Patents by Inventor George Chu

George Chu 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).

  • Publication number: 20200227268
    Abstract: A {100} indium phosphide (InP) wafer with pits distributed on the back side thereof, a method and an etching solution for manufacturing thereof are provided, wherein the pits on the back side have an elongated shape with a maximum dimension of the long axis of 65 ?m, and the pits have a maximum depth of 6.0 ?m. The {100} indium phosphide (InP) wafer has controllable pits distribution on the back side, thus provide a controllable emissivity of the wafer back side surface for better control of wafer back side heating during the epitaxial growth.
    Type: Application
    Filed: June 29, 2018
    Publication date: July 16, 2020
    Inventors: Liugang WANG, Haimiao LI, Sung-Nee George CHU
  • Patent number: 10026707
    Abstract: A copper pillar bump semiconductor packaging method patterns an organic insulation layer formed under the copper pillar bumps to areas surrounding and in the vicinity of the copper pillar bumps only. The organic insulation layer, typically a thin film polymer layer, acts as a barrier layer for the copper pillar bumps to protect the semiconductor wafer during the copper pillar flip chip bonding process. The copper pillar bump semiconductor packaging method limits the areas where the organic insulation layer is applied to reduce the stress introduced to the semiconductor wafer by the organic insulation layer. In another embodiment, a copper pillar bump semiconductor packaging method patterns an organic insulation layer formed under the copper pillar bumps to areas surrounding the copper pillar bumps and along the path of a redistribution layer without using a large and continuous organic insulation layer.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: July 17, 2018
    Assignee: Microchip Technology Incorportated
    Inventor: George Chu
  • Publication number: 20180090460
    Abstract: A copper pillar bump semiconductor packaging method patterns an organic insulation layer formed under the copper pillar bumps to areas surrounding and in the vicinity of the copper pillar bumps only. The organic insulation layer, typically a thin film polymer layer, acts as a barrier layer for the copper pillar bumps to protect the semiconductor wafer during the copper pillar flip chip bonding process. The copper pillar bump semiconductor packaging method limits the areas where the organic insulation layer is applied to reduce the stress introduced to the semiconductor wafer by the organic insulation layer. In another embodiment, a copper pillar bump semiconductor packaging method patterns an organic insulation layer formed under the copper pillar bumps to areas surrounding the copper pillar bumps and along the path of a redistribution layer without using a large and continuous organic insulation layer.
    Type: Application
    Filed: August 1, 2017
    Publication date: March 29, 2018
    Inventor: George Chu
  • Patent number: 7902145
    Abstract: Methods of sterilizing dermal fillers and injectable collagen material have been developed which reduce the level of active biological contaminants or pathogens without adversely affecting the material, i.e., wherein the dermal fillers and injectable collagen material retain their same properties before and after its terminal sterilization. In one embodiment the method for sterilizing the dermal filler or injectable collagen material that is sensitive to radiation contains the steps of protecting the filler or material from radiation, and irradiating the filler or material with a suitable dose of radiation for a time and at a rate effective to sterilize the filler or injectable material. In a preferred embodiment the method for sterilizing the dermal filler or injectable collagen material that is sensitive to radiation includes the steps of a) freezing the filler or material at a temperature below its freezing temperature, which is generally below 0° C.
    Type: Grant
    Filed: May 17, 2006
    Date of Patent: March 8, 2011
    Assignee: Albiorex, LLC
    Inventors: George Chu, C. Randall Harrell, Hector J. Gomez
  • Patent number: 7779704
    Abstract: A torque sensing and control device for tools comprises: a torque sensing and transmitting adapter fabricated with rib structure and mounted on or built in a fastening tool; at least a torque sensor secured on at least a rib evenly spaced and formed on the adapter and operatively sensing a torque signal when applying a torque on a work or object when rotatably operating the fastening tool; and a digital display control module operatively receiving the torque signal, displaying a torque data and generating an audio or visual warning signal for reminding the user for stopping operation of the fastening tool, or for switching off power or air supply to the fastening tool, and or actuating a delay control to restart a next fastening operation in a pre-determined time interval.
