Patents by Inventor Fong Lim

Fong Lim 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: 9576652
    Abstract: The invention provides a resistive memory apparatus including at least one first resistive memory cell, a first bit line selecting switch, a first source line selecting switch, a first pull down switch and a second pull down switch. The first bit line selecting switch is coupled between a first bit line and a sense amplifier. The first source line selecting switch is coupled between a source line and the sense amplifier. The first and second pull down switches are respectively coupled to the bit line and source line. When a reading operation is operated, on or off statuses of the first bit line selecting switch and the second pull down switch are the same, on or off statuses of the first source line selecting switch and the first pull down switch are the same, and on or off statuses of the first and second pull down switches are complementary.
    Type: Grant
    Filed: January 11, 2016
    Date of Patent: February 21, 2017
    Assignee: Winbond Electronics Corp.
    Inventors: Seow-Fong Lim, Johnny Chan, Douk-Hyoun Ryu, Chi-Shun Lin
  • Publication number: 20160379692
    Abstract: Embodiments of the invention relate generally to semiconductors and memory technology, and more particularly, to systems, integrated circuits, and methods to implement circuits configured to compensate for parameter variations in layers of memory by adjusting access signals during memory operations. In some embodiments, memory cells are based on third dimensional memory technology. In at least some embodiments, an integrated circuit includes multiple layers of memory, a layer including sub-layers of semiconductor material. The integrated circuit also includes an access signal generator configured to generate an access signal to facilitate an access operation, and a characteristic adjuster configured to adjust the access signal for each layer in the multiple layers of memory.
    Type: Application
    Filed: June 29, 2016
    Publication date: December 29, 2016
    Inventors: Christophe Chevallier, Seow Fong Lim, Chang Hua Siau
  • Patent number: 9384806
    Abstract: A memory device includes a plurality of memory layers and a selecting circuit configured to select a delta value corresponding to a parameter of at least one of the plurality of memory layers having fabricated thereon at least one memory cell accessed during an operation. The memory device further includes an adjusting circuit configured to adjust an access signal based at least in part on the delta value, the access signal being configured to access the at least one memory cell during the operation.
    Type: Grant
    Filed: August 15, 2015
    Date of Patent: July 5, 2016
    Assignee: Unity Semiconductor Corporation
    Inventors: Christophe Chevallier, Seow Fong Lim, Chang Hua Siau
  • Publication number: 20150364169
    Abstract: Embodiments of the invention relate generally to semiconductors and memory technology, and more particularly, to systems, integrated circuits, and methods to implement circuits configured to compensate for parameter variations in layers of memory by adjusting access signals during memory operations. In some embodiments, memory cells are based on third dimensional memory technology. In at least some embodiments, an integrated circuit includes multiple layers of memory, a layer including sub-layers of semiconductor material. The integrated circuit also includes an access signal generator configured to generate an access signal to facilitate an access operation, and a characteristic adjuster configured to adjust the access signal for each layer in the multiple layers of memory.
    Type: Application
    Filed: August 15, 2015
    Publication date: December 17, 2015
    Applicant: UNITY SEMICONDUCTOR CORPORATION
    Inventors: Christophe Chevallier, Seow Fong Lim, Chang Hua Siau
  • Patent number: 9129668
    Abstract: Embodiments of the invention relate generally to semiconductors and memory technology, and more particularly, to systems, integrated circuits, and methods to implement circuits configured to compensate for parameter variations in layers of memory by adjusting access signals during memory operations. In some embodiments, memory cells are based on third dimensional memory technology. In at least some embodiments, an integrated circuit includes multiple layers of memory, a layer including sub-layers of semiconductor material. The integrated circuit also includes an access signal generator configured to generate an access signal to facilitate an access operation, and a characteristic adjuster configured to adjust the access signal for each layer in the multiple layers of memory.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: September 8, 2015
    Assignee: Unity Semiconductor Corporation
    Inventors: Christophe Chevallier, Seow Fong Lim, Chang Hua Siau
  • Publication number: 20150132917
    Abstract: Embodiments relate generally to semiconductors and memory technology, and more particularly, to systems, integrated circuits, and methods to implement a memory architecture that includes local bit lines for accessing subsets of memory elements, such as memory elements based on third dimensional memory technology. In at least some embodiments, an integrated circuit includes a cross-point memory array formed above a logic layer. The cross-point memory array includes X-lines and Y-lines, of which at least one Y-line includes groups of Y-line portions. Each of the Y-line portions can be arranged in parallel with other Y-line portions within a group of the Y-line portions. Also included are memory elements disposed between a subset of the X-lines and the group of the Y-line portions. In some embodiments, a decoder is configured to select a Y-line portion from the group of Y-line portions to access a subset of the memory elements.
