire forming layer and a top insulating layer on the substrate, wherein a total depth of the first insulating layer and the first nanowire forming layer may be formed to be smaller than a depth of the material layer pattern, sequentially polishing the top insulating layer, the first nanowire forming layer and the first insulating layer so that the material layer pattern is exposed, exposing part of the first nanowire forming layer to form an exposed region and forming a single crystalline nanowire on an exposed region of the first nanowire forming layer.
    Type: Application
    Filed: November 3, 2009
    Publication date: March 4, 2010
    Inventor: Hans S. Cho
  • Patent number: 7667300
    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: November 17, 2006
    Date of Patent: February 23, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Xiaoxin Zhang, Wenxu Xianyu, Takashi Noguchi, Hans S. Cho, Huaxiang Yin
  • Publication number: 20100041214
    Abstract: A high quality single crystal substrate and a method of fabricating the same are provided. The method of fabricating a single crystal substrate includes: forming an insulator on a substrate; forming a window in the insulator, the window exposing a portion of the substrate; forming an epitaxial growth silicon or germanium seed layer on the portion of the substrate exposed through the window; depositing a silicon or germanium material layer, which are crystallization target material layers, on the epitaxial growth silicon 6r germanium seed layer and the insulator; and crystallizing the crystallization target material layer by melting and cooling the crystallization target material layer.
    Type: Application
    Filed: August 7, 2009
    Publication date: February 18, 2010
    Inventors: Hans S. Cho, Takashi Noguchi, Wenxu Xianyu, Xiaoxin Zhang, Huaxiang Yin
  • Patent number: 7662678
    Abstract: Provided are methods of forming a more highly-oriented silicon thin layer having a larger grain size, and a substrate having the same. The methods may include forming an aluminum (Al) layer on a base substrate, forming a more highly-oriented Al layer by recrystallizing the Al layer under vacuum, forming a more highly-oriented ?-Al2O3 layer on the more highly-oriented Al layer and/or epitaxially growing a silicon layer on the more highly-oriented ?-Al2O3 layer. The method may be used to manufacture a semiconductor device having higher carrier mobility.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: February 16, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Wenxu Xianyu, Hans S. Cho, Takashi Noguchi, Young-Soo Park, Xiaoxin Zhang, Huaxiang Yin, Hyuck Lim, Kyung-Bae Park, Suk-Pil Kim
  • Patent number: 7642177
    Abstract: A method of manufacturing a nanowire, a method of manufacturing a semiconductor apparatus including a nanowire and a semiconductor apparatus formed from the same are provided. The method of manufacturing a semiconductor apparatus may include forming a material layer pattern on a substrate, forming a first insulating layer on the material layer pattern, a first nanowire forming layer and a top insulating layer on the substrate, wherein a total depth of the first insulating layer and the first nanowire forming layer may be formed to be smaller than a depth of the material layer pattern, sequentially polishing the top insulating layer, the first nanowire forming layer and the first insulating layer so that the material layer pattern is exposed, exposing part of the first nanowire forming layer to form an exposed region and forming a single crystalline nanowire on an exposed region of the first nanowire forming layer.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: January 5, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Hans S. Cho
  • Patent number: 7629205
    Abstract: A thin film transistor (TFT) that can prevent damage to a silicon layer under a gate electrode in an annealing process by using a first gate electrode having high thermal resistance and a second gate electrode having high reflectance and a method of manufacturing the TFT are provided. The method of manufacturing a TFT includes forming a double-layered gate electrode which includes a first gate electrode formed of a material having high thermal resistance and a second gate electrode formed of a metal having high optical reflectance on the first gate electrode, and forming a source and a drain by annealing doped regions on both sides of a silicon layer under the gate electrode by radiating a laser beam onto the entire upper surface of the silicon layer.
    Type: Grant
    Filed: January 12, 2006
    Date of Patent: December 8, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hans S. Cho, Hyuck Lim, Takashi Noguchi, Jang-yeon Kwon
  • Patent number: 7611932
    Abstract: A method of manufacturing a thin film transistor is provided. The method includes forming an amorphous silicon layer on a substrate, forming a source region, a drain region, and a region of a plurality of channels electrically interposed between the source region and the drain region by patterning the amorphous silicon layer, annealing a region of the channels, sequentially forming a gate oxide film and a gate electrode on a channel surface, and doping the source region and the drain region.
    Type: Grant
    Filed: August 9, 2005
    Date of Patent: November 3, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Huaxiang Yin, Wenxu Xianyu, Takashi Noguchi, Hans S. Cho, Ji-sim Jung
  • Patent number: 7575962
    Abstract: Provided are a fin structure and a method of manufacturing a fin transistor adopting the fin structure. A plurality of mesa structures including sidewalls are formed on the substrate. A semiconductor layer is formed on the mesa structures. A capping layer is formed on the semiconductor layer. Thus, the semiconductor layer is protected by the capping layer and includes a portion which is to be formed as a fin structure. A portion of an upper portion of the capping layer is removed by planarizing, and thus a portion of the semiconductor layer on upper surfaces of the mesa structures is removed. As a result, fin structures are formed on sides of the mesa structures to be isolated from one another. Therefore, a fin structure having a very narrow width can be formed, and a thickness and a location of the fin structure can be easily controlled.
