Patents by Inventor David Cheung

David Cheung 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: 9445275
    Abstract: Methods and apparatus for mitigation of radio interference between two or more wireless concurrently operating interfaces in a wireless device having an aggressive form factor. In one embodiment, the interfaces are used for different tasks (e.g., WLAN for data and PAN for human interface devices), and the device includes logic configured to evaluate the priority of the tasks and adjust the operation of one or more of the interfaces accordingly.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: September 13, 2016
    Assignee: Apple Inc.
    Inventors: Camille Chen, David Cheung, Hsin-Yao Chen, Michael J. Giles, Christopher B. Zimmermann
  • Patent number: 9411656
    Abstract: A network device includes a plurality of blades, each having a plurality of CPU cores that process requests received by the network device. Each blade further includes an accumulator circuit. Each accumulator circuit periodically aggregates the local counter values of the CPU cores of the corresponding blade. One accumulator circuit is designated as a master, and the other accumulator circuit(s) are designated as slave(s). The slave accumulator circuits transmit their aggregated local counter values to the master accumulator circuit. The master accumulator circuit aggregates the sets of aggregated local counter values to create a set of global counter values. The master accumulator circuit transmits the global counter values to a management processor (for display), to the CPU cores located on its corresponding blade, and to each of the slave accumulator circuits. Each slave accumulator circuit then transmits the global counter values to the CPU cores located on its corresponding blade.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: August 9, 2016
    Assignee: Brocade Communications Systems, Inc.
    Inventors: Avinash Jindal, Deepak Bansal, Sam Htin Moy, David Cheung, Bing Wang, Mani Kancherla, Sridhar Devarapalli
  • Patent number: 9397011
    Abstract: Systems and methods for reducing copper contamination in a substrate processing system include performing a plasma process on a substrate in a processing chamber of a substrate processing system. A component is located in the processing chamber and is made of an alloy including copper. The plasma process uses a process gas mixture including molecular hydrogen. Prior to performing the plasma process on the substrate and before the substrate is arranged in the processing chamber, the component is conditioned in the processing chamber using a conditioning plasma process that includes a process gas mixture including molecular oxygen and forming gas.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: July 19, 2016
    Assignee: Lam Research Corporation
    Inventors: Haoquan Fang, Yuk-Hong Ting, David Cheung
  • Publication number: 20160063259
    Abstract: A system for use with a computer is provided, the computer including a self-encrypting drive (SED), the SED including a nominal space and a pre-boot region, wherein the nominal space can be locked to prevent access to the nominal space. The system includes SED management software configured to be loaded in the pre-boot region of the SED. The SED management software includes a pre-boot operating system (OS) and an unlocking program. The unlocking program is configured (a) to execute within the pre-boot OS, and (b) upon successful authentication of a user, to unlock the nominal space of the SED. Other embodiments are described and claimed.
    Type: Application
    Filed: October 29, 2015
    Publication date: March 3, 2016
    Applicant: SOFTEX INCORPORATED
    Inventors: Apurva M. Bhansali, Mehul R. Patel, Kamal M. Dhanani, Rajnish S. Chauhan, David Cheung
  • Publication number: 20160063256
    Abstract: A system for use with a computer is provided, the computer including a self-encrypting drive (SED), the SED including a nominal space and a pre-boot region, wherein the nominal space can be locked to prevent access to the nominal space. The system includes SED management software configured to be loaded in the pre-boot region of the SED. The SED management software includes a pre-boot operating system (OS) and an unlocking program. The unlocking program is configured (a) to execute within the pre-boot OS, and (b) upon successful authentication of a user, to unlock the nominal space of the SED. Other embodiments are described and claimed.
    Type: Application
    Filed: October 29, 2015
    Publication date: March 3, 2016
    Applicant: SOFTEX INCORPORATED
    Inventors: Apurva M. Bhansali, Mehul R. Patel, Kamal M. Dhanani, Rajnish S. Chauhan, David Cheung
  • Patent number: 9274851
    Abstract: Techniques for providing core-based virtualization based upon cores provided by one or more processors of a system. A device such as a network device comprising multiple processor cores provides for core-based virtualization. According to one embodiment, a network device is provided comprising a first subsystem for processing packets received by the network device. The first subsystem may comprise a set of one or more processors, the one or more processors providing a plurality of cores. Each core in the plurality of cores may have associated memory resources.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: March 1, 2016
    Assignee: Brocade Communications Systems, Inc.
    Inventors: David Cheung, Mani Prasad Kancherla, Deepak Kothari, Gary Hemminger
  • Patent number: 9270566
    Abstract: Embodiments described herein discuss an approach to implementing load-balancing across multiple monitoring servers. One such embodiment describes a network monitoring device. The network monitoring device includes an ingress port, for receiving mirrored network packets, and a number of egress ports. The egress ports are associated with a number of monitoring servers, and used to forward the mirrored network packets to the monitoring servers. A packet classifier, coupled to the ingress port, examines the mirrored network packets, and determines which of the monitoring servers should receive the packets.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: February 23, 2016
    Assignee: Brocade Communications Systems, Inc.
