Patents by Inventor Leland Chang

Leland Chang 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: 20160358852
    Abstract: An electronic device is provided. The electronic device includes a semiconductor layer, a dielectric layer disposed on the semiconductor layer, circuitry disposed on the dielectric layer that includes interconnected cells, first contact line metallization and second contact line metallization, first power metallization disposed in-plane with or above the circuitry and second power metallization disposed in a trench defined in at least the dielectric layer. The electronic device further includes insulation disposed to insulate the second power metallization from the circuitry and the first power metallization at first locations and to permit electrical communication between the second power metallization, the circuitry and the first power metallization at second locations.
    Type: Application
    Filed: June 8, 2015
    Publication date: December 8, 2016
    Inventors: Josephine B. Chang, Leland Chang, Michael A. Guillorn, Chung-Hsun Lin, Adam M. Pyzyna
  • Publication number: 20160358067
    Abstract: A reconfigurable neural network circuit is provided. The reconfigurable neural network circuit comprises an electronic synapse array including multiple synapses interconnecting a plurality of digital electronic neurons. Each neuron comprises an integrator that integrates input spikes and generates a signal when the integrated inputs exceed a threshold. The circuit further comprises a control module for reconfiguring the synapse array. The control module comprises a global final state machine that controls timing for operation of the circuit, and a priority encoder that allows spiking neurons to sequentially access the synapse array.
    Type: Application
    Filed: August 22, 2016
    Publication date: December 8, 2016
    Inventors: Bernard V. Brezzo, Leland Chang, Steven K. Esser, Daniel J. Friedman, Yong Liu, Dharmendra S. Modha, Robert K. Montoye, Bipin Rajendran, Jae-sun Seo, Jose A. Tierno
  • Publication number: 20160350451
    Abstract: An apparatus for storing data includes a latch circuit comprising a first set of transistors that propagate an input signal to an output signal and a second set of transistors that do not propagate the input signal of the latch circuit to the output signal wherein a gate pitch for the first set of transistors is substantially greater than a gate pitch for the second set of transistors. Also disclosed herein, a method for improving circuit performance includes receiving an electronic representation of a plurality of latching circuits associated with a design file and increasing transistor gate pitch for selected transistors of the plurality of latching circuits, wherein the selected transistors comprise transistors that propagate an input signal to an output signal. The method may also include fabricating a chip comprising the plurality of latching circuits. A computer program product corresponding to the method is also disclosed within.
    Type: Application
    Filed: August 12, 2016
    Publication date: December 1, 2016
    Inventors: Leland Chang, Robert K. Montoye
  • Patent number: 9496854
    Abstract: An apparatus includes a latch circuit comprising a first set of transistors that propagate an input signal of the latch circuit to an output signal of the latch circuit and a second set of transistors that do not propagate the input signal of the latch circuit to the output signal of the latch circuit wherein a gate pitch for the first set of transistors is substantially greater than a gate pitch for the second set of transistors. Also disclosed herein, a method for improving circuit performance includes receiving an electronic representation of a plurality of latching circuits associated with a design file and increasing transistor gate pitch for selected transistors of the plurality of latching circuits, wherein the selected transistors comprise transistors that propagate an input signal of a latch to an output signal of a latch. The method also includes fabricating a chip comprising the plurality of latching circuits.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: November 15, 2016
    Assignee: International Business Machines Corporation
    Inventors: Leland Chang, Robert K. Montoye
  • Publication number: 20160292569
    Abstract: A reconfigurable neural network circuit is provided. The reconfigurable neural network circuit comprises an electronic synapse array including multiple synapses interconnecting a plurality of digital electronic neurons. Each neuron comprises an integrator that integrates input spikes and generates a signal when the integrated inputs exceed a threshold. The circuit further comprises a control module for reconfiguring the synapse array. The control module comprises a global final state machine that controls timing for operation of the circuit, and a priority encoder that allows spiking neurons to sequentially access the synapse array.