    Type: Application
    Filed: October 29, 2014
    Publication date: May 14, 2015
    Inventors: Chang Hua Siau, Christophe Chevallier, Darrell Rinerson, Seow Fong Lim, Sri Rama Namala
  • Patent number: 8975117
    Abstract: A method includes providing a semiconductor chip having a first main surface and a second main surface. A semiconductor chip is placed on a carrier with the first main surface of the semiconductor chip facing the carrier. A first layer of solder material is provided between the first main surface and the carrier. A contact clip including a first contact area is placed on the semiconductor chip with the first contact area facing the second main surface of the semiconductor chip. A second layer of solder material is provided between the first contact area and the second main surface. Thereafter, heat is applied to the first and second layers of solder material to form diffusion solder bonds between the carrier, the semiconductor chip and the contact clip.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: March 10, 2015
    Assignee: Infineon Technologies AG
    Inventors: Ralf Otremba, Fong Lim, Abdul Rahman Mohamed, Chooi Mei Chong, Ida Fischbach, Xaver Schloegel, Juergen Schredl, Josef Hoeglauer
  • Publication number: 20150055425
    Abstract: Embodiments of the invention relate generally to semiconductors and memory technology, and more particularly, to systems, integrated circuits, and methods to implement circuits configured to compensate for parameter variations in layers of memory by adjusting access signals during memory operations. In some embodiments, memory cells are based on third dimensional memory technology. In at least some embodiments, an integrated circuit includes multiple layers of memory, a layer including sub-layers of semiconductor material. The integrated circuit also includes an access signal generator configured to generate an access signal to facilitate an access operation, and a characteristic adjuster configured to adjust the access signal for each layer in the multiple layers of memory.
    Type: Application
    Filed: September 3, 2014
    Publication date: February 26, 2015
    Applicant: UNITY SEMICONDUCTOR CORPORATION
    Inventors: Christophe Chevallier, Seow Fong Lim, Chang Hua Siau
  • Patent number: 8897050
    Abstract: Embodiments relate generally to semiconductors and memory technology, and more particularly, to systems, integrated circuits, and methods to implement a memory architecture that includes local bit lines for accessing subsets of memory elements, such as memory elements based on third dimensional memory technology. In at least some embodiments, an integrated circuit includes a cross-point memory array formed above a logic layer. The cross-point memory array includes X-lines and Y-lines, of which at least one Y-line includes groups of Y-line portions. Each of the Y-line portions can be arranged in parallel with other Y-line portions within a group of the Y-line portions. Also included are memory elements disposed between a subset of the X-lines and the group of the Y-line portions. In some embodiments, a decoder is configured to select a Y-line portion from the group of Y-line portions to access a subset of the memory elements.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: November 25, 2014
    Assignee: Unity Semiconductor Corporation
    Inventors: Chang Hua Siau, Christophe Chevallier, Darrell Rinerson, Seow Fong Lim, Sri Namala
  • Patent number: 8854881
    Abstract: Embodiments of the invention relate generally to semiconductors and memory technology, and more particularly, to systems, integrated circuits, and methods to implement circuits configured to compensate for parameter variations in layers of memory by adjusting access signals during memory operations. In some embodiments, memory cells are based on third dimensional memory technology. In at least some embodiments, an integrated circuit includes multiple layers of memory, a layer including sub-layers of semiconductor material. The integrated circuit also includes an access signal generator configured to generate an access signal to facilitate an access operation, and a characteristic adjuster configured to adjust the access signal for each layer in the multiple layers of memory.
