Patents by Inventor Yizhang Yang

Yizhang Yang 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: 9263426
    Abstract: A PoP (package-on-package) package includes a bottom package coupled to a top package. Terminals on the top of the bottom package are coupled to terminals on the bottom of the top package with an electrically insulating material located between the upper surface of the bottom package and the lower surface of the top package. The bottom package and the top package are coupled during a process that applies force to bring the packages together while heating the packages.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: February 16, 2016
    Assignee: Apple Inc.
    Inventors: Jie-Hua Zhao, Yizhang Yang, Jun Zhai, Chih-Ming Chung
  • Publication number: 20150171063
    Abstract: In some embodiments, a semiconductor device package assembly may include a first substrate. The semiconductor device package assembly may include a first die electrically connected to the first substrate such that the first die is directly bonded to the first substrate. The semiconductor device package assembly may include a second substrate directly bonded to a surface of the first die. The semiconductor device package assembly may include an electronic memory module. The electronic memory module may be directly bonded to the second substrate. The semiconductor device package assembly may include a thermally conductive material directly applied to the electronic memory module. The semiconductor device package assembly may include a heat spreader directly bonded to the thermally conductive material. The heat spreader may function to transfer heat from the first die and the electronic memory module through the heat spreader from the first side to the second side.
    Type: Application
    Filed: February 27, 2014
    Publication date: June 18, 2015
    Applicant: Apple Inc.
    Inventors: Jun Zhai, Yizhang Yang, Mengzhi Pang
  • Publication number: 20150118795
    Abstract: A PoP (package-on-package) package includes a bottom package coupled to a top package. Terminals on the top of the bottom package are coupled to terminals on the bottom of the top package with an electrically insulating material located between the upper surface of the bottom package and the lower surface of the top package. The bottom package and the top package are coupled during a process that applies force to bring the packages together while heating the packages.
    Type: Application
    Filed: January 9, 2015
    Publication date: April 30, 2015
    Inventors: Jie-Hua Zhao, Yizhang Yang, Jun Zhai, Chih-Ming Chung
  • Publication number: 20150117486
    Abstract: In some embodiments, a method may be provided for calibrating integrated circuit temperature sensors. The method may include sensing a first temperature using a first temperature sensor and a second temperature using a second temperature sensor. The first temperature sensor may be calibrated and is external to a package of the integrated circuit. The second temperature sensor may be included in the integrated circuit. The method may include increasing a temperature of the integrated circuit. The method may include allowing the integrated circuit and the package to thermally equilibrate over a first period of time. The method may include sensing a first slope of a temperature decay by the first temperature sensor. The method may include sensing a second slope of a temperature decay by the second temperature sensor. The method may include calibrating the second temperature sensor responsive to a difference between the first and second temperatures and the first and second slopes.
    Type: Application
    Filed: October 30, 2013
    Publication date: April 30, 2015
    Applicant: Apple Inc.
    Inventors: Yizhang Yang, Jun Zhai
  • Patent number: 8963311
    Abstract: A PoP (package-on-package) package includes a bottom package coupled to a top package. Terminals on the top of the bottom package are coupled to terminals on the bottom of the top package with an electrically insulating material located between the upper surface of the bottom package and the lower surface of the top package. The bottom package and the top package are coupled during a process that applies force to bring the packages together while heating the packages.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: February 24, 2015
    Assignee: Apple Inc.
    Inventors: Jie-Hua Zhao, Yizhang Yang, Jun Zhai, Chih-Ming Chung
  • Publication number: 20140084487
    Abstract: A PoP (package-on-package) package includes a bottom package coupled to a top package. Terminals on the top of the bottom package are coupled to terminals on the bottom of the top package with an electrically insulating material located between the upper surface of the bottom package and the lower surface of the top package. The bottom package and the top package are coupled during a process that applies force to bring the packages together while heating the packages.
    Type: Application
    Filed: September 26, 2012
    Publication date: March 27, 2014
    Applicant: APPLE INC.
    Inventors: Jie-Hua Zhao, Yizhang Yang, Jun Zhai, Chih-Ming Chung
  • Patent number: 8635044
    Abstract: Embodiments of systems and methods for improved measurement of transient thermal responses in electronic systems are described herein. Embodiments of the disclosure use the known thermal transfer function of an electronic system to generate an equivalent resistor-capacitor (RC) network having a dynamic response that is identical to a given power excitation as the actual electronic system would have to that power excitation. Using the analogy between thermal and electrical systems, a Foster RC network is constructed, comprising a plurality of RC stages in which resistors and capacitors are connected in parallel. Subsequently, the analog thermal RC network is converted into an infinite impulse response (IIR) digital filter, whose coefficients can be obtained the Z-transform of the analog thermal RC network. This IIR digital filter establishes the recursive relationship between temperature output at the current time step and measured power input at the previous time step.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: January 21, 2014
    Assignees: Advanced Micro Devices, Inc., ATI Technologies ULC
    Inventors: Maxat Touzelbaev, Yizhang Yang, Gamal Refai-Ahmed
  • Publication number: 20120278029
    Abstract: Embodiments of systems and methods for improved measurement of transient thermal responses in electronic systems are described herein. Embodiments of the disclosure use the known thermal transfer function of an electronic system to generate an equivalent resistor-capacitor (RC) network having a dynamic response that is identical to a given power excitation as the actual electronic system would have to that power excitation. Using the analogy between thermal and electrical systems, a Foster RC network is constructed, comprising a plurality of RC stages in which resistors and capacitors are connected in parallel. Subsequently, the analog thermal RC network is converted into an infinite impulse response (IIR) digital filter, whose coefficients can be obtained the Z-transform of the analog thermal RC network. This IIR digital filter establishes the recursive relationship between temperature output at the current time step and measured power input at the previous time step.