    Type: Application
    Filed: June 14, 2016
    Publication date: October 6, 2016
    Inventors: Bernard V. Brezzo, Leland Chang, Steven K. Esser, Daniel J. Friedman, Yong Liu, Dharmendra S. Modha, Robert K. Montoye, Bipin Rajendran, Jae-sun Seo, Jose A. Tierno
  • Publication number: 20160293610
    Abstract: A semiconductor device including a pFET and an nFET where: (i) the gate and conductor channel of the pFET are electrically insulated from a buried oxide layer; and (ii) the conductor channel of the nFET is in the form of a fin extending upwards from, and in electrical contact with, the buried oxide layer. Also, a method of making the pFET by adding a fin structure extending from the top surface of the buried oxide layer, then condensing germanium locally into the lattice structure of the lower portion of the fin structure, and then etching away the lower portion of the fin structure so that it becomes a carrier channel suspended above, and electrically insulated from the buried oxide layer.
    Type: Application
    Filed: March 30, 2015
    Publication date: October 6, 2016
    Inventors: Josephine B. Chang, Leland Chang, Isaac Lauer, Jeffrey W. Sleight
  • Patent number: 9460383
    Abstract: A reconfigurable neural network circuit is provided. The reconfigurable neural network circuit comprises an electronic synapse array including multiple synapses interconnecting a plurality of digital electronic neurons. Each neuron comprises an integrator that integrates input spikes and generates a signal when the integrated inputs exceed a threshold. The circuit further comprises a control module for reconfiguring the synapse array. The control module comprises a global final state machine that controls timing for operation of the circuit, and a priority encoder that allows spiking neurons to sequentially access the synapse array.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: October 4, 2016
    Assignee: International Business Machines Corporation
    Inventors: Bernard V. Brezzo, Leland Chang, Steven K. Esser, Daniel J. Friedman, Yong Liu, Dharmendra S. Modha, Robert K. Montoye, Bipin Rajendran, Jae-sun Seo, Jose A. Tierno
  • Publication number: 20160269004
    Abstract: An apparatus for storing data includes a latch circuit comprising a first set of transistors that propagate an input signal to an output signal and a second set of transistors that do not propagate the input signal of the latch circuit to the output signal wherein a gate pitch for the first set of transistors is substantially greater than a gate pitch for the second set of transistors. Also disclosed herein, a method for improving circuit performance includes receiving an electronic representation of a plurality of latching circuits associated with a design file and increasing transistor gate pitch for selected transistors of the plurality of latching circuits, wherein the selected transistors comprise transistors that propagate an input signal to an output signal. The method may also include fabricating a chip comprising the plurality of latching circuits. A computer program product corresponding to the method is also disclosed within.
    Type: Application
    Filed: March 10, 2015
    Publication date: September 15, 2016
    Inventors: Leland Chang, Robert K. Montoye
  • Publication number: 20160260008
    Abstract: Embodiments of the invention relate to a time-division multiplexed neurosynaptic module with implicit memory addressing for implementing a universal substrate of adaptation. One embodiment comprises a neurosynaptic device including a memory device that maintains neuron attributes for multiple neurons. The module further includes multiple bit maps that maintain incoming firing events for different periods of delay and a multi-way processor. The processor includes a memory array that maintains a plurality of synaptic weights. The processor integrates incoming firing events in a time-division multiplexing manner. Incoming firing events are integrated based on the neuron attributes and the synaptic weights maintained.
    Type: Application
    Filed: May 13, 2016
    Publication date: September 8, 2016
    Inventors: John V. Arthur, Bernard V. Brezzo, Leland Chang, Daniel J. Friedman, Paul A. Merolla, Dharmendra S. Modha, Robert K. Montoye, Jae-sun Seo, Jose A. Tierno
  • Publication number: 20160254744
    Abstract: A switching power supply in an integrated circuit, an integrated circuit comprising a switching power supply, and a method of assembling a switching power supply in an integrated circuit are disclosed. In one embodiment, the invention provides a three-dimensional switching power supply in an integrated circuit comprising a device layer. The switching power supply comprises three distinct strata arranged in series with the device layer, the three distinct strata including a switching layer including switching circuits, a capacitor layer including banks of capacitors, and an inductor layer including inductors. This switching power supply further comprises a multitude of connectors electrically and mechanically connecting together the device layer, the switching layer, the capacitor layer, and the inductor layer. The switching circuits, the capacitors and the inductors form a switching power supply for supplying power to the device layer.
