Patents by Inventor Chee Chung

Chee Chung 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: 12040423
    Abstract: A micro-light emitting diode (uLED) device comprises: a mesa comprising: a plurality of semiconductor layers including an n-type layer, an active layer, and a p-type layer; a p-contact layer contacting the p-type layer; a cathode contacting the first sidewall of the n-type layer; a first region of dielectric material that insulates the p-contact layer, the active layer, and a first sidewall of the p-type layer from the cathode; an anode contacting the top surface of the p-contact layer; and a second region of dielectric material that insulates the active layer, a second sidewall of the p-type layer, and the second sidewall of the n-type layer from the anode. The top surface of the p-contact layer has a different planar orientation compared to the first and second sidewalls of the n-type layer. Methods of making and using the uLED devices are also provided.
    Type: Grant
    Filed: May 25, 2023
    Date of Patent: July 16, 2024
    Assignee: Lumileds LLC
    Inventors: Yeow Meng Teo, Wee-Hong Ng, Pei-Chee Mah, Chee Chung James Wong, Geok Joo Soh
  • Patent number: 11955583
    Abstract: A micro-light emitting diode (uLED) device comprises: a mesa comprising: a plurality of semiconductor layers including an n-type layer, an active layer, and a p-type layer; a p-contact layer contacting the p-type layer; a cathode contacting the first sidewall of the n-type layer; a first region of dielectric material that insulates the p-contact layer, the active layer, and a first sidewall of the p-type layer from the cathode; an anode contacting the top surface of the p-contact layer; and a second region of dielectric material that insulates the active layer, a second sidewall of the p-type layer, and the second sidewall of the n-type layer from the anode. The top surface of the p-contact layer has a different planar orientation compared to the first and second sidewalls of the n-type layer. Methods of making and using the uLED devices are also provided.
    Type: Grant
    Filed: March 26, 2021
    Date of Patent: April 9, 2024
    Assignee: Lumileds LLC
    Inventors: Yeow Meng Teo, Wee-Hong Ng, Pei-Chee Mah, Chee Chung James Wong, Geok Joo Soh
  • Publication number: 20230299227
    Abstract: A micro-light emitting diode (uLED) device comprises: a mesa comprising: a plurality of semiconductor layers including an n-type layer, an active layer, and a p-type layer; a p-contact layer contacting the p-type layer; a cathode contacting the first sidewall of the n-type layer; a first region of dielectric material that insulates the p-contact layer, the active layer, and a first sidewall of the p-type layer from the cathode; an anode contacting the top surface of the p-contact layer; and a second region of dielectric material that insulates the active layer, a second sidewall of the p-type layer, and the second sidewall of the n-type layer from the anode. The top surface of the p-contact layer has a different planar orientation compared to the first and second sidewalls of the n-type layer. Methods of making and using the uLED devices are also provided.
    Type: Application
    Filed: May 25, 2023
    Publication date: September 21, 2023
    Applicant: Lumileds LLC
    Inventors: Yeow Meng Teo, Wee-Hong Ng, Pei-Chee Mah, Chee Chung James Wong, Geok Joo Soh
  • Patent number: 11705534
    Abstract: A micro-light emitting diode (uLED) device comprises: a mesa comprising: a plurality of semiconductor layers including an n-type layer, an active layer, and a p-type layer; a p-contact layer contacting the p-type layer; a cathode contacting the first sidewall of the n-type layer; a first region of dielectric material that insulates the p-contact layer, the active layer, and a first sidewall of the p-type layer from the cathode; an anode contacting the top surface of the p-contact layer; and a second region of dielectric material that insulates the active layer, a second sidewall of the p-type layer, and the second sidewall of the n-type layer from the anode. The top surface of the p-contact layer has a different planar orientation compared to the first and second sidewalls of the n-type layer. Methods of making and using the uLED devices are also provided.
    Type: Grant
    Filed: March 26, 2021
    Date of Patent: July 18, 2023
    Assignee: Lumileds LLC
    Inventors: Yeow Meng Teo, Wee-Hong Ng, Pei-Chee Mah, Chee Chung James Wong, Geok Joo Soh
  • Publication number: 20230068911
    Abstract: A method of manufacturing a light emitting diode (LED) device includes forming an LED structure by depositing a plurality of semiconductor layers on a transparent substrate. Trenched metal is placed in the plurality of semiconductor layers, with the trenched metal contacting the transparent substrate. The LED structure is attached to a CMOS structure with electrical interconnects that define a cavity therebetween. Laser light is used to provide laser lift-off of the transparent substrate from the plurality of semiconductor layers.