    Type: Application
    Filed: April 27, 2011
    Publication date: November 1, 2012
    Inventors: Maxat Touzelbaev, Yizhang Yang, Gamal Refai-Ahmed
  • Publication number: 20120043668
    Abstract: A method of assembling a semiconductor chip device is provided that includes placing an interposer on a first semiconductor chip. The interposer includes a first surface seated on the first semiconductor chip and a second surface adapted to thermally contact a heat spreader. The second surface includes a first aperture. A second semiconductor chip is placed in the first aperture.
    Type: Application
    Filed: August 20, 2010
    Publication date: February 23, 2012
    Inventors: Gamal Refai-Ahmed, Michael Z. Su, Bryan Black, Maxat Touzelbaev, Yizhang Yang
  • Publication number: 20110304051
    Abstract: Various semiconductor chip thermal interface material methods and apparatus are disclosed. In one aspect, a method of establishing thermal contact between a first semiconductor chip and a heat spreader is provided. The method includes placing a thermal interface material layer containing a support structure on the first semiconductor chip. The heat spreader is positioned proximate the thermal interface material layer. The thermal interface material layer is reflowed to establish thermal contact with both the first semiconductor chip and the heat spreader.
    Type: Application
    Filed: August 23, 2011
    Publication date: December 15, 2011
    Inventors: Maxat Touzelbaev, Gamal Refai-Ahmed, Yizhang Yang, Bryan Black
  • Patent number: 8034662
    Abstract: Various semiconductor chip thermal interface material methods and apparatus are disclosed. In one aspect, a method of establishing thermal contact between a first semiconductor chip and a heat spreader is provided. The method includes placing a thermal interface material layer containing a support structure on the first semiconductor chip. The heat spreader is positioned proximate the thermal interface material layer. The thermal interface material layer is reflowed to establish thermal contact with both the first semiconductor chip and the heat spreader.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: October 11, 2011
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Maxat Touzelbaev, Gamal Refai-Ahmed, Yizhang Yang, Bryan Black
  • Patent number: 7848139
    Abstract: A conductive write line of a memory device includes a resistive heating portion for setting and resetting a phase-change material (PCM) storage cell of the device. A dielectric interface extends between the resistive heating portion of the write line and a side of the storage cell, and provides electrical insulation while allowing for thermal coupling between the resistive heating portion and the storage cell. A width of the resistive heating portion of the write line may be less than a width of the storage cell and/or may be less than a width of adjacent portions of the write line, between which the resistive heating portion extends. The side of the storage cell may define a channel of the storage cell through which the write line passes, such that the resistive heating portion is located within the channel.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: December 7, 2010
    Assignee: Seagate Technology LLC
    Inventors: Yizhang Yang, Haiwen Xi, Yiming Shi, Kaizhong Gao, Jun Ouyang, Song S. Xue
  • Publication number: 20100237496
    Abstract: Various semiconductor chip thermal interface material methods and apparatus are disclosed. In one aspect, a method of establishing thermal contact between a first semiconductor chip and a heat spreader is provided. The method includes placing a thermal interface material layer containing a support structure on the first semiconductor chip. The heat spreader is positioned proximate the thermal interface material layer. The thermal interface material layer is reflowed to establish thermal contact with both the first semiconductor chip and the heat spreader.
    Type: Application
    Filed: March 18, 2009
    Publication date: September 23, 2010
    Inventors: Maxat Touzelbaev, Gamal Refai-Ahmed, Yizhang Yang, Bryan Black
  • Publication number: 20100067288
    Abstract: A conductive write line of a memory device includes a resistive heating portion for setting and resetting a phase-change material (PCM) storage cell of the device. A dielectric interface extends between the resistive heating portion of the write line and a side of the storage cell, and provides electrical insulation while allowing for thermal coupling between the resistive heating portion and the storage cell. A width of the resistive heating portion of the write line may be less than a width of the storage cell and/or may be less than a width of adjacent portions of the write line, between which the resistive heating portion extends. The side of the storage cell may define a channel of the storage cell through which the write line passes, such that the resistive heating portion is located within the channel.
    Type: Application
    Filed: September 18, 2008
    Publication date: March 18, 2010
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Yizhang Yang, Haiwen Xi, Yiming Shi, Kaizhong Gao, Jun Ouyang, Song S. Xue