    Type: Application
    Filed: March 17, 2016
    Publication date: September 1, 2016
    Inventors: Paul S. Andry, Leland Chang, Evan G. Colgan, John U. Knickerbocker, Bucknell C. Webb, Robert Wisnieff
  • Publication number: 20160247063
    Abstract: A reconfigurable neural network circuit is provided. The reconfigurable neural network circuit comprises an electronic synapse array including multiple synapses interconnecting a plurality of digital electronic neurons. Each neuron comprises an integrator that integrates input spikes and generates a signal when the integrated inputs exceed a threshold. The circuit further comprises a control module for reconfiguring the synapse array. The control module comprises a global final state machine that controls timing for operation of the circuit, and a priority encoder that allows spiking neurons to sequentially access the synapse array.
    Type: Application
    Filed: September 2, 2014
    Publication date: August 25, 2016
    Inventors: Bernard V. Brezzo, Leland Chang, Steven K. Esser, Daniel J. Friedman, Yong Liu, Dharmendra S. Modha, Robert K. Montoye, Bipin Rajendran, Jae-Sun Seo, Jose A. Tierno
  • Publication number: 20160196867
    Abstract: In some embodiments, an apparatus for storing data includes a state retention circuit configured to retain a first state when placed into the first state and a second state when placed into the second state, a write port operably connected to the state retention circuit and configured to receive a data input and place the state retention circuit into a written state corresponding to the data input, a read port operably connected to the state retention circuit and configured to drive a data output according to the written state. In one embodiment, the write port and the read port comprise CMOS transistors and no tunneling field effect transistors, and the state retention circuit comprises tunneling field effect transistors and no CMOS transistors. A corresponding system and computer readable medium are also disclosed herein.
    Type: Application
    Filed: January 5, 2015
    Publication date: July 7, 2016
    Inventors: Leland Chang, Isaac Lauer, Amlan Majumdar, Jeffrey W. Sleight
  • Patent number: 9373073
    Abstract: Embodiments of the invention relate to a time-division multiplexed neurosynaptic module with implicit memory addressing for implementing a universal substrate of adaptation. One embodiment comprises a neurosynaptic device including a memory device that maintains neuron attributes for multiple neurons. The module further includes multiple bit maps that maintain incoming firing events for different periods of delay and a multi-way processor. The processor includes a memory array that maintains a plurality of synaptic weights. The processor integrates incoming firing events in a time-division multiplexing manner. Incoming firing events are integrated based on the neuron attributes and the synaptic weights maintained.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: June 21, 2016
    Assignee: International Business Machines Corporation
    Inventors: John V. Arthur, Bernard V. Brezzo, Leland Chang, Daniel J. Friedman, Paul A. Merolla, Dharmendra S. Modha, Robert K. Montoye, Jae-sun Seo, Jose A. Tierno
  • Publication number: 20160172970
    Abstract: An apparatus for providing on-chip voltage-regulated power includes a switched capacitor voltage conversion circuit that receives an elevated power demand signal and operates at a base rate when the elevated power demand signal is not active and at an elevated rate when the elevated power demand signal is active. The switched capacitor voltage conversion circuit comprises an auxiliary set of transistors that are disabled, when the elevated power demand signal is not active and enabled, when the elevated power demand signal is active. The apparatus may also include a droop detection circuit that monitors a monitored power signal and activates the elevated power demand signal in response to the monitored power signal dropping below a selected voltage level. The monitored power signal may be a voltage input provided by an input power supply for the switched capacitor voltage conversion circuit. A corresponding method is also disclosed herein.
    Type: Application
    Filed: December 11, 2014
    Publication date: June 16, 2016
    Inventors: Leland Chang, Robert K. Montoye, Jae-sun Seo, Albert M. Young
  • Patent number: 9368502
    Abstract: A memory cell, an array of memory cells, and a method for fabricating a memory cell with multigate transistors such as fully depleted finFET or nano-wire transistors in embedded DRAM. The memory cell includes a trench capacitor, a non-planar transistor, and a self-aligned silicide interconnect electrically coupling the trench capacitor to the non-planar transistor.
    Type: Grant
    Filed: October 17, 2011
    Date of Patent: June 14, 2016
    Assignee: GlogalFoundries, Inc.
