Patents by Inventor Shih Liu

Shih Liu 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: 20200333714
    Abstract: Systems and methods for conducting critical dimension metrology are disclosed. According to certain embodiments, a charged particle beam apparatus generates a beam for imaging a first area and a second area. Measurements are acquired corresponding to a first feature in the first area, and measurements are acquired corresponding to a second feature in the second area. The first area and the second area are at separate locations on a sample. A combined measurement is calculated based on the measurements of the first feature and the measurements of the second feature.
    Type: Application
    Filed: October 5, 2018
    Publication date: October 22, 2020
    Inventors: Fei WANG, Wei FANG, Kuo-Shih LIU
  • Publication number: 20200227233
    Abstract: Disclosed herein is a method comprising: generating a plurality of probe spots on a sample by a plurality of beams of charged particles; while scanning the plurality of probe spots across a region on the sample, recording from the plurality of probe spots a plurality of sets of signals respectively representing interactions of the plurality of beams of charged particles and the sample; generating a plurality of images of the region respectively from the plurality of sets of signals; and generating a composite image of the region from the plurality of images.
    Type: Application
    Filed: March 27, 2020
    Publication date: July 16, 2020
    Inventors: Kuo-Shih LIU, Xuedong LIU, Wei FANG, Jack JAU
  • Patent number: 10475511
    Abstract: Two-terminal memory can be formed into a memory array that contains many discrete memory cells in a physical and a logical arrangement. Where each memory cell is isolated from surrounding circuitry by a single transistor, the resulting array is referred to as a 1T1R memory array. In contrast, where a group of memory cells are isolated from surrounding circuitry by a single transistor, the result is a 1TnR memory array. Because memory cells of a group are not isolated among themselves in the 1TnR case, bit disturb effects are theoretically possible when operating on a single memory cell. Read operations are disclosed for two-terminal memory devices configured to mitigate bit disturb effects, despite a lack of isolation transistors among memory cells of an array. Disclosed operations can facilitate reduced bit disturb effects even for high density two-terminal memory cell arrays.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: November 12, 2019
    Assignee: Crossbar, Inc.
    Inventors: Lin Shih Liu, Tianhong Yan, Sung Hyun Jo, Sang Nguyen, Hagop Nazarian
  • Patent number: 10388374
    Abstract: A non-volatile programmable circuit configurable to perform logic functions, is provided. The programmable circuit can employ two-terminal non-volatile memory devices to store information, thereby mitigating or avoiding disturbance of programmed data in the absence of external power. Two-terminal resistive switching memory devices having high current on/off ratios and fast switching times can also be employed for high performance, and facilitating a high density array. For look-up table applications, input/output response times can be several nanoseconds or less, facilitating much faster response times than a memory array access for retrieving stored data.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: August 20, 2019
    Assignee: Crossbar, Inc.
    Inventors: Mehdi Asnaashari, Hagop Nazarian, Lin Shih Liu
  • Patent number: 10199105
    Abstract: Providing for a configuration cells for junction nodes of a field programmable gate array (FPGA) is described herein. By way of example, a configuration cell can comprise non-volatile resistive switching memory to facilitate programmable storage of data as an input to a control circuit of a junction node. The control circuit can activate or deactivate a junction node of the FPGA in response to a value of the data stored in the non-volatile resistive switching memory. The control circuit can comprise an SRAM circuit for fast operation of the junction node. Moreover, the non-volatile memory of the configuration cell facilitates fast power-up of the control circuit utilizing data stored in the resistive switching memory, and minimizes power consumption associated with storing the data.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: February 5, 2019
    Assignee: CROSSBAR, INC.
