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).

  • Publication number: 20120298770
    Abstract: A fragrance emitting apparatus for connection to a USB port. The fragrance emitting apparatus has a casing having an interior and a fragrance bottle removably disposed within the interior of the casing. The fragrance bottle contains a liquid that provides a desired fragrance. The fragrance bottle has a fragrance member that has a first portion within the fragrance bottle, a second portion extending from the fragrance bottle and is configured to absorb liquid in the fragrance bottle. A micro-pump device is positioned within the interior of the casing and has an oscillating member that contacts the second portion of the fragrance member. A control circuit controls generates an electrical wave signal to cause the oscillating member to vibrate so as to diffuse fragrance liquid that contacts the oscillating member so as to produce a fragrance. The fragrance exits a vent in the casing.
    Type: Application
    Filed: November 27, 2011
    Publication date: November 29, 2012
    Inventor: David Cheung
  • Publication number: 20120254602
    Abstract: Methods, systems, and apparatuses for a self-encrypting drive (SED) management system configured to be loaded in a pre-boot region of an SED-based computer, the SED of the SED-based computer having a nominal space, which may be encrypted when the SED-based computer is shut down, and the pre-boot region. The SED management system comprises a pre-boot operating system (OS); at least one pre-boot library configured to support the pre-boot OS; and an unlocking software program configured to work with the pre-boot OS to transfer control directly to an operating system of the nominal space upon a successful authentication. Other embodiments are described and claimed.
    Type: Application
    Filed: March 1, 2012
    Publication date: October 4, 2012
    Applicant: SOFTEX INCORPORATED
    Inventors: Apurva M. Bhansali, Mehul R. Patel, Kamal M. Dhanani, Rajnish S. Chauhan, David Cheung
  • Publication number: 20120247674
    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: June 11, 2012
    Publication date: October 4, 2012
    Inventors: James A. Fair, Vincent Decaux, Anirban Guha, David Cheung, John Keller, Peter Jagusch
  • Publication number: 20120211473
    Abstract: Plasma is generated using elemental hydrogen, a weak oxidizing agent, and a fluorine containing gas. An inert gas is introduced to the plasma downstream of the plasma source and upstream of a showerhead that directs gas mixture into the reaction chamber where the mixture reacts with the high-dose implant resist. The process removes both the crust and bulk resist layers at a high strip rate, and leaves the work piece surface substantially residue free with low silicon loss.
    Type: Application
    Filed: May 2, 2012
    Publication date: August 23, 2012
    Inventors: Haruhiro Harry Goto, David Cheung
  • Patent number: 8248928
    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: November 8, 2007
    Date of Patent: August 21, 2012
    Assignee: Foundry Networks, LLC
    Inventors: Bing Wang, David Cheung
  • Publication number: 20120141707
    Abstract: A biocompatible, resorbable biphasic collagen membrane having a first area of relatively higher tensile strength and stiffness and lower porosity and a second area of relatively lower tensile strength and stiffness and higher porosity, and a method of manufacturing the such a membrane.
    Type: Application
    Filed: February 5, 2010
    Publication date: June 7, 2012
    Applicant: Osseous Technologies of America
    Inventors: David Cheung, William Knox, Jay Malmquist, Edwin Shors, Dennis Smiler
  • Patent number: 8193096
    Abstract: Plasma is generated using elemental hydrogen, a weak oxidizing agent, and a fluorine containing gas. An inert gas is introduced to the plasma downstream of the plasma source and upstream of a showerhead that directs gas mixture into the reaction chamber where the mixture reacts with the high-dose implant resist. The process removes both the crust and bulk resist layers at a high strip rate, and leaves the work piece surface substantially residue free with low silicon loss.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: June 5, 2012
    Assignee: Novellus Systems, Inc.
    Inventors: Haruhiro Harry Goto, David Cheung
  • Publication number: 20120135376
    Abstract: A biocompatible, resorbable collagen membrane having a wedge shape with a thick edge of relatively higher strength and rigidity and a thin edge of relatively higher deformability and elasticity, which membrane is bendable to a desired configuration and is sufficiently rigid to retain the bent configuration upon implantation at a surgical site; a method of making such a membrane, and the use of such a membrane in a “sinus lift” procedure for augmenting alveolar bone.
    Type: Application
    Filed: March 30, 2010
    Publication date: May 31, 2012
    Applicant: Osseous Technologies of America
    Inventors: David Cheung, Edwin Shors, William Knox
  • Publication number: 20120097331
    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: Application
    Filed: January 3, 2012
    Publication date: April 26, 2012
    Applicant: NOVELLUS SYSTEMS, INC.
    Inventors: Huatan Qiu, Woody Chung, Anirban Guha, David Cheung
  • Patent number: 8129281
    Abstract: A method of cleaning a low dielectric constant film in a lithographic process includes providing a dielectric film having thereover a resist composition, the dielectric film having a dielectric constant no greater than about 4.0, and stripping the resist composition to leave a substantially silicon-containing ash residue on the dielectric film. The method then includes contacting the ash residue with plasma comprising an ionized, essentially pure noble gas such as helium to remove the resist residue without substantially affecting the underlying dielectric film.
    Type: Grant
    Filed: May 12, 2005
    Date of Patent: March 6, 2012
    Assignee: Novellus Systems, Inc.
    Inventors: David Cheung, Kirk J Ostrowski
  • Patent number: 8110068
    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: March 20, 2008
    Date of Patent: February 7, 2012
    Assignee: Novellus Systems, Inc.
