Patents by Inventor Haibin Zhang

Haibin Zhang 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: 8270788
    Abstract: The invention relates to devices having periodic refractive index modulation structures and fabrication methods for the devices using a laser means. By focusing a pulsed laser beam into a transparent material substrate, a path of laser modified volumes can be formed with modified refractive index compared with the unprocessed material. By selecting appropriate laser parameters and relative scan speed, the laser modified path defines an optical waveguide. Separation distance of the individual modified volumes define a periodic modification pattern along the waveguide path, so that the waveguide structures also exhibit grating responses, for example, as spectral filters, Bragg reflectors, grating couplers, grating sensors, or other devices.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: September 18, 2012
    Inventors: Peter R. Herman, Haibin Zhang
  • Publication number: 20120225658
    Abstract: The invention relates to a system and method for updating a neighbour cell list of a wireless access node. User terminals to be to be transferred from a first wireless access node of a first wireless access network to a second wireless access node of a second wireless access network are detected. From the first wireless access node, one or more of the detected user terminals are requested to report cell information of a plurality of wireless access nodes of at least one of the first wireless access network and the second wireless access network. The cell information is received from the one or more of the detected user terminals and at least one of the first neighbour cell list and the second neighbour cell list is updated using the received cell information.
    Type: Application
    Filed: October 5, 2010
    Publication date: September 6, 2012
    Applicants: NEDERLANDSE ORGANISATIE VOOR TOEGEPAST- NATUURWETENSCHAPPELIJK ONDERZOEK, KONINKLIJKE KPN N.V.
    Inventors: Job Cornelis Oostveen, Ljupco Jorguseski, Remco Litjens, Adrian Victor Pais, Haibin Zhang
  • Publication number: 20120108245
    Abstract: The invention relates to cooperation between first and second wireless access networks that can be used to obtain energy reduction for or traffic routing within the overall telecommunications infrastructure while still enabling acceptable network coverage and satisfactory performance by the telecommunications infrastructure as a whole. The cooperation refers to the fact that the wireless access networks provide duplicate coverage in a particular area when both wireless access networks are active, and that traffic can be switched between the cooperating networks in order to temporarily adjust (e.g. switch off) resources of one or the wireless access networks. In this manner, energy reduction and/or traffic routing can be obtained under the constraint that sufficient service coverage and capacity remains at an acceptable quality.
    Type: Application
    Filed: July 9, 2010
    Publication date: May 3, 2012
    Applicants: Nederlandse Organisatie Voor Toegepast-Natuurweten -schappelijk Onderzoek TNO, KONINKLIJKE KPN N.V.
    Inventors: Haibin Zhang, Job Cornelis Oostveen, Ljupco Jorguseski, Remco Litjens, Adrian Victor Pais
  • Publication number: 20120076216
    Abstract: A stream of information is communicated by means of transmission distributed over a plurality of transmission antennas and reception distributed over a plurality of reception antennas. In the method the stream is encoded according to an error correcting code, into a series of multi-bit symbols. A sequence of the multi-bit symbols is interleaved, by which symbols are assigned to time slots, so that the multiple bits of the symbols remain together in the same time slot. The interleaved multi-bit symbols are transmitted, with each symbol distributed over the transmission antennas in a respective time slot. Signals received at the reception antennas in each respective time slot are received and demodulated, to produce demodulation results each for a respective time slot. A time-slot sequence of the demodulation results is deinterleaved. Decoded symbol values are selected under a constraint that a series of the selected symbols belongs to the error correcting code.
    Type: Application
    Filed: March 15, 2010
    Publication date: March 29, 2012
    Applicant: Nederlandse Organisatie Voor Toegepast- Natuurwetenschappelijk Onderzoek TNO
    Inventor: Haibin Zhang
  • Publication number: 20120039567
    Abstract: The present invention provides a direct laser writing fabrication method and system for devices having periodic refractive index modulation structures, for example, Bragg gratings. By focusing a modulated pulsed laser beam into a transparent material substrate, a path of laser modified volumes can be formed with modified refractive index compared with the unprocessed material. Modulation of exposure conditions provides periodic or modified periodic waveguide structures such that the waveguide structures exhibit grating responses and can be used for a variety of optical applications, for example, as spectral filters, Bragg reflectors, grating couplers, grating sensors, or other devices.
    Type: Application
    Filed: March 14, 2008
    Publication date: February 16, 2012
    Inventors: Peter R. Herman, Haibin Zhang, Shane Michael Eaton
  • Publication number: 20110194574
    Abstract: The invention is a method and apparatus for creating a color and optical density selectable visible mark on an anodized aluminum specimen. The method includes providing a laser marking system having a laser, laser optics and a controller operatively connected to said laser to control laser pulse parameters and a controller with stored laser pulse parameters, selecting the stored laser pulse parameters associated with the desired color and optical density, directing the laser marking system to produce laser pulses having laser pulse parameters associated with the desired color and optical density including temporal pulse widths greater than about 1 and less than about 1000 picoseconds to impinge upon said anodized aluminum.
    Type: Application
    Filed: February 11, 2010
    Publication date: August 11, 2011
    Applicant: ELECTRO SCIENTIFIC INDUSTRIES, INC.