    Inventors: Lin Shih Liu, Hagop Nazarian
  • Patent number: 10134469
    Abstract: Two-terminal memory can be formed into a memory array that contains many discrete memory cells in a physical and a logical arrangement. Where each memory cell is isolated from surrounding circuitry by a single transistor, the resulting array is referred to as a 1T1R memory array. In contrast, where a group of memory cells are isolated from surrounding circuitry by a single transistor, the result is a 1TnR memory array. Because memory cells of a group are not isolated among themselves in the 1TnR case, bit disturb effects are theoretically possible when operating on a single memory cell. Read operations are disclosed for two-terminal memory devices configured to mitigate bit disturb effects, despite a lack of isolation transistors among memory cells of an array. Disclosed operations can facilitate reduced bit disturb effects even for high density two-terminal memory cell arrays.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: November 20, 2018
    Assignee: CROSSBAR, INC.
    Inventors: Lin Shih Liu, Tianhong Yan, Sung Hyun Jo, Sang Nguyen, Hagop Nazarian
  • Patent number: 10079060
    Abstract: Providing for improved sensing of non-volatile resistive memory to achieve higher sensing margins, is described herein. The sensing can leverage current-voltage characteristics of a volatile selector device within the resistive memory. A disclosed sensing process can comprise activating the selector device with an activation voltage, and then lowering the activation voltage to a holding voltage at which the selector device deactivates for an off-state memory cell, but remains active for an on-state memory cell. Accordingly, very high on-off ratio characteristics of the selector device can be employed for sensing the resistive memory, providing sensing margins not previously achievable for non-volatile memory.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: September 18, 2018
    Assignee: CROSSBAR, INC.
    Inventors: Sung Hyun Jo, Hagop Nazarian, Lin Shih Liu
  • Publication number: 20170351240
    Abstract: The installation position pointer system comprises a laser source to supply a laser beam, a driving device to align the laser beam, a controller device to control the operation of the driving device in accordance with an installation position data (IPD) of an attachment to be installed in a building and an associated reference position in the building, and an input device to obtain the IPD of a plurality of attachments from the attachment. The IPD of the attachments may be provided by an attachment installation position database system.
    Type: Application
    Filed: March 7, 2017
    Publication date: December 7, 2017
    Inventor: Jane Win Shih Liu
  • Publication number: 20170330622
    Abstract: Providing for a configuration cells for junction nodes of a field programmable gate array (FPGA) is described herein. By way of example, a configuration cell can comprise non-volatile resistive switching memory to facilitate programmable storage of data as an input to a control circuit of a junction node. The control circuit can activate or deactivate a junction node of the FPGA in response to a value of the data stored in the non-volatile resistive switching memory. The control circuit can comprise an SRAM circuit for fast operation of the junction node. Moreover, the non-volatile memory of the configuration cell facilitates fast power-up of the control circuit utilizing data stored in the resistive switching memory, and minimizes power consumption associated with storing the data.
    Type: Application
    Filed: May 11, 2017
    Publication date: November 16, 2017
    Inventors: Lin Shih Liu, Hagop Nazarian
  • Publication number: 20170229169
    Abstract: Providing for improved sensing of non-volatile resistive memory to achieve higher sensing margins, is described herein. The sensing can leverage current-voltage characteristics of a volatile selector device within the resistive memory. A disclosed sensing process can comprise activating the selector device with an activation voltage, and then lowering the activation voltage to a holding voltage at which the selector device deactivates for an off-state memory cell, but remains active for an on-state memory cell. Accordingly, very high on-off ratio characteristics of the selector device can be employed for sensing the resistive memory, providing sensing margins not previously achievable for non-volatile memory.
    Type: Application
    Filed: April 24, 2017
    Publication date: August 10, 2017
    Inventors: Sung Hyun Jo, Hagop Nazarian, Lin Shih Liu
  • Patent number: 9659646
    Abstract: A non-volatile programmable circuit configurable to perform logic functions, is provided. The programmable circuit can employ two-terminal non-volatile memory devices to store information, thereby mitigating or avoiding disturbance of programmed data in the absence of external power. Two-terminal resistive switching memory devices having high current on/off ratios and fast switching times can also be employed for high performance, and facilitating a high density array. For look-up table applications, input/output response times can be several nanoseconds or less, facilitating much faster response times than a memory array access for retrieving stored data.