    Type: Grant
    Filed: April 8, 2013
    Date of Patent: October 7, 2014
    Assignee: Unity Semiconductor Corporation
    Inventors: Christophe Chevallier, Seow Fong Lim, Chang Hua Siau
  • Patent number: 8705260
    Abstract: Embodiments of the invention relate generally to semiconductors and memory technology, and more particularly, to systems, integrated circuits, and methods to implement circuits configured to compensate for parameter variations that affect the operation of memory elements, such as memory elements based on third dimensional memory technology. In at least some embodiments, an integrated circuit includes a cross-point array comprising memory elements disposed among word lines and bit lines, where a parameter can affect the operating characteristics of a memory element. The integrated circuit further includes a data signal adjuster configured to modify the operating characteristic to compensate for a deviation from a target value for the operating characteristic based on the parameter. In some embodiments, the memory element, such as a resistive memory element, is configured to generate a data signal having a magnitude substantially at the target value independent of variation in the parameter.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: April 22, 2014
    Assignee: Unity Semiconductor Corporation
    Inventors: Christophe Chevallier, Seow Fong Lim, Chang Hua Siau
  • Publication number: 20140071766
    Abstract: The present invention discloses a reference cell circuit which is applied to a non-volatile memory. The reference cell circuit includes a reference cell array, a first current mirror circuit, and a second current mirror circuit. The reference cell array includes at least one row of floating gate transistors. The first current mirror circuit is arranged to generate a mirror current according to a reference current generated by the reference cell array. The second current mirror circuit is arranged to receive the mirror current and generate an adjusted reference current according to the mirror current and a selected one of a plurality of enable signals, wherein the plurality of enable signals correspond to a plurality operations of the non-volatile memory and the adjusted reference current is arranged to determine logical state of a plurality of memory cells of the non-volatile memory.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: WINBOND ELECTRONICS CORP.
    Inventors: Chi-Shun LIN, Seow-Fong LIM, Ming-Huei SHIEH
  • Patent number: 8665651
    Abstract: The present invention discloses a reference cell circuit which is applied to a non-volatile memory. The reference cell circuit includes a reference cell array, a first current mirror circuit, and a second current mirror circuit. The reference cell array includes at least one row of floating gate transistors. The first current mirror circuit is arranged to generate a mirror current according to a reference current generated by the reference cell array. The second current mirror circuit is arranged to receive the mirror current and generate an adjusted reference current according to the mirror current and a selected one of a plurality of enable signals, wherein the plurality of enable signals correspond to a plurality operations of the non-volatile memory and the adjusted reference current is arranged to determine logical state of a plurality of memory cells of the non-volatile memory.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: March 4, 2014
    Assignee: Winbond Electronics Corp.
    Inventors: Chi-Shun Lin, Seow-Fong Lim, Ming-Huei Shieh
  • Publication number: 20130229856
    Abstract: Embodiments of the invention relate generally to semiconductors and memory technology, and more particularly, to systems, integrated circuits, and methods to implement circuits configured to compensate for parameter variations in layers of memory by adjusting access signals during memory operations. In some embodiments, memory cells are based on third dimensional memory technology. In at least some embodiments, an integrated circuit includes multiple layers of memory, a layer including sub-layers of semiconductor material. The integrated circuit also includes an access signal generator configured to generate an access signal to facilitate an access operation, and a characteristic adjuster configured to adjust the access signal for each layer in the multiple layers of memory.
    Type: Application
    Filed: April 8, 2013
    Publication date: September 5, 2013
    Inventors: Christophe Chevallier, Seow Fong Lim, Chang Hua Siau
  • Publication number: 20130215667
    Abstract: Embodiments of the invention relate generally to semiconductors and memory technology, and more particularly, to systems, integrated circuits, and methods to implement circuits configured to compensate for parameter variations that affect the operation of memory elements, such as memory elements based on third dimensional memory technology. In at least some embodiments, an integrated circuit includes a cross-point array comprising memory elements disposed among word lines and bit lines, where a parameter can affect the operating characteristics of a memory element. The integrated circuit further includes a data signal adjuster configured to modify the operating characteristic to compensate for a deviation from a target value for the operating characteristic based on the parameter. In some embodiments, the memory element, such as a resistive memory element, is configured to generate a data signal having a magnitude substantially at the target value independent of variation in the parameter.