    Inventors: Bing Wang, David Cheung
  • Publication number: 20150357202
    Abstract: Methods and apparatus for treating an organic film such as photoresist with a hydroxyl-generating compound prior to removing the organic film from a substrate are provided. Treatments include exposure to one or more of hydrogen peroxide vapor and water vapor in a non-plasma environment. In some implementations, conditions are such that condensation on the surface is suppressed. Methods include treating high-dose ion-implantation photoresists and post-plasma doping photoresists with little or no material loss and permit mild plasma removal of the photoresist after treatment.
    Type: Application
    Filed: June 10, 2014
    Publication date: December 10, 2015
    Inventors: Bayu Atmaja Thedjoisworo, Bradley Jon Jacobs, Ivan Berry, David Cheung
  • Patent number: 9209000
    Abstract: Systems, system components, and methods for plasma stripping are provided. In an embodiment, a gas flow distribution receptacle may have a rounded section that includes an inner surface defining a reception cavity, an outer surface forming an enclosed end, and a centerpoint on the outer surface having a longitudinal axis extending therethrough and through the reception cavity. First and second rings of openings provide flow communication with the plasma chamber. The second ring of openings are disposed between the first ring and the centerpoint, and each opening of the second ring of openings extends between the inner and outer surfaces at a second angle relative to the longitudinal axis that is less than the first angle and has a diameter that is substantially identical to a diameter of an adjacent opening and smaller than the diameters of an opening of the first ring of openings.
    Type: Grant
    Filed: January 3, 2012
    Date of Patent: December 8, 2015
    Assignee: Novellus Systems, Inc.
    Inventors: Huatan Qiu, Woody Chung, Anirban Guha, David Cheung
  • Patent number: 9202059
    Abstract: A system for use with a computer is provided, the computer including a self-encrypting drive (SED), the SED including a nominal space and a pre-boot region, wherein the nominal space can be locked to prevent access to the nominal space. The system includes SED management software configured to be loaded in the pre-boot region of the SED. The SED management software includes a pre-boot operating system (OS) and an unlocking program. The unlocking program is configured (a) to execute within the pre-boot OS, and (b) upon successful authentication of a user, to unlock the nominal space of the SED. Other embodiments are described and claimed.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: December 1, 2015
    Inventors: Apurva M. Bhansali, Mehul R. Patel, Kamal M. Dhanani, Rajnish S. Chauhan, David Cheung
  • Publication number: 20150335432
    Abstract: A surgically implantable containment member for maintaining a bone augmentation material in a desired location and/or configuration following implantation in a human or other mammalian patient, in which the containment member is made of a natural membrane, such as pericardium, isolated from an animal donor and processed to avoid inflammation or tissue rejection, and a method of bone augmentation using such a containment member. In a particularly preferred embodiment, the containment member has a window which rapidly dissipates upon exposure to bodily fluids after implantation to expose bone augmentation material contained within the containment member to an adjacent bone to be augmented.
    Type: Application
    Filed: February 11, 2013
    Publication date: November 26, 2015
    Inventor: David CHEUNG
  • Publication number: 20150332933
    Abstract: Improved methods for stripping photoresist and removing ion implant related residues from a work piece surface are provided. According to various embodiments, plasma is generated using elemental hydrogen, a fluorine-containing gas and a protectant gas. The plasma-activated gases reacts with the high-dose implant resist, removing both the crust and bulk resist layers, while simultaneously protecting exposed portions of the work piece surface. The work piece surface is substantially residue free with low silicon loss.
    Type: Application
    Filed: May 26, 2015
    Publication date: November 19, 2015
    Inventors: David Cheung, Haoquan Fang, Jack Kuo, Ilia Kalinovski, Zhao Li, Andrew Yao, Anirban Guha, Kirk Ostrowski
  • Publication number: 20150257011
    Abstract: Methods and apparatus for mitigation of radio interference between two or more wireless concurrently operating interfaces in a wireless device having an aggressive form factor. In one embodiment, the interfaces are used for different tasks (e.g., WLAN for data and PAN for human interface devices), and the device includes logic configured to evaluate the priority of the tasks and adjust the operation of one or more of the interfaces accordingly.
    Type: Application
    Filed: March 23, 2015
    Publication date: September 10, 2015
    Inventors: Camille Chen, David Cheung, Hsin-Yao Chen, Michael J. Giles, Christopher B. Zimmermann
  • Patent number: 9034773
    Abstract: Provided are methods and systems for removing a native silicon oxide layer on a wafer. In a non-sequential approach, a wafer is provided with a native silicon oxide layer on a polysilicon layer. An etchant including a hydrogen-based species and a fluorine-based species is introduced, exposed to a plasma, and flowed onto the wafer at a relatively low temperature. The wafer is then heated to a slightly elevated temperature to substantially remove the native oxide layer. In a sequential approach, a wafer is provided with a native silicon oxide layer. A first etchant including a hydrogen-based species and a fluorine-based species is flowed onto the wafer. Then the wafer is heated to a slightly elevated temperature, a second etchant is flowed towards the wafer, and the second etchant is exposed to a plasma to complete the removal of the native silicon oxide layer and to initiate removal of another layer such as a polysilicon layer.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: May 19, 2015
    Assignee: Novellus Systems, Inc.
