Patents by Inventor Chi-Jui Chen

Chi-Jui Chen 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: 20250095698
    Abstract: A random-access memory has its bitcells arranged into a first pair of banks and a second pair of banks. The first pair of banks and second pair of banks are separated by a central controller that contains sense amplifiers and write drivers for the first pair of banks and for the second pair of banks.
    Type: Application
    Filed: September 19, 2023
    Publication date: March 20, 2025
    Inventors: Sonia GHOSH, Xiao CHEN, Chi-Jui CHEN
  • Publication number: 20240428831
    Abstract: A circuit is provided with a selectively diode-connected head switch transistor. During a light-sleep mode, the head switch transistor is diode connected so that a power supply voltage passing through the diode-connected head switch transistor is reduced by a transistor threshold voltage drop. During an active mode, the diode connection is opened so that the head switch transistor passes a power supply voltage with virtually no voltage drop.
    Type: Application
    Filed: June 23, 2023
    Publication date: December 26, 2024
    Inventors: Chi-Jui CHEN, Xiao CHEN, Sonia GHOSH, Hochul LEE, Anil Chowdary KOTA, Giby SAMSON
  • Patent number: 12125526
    Abstract: A memory is provided that includes bitcell VDD boosting to increase a read margin. In some implementations, the positive boost for the bitcell VDD may be provided by a capacitor that is also used for negative boosting of a write driver.
    Type: Grant
    Filed: March 30, 2022
    Date of Patent: October 22, 2024
    Assignee: QUALCOMM INCORPORATED
    Inventors: Chulmin Jung, Xiao Chen, Chi-Jui Chen, Anil Chowdary Kota, Dhvani Sheth
  • Publication number: 20230317150
    Abstract: A memory is provided that includes bitcell VDD boosting to increase a read margin. In some implementations, the positive boost for the bitcell VDD may be provided by a capacitor that is also used for negative boosting of a write driver.
    Type: Application
    Filed: March 30, 2022
    Publication date: October 5, 2023
    Inventors: Chulmin JUNG, Xiao CHEN, Chi-Jui CHEN, Anil Chowdary KOTA, Dhvani SHETH
  • Patent number: 11488658
    Abstract: Methods and apparatuses having an improved write assist scheme are presented. An apparatus includes a power supply node configured to provide power from a power supply to one memory cell to store data; a bitline configured to provide write data to the one memory cell in a write operation; and a discharge circuit configured to selectively discharge the power supply node to the bitline, based on the write data. A method to write into a memory cell with a write assist scheme includes providing power from a power supply to one memory cell via a power supply node, to store data; providing write data to the one memory cell via a bitline in a write operation; and discharging, selectively based on the write data, the power supply node to the bitline.
    Type: Grant
    Filed: April 29, 2020
    Date of Patent: November 1, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Chulmin Jung, Bin Liang, Chi-Jui Chen
  • Publication number: 20210350865
    Abstract: A method for a memory subsystem redundancy with priority decoding is described. The method includes dynamically repairing a local input/output (IO) unit of a first memory subsystem bank based on a current redundancy fuse input pattern of the first memory subsystem bank. The method also includes concurrently generating a redundancy shift signal in each global IO based on the current redundancy fuse input pattern to shift the repaired local IO unit and lower order local IO units of the first memory subsystem bank relative to the repaired local IO unit.
    Type: Application
    Filed: May 6, 2020
    Publication date: November 11, 2021
    Inventors: Chulmin JUNG, Bin LIANG, Chi-Jui CHEN
  • Patent number: 11170865
    Abstract: A method for a memory subsystem redundancy with priority decoding is described. The method includes dynamically repairing a local input/output (IO) unit of a first memory subsystem bank based on a current redundancy fuse input pattern of the first memory subsystem bank. The method also includes concurrently generating a redundancy shift signal in each global IO based on the current redundancy fuse input pattern to shift the repaired local IO unit and lower order local IO units of the first memory subsystem bank relative to the repaired local IO unit.
    Type: Grant
    Filed: May 6, 2020
    Date of Patent: November 9, 2021
    Assignee: Qualcomm Incorporated
    Inventors: Chulmin Jung, Bin Liang, Chi-Jui Chen
  • Publication number: 20210343330
    Abstract: Methods and apparatuses having an improved write assist scheme are presented. An apparatus includes a power supply node configured to provide power from a power supply to one memory cell to store data; a bitline configured to provide write data to the one memory cell in a write operation; and a discharge circuit configured to selectively discharge the power supply node to the bitline, based on the write data. A method to write into a memory cell with a write assist scheme includes providing power from a power supply to one memory cell via a power supply node, to store data; providing write data to the one memory cell via a bitline in a write operation; and discharging, selectively based on the write data, the power supply node to the bitline.
    Type: Application
    Filed: April 29, 2020
    Publication date: November 4, 2021
    Inventors: Chulmin Jung, Bin Liang, Chi-Jui Chen
  • Publication number: 20080079013
    Abstract: A light emitting diode structure including a substrate, a first type doped semiconductor layer, an insulating layer, light emitting layers, a second type doped semiconductor layer, a first pad and a second pad is provided. The first type doped semiconductor layer is disposed on the substrate. The insulating layer having openings is disposed on the first type doped semiconductor layer for exposing a part of the first type doped semiconductor layer. The light emitting layers are disposed within the corresponding openings of the insulating layer respectively. The second type doped semiconductor layer is disposed on the insulating layer and the light emitting layers. The first pad is disposed on the first type doped semiconductor layer and is electrically connected thereto. The second pad is disposed on the second type doped semiconductor layer and is electrically connected thereto. Besides, air gaps may also be utilized for separating the light emitting layers.
    Type: Application
    Filed: September 28, 2006
    Publication date: April 3, 2008
    Applicant: FORMOSA EPITAXY INCORPORATION
    Inventors: Yun-Li Li, Tzu-Chi Wen, Liang-Wen Wu, Chi-Jui Chen, Fen-Ren Chien
  • Patent number: 6784081
    Abstract: A method of forming a gate structure includes forming sequentially a pad layer and a first photoresist layer over a substrate. A cross-linked surface layer is formed on the surface of the first photoresist layer, followed by rounding the profile of the first photoresist layer, and removing the exposed pad layer to expose the substrate. A second photoresist layer is formed over the first photoresist layer, wherein a portion of the first photoresist layer and the exposed substrate are exposed by the second photoresist layer. Thereafter, a conductive layer is formed, wherein the conductive layer formed on the second photoresist layer is separated from the conductive layer formed on the first photoresist layer and the exposed substrate. The first and the second photoresist layers are removed while the conductive layer on the second photoresist layer is concurrently being striped. The remaining conductive layer serves as a gate structure.
    Type: Grant
    Filed: August 6, 2003
    Date of Patent: August 31, 2004
    Assignee: Suntek Compound Semiconductor Co., Ltd.
    Inventors: Chin-Tsai Hsu, Chi-Jui Chen, Pang-Miao Liu