    Type: Grant
    Filed: July 16, 2007
    Date of Patent: August 18, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hans S. Cho, Young-soo Park, Wenxu Xianyu
  • Publication number: 20090191673
    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: Application
    Filed: March 26, 2009
    Publication date: July 30, 2009
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Takashi Noguchi, Wenxu Xianyu, Hans S. Cho, Huaxiang Yin
  • Patent number: 7566364
    Abstract: Provided may be a method of fabricating nanowires and a method of fabricating a transistor having the same. The method may include: forming a template layer on a substrate, the template layer having a first lateral surface and a second lateral surface facing the first surface; forming pores in the template layer, the pores disposed between the first lateral surface and the second lateral surface in the template layer and having first apertures in the first lateral surface; forming a single-crystalline material layer contacting the first apertures disposed in the first lateral surface of the template layer; forming second apertures connecting pores disposed in the second lateral surface; supplying gaseous crystal growth materials through the second apertures; and forming crystalline nanowires in the pores by crystal growth from the single-crystalline material layer. The nanowires may be made of crystalline materials, e.g., Si or SiGe, and may be formed parallel to the substrate.
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: July 28, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Wenxu Xianyu, Young-Soo Park, Takashi Noguchi, Hans S. Cho, Xiaoxin Zhang, Huaxiang Yin
  • Patent number: 7560317
    Abstract: Provided are a method of forming a single crystalline silicon layer, a structure including the same, and method of fabricating a thin film transistor (“TFT”) using the same. The method of forming the single crystalline silicon layer includes forming a silicon nitride layer on a substrate, forming an insulating layer on the silicon nitride layer, forming a hole in the insulating layer to a predetermined dimension, depositing a first silicon layer on an exposed bottom of the hole using a selective deposition process, depositing a second silicon layer on the insulating layer and the first silicon layer formed in the hole, and crystallizing the second silicon layer using a thermal process. In this method, a high-quality single crystalline silicon layer can be obtained.
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: July 14, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Takashi Noguchi, Wenxu Xianyu, Xiaoxin Zhang, Hans S. Cho, Kyung-bae Park
  • Patent number: 7557411
    Abstract: Semiconductor-on-insulator (SOI) structures, semiconductor devices using the same and methods of manufacturing the same, and more particularly, to a structure with a single-crystalline (for example, germanium (x-Ge)) layer on an insulating layer, semiconductor devices using the same, and methods of manufacturing the same. The SOI structure may include a single-crystalline substrate formed of a first semiconductor material, a first insulating layer formed on the substrate and having at least one window exposing a portion of the substrate, a first epitaxial growth region formed on a surface of the substrate exposed by the window and formed of at least one of the first semiconductor material and a second semiconductor material, and a first single-crystalline layer formed on the first insulating layer and the first epitaxial growth region and formed of the second semiconductor material, and crystallized using a surface of the first epitaxial growth region as a seed layer for crystallization.
    Type: Grant
    Filed: April 5, 2006
    Date of Patent: July 7, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Takashi Noguchi, Hans S. Cho, Wenxu Xianyu, Huaxiang Yin, Xiaoxin Zhang
  • Publication number: 20090149007
    Abstract: Provided are an electronic device and a method of manufacturing the same. The device includes a plastic substrate, a transparent thermal conductive layer stacked on the plastic substrate, a polysilicon layer stacked on the thermal conductive layer; and a functional device disposed on the polysilicon layer. The functional device is any one of a transistor, a light emitting device, and a memory device. The functional device may be a thin film transistor including a gate stack stacked on the polysilicon layer.
    Type: Application
    Filed: February 13, 2009
    Publication date: June 11, 2009
    Applicant: SAMSUNG ELECTRONICS CO., LTD
    Inventors: Ji-sim JUNG, Takashi Noguchi, Hans S. Cho, Do-young Kim, Kyung-bae Park
  • Patent number: 7531240
    Abstract: A method of fabricating a large substrate with a locally integrated single crystalline silicon layer is provided. The method includes: forming a buffer layer on a support plate; separately fabricating a single crystalline silicon layer; attaching the single crystalline silicon layer having a predetermined thickness, which is separately fabricated, to a predetermined portion in the support plate; forming a non-single crystalline silicon layer having a predetermined thickness to cover the single crystalline silicon layer and the buffer layer; and processing the non-single crystalline silicon layer to expose a surface of the non-single crystalline silicon layer and to level the surface of the non-single crystalline silicon layer with a surface of the amorphous silicon layer.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: May 12, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Wenxu Xianyu, Takashi Noguchi, Young-soo Park, Hans S. Cho, Huaxiang Yin
  • Patent number: 7511381
    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: October 13, 2005
    Date of Patent: March 31, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Takashi Noguchi, Wenxu Xianyu, Hans S. Cho, Huaxiang Yin
  • Publication number: 20090028493
    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: Application
    Filed: July 26, 2007
    Publication date: January 29, 2009
    Inventors: David A. Fattal, Nathaniel J. Quitoriano, Hans S. Cho, Marco Fiorentino, Theodore I. Kamins
  • Patent number: 7474811
    Abstract: A photonic apparatus and system employ a plurality of nanowires distributed in a low-index optical waveguide. The plurality of nanowires collectively one or more of produces, enhances, modulates and detects an optical field. The low-index optical waveguide confines the optical field in a vicinity of the plurality of nanowires. The photonic system includes a circuit to one or more of electrically bias the plurality of nanowires and collect electrons produced in the plurality of nanowires.
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: January 6, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Nathaniel J. Quitoriano, Marco Fiorentino, Theodore I. Kamins, David A. Fattal, Hans S. Cho