    Type: Grant
    Filed: January 11, 2016
    Date of Patent: May 23, 2017
    Assignee: CROSSBAR, INC.
    Inventors: Mehdi Asnaashari, Hagop Nazarian, Lin Shih Liu
  • Patent number: 9633724
    Abstract: Providing for improved sensing of non-volatile resistive memory to achieve higher sensing margins, is described herein. The sensing can leverage current-voltage characteristics of a volatile selector device within the resistive memory. A disclosed sensing process can comprise activating the selector device with an activation voltage, and then lowering the activation voltage to a holding voltage at which the selector device deactivates for an off-state memory cell, but remains active for an on-state memory cell. Accordingly, very high on-off ratio characteristics of the selector device can be employed for sensing the resistive memory, providing sensing margins not previously achievable for non-volatile memory.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: April 25, 2017
    Assignee: CROSSBAR, INC.
    Inventors: Sung Hyun Jo, Hagop Nazarian, Lin Shih Liu
  • Patent number: 9520182
    Abstract: Integrated circuits with memory elements are provided. An integrated circuit may include logic circuitry formed in a first portion having complementary metal-oxide-semiconductor (CMOS) devices and may include at least a portion of the memory elements and associated memory circuitry formed in a second portion having nano-electromechanical (NEM) relay devices. The NEM and CMOS devices may be interconnected through vias in a dielectric stack. Devices in the first and second portions may receive respective power supply voltages. In one suitable arrangement, the memory elements may include two relay switches that provide nonvolatile storage characteristics and soft error upset (SEU) immunity. In another suitable arrangement, the memory elements may include first and second cross-coupled inverting circuits. The first inverting circuit may include relay switches, whereas the second inverting circuit includes only CMOS transistors.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: December 13, 2016
    Assignee: Altera Corporation
    Inventors: Lin-Shih Liu, Mark T. Chan, Yanzhong Xu, Irfan Rahim, Jeffrey T. Watt
  • Patent number: 9245592
    Abstract: Integrated circuits are provided that have volatile memory elements. The memory elements produce output signals. The integrated circuits may be programmable logic device integrated circuits containing programmable core logic including transistors with gates. The core logic is powered using a core logic power supply level defined by a core logic positive power supply voltage and a core logic ground voltage. When loaded with configuration data, the memory elements produce output signals that are applied to the gates of the transistors in the core logic to customize the programmable logic device. The memory elements are powered with a memory element power supply level defined by a memory element positive power supply voltage and a memory element ground power supply voltage. The memory element power supply level is elevated with respect to the core logic power supply level.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: January 26, 2016
    Assignee: Altera Corporation
    Inventors: Lin-Shih Liu, Mark T. Chan, Toan D. Do
  • Publication number: 20160005461
    Abstract: Providing for improved sensing of non-volatile resistive memory to achieve higher sensing margins, is described herein. The sensing can leverage current-voltage characteristics of a volatile selector device within the resistive memory. A disclosed sensing process can comprise activating the selector device with an activation voltage, and then lowering the activation voltage to a holding voltage at which the selector device deactivates for an off-state memory cell, but remains active for an on-state memory cell. Accordingly, very high on-off ratio characteristics of the selector device can be employed for sensing the resistive memory, providing sensing margins not previously achievable for non-volatile memory.
    Type: Application
    Filed: June 30, 2015
    Publication date: January 7, 2016
    Inventors: Sung Hyun Jo, Hagop Nazarian, Lin Shih Liu
  • Publication number: 20140085967
    Abstract: Integrated circuits with memory elements are provided. An integrated circuit may include logic circuitry formed in a first portion having complementary metal-oxide-semiconductor (CMOS) devices and may include at least a portion of the memory elements and associated memory circuitry formed in a second portion having nano-electromechanical (NEM) relay devices. The NEM and CMOS devices may be interconnected through vias in a dielectric stack. Devices in the first and second portions may receive respective power supply voltages. In one suitable arrangement, the memory elements may include two relay switches that provide nonvolatile storage characteristics and soft error upset (SEU) immunity. In another suitable arrangement, the memory elements may include first and second cross-coupled inverting circuits. The first inverting circuit may include relay switches, whereas the second inverting circuit includes only CMOS transistors.