    Type: Application
    Filed: March 1, 2021
    Publication date: March 2, 2023
    Applicant: Lumileds LLC
    Inventors: Dennis Scott, Chee Chung James Wong, Khing Lim Hii, Pei-Chee Mah, Saraswati .,
  • Publication number: 20220173267
    Abstract: A micro-light emitting diode (uLED) device comprises: a mesa comprising: a plurality of semiconductor layers including an n-type layer, an active layer, and a p-type layer; a p-contact layer contacting the p-type layer; a cathode contacting the first sidewall of the n-type layer; a first region of dielectric material that insulates the p-contact layer, the active layer, and a first sidewall of the p-type layer from the cathode; an anode contacting the top surface of the p-contact layer; and a second region of dielectric material that insulates the active layer, a second sidewall of the p-type layer, and the second sidewall of the n-type layer from the anode. The top surface of the p-contact layer has a different planar orientation compared to the first and second sidewalls of the n-type layer. Methods of making and using the uLED devices are also provided.
    Type: Application
    Filed: March 26, 2021
    Publication date: June 2, 2022
    Applicant: Lumileds LLC
    Inventors: Yeow Meng Teo, Wee-Hong Ng, Pei-Chee Mah, Chee Chung James Wong, Geok Joo Soh
  • Publication number: 20220173276
    Abstract: A micro-light emitting diode (uLED) device comprises: a mesa comprising: a plurality of semiconductor layers including an n-type layer, an active layer, and a p-type layer; a p-contact layer contacting the p-type layer; a cathode contacting the first sidewall of the n-type layer; a first region of dielectric material that insulates the p-contact layer, the active layer, and a first sidewall of the p-type layer from the cathode; an anode contacting the top surface of the p-contact layer; and a second region of dielectric material that insulates the active layer, a second sidewall of the p-type layer, and the second sidewall of the n-type layer from the anode. The top surface of the p-contact layer has a different planar orientation compared to the first and second sidewalls of the n-type layer. Methods of making and using the uLED devices are also provided.
    Type: Application
    Filed: March 26, 2021
    Publication date: June 2, 2022
    Applicant: Lumileds LLC
    Inventors: Yeow Meng Teo, Wee-Hong Ng, Pei-Chee Mah, Chee Chung James Wong, Geok Joo Soh
  • Patent number: 10734370
    Abstract: Methods of making semiconductor device packages may involve cutting kerfs in streets between regions of a semiconductor wafer and positioning stacks of semiconductor dice on portions of surfaces of at least some adjacent regions. A protective material may be dispensed only between the stacks of the semiconductor dice, over the exposed remainders of the regions, and in the kerfs. A back side of the semiconductor wafer may be ground to a final thickness, revealing the protective material in the kerfs at a side of the semiconductor wafer opposite the stacks of the semiconductor dice. The protective material between the stacks of the semiconductor dice and within the kerfs may be cut through, leaving the protective material on sides of the semiconductor dice of the stacks and on side surfaces of the regions within the kerfs.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: August 4, 2020
    Assignee: Micron Technology, Inc.
    Inventors: Zhaohui Ma, Wei Zhou, Chee Chung So, Soo Loo Ang, Aibin Yu
  • Publication number: 20190252362
    Abstract: Methods of making semiconductor device packages may involve cutting kerfs in streets between regions of a semiconductor wafer and positioning stacks of semiconductor dice on portions of surfaces of at least some adjacent regions. A protective material may be dispensed only between the stacks of the semiconductor dice, over the exposed remainders of the regions, and in the kerfs. A back side of the semiconductor wafer may be ground to a final thickness, revealing the protective material in the kerfs at a side of the semiconductor wafer opposite the stacks of the semiconductor dice. The protective material between the stacks of the semiconductor dice and within the kerfs may be cut through, leaving the protective material on sides of the semiconductor dice of the stacks and on side surfaces of the regions within the kerfs.
    Type: Application
    Filed: April 26, 2019
    Publication date: August 15, 2019
    Inventors: Zhaohui Ma, Wei Zhou, Chee Chung So, Soo Loo Ang, Aibin Yu
  • Patent number: 10312226
    Abstract: Methods of protecting semiconductor devices may involve cutting partially through a thickness of a semiconductor wafer to form trenches between stacks of semiconductor dice on regions of integrated circuitry of the semiconductor wafer. A protective material may be dispensed into the trenches and to a level at least substantially the same as a height of the stacks of semiconductor dice. Material of the semiconductor wafer may be removed from a back side thereof at least to a depth sufficient to expose the protective material in the trenches. A remaining thickness of the protective material between the stacks of semiconductor dice may be cut through.
    Type: Grant
    Filed: October 9, 2017
    Date of Patent: June 4, 2019
    Assignee: Micron Technology, Inc.
