Patents by Inventor Wai Fung

Wai Fung 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: 20250014938
    Abstract: Improved edge rings with flow conductance features are disclosed. The flow conductance features of the edge ring are features added to the edge ring that adjust the flow conductance of gas flowing in the local area of the edge ring. The flow conductance features can adjust the flow conductance to compensate for features on a semiconductor wafer, the edge ring, and in the chamber that may affect the flow of gas in the local areas. The flow conductance may be increased, reduced, or tuned depending on the desired effect.
    Type: Application
    Filed: November 21, 2022
    Publication date: January 9, 2025
    Inventors: Anand Chandrashekar, Leonard Wai Fung Kho, Son Vo Nam Tran, Jared Ahmad Lee, Raul Vyas, Gang L. Liu, Jasmine Lin
  • Patent number: 12163219
    Abstract: Forming a protective coating ex situ in an atomic layer deposition process to coat one or more chamber components subsequently installed in a reaction chamber provides a number of benefits over more conventional coating methods such as in situ deposition of an undercoat. In certain cases the protective coating may have a particular composition such as aluminum oxide, aluminum fluoride, aluminum nitride, yttrium oxide, and/or yttrium fluoride. The protective coating may help reduce contamination on wafers processed using the coated chamber component. Further, the protective coating may act to stabilize the processing conditions within the reaction chamber, thereby achieving very stable/uniform processing results over the course of processing many batches of wafers, and minimizing radical loss. Also described are a number of techniques that may be used to restore the protective coating after the coated chamber component is used to process semiconductor wafers.
    Type: Grant
    Filed: September 7, 2022
    Date of Patent: December 10, 2024
    Assignee: Lam Research Corporation
    Inventors: Damodar Rajaram Shanbhag, Guangbi Yuan, Thadeous Bamford, Curtis Warren Bailey, Tony Kaushal, Krishna Birru, William Schlosser, Bo Gong, Huatan Qiu, Fengyuan Lai, Leonard Wai Fung Kho, Anand Chandrashekar, Andrew H. Breninger, Chen-Hua Hsu, Geoffrey Hohn, Gang Liu, Rohit Khare
  • Patent number: 12113643
    Abstract: A first communication device performs a handshaking procedure with a second communication device, the handshaking procedure associated with transitioning from an active mode to a low power mode. The first communication device transmits data and/or idle symbols to the second communication device i) after completion of the handshake procedure, and ii) at least until the earlier of a) a time period expiring, and b) determining that the second communication device quieted a transmitter of the second communication device. The first communication device transitions to the low power mode in connection with the handshaking procedure.
    Type: Grant
    Filed: November 6, 2023
    Date of Patent: October 8, 2024
    Assignee: Marvel Asia Pte Ltd
    Inventors: Hon Wai Fung, Dance Wu
  • Publication number: 20240276479
    Abstract: A coordinator communication device operates in a communication network according to a communication protocol that defines repeating time cycles and specifies that each of multiple communication devices is provided a respective transmit opportunity in each time cycle. The coordinator communication device determines a number of follower communication devices in a communication network while the follower communication devices are selecting transmit opportunities using respective initial device identifiers. The coordinator communication device determines a quantity of transmit opportunities to be provided in each of multiple time cycles during which the follower communication devices are selecting transmit opportunities using respective new device identifiers. The coordinator communication device determines the quantity of transmit opportunities at least by using the number of follower communication devices.
    Type: Application
    Filed: February 12, 2024
    Publication date: August 15, 2024
    Inventors: Eve Yuhua HUANG, Hon Wai FUNG, Daryl HOOT, Tsungtang WANG, Shruthi GADEY, Van LY, Dance WU
  • Publication number: 20240162224
    Abstract: An III-nitride power semiconductor based heterojunction device comprising a first heterojunction and a second heterojunction transistor, wherein the second heterojunction transistor has a substantially identical structure to the first heterojunction transistor, and wherein the second heterojunction transistor is scaled to a smaller area or gate perimeter than the first heterojunction transistor by a scale factor X, where X is larger than 1.
    Type: Application
    Filed: November 14, 2022
    Publication date: May 16, 2024
    Inventors: Florin Udrea, Loizos Efthymiou, Martin Arnold, John Findlay, Sheung Wai Fung, Tara Vishin, Paul Ryan
  • Publication number: 20240154917
    Abstract: An Ethernet Physical layer (PHY) device includes a PHY interface and PHY circuitry. The PHY interface is configured to connect to a physical link. The PHY circuitry is configured to generate layer-1 frames that carry data for transmission to a peer Ethernet PHY device, to insert among the layer-1 frames one or more management frames that are separate from the layer-1 frames and that are configured to control a General-Purpose Input-Output (GPIO) port associated with the peer Ethernet PHY device, to transmit the layer-1 frames and the inserted management frames, via the PHY interface, to the peer Ethernet PHY device over the physical link, for controlling one or more operations of the GPIO port associated with the peer Ethernet PHY device, and to receive, via the PHY interface, one or more verifications acknowledging that the one or more management frames were received successfully at the peer Ethernet PHY device.