    Type: Application
    Filed: December 27, 2012
    Publication date: August 22, 2013
    Applicant: Unity Semiconductor Corporation
    Inventors: Christophe Chevallier, Seow Fong Lim, Chang Hua Siau
  • Publication number: 20130200532
    Abstract: A method includes providing a semiconductor chip having a first main surface and a second main surface. A semiconductor chip is placed on a carrier with the first main surface of the semiconductor chip facing the carrier. A first layer of solder material is provided between the first main surface and the carrier. A contact clip including a first contact area is placed on the semiconductor chip with the first contact area facing the second main surface of the semiconductor chip. A second layer of solder material is provided between the first contact area and the second main surface. Thereafter, heat is applied to the first and second layers of solder material to form diffusion solder bonds between the carrier, the semiconductor chip and the contact clip.
    Type: Application
    Filed: February 8, 2012
    Publication date: August 8, 2013
    Applicant: INFINEON TECHNOLOGIES AG
    Inventors: Ralf Otremba, Fong Lim, Abdul Rahman Mohamed, Chooi Mei Chong, Ida Fischbach, Xaver Schloegel, Juergen Schredl, Josef Hoeglauer
  • Patent number: 8482119
    Abstract: A semiconductor chip assembly includes a semiconductor chip and a pyrolytic graphite element that is an electrode that is electrically connected to and provides electrical conduction of current from the chip during operation of the chip.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: July 9, 2013
    Assignee: Infineon Technologies AG
    Inventors: Fong Lim, See Yau Lee, Yang Hong Heng
  • Patent number: 8427868
    Abstract: Embodiments of the invention relate generally to semiconductors and memory technology, and more particularly, to systems, integrated circuits, and methods to implement circuits configured to compensate for parameter variations in layers of memory by adjusting access signals during memory operations. In some embodiments, memory cells are based on third dimensional memory technology. In at least some embodiments, an integrated circuit includes multiple layers of memory, a layer including sub-layers of semiconductor material. The integrated circuit also includes an access signal generator configured to generate an access signal to facilitate an access operation, and a characteristic adjuster configured to adjust the access signal for each layer in the multiple layers of memory.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: April 23, 2013
    Assignee: Unity Semiconductor Corporation
    Inventors: Christophe J. Chevallier, Seow Fong Lim, Chang Hua Siau
  • Patent number: 8363443
    Abstract: Embodiments of the invention relate generally to semiconductors and memory technology, and more particularly, to systems, integrated circuits, and methods to implement circuits configured to compensate for parameter variations that affect the operation of memory elements, such as memory elements based on third dimensional memory technology. In at least some embodiments, an integrated circuit includes a cross-point array comprising memory elements disposed among word lines and bit lines, where a parameter can affect the operating characteristics of a memory element. The integrated circuit further includes a data signal adjuster configured to modify the operating characteristic to compensate for a deviation from a target value for the operating characteristic based on the parameter. In some embodiments, the memory element, such as a resistive memory element, is configured to generate a data signal having a magnitude substantially at the target value independent of variation in the parameter.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: January 29, 2013
    Assignee: Unity Semiconductor Corporation
    Inventors: Christophe J. Chevallier, Seow Fong Lim, Chang Hua Siau
  • Publication number: 20120307542
    Abstract: Embodiments relate generally to semiconductors and memory technology, and more particularly, to systems, integrated circuits, and methods to implement a memory architecture that includes local bit lines for accessing subsets of memory elements, such as memory elements based on third dimensional memory technology. In at least some embodiments, an integrated circuit includes a cross-point memory array formed above a logic layer. The cross-point memory array includes X-lines and Y-lines, of which at least one Y-line includes groups of Y-line portions. Each of the Y-line portions can be arranged in parallel with other Y-line portions within a group of the Y-line portions. Also included are memory elements disposed between a subset of the X-lines and the group of the Y-line portions. In some embodiments, a decoder is configured to select a Y-line portion from the group of Y-line portions to access a subset of the memory elements.
    Type: Application
    Filed: August 17, 2012
    Publication date: December 6, 2012
    Applicant: UNITY SEMICONDUCTOR CORPORATION
    Inventors: Chang Hua Siau, Christophe Chevallier, Darrell Rinerson, Seow Fong Lim, Sri Namala