    Type: Grant
    Filed: February 2, 2009
    Date of Patent: August 24, 2010
    Inventor: George Chu
  • Publication number: 20100192705
    Abstract: A torque sensing and control device for tools comprises: a torque sensing and transmitting adapter fabricated with rib structure and mounted on or built in a fastening tool; at least a torque sensor secured on at least a rib evenly spaced and formed on the adapter and operatively sensing a torque signal when applying a torque on a work or object when rotatably operating the fastening tool; and a digital display control module operatively receiving the torque signal, displaying a torque data and generating an audio or visual warning signal for reminding the user for stopping operation of the fastening tool, or for switching off power or air supply to the fastening tool, and or actuating a delay control to restart a next fastening operation in a pre-determined time interval.
    Type: Application
    Filed: February 2, 2009
    Publication date: August 5, 2010
    Inventor: George Chu
  • Patent number: 7743791
    Abstract: The present invention generally relates to an air control module unit for a portable pneumatic tool, more particularly, to an air control module unit that actuates a valve stem inside an air inlet block of the air inlet module by a correspondent air bleed valve in the air actuation module. The air control module unit for a portable pneumatic tool comprising: an air inlet module, which has at least one valve stem inside an air inlet block, the air inlet block having plug screws on both ends towards the valve stem and one plug screw on the intersectional direction of the valve stem with at least one air inlet port opening for hooking up the compressed air; an air actuation module having a bleed valve inside the valve block; a plurality of flexible air hoses with a plurality of dimensions and being prepared for connecting the air inlet module and air actuation module; and a plurality of hose connectors and rubber seats with a plurality of types for connecting the air inlet module and the air operation module.
    Type: Grant
    Filed: April 25, 2007
    Date of Patent: June 29, 2010
    Assignee: China Pneumatic Corporation
    Inventor: George Chu
  • Patent number: 7501693
    Abstract: A low dropout (LDO) regulator device includes an LDO regulator integrated circuit housed in a 4-pin quad flat no-lead (QFN) package where the exposed die paddle is used as the ground terminal. The LDO regulator integrated circuit is formed on a semiconductor substrate. The 4-pin QFN package includes four perimeter lands connected to the input terminal, the output terminal, the enable terminal and the bypass terminal of the LDO regulator integrated circuit. The die paddle is to be electrically connected to a ground potential to allow the ground current of the LDO regulator integrated circuit to flow through the substrate and the die paddle of the 4-pin QFN package.
    Type: Grant
    Filed: November 17, 2006
    Date of Patent: March 10, 2009
    Assignee: Micrel, Inc.
    Inventors: George Chu, Martin Alter
  • Publication number: 20080264507
    Abstract: The present invention generally relates to an air control module unit for a portable pneumatic tool, more particularly, to an air control module unit that actuates a valve stem inside an air inlet block of the air inlet module by a correspondent air bleed valve in the air actuation module. The air control module unit for a portable pneumatic tool comprising: an air inlet module, which has at least one valve stem inside an air inlet block, the air inlet block having plug screws on both ends towards the valve stem and one plug screw on the intersectional direction of the valve stem with at least one air inlet port opening for hooking up the compressed air; an air actuation module having a bleed valve inside the valve block; a plurality of flexible air hoses with a plurality of dimensions and being prepared for connecting the air inlet module and air actuation module; and a plurality of hose connectors and rubber seats with a plurality of types for connecting the air inlet module and the air operation module.
    Type: Application
    Filed: April 25, 2007
    Publication date: October 30, 2008
    Inventor: George Chu
  • Publication number: 20080135994
    Abstract: A low dropout (LDO) regulator device includes an LDO regulator integrated circuit housed in a 4-pin quad flat no-lead (QFN) package where the exposed die paddle is used as the ground terminal. The LDO regulator integrated circuit is formed on a semiconductor substrate. The 4-pin QFN package includes four perimeter lands connected to the input terminal, the output terminal, the enable terminal and the bypass terminal of the LDO regulator integrated circuit. The die paddle is to be electrically connected to a ground potential to allow the ground current of the LDO regulator integrated circuit to flow through the substrate and the die paddle of the 4-pin QFN package.