    Type: Application
    Filed: November 19, 2023
    Publication date: May 9, 2024
    Inventors: Jessica Lauren Mann, Christopher Mash, Timothy See-Hung Lau, Hon Wai Fung, Liang Zhu, Dance Wu
  • Publication number: 20240143013
    Abstract: A III-nitride power semiconductor based heterojunction device comprising a substrate, a first terminal, a second terminal, a control terminal configured to receive an input switching signal during an active mode of operation and to not receive the input switching signal during a stand-by mode of operation, and an active heterojunction transistor formed on the substrate.
    Type: Application
    Filed: October 31, 2022
    Publication date: May 2, 2024
    Inventors: Sheung Wai FUNG, Martin ARNOLD, Loizos EFTHYMIOU, Tara VISHIN, John William FINDLAY, Florin UDREA
  • Publication number: 20240129146
    Abstract: A first communication device generates an Operation, Administration, and Maintenance (OAM) frame that includes i) OAM message content and ii) an OAM frame header outside of the OAM message content, wherein generating the OAM frame comprises generating the OAM frame header to include information that signals one of i) a low power sleep (LPS) request, and ii) a wake-up request (WUR). The first communication device transmits the OAM frame to a second communication device via a communication medium to signal to the second communication device the one of i) the LPS request, and ii) the WUR.
    Type: Application
    Filed: December 21, 2023
    Publication date: April 18, 2024
    Inventors: Ming-Tak LEUNG, Bizhan ABEDINZADEH, Hon Wai FUNG, Liang ZHU, Der-Ren CHU
  • Patent number: 11933753
    Abstract: The present application describes a sensor apparatus based on chemically functionalized graphene as the sensing materials. The sensing materials is modified from graphene oxide with unique chemical process to form a group of graphene derivatives, e.g. butylamine, hexylamine, decylamine, dodecylamine, benzylamine etc., to detect volatile and non-volatile compounds, e.g. toluene, ethylacetate, ethanol, acetone, hexane etc. with high sensitivity. Pattern recognition algorithms and methods, e.g. PCA, are coupled with the sensors for detecting and quantifying specific chemical compounds. Methods of using the sensor apparatus in applications such as diagnosis of disease and food quality control are disclosed.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: March 19, 2024
    Inventors: Wan Lung Kam, Wai Fung Cheung, Baishu Liu, Bo Zheng
  • Publication number: 20240073059
    Abstract: A first communication device performs a handshaking procedure with a second communication device, the handshaking procedure associated with transitioning from an active mode to a low power mode. The first communication device transmits data and/or idle symbols to the second communication device i) after completion of the handshake procedure, and ii) at least until the earlier of a) a time period expiring, and b) determining that the second communication device quieted a transmitter of the second communication device. The first communication device transitions to the low power mode in connection with the handshaking procedure.
    Type: Application
    Filed: November 6, 2023
    Publication date: February 29, 2024
    Inventors: Hon Wai FUNG, Dance WU
  • Patent number: 11863468
    Abstract: An Ethernet Physical layer (PHY) device includes a PHY interface and PHY circuitry. The PHY interface is configured to connect to a physical link. The PHY circuitry is configured to generate layer-1 frames that carry data for transmission to a peer Ethernet PHY device, to insert among the layer-1 frames one or more management frames that are separate from the layer-1 frames and that are configured to control a General-Purpose Input-Output (GPIO) port associated with the peer Ethernet PHY device, to transmit the layer-1 frames and the inserted management frames, via the PHY interface, to the peer Ethernet PHY device over the physical link, for controlling one or more operations of the GPIO port associated with the peer Ethernet PHY device, and to receive, via the PHY interface, one or more verifications acknowledging that the one or more management frames were received successfully at the peer Ethernet PHY device.
    Type: Grant
    Filed: April 16, 2020
    Date of Patent: January 2, 2024
    Assignee: MARVELL ASIA PTE LTD
    Inventors: Jessica Lauren Mann, Christopher Mash, Timothy See-Hung Lau, Hon Wai Fung, Liang Zhu, Dance Wu
  • Patent number: 11855791
    Abstract: A first communication device generates an Operation, Administration, and Maintenance (OAM) frame that includes i) OAM message content and ii) an OAM frame header outside of the OAM message content, wherein generating the OAM frame comprises generating the OAM frame header to include information that signals one of i) a low power sleep (LPS) request, and ii) a wake-up request (WUR). The first communication device transmits the OAM frame to a second communication device via a communication medium to signal to the second communication device the one of i) the LPS request, and ii) the WUR.
    Type: Grant
    Filed: October 6, 2021
    Date of Patent: December 26, 2023
    Assignee: Marvell Asia Pte Ltd
    Inventors: Ming-Tak Leung, Bizhan Abedinzadeh, Hon Wai Fung, Liang Zhu, Der-Ren Chu
  • Patent number: 11811551
    Abstract: A first communication device performs a handshaking procedure with a second communication device, the handshaking procedure associated with transitioning from an active mode to a low power mode. The first communication device transmits data and/or idle symbols to the second communication device i) after completion of the handshake procedure, and ii) at least until the earlier of a) a time period expiring, and b) determining that the second communication device quieted a transmitter of the second communication device. The first communication device transitions to the low power mode in connection with the handshaking procedure.