    Type: Application
    Filed: November 27, 2013
    Publication date: March 27, 2014
    Applicant: Altera Corporation
    Inventors: Lin-Shih Liu, Mark T. Chan, Yanzhong Xu, Irfan Rahim, Jeffrey T. Watt
  • Patent number: 8643108
    Abstract: One embodiment relates to a buffered transistor device. The device includes a buffered vertical fin-shaped structure formed in a semiconductor substrate. The vertical fin-shaped structure includes at least an upper semiconductor layer, a buffer region, and at least part of a well region. The buffer region has a first doping polarity, and the well region has a second doping polarity which is opposite to the first doping polarity. At least one p-n junction that at least partially covers a horizontal cross section of the vertical fin-shaped structure is formed between the buffer and well regions. Other embodiments, aspects, and features are also disclosed.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: February 4, 2014
    Assignee: Altera Corporation
    Inventors: Irfan Rahim, Jeffrey T. Watt, Yanzhong Xu, Lin-Shih Liu
  • Patent number: 8611137
    Abstract: Integrated circuits with memory elements are provided. An integrated circuit may include logic circuitry formed in a first portion having complementary metal-oxide-semiconductor (CMOS) devices and may include at least a portion of the memory elements and associated memory circuitry formed in a second portion having nano-electromechanical (NEM) relay devices. The NEM and CMOS devices may be interconnected through vias in a dielectric stack. Devices in the first and second portions may receive respective power supply voltages. In one suitable arrangement, the memory elements may include two relay switches that provide nonvolatile storage characteristics and soft error upset (SEU) immunity. In another suitable arrangement, the memory elements may include first and second cross-coupled inverting circuits. The first inverting circuit may include relay switches, whereas the second inverting circuit includes only CMOS transistors.
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: December 17, 2013
    Assignee: Altera Corporation
    Inventors: Lin-Shih Liu, Mark T. Chan, Yanzhong Xu, Irfan Rahim, Jeffrey T. Watt
  • Patent number: 8582079
    Abstract: Interference lithography (IL) system and methods are disclosed according to embodiments of the invention. Two beams of coherent light with a first phase difference expose a first interference pattern on a nonlinear photoresist. A second interference pattern may be exposed on the nonlinear photoresist using the same coherent light beams with a second phase difference. The difference between the first and second phase differences is between 70° and 270°. The ensuing pattern is a composite of the first and second interference patterns. The IL may employ a third and fourth light beam.
    Type: Grant
    Filed: August 14, 2007
    Date of Patent: November 12, 2013
    Assignee: Applied Materials, Inc.
    Inventors: Kuo-Shih Liu, Rudolf Hendel
  • Publication number: 20130127494
    Abstract: Integrated circuits with memory elements are provided. An integrated circuit may include logic circuitry formed in a first portion having complementary metal-oxide-semiconductor (CMOS) devices and may include at least a portion of the memory elements and associated memory circuitry formed in a second portion having nano-electromechanical (NEM) relay devices. The NEM and CMOS devices may be interconnected through vias in a dielectric stack. Devices in the first and second portions may receive respective power supply voltages. In one suitable arrangement, the memory elements may include two relay switches that provide nonvolatile storage characteristics and soft error upset (SEU) immunity. In another suitable arrangement, the memory elements may include first and second cross-coupled inverting circuits. The first inverting circuit may include relay switches, whereas the second inverting circuit includes only CMOS transistors.
    Type: Application
    Filed: November 23, 2011
    Publication date: May 23, 2013
    Inventors: Lin-Shih Liu, Mark T. Chan, Yanzhong Xu, Irfan Rahim, Jeffrey T. Watt