    Type: Application
    Filed: November 17, 2006
    Publication date: June 12, 2008
    Applicant: MICREL, INC.
    Inventors: George Chu, Martin Alter
  • Patent number: 7331047
    Abstract: Software running on a desktop device determines whether or not binaries (executables) need to be pushed to a remote device. If binaries need to be pushed to the remote device, the desktop determines which particular binaries need to be pushed to the remote device, and pushes the needed binaries to the remote device. Once all needed binaries are loaded onto the remote device, functions on the remote device can be executed via remote procedure calls.
    Type: Grant
    Filed: November 25, 2003
    Date of Patent: February 12, 2008
    Assignee: Microsoft Corporation
    Inventors: George Chu, Timothy Y. Ng
  • Publication number: 20060280769
    Abstract: Methods of sterilizing dermal fillers and injectable collagen material have been developed which reduce the level of active biological contaminants or pathogens without adversely affecting the material, i.e., wherein the dermal fillers and injectable collagen material retain their same properties before and after its terminal sterilization. In one embodiment the method for sterilizing the dermal filler or injectable collagen material that is sensitive to radiation contains the steps of protecting the filler or material from radiation, and irradiating the filler or material with a suitable dose of radiation for a time and at a rate effective to sterilize the filler or injectable material. In a preferred embodiment the method for sterilizing the dermal filler or injectable collagen material that is sensitive to radiation includes the steps of a) freezing the filler or material at a temperature below its freezing temperature, which is generally below 0° C.
    Type: Application
    Filed: May 17, 2006
    Publication date: December 14, 2006
    Inventors: George Chu, C. Harrell, Hector Gomez
  • Publication number: 20060210602
    Abstract: Crosslinkable compositions are provided that readily crosslink in situ to provide biocompatible, nonimmunogenic crosslinked materials that may be used as adhesive compositions. The compositions comprise collagen and a plurality of crosslinkable components having reactive functional groups thereon, with the functional groups selected so as to enable inter-reaction between the components, i.e., crosslinking. Methods for preparing and using the compositions are also provided. Exemplary uses include tissue augmentation, biologically active agent delivery, bioadhesion, prevention of adhesions following surgery or injury, and coating of surgically acceptable patches and solid implants, the latter including sutures.
    Type: Application
    Filed: January 31, 2006
    Publication date: September 21, 2006
    Inventors: Louis Sehl, Olof Trollsas, Donald Wallace, David Toman, Frank DeLustro, Jacqueline Schroeder, George Chu
  • Publication number: 20050114644
    Abstract: Software running on a desktop device determines whether or not binaries (executables) need to be pushed to a remote device. If binaries need to be pushed to the remote device, the desktop determines which particular binaries need to be pushed to the remote device, and pushes the needed binaries to the remote device. Once all needed binaries are loaded onto the remote device, functions on the remote device can be executed via remote procedure calls.
    Type: Application
    Filed: November 25, 2003
    Publication date: May 26, 2005
    Inventors: George Chu, Timothy Ng.
  • Publication number: 20050054771
    Abstract: A method of tissue repair is provided using a biocompatible nonimmunogenic adhesive composition. The adhesive composition comprises collagen and a plurality of crosslinkable components having reactive functional groups thereon, with the functional groups selected so as to enable inter-reaction between the components, i.e., crosslinking. Kits for use in carrying out the method of the invention are also provided, as are pretreated surgically acceptable patches that have been coated with the aforementioned adhesive composition.
    Type: Application
    Filed: October 22, 2004
    Publication date: March 10, 2005
    Inventors: Louis Sehl, Olof Trollsas, Donald Wallace, David Toman, Frank DeLustro, Jacqueline Schroeder, George Chu
  • Publication number: 20050004584
    Abstract: The invention relates to anastomosis stents and plugs comprised of a non-polyglycolic acid material that is resorbable by the patient in about a few minutes up to about 90 days. Such stents and plugs may be employed in surgical techniques wherein tissue is joined at an interface without need for sutures, optionally through use of a tissue sealant. As a result, interfacial tensile strengths of at least about 1.3N/cm2 may be achieved.