    Type: Grant
    Filed: September 30, 2021
    Date of Patent: November 7, 2023
    Assignee: Marvell Asia Pte Ltd
    Inventors: Hon Wai Fung, Dance Wu
  • Patent number: 11805483
    Abstract: A method for waking up, from a low-power mode, a first communications node coupled to a second node via a first communication link, includes determining, while the first node is awake, a first transmission rate for transmitting data over the first link, storing the first rate at the second node, and selectively transmitting, from the second node to the first node, a first wake-up command at a symbol rate corresponding to the first rate. Where a third node is coupled to the second node via a second link, the method may further include determining, at the second node, while the third node is awake, a second transmission rate for transmitting data over the second link, storing the second rate at the second node, and selectively transmitting, from the second node to the third node, a second wake-up command at a symbol rate corresponding to the second rate.
    Type: Grant
    Filed: December 14, 2021
    Date of Patent: October 31, 2023
    Assignee: Marvell Asia Pte, Ltd.
    Inventors: Hon Wai Fung, Dance Wu, Liang Zhu
  • Patent number: 11784637
    Abstract: The present disclosure relates to an edge detection circuit configured to receive an input signal comprising one or more falling or falling edges and provide an output signal comprising pulses or spikes corresponding to the one or more rising or falling edges. The edge detection circuit comprises a passive differentiator circuit configured to receive an input and provide a differentiator output signal that that is proportional to the rate of change of the input, and a comparator circuit operably connected to a voltage source. The comparator circuit is configured to receive the differentiator output signal, compare the differentiator output signal to a threshold voltage; and output a pulse or spike signal based on the comparison to the threshold voltage.
    Type: Grant
    Filed: May 10, 2022
    Date of Patent: October 10, 2023
    Assignee: CAMBRIDGE GAN DEVICES LIMITED
    Inventors: Sheung Wai Fung, Loizos Efthymiou, Florin Udrea, Martin Arnold
  • Publication number: 20230281388
    Abstract: The invention provides a computer-implemented method for analyzing a piece of text comprising Chinese characters.
    Type: Application
    Filed: December 5, 2022
    Publication date: September 7, 2023
    Inventor: Wai Fung LEUNG
  • Publication number: 20230246098
    Abstract: We describe a smart high voltage/power III-nitride semiconductor based diode or rectifier comprising first and second terminals, and further comprising an active device (e.g. a transistor such as a GaN HEMT transistor), a sensing device (e.g. a sensing diode/transistor), a sensing load (e.g. a resistor), wherein the smart high voltage/power III-nitride semiconductor based diode or rectifier is configured to output a sensing signal corresponding a current through the sensing device and/or a voltage drop across the sensing load, wherein the sensing signal is indicative of a current flowing between the first and second terminal when a bias is applied between the first and second terminals.
    Type: Application
    Filed: January 31, 2022
    Publication date: August 3, 2023
    Inventors: Florin Udrea, Martin Arnold, Loizos Efthymiou, Giorgia Longobardi, Sheung Wai Fung
  • Publication number: 20230210869
    Abstract: The present disclosure relates to compositions including a phenylbutyrate compound and a bile acid, and methods of processing such compositions.
    Type: Application
    Filed: December 8, 2022
    Publication date: July 6, 2023
    Inventors: Joshua Cohen, Justin Klee, David Wai Fung Ma
  • Patent number: 11695490
    Abstract: A second device receives a first synchronization signal transmitted by a first device for training synchronization between the second device and the first device. The second device then transmits one or more initial synchronization response signals to the first device. The one or more initial synchronization response signals are from among a fixed number of synchronization response signals that the second device is configured to transmit to the first device. After transmission of the one or more initial synchronization response signals, the second device receives a second synchronization signal from the first device. After receiving the second synchronization signal, the second device continues transmission of synchronization response signals to the first device until the fixed number of synchronization response signals are transmitted from the second device to the first device.
    Type: Grant
    Filed: September 24, 2021
    Date of Patent: July 4, 2023
    Assignee: Marvell Asia Pte Ltd
    Inventors: Shaoan Dai, Hon Wai Fung, Xing Wu, Dance Wu
  • Publication number: 20230131602
    Abstract: A heterojunction device having at least three terminals, the at least three terminals comprising a high voltage terminal, a low voltage terminal and a control terminal. The heterojunction device further comprises at least one main power heterojunction transistor, an auxiliary gate circuit comprising at least one first low-voltage heterojunction transistor, a pull-down circuit comprising a capacitor and a charging path for the capacitor. The heterojunction device further comprises at least one monolithically integrated component, wherein the capacitor is configured to provide an internal rail voltage for the at least one monolithically integrated component.
    Type: Application
    Filed: October 31, 2022
    Publication date: April 27, 2023
    Inventors: Martin ARNOLD, Sheung Wai FUNG, Loizos EFTHYMIOU, Florin UDREA, John William FINDLAY