Patents by Inventor Chyi S. Chern

Chyi S. Chern 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: 7642183
    Abstract: A high power, high luminous flux light emitting diode (LED) comprises a substrate, a light-emitting structure, a first electrode and a second electrode. The LED has a top surface layout design in which the first electrode has a number of legs extending in one direction, and the second electrode has a number of legs extending in the opposite direction. At least portions of the legs of the first electrode are interspersed with and spaced apart from portions of the legs of the second electrode. This provides a configuration that enhances current spreading along the length of the legs of both electrodes.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: January 5, 2010
    Assignees: Dalian Meiming
    Inventors: Yongsheng Zhao, William W. So, Kevin Y. Ma, Chyi S. Chern, Heng Liu, Eugene J. Ruddy
  • Patent number: 7368379
    Abstract: An interconnect structure for a semiconductor device and its method of manufacture is provided. The interconnect structure includes a multi-layer structure having one or more stress-relief layers. In an embodiment, stress-relief layers are positioned between layers of electroplated copper or other conductive material. The stress-relief layer counteracts stress induced by the conductive material and helps prevent or reduce a pull-back void. For an interconnect structure using electroplated copper, the stress-relief layer may be formed by temporarily reducing the electroplating current, thereby causing a thin film of copper having a larger grain size to be formed between other layers of copper. The larger grain size typically exhibits more of a compressive stress than copper with a smaller grain size. The stress relief layer may also be formed of other materials, such as SIP-Cu, Ta, SiC, or the like.
    Type: Grant
    Filed: August 4, 2005
    Date of Patent: May 6, 2008
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Jung-Chih Tsao, Kei-Wei Chen, Yu-Ku Lin, Chyi S Chern
  • Patent number: 7193245
    Abstract: A high power, high luminous flux light emitting diode (LED) comprises a substrate, a light-emitting structure, a first electrode and a second electrode. The LED has a top surface layout design in which the first electrode has a number of legs extending in one direction, and the second electrode has a number of legs extending in the opposite direction. At least portions of the legs of the first electrode are interspersed with and spaced apart from portions of the legs of the second electrode. This provides a configuration that enhances current spreading along the length of the legs of both electrodes.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: March 20, 2007
    Assignee: Lumei Optoelectronics Corporation
    Inventors: Yongsheng Zhao, William W. So, Kevin Y. Ma, Chyi S. Chern, Heng Liu, Eugene J. Ruddy
  • Patent number: 6740580
    Abstract: A method to form copper interconnects is described. The method may be used to form single or dual damascene interconnects. The addition of an aluminum barrier layer to the conventional barrier layer creates a superior barrier to copper diffusion. A substrate layer is provided. A dielectric layer is deposited overlying the substrate layer. The dielectric layer patterned to form interconnect trenches. An optional titanium adhesion layer may be deposited. An aluminum barrier layer is deposited overlying the interior surfaces of the trenches. A second barrier layer, comprising for instance titanium and titanium nitride, is deposited overlying the aluminum barrier layer. A copper layer is deposited overlying the second barrier layer and filling the interconnect trenches. The copper layer, the second barrier layer, and the aluminum barrier layer are polished down to the top surface of the dielectric layer to define the copper interconnects, and complete the fabrication of the integrated circuit device.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: May 25, 2004
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Subhash Gupta, Chyi S. Chern, Mei Sheng Zhou
  • Publication number: 20040041160
    Abstract: A high power, high luminous flux light emitting diode (LED) comprises a substrate, a light-emitting structure, a first electrode and a second electrode. The LED has a top surface layout design in which the first electrode has a number of legs extending in one direction, and the second electrode has a number of legs extending in the opposite direction. At least portions of the legs of the first electrode are interspersed with and spaced apart from portions of the legs of the second electrode. This provides a configuration that enhances current spreading along the length of the legs of both electrodes.
    Type: Application
    Filed: September 4, 2003
    Publication date: March 4, 2004
    Inventors: Yongsheng Zhao, William W. So, Kevin Y. Ma, Chyi S. Chern, Heng Liu, Eugene J. Ruddy
  • Publication number: 20030218176
    Abstract: A high power, high luminous flux light emitting diode (LED) comprises a substrate, a light-emitting structure, a first electrode and a second electrode. The LED has a top surface layout design in which the first electrode has a number of legs extending in one direction, and the second electrode has a number of legs extending in the opposite direction. At least portions of the legs of the first electrode are interspersed with and spaced apart from portions of the legs of the second electrode. This provides a configuration that enhances current spreading along the length of the legs of both electrodes.
    Type: Application
    Filed: May 24, 2002
    Publication date: November 27, 2003
    Inventors: Yongsheng Zhao, William W. So, Kevin Y. Ma, Chyi S. Chern, Heng Liu, Eugene J. Ruddy
  • Patent number: 6650018
    Abstract: A high power, high luminous flux light emitting diode (LED) comprises a substrate, a light-emitting structure, a first electrode and a second electrode. The LED has a top surface layout design in which the first electrode has a number of legs extending in one direction, and the second electrode has a number of legs extending in the opposite direction. At least portions of the legs of the first electrode are interspersed with and spaced apart from portions of the legs of the second electrode. This provides a configuration that enhances current spreading along the length of the legs of both electrodes.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: November 18, 2003
    Assignee: AXT, Inc.
    Inventors: Yongsheng Zhao, William W. So, Kevin Y. Ma, Chyi S. Chern, Heng Liu, Eugene J. Ruddy