    Inventors: Josephine B. Chang, Leland Chang, Michael A. Guillorn, Wilfried E. Haensch
  • Patent number: 9331577
    Abstract: A method is disclosed to operate a voltage conversion circuit such as a buck regulator circuit that has a plurality of switches coupled to a voltage source; a slab inductor having a length, a width and a thickness, where the slab inductor is coupled between the plurality of switches and a load and carries a load current during operation of the plurality of switches; and a means to reduce or cancel the detrimental effect of other wires on same chip, such as a power grid, potentially conducting return current and thereby degrading the functionality of this slab inductor. In one embodiment the wires can be moved further away from the slab inductor and in another embodiment magnetic materials can be used to shield the slab inductor from at least one such interfering conductor.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: May 3, 2016
    Assignee: International Business Machines Corporation
    Inventors: Leland Chang, David Goren, Naigang Wang
  • Publication number: 20160110640
    Abstract: Embodiments of the invention relate to a time-division multiplexed neurosynaptic module with implicit memory addressing for implementing a neural network. One embodiment comprises maintaining neuron attributes for multiple neurons and maintaining incoming firing events for different time steps. For each time step, incoming firing events for said time step are integrated in a time-division multiplexing manner. Incoming firing events are integrated based on the neuron attributes maintained. For each time step, the neuron attributes maintained are updated in parallel based on the integrated incoming firing events for said time step.
    Type: Application
    Filed: December 8, 2015
    Publication date: April 21, 2016
    Inventors: John V. Arthur, Bernard V. Brezzo, Leland Chang, Daniel J. Friedman, Paul A. Merolla, Dharmendra S. Modha, Robert K. Montoye, Jae-sun Seo, Jose A. Tierno
  • Patent number: 9318957
    Abstract: A method is disclosed to operate a voltage conversion circuit such as a buck regulator circuit that has a plurality of switches coupled to a voltage source; a slab inductor having a length, a width and a thickness, where the slab inductor is coupled between the plurality of switches and a load and carries a load current during operation of the plurality of switches; and a means to reduce or cancel the detrimental effect of other wires on same chip, such as a power grid, potentially conducting return current and thereby degrading the functionality of this slab inductor. In one embodiment the wires can be moved further away from the slab inductor and in another embodiment magnetic materials can be used to shield the slab inductor from at least one such interfering conductor.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: April 19, 2016
    Assignee: International Business Machines Corporation
    Inventors: Leland Chang, David Goren, Naigang Wang
  • Patent number: 9312761
    Abstract: A switching power supply in an integrated circuit, an integrated circuit comprising a switching power supply, and a method of assembling a switching power supply in an integrated circuit are disclosed. In one embodiment, the invention provides a three-dimensional switching power supply in an integrated circuit comprising a device layer. The switching power supply comprises three distinct strata arranged in series with the device layer, the three distinct strata including a switching layer including switching circuits, a capacitor layer including banks of capacitors, and an inductor layer including inductors. This switching power supply further comprises a multitude of connectors electrically and mechanically connecting together the device layer, the switching layer, the capacitor layer, and the inductor layer. The switching circuits, the capacitors and the inductors form a switching power supply for supplying power to the device layer.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: April 12, 2016
    Assignee: International Business Machines Corporation
    Inventors: Paul S. Andry, Leland Chang, Evan G. Colgan, John U. Knickerbocker, Bucknell C. Webb, Robert Wisnieff
  • Publication number: 20160087533
    Abstract: A method is disclosed to operate a voltage conversion circuit such as a buck regulator circuit that has a plurality of switches coupled to a voltage source; a slab inductor having a length, a width and a thickness, where the slab inductor is coupled between the plurality of switches and a load and carries a load current during operation of the plurality of switches; and a means to reduce or cancel the detrimental effect of other wires on same chip, such as a power grid, potentially conducting return current and thereby degrading the functionality of this slab inductor. In one embodiment the wires can be moved further away from the slab inductor and in another embodiment magnetic materials can be used to shield the slab inductor from at least one such interfering conductor.
    Type: Application
    Filed: December 3, 2015
    Publication date: March 24, 2016
    Inventors: Leland Chang, David Goren, Naigang Wang