    Type: Application
    Filed: May 4, 2004
    Publication date: January 6, 2005
    Applicant: Cohesion Technologies, Inc.
    Inventors: Kenneth Franco, George Chu, Frank DeLustro, George Daniloff
  • Patent number: 6829262
    Abstract: A process evaluates an aging property of a distributed Bragg reflector (DBR) laser. The process includes illuminating a Bragg grating of the distributed Bragg reflector (DBR) laser with light while the DBR laser is both supplied a tuning current and not lasing. The process also includes performing an action to the DBR laser responsive to a wavelength of a Bragg peak in a portion of the light reflected by the Bragg grating and a value of the tuning current supplied during the illuminating.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: December 7, 2004
    Assignee: Tri Quint Technology Holding Co.
    Inventors: David Alan Ackerman, Sung-Nee George Chu, Eric J Dean, John Evan Johnson, Leonard Jan-Peter Ketelsen, Liming Zhang
  • Patent number: 6556604
    Abstract: The RT regions of an ISB light emitter comprise pre-biased SLs and a multiplicity of split quantum wells (SPQWs). A SPQW is a quantum well that is divided into a multiplicity of sub-wells by a first barrier layer sufficiently thin that the upper and lower energy states are split beyond their natural broadening and contribute to different minibands in each RT region. In contrast, adjacent SPQWs are coupled to one another by second barrier layers. The thicknesses of the latter layers are chosen so that minibands are created across each RT region. In one embodiment, the emitter includes an I/R region between adjacent RT regions, and in another embodiment the I/R regions are omitted.
    Type: Grant
    Filed: November 8, 2000
    Date of Patent: April 29, 2003
    Assignee: Lucent Technologies Inc.
    Inventors: Federico Capasso, Alfred Yi Cho, Sung-Nee George Chu, Claire F. Gmachl, Albert Lee Hutchinson, Arthur Mike Sergent, Deborah Lee Sivco, Alessandro Tredicucci, Michael Clement Wanke
  • Publication number: 20020096675
    Abstract: An intersubband (ISB) optical device comprises first quantum well (QW) interior regions having upper and lower energy states between which ISB transitions take place; and superlattice (SL) barrier regions interposed between the first QW interior regions. The SL barrier regions include second barriers and second QW interior regions, with the second QW interior regions being interposed between the second barrier regions. The first QW interior regions and the SL barrier regions are configured to produce an energy gap between the upper and lower states that is larger than the energy of a 1.7 &mgr;m wavelength photon. In accordance with another aspect of our invention, an intersubband optical device comprises a core region that includes a multiplicity of repeat units (RUs), each RU including a first barrier region and a QW active region disposed adjacent thereto, characterized in that (1) each of the QWs has upper and lower energy states separated by an energy greater than that of a 1.
    Type: Application
    Filed: September 7, 2001
    Publication date: July 25, 2002
    Inventors: Alfred Yi Cho, Sung-Nee George Chu, Claire F. Gmachl, Hock Min Ng
  • Patent number: 6400744
    Abstract: An article comprising a QC-DFB laser is disclosed. In the QC-DFB laser, an overlying grating structure achieves relatively strong coupling of the guided mode to the grating, and is thus highly effective in inducing single-mode operation even under cw operating conditions. The grating structure includes grooves etched in a plasmon-enhanced confinement layer (PECL) disposed adjacent and in contact with an upper metallic electrode. The grating structure and the PECL are designed such that in the grooves, the laser mode travelling in the waveguide can couple efficiently to the surface-plasmon at the electrode interface. This results in strong modulation of the laser mode, leading to strong modulation of, inter alia, the effective refractive index.
    Type: Grant
    Filed: February 25, 2000
    Date of Patent: June 4, 2002
    Assignee: Lucent Technologies, Inc.
    Inventors: Federico Capasso, Alfred Yi Cho, Sung-Nee George Chu, Claire F. Gmachi, Ruedeger Koehler, Deborah Lee Sivco, Alessandro Tredicucci