    Inventors: Huatan Qiu, Woody Chung, Anirban Guha, David Cheung
  • Patent number: 8068725
    Abstract: A fragrance emitting apparatus for connection to a USB port. In one embodiment, the fragrance emitting apparatus comprises a casing having an interior and at least one vent in communication with the interior, a cover removably attached to the casing to provide access to the interior, and a fragrance bottle removably disposed within the interior of the casing and having therein a liquid that provides a desired fragrance. The fragrance bottle further comprises a fragrance member having a first portion within fragrance bottle and a second portion extending from the fragrance bottle. The fragrance member is configured to absorb liquid in the fragrance bottle. The apparatus further comprises a micro-pump device positioned within the interior of the casing and adjacent to the second portion of the fragrance member. The micro-pump device has an oscillating member that contacts the second portion of the fragrance member.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: November 29, 2011
    Inventor: David Cheung
  • Patent number: 8032014
    Abstract: A fragrance emitting apparatus (20) for connection to a USB port. In one embodiment, the fragrance emitting apparatus (20) comprises a casing (22) having an interior and a fragrance vent (36A, 36B) in communication with the interior, a heating element (42) located within the casing (22) that generates heat when electrical power is applied thereto, a USB connector (28) connected to the casing (22) and electrically connected to the heating element (42) so as to provide electrical power to the heating element (42) when the USB connector (28) is connected to a USB port, and a stationary fragrance member (50) located within the casing (22) to provide a fragrance, scent or aroma when heat is applied to the fragrance member (50). The fragrance member (50) is proximate to the heating element (42) so that heat generated by the heating element (42) causes the fragrance member (50) to emit a fragrance, scent or aroma which exits the interior of the casing (22) through the vent (36A, 36B).
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: October 4, 2011
    Inventor: David Cheung
  • Publication number: 20110223232
    Abstract: The invention is generally directed to a drug-release composition that contains drug-linker-drug compound that is combined with another therapeutic agent that can be an antirestenotic agent. The therapeutic agent can be partially bound to the drug-linker-drug compound, miscible with the drug-linker-drug compound, combined with the drug-linker-drug compound at various ratios, and tuned to control the release of drugs to a tissue in need thereof.
    Type: Application
    Filed: October 23, 2007
    Publication date: September 15, 2011
    Inventors: Olexander Hnojewyj, Patrick Rivelli, JR., Tony B. Shaffer, David Cheung
  • Publication number: 20110211442
    Abstract: A virtual router spans a number of physical routing devices. A set of physical ports on one of the physical routing devices is logically represented as a trunk. A respective port priority value is associated with each of those ports, and a device priority value is associated with the physical routing device. If a port in the trunk is out-of-service, then the device priority value can be adjusted by the port priority value associated with the out-of-service port. A corrective action can be implemented if the device priority value fails to satisfy a condition. For example, the physical routing device may failover to another one of the physical routing devices spanned by the virtual router.
    Type: Application
    Filed: April 27, 2011
    Publication date: September 1, 2011
    Inventors: David CHEUNG, Xiaohong PAN
  • Publication number: 20110139176
    Abstract: Improved methods for stripping photoresist and removing etch-related residues from dielectric materials are provided. In one aspect of the invention, methods involve removing material from a dielectric layer using a hydrogen-based etch process employing a weak oxidizing agent and fluorine-containing compound. Substrate temperature is maintained at a level of about 160° C. or less, e.g., less than about 90° C.
    Type: Application
    Filed: December 11, 2009
    Publication date: June 16, 2011
    Inventors: David Cheung, Ted Li, Anirban Guha, Kirk Ostrowski
  • Publication number: 20110143548
    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: December 11, 2009
    Publication date: June 16, 2011
    Inventors: David Cheung, Haoquan Fang, Jack Kuo, Ilia Kalinovski, Ted Li, Andrew Yao, Anirban Guha, Kirk Ostrowski
  • Publication number: 20110139175
    Abstract: Improved methods and apparatus for stripping photoresist and removing ion implant related residues from a work piece surface are provided. According to various embodiments, the workpiece is exposed to a passivation plasma, allowed to cool for a period of time, and then exposed to an oxygen-based or hydrogen-based plasma to remove the photoresist and ion implant related residues. Aspects of the invention include reducing silicon loss, leaving little or no residue while maintaining an acceptable strip rate. In certain embodiments, methods and apparatus remove photoresist material after high-dose ion implantation processes.
    Type: Application
    Filed: December 8, 2010
    Publication date: June 16, 2011
    Inventors: David Cheung, Haoquan Fang, Jack Kuo, Ilia Kalinovski, Ted Li, Andrew Yao
  • Publication number: 20110126196
    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.
    Type: Application
    Filed: November 25, 2009
    Publication date: May 26, 2011
    Applicant: Brocade Communications Systems, Inc.
    Inventors: David Cheung, Mani Prasad Kancherla, Deepak Kothari, Gary Hemminger
  • Patent number: 7936666
    Abstract: A virtual router spans a number of physical routing devices. A set of physical ports on one of the physical routing devices is logically represented as a trunk. A respective port priority value is associated with each of those ports, and a device priority value is associated with the physical routing device. If a port in the trunk is out-of-service, then the device priority value can be adjusted by the port priority value associated with the out-of-service port. A corrective action can be implemented if the device priority value fails to satisfy a condition. For example, the physical routing device may failover to another one of the physical routing devices spanned by the virtual router.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: May 3, 2011
    Assignee: Foundry Networks, LLC
    Inventors: David Cheung, Xiaohong Pan