    Inventors: Bayu Thedjoisworo, David Cheung, Joon Park
  • Patent number: 8995553
    Abstract: Methods and apparatus for mitigation of radio interference between two or more wireless concurrently operating interfaces in a wireless device having an aggressive form factor. In one embodiment, the interfaces are used for different tasks (e.g., WLAN for data and PAN for human interface devices), and the device includes logic configured to evaluate the priority of the tasks and adjust the operation of one or more of the interfaces accordingly.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: March 31, 2015
    Assignee: Apple Inc.
    Inventors: Camille Chen, David Cheung, Hsin-Yao Chen, Michael J. Giles, Christopher B. Zimmermann
  • Publication number: 20150075718
    Abstract: Embodiments of a plasma generator apparatus for ashing a work piece are provided. The apparatus includes a container adapted for continuous gas flow there through from an inlet end to an outlet end thereof. The container is fabricated of a dielectric material and adapted for ionization therein of a portion of at least one component of gas flowing therethrough. A gas flow distributor is configured to direct gas flow to a region within the container and a coil surrounds at least a portion of side walls of the container adjacent the region of the container to which the gas flow distributor directs gas flow. A radio frequency generator is coupled to the coil.
    Type: Application
    Filed: September 15, 2014
    Publication date: March 19, 2015
    Inventors: James A. Fair, Vincent Decaux, Anirban Guha, David Cheung, John Keller, Peter Jagusch
  • Publication number: 20150075715
    Abstract: Provided are methods and systems for removing polysilicon on a wafer. A wafer can include a polysilicon layer and an exposed nitride and/or oxide structure. An etchant with a hydrogen-based species, such as hydrogen gas, and a fluorine-based species, such as nitrogen trifluoride, can be introduced. The hydrogen-based species and the fluorine-based species can be activated with a remote plasma source. The layer of polysilicon on the wafer can be removed at a selectivity over the exposed nitride and/or oxide structure that is greater than about 500:1.
    Type: Application
    Filed: November 19, 2014
    Publication date: March 19, 2015
    Inventors: Bayu Thedjoisworo, Jack Kuo, David Cheung, Joon Park
  • Patent number: 8916477
    Abstract: Provided are methods and systems for removing polysilicon on a wafer. A wafer can include a polysilicon layer and an exposed nitride and/or oxide structure. An etchant with a hydrogen-based species, such as hydrogen gas, and a fluorine-based species, such as nitrogen trifluoride, can be introduced. The hydrogen-based species and the fluorine-based species can be activated with a remote plasma source. The layer of polysilicon on the wafer can be removed at a selectivity over the exposed nitride and/or oxide structure that is greater than about 500:1.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: December 23, 2014
    Assignee: Novellus Systems, Inc.
    Inventors: Bayu Thedjoisworo, Jack Kuo, David Cheung, Joon Park
  • Patent number: 8864935
    Abstract: Embodiments of a plasma generator apparatus for ashing a work piece are provided. The apparatus includes a container adapted for continuous gas flow there through from an inlet end to an outlet end thereof. The container is fabricated of a dielectric material and adapted for ionization therein of a portion of at least one component of gas flowing therethrough. A gas flow distributor is configured to direct gas flow to a region within the container and a coil surrounds at least a portion of side walls of the container adjacent the region of the container to which the gas flow distributor directs gas flow. A radio frequency generator is coupled to the coil.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: October 21, 2014
    Assignee: Novellus Systems, Inc.
    Inventors: James A. Fair, Vincent Decaux, Anirban Guha, David Cheung, John Keller, Peter Jagusch
  • Patent number: 8856421
    Abstract: A multi-processor architecture for a network device that includes a plurality of barrel cards, each including: a plurality of processors, a PCIe switch coupled to each of the plurality of processors, and packet processing logic coupled to the PCIe switch. The PCIe switch on each barrel card provides high speed flexible data paths for the transmission of incoming/outgoing packets to/from the processors on the barrel card. An external PCIe switch is commonly coupled to the PCIe switches on the barrel cards, as well as to a management processor, thereby providing high speed connections between processors on separate barrel cards, and between the management processor and the processors on the barrel cards.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: October 7, 2014
    Assignee: Brocade Communications Systems, Inc.
    Inventors: Mehrdad Hamadani, Deepak Bansal, Sam Htin Moy, Steenivasulu Malli, David Cheung, Mani Kancherla, Sridhar Devarapalli