    Inventors: Haibin Zhang, Glenn Simenson, Robert Hainsey, David Barsic, Jeffrey Howerton, Wayne Crowther, Patrick Leonard
  • Publication number: 20110193928
    Abstract: Disclosed is a method for creating a mark desired properties on an anodized specimen and the mark itself. The method includes providing a laser marking system having a controllable laser pulse parameters, determining the laser pulse parameters associated with the desired properties and directing the laser marking system to mark the article using the selected laser pulse parameters. Laser marks so made have optical density that ranges from transparent to opaque, white color, texture indistinguishable from the surrounding article and durable, substantially intact anodization. The anodization may also be dyed and optionally bleached to create other colors.
    Type: Application
    Filed: August 30, 2010
    Publication date: August 11, 2011
    Applicant: ELECTRO SCIENTIFIC INDUSTRIES, INC.
    Inventor: Haibin Zhang
  • Publication number: 20110193929
    Abstract: The invention is a method and apparatus for creating marks on an anodized aluminum specimen with selectable color and optical density. The method includes providing a laser marking system having a laser, laser optics and a controller operatively connected to said laser to control laser pulse parameters. The laser marking system is directed to produce laser pulses having laser pulse parameters associated with the desired color and optical density in the presence of a fluid directed to the surface of the anodized aluminum specimen while marking.
    Type: Application
    Filed: August 30, 2010
    Publication date: August 11, 2011
    Applicant: ELECTRO SCIENTIFIC INDUSTRIES, INC.
    Inventors: Haibin Zhang, Glenn Simenson, Patrick Leonard
  • Patent number: 7977213
    Abstract: A solution to failure mechanisms caused by mechanical sawing of a mechanical semiconductor workpiece entails use of a laser beam to cut and remove the electrically conductive and low-k dielectric material layers from a dicing street before saw dicing to separate semiconductor devices. A laser beam forms a laser scribe region such as a channel in the electrically conductive and low-k dielectric material layers, the bottom of the channel ending on a laser energy transparent stop layer of silicon oxide lying below all of the electrically conductive and low-k dielectric material layers. The disclosed process entails selection of laser parameters such as wavelength, pulse width, and fluence that cooperate to leave the silicon oxide layer stop layer completely or nearly undamaged. A mechanical saw cuts the silicon oxide layer and all other material layers below it, as well as the substrate, to separate the semiconductor devices.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: July 12, 2011
    Assignee: Electro Scientific Industries, Inc.
    Inventors: Andy E. Hooper, David Barsic, Clint R. Vandergiessen, Haibin Zhang, James N. O'Brien
  • Publication number: 20100098013
    Abstract: Disclosed is a radio communications network (RCN) and a method of allocating a resource in a RCN that is configured to provide to a user device at least a first service type and a second service type in a cell of the radio network. A request for a service requiring the resource is received, and the total number of service requests (actual or predicted) is obtained. It is then determined whether the request is for a service of the first type or the second type. If for the first service type, the resource is allocated to the user only if the total number of requests complies with a first threshold specific for the first service type. If for the second service type, the resource is allocated to the user device only if the total number of requests complies with a second threshold being specific for the second service type.
    Type: Application
    Filed: October 20, 2009
    Publication date: April 22, 2010
    Applicant: KONINKLIJKE KPN N.V.
    Inventors: Ljupco Jorguseski, Haibin Zhang
  • Publication number: 20100025387
    Abstract: Methods, devices, and systems for ultrashort pulse laser processing of optically transparent materials are disclosed, with example applications in scribing, marking, welding, and joining. For example, ultrashort laser pulses create scribe features with one pass of the laser beam across the material, with at least one of the scribe features being formed below the surface of the material. Slightly modifying the ultrashort pulse laser processing conditions produces sub-surface marks. When properly arranged, these marks are clearly visible with correctly aligned illumination. Reflective marks may also be formed with control of laser parameters. A transparent material other than glass may be utilized. A method for welding transparent materials uses ultrashort laser pulses to create a bond through localized heating.
    Type: Application
    Filed: March 4, 2009
    Publication date: February 4, 2010
    Applicant: IMRA AMERICA, INC.
    Inventors: Alan Y. Arai, Gyu C. Cho, Jingzhou Xu, Fumiyo Yoshino, Haibin Zhang, James Bovatsek, Makoto Yoshida
  • Publication number: 20090304331
    Abstract: The invention relates to devices having periodic refractive index modulation structures and fabrication methods for the devices using a laser means. By focusing a pulsed laser beam into a transparent material substrate, a path of laser modified volumes can be formed with modified refractive index compared with the unprocessed material. By selecting appropriate laser parameters and relative scan speed, the laser modified path defines an optical waveguide. Separation distance of the individual modified volumes define a periodic modification pattern along the waveguide path, so that the waveguide structures also exhibit grating responses, for example, as spectral filters, Bragg reflectors, grating couplers, grating sensors, or other devices.
    Type: Application
    Filed: May 18, 2007
    Publication date: December 10, 2009
    Inventors: Peter R. Herman, Haibin Zhang