    Inventors: Zhaohui Ma, Wei Zhou, Chee Chung So, Soo Loo Ang, Aibin Yu
  • Patent number: 9966842
    Abstract: At least one aspect is directed to a power supply. The power supply includes one or more unregulated voltage converters. Each unregulated voltage converter includes a switched block producing an output voltage across its output terminals. The power supply includes a voltage supply input coupled to at least one of the unregulated voltage converters, and an unregulated voltage bus coupled to at least one of the unregulated voltage converters. The power supply includes a voltage regulator coupled to the unregulated voltage bus and producing a regulated voltage across its output terminals. The output terminals of the voltage regulator are connected in parallel to the output terminals of at least one of the unregulated voltage converters. This can produce a regulated output voltage across a pair of power supply output terminals.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: May 8, 2018
    Assignee: Google LLC
    Inventors: Shuai Jiang, Chenhao Nan, Xin Li, Chee Chung, Mobashar Yazdani
  • Publication number: 20180033780
    Abstract: Methods of protecting semiconductor devices may involve cutting partially through a thickness of a semiconductor wafer to form trenches between stacks of semiconductor dice on regions of integrated circuitry of the semiconductor wafer. A protective material may be dispensed into the trenches and to a level at least substantially the same as a height of the stacks of semiconductor dice. Material of the semiconductor wafer may be removed from a back side thereof at least to a depth sufficient to expose the protective material in the trenches. A remaining thickness of the protective material between the stacks of semiconductor dice may be cut through.
    Type: Application
    Filed: October 9, 2017
    Publication date: February 1, 2018
    Inventors: Zhaohui Ma, Wei Zhou, Chee Chung So, Soo Loo Ang, Aibin Yu
  • Patent number: 9786643
    Abstract: Methods of protecting semiconductor devices may involve forming trenches in streets between stacks of semiconductor dice on regions of a semiconductor wafer. A protective material may be positioned between the die stacks and in the trenches, after which the wafer is thinned from a side opposite the die stacks to expose the protective material in the trenches. Semiconductor devices comprising stacks of dice and corresponding base semiconductor dice comprising wafer regions are separated from one another by cutting through the protective material along the streets and in the trenches. The protective material covers at least sides of each die stack as well as side surfaces of the corresponding base semiconductor die.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: October 10, 2017
    Assignee: Micron Technology, Inc.
    Inventors: Zhaohui Ma, Wei Zhou, Chee Chung So, Soo Loo Ang, Aibin Yu
  • Patent number: 9622825
    Abstract: A robotic manipulator 100, controller 300 and system for use in flexible endoscopy, the manipulator 100 comprising a flexible member configured to be coupled to an endoscope, and an arm connected to and movable by the flexible member, wherein the flexible member has a first end connected to the arm and a second end connectable to the controller 300 to allow a physical movement of the arm to be controllable by a physical movement of the controller 300.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: April 18, 2017
    Assignees: NATIONAL UNIVERSITY OF SINGAPORE, NANYANG TECHNOLOGICAL UNIVERSITY
    Inventors: Soo Jay Louis Phee, Soon Chiang Low, Khek Yu Ho, Sheung Chee Chung
  • Publication number: 20160013154
    Abstract: Methods of protecting semiconductor devices may involve forming trenches in streets between stacks of semiconductor dice on regions of a semiconductor wafer. A protective material may be positioned between the die stacks and in the trenches, after which the wafer is thinned from a side opposite the die stacks to expose the protective material in the trenches. Semiconductor devices comprising stacks of dice and corresponding base semiconductor dice comprising wafer regions are separated from one another by cutting through the protective material along the streets and in the trenches. The protective material covers at least sides of each die stack as well as side surfaces of the corresponding base semiconductor die.
    Type: Application
    Filed: July 8, 2014
    Publication date: January 14, 2016
    Inventors: Zhaohui Ma, Wei Zhou, Chee Chung So, Soo Loo Ang, Aibin Yu
  • Publication number: 20150157191
    Abstract: A robotic manipulator 100, controller 300 and system for use in flexible endoscopy, the manipulator 100 comprising a flexible member configured to be coupled to an endoscope, and an arm connected to and movable by the flexible member, wherein the flexible member has a first end connected to the arm and a second end connectable to the controller 300 to allow a physical movement of the arm to be controllable by a physical movement of the controller 300.
    Type: Application
    Filed: September 22, 2014
    Publication date: June 11, 2015
    Inventors: Soo Jay Louis Phee, Soon Chiang Low, Khek Yu Ho, Sheung Chee Chung
  • Publication number: 20150118728
    Abstract: According to embodiments of the present invention, an apparatus for separating a biological entity from a sample volume is provided. The apparatus includes an input chamber including an inlet configured to receive the volume sample, and an outlet, at least one magnetic element adjacent a portion of the input chamber, the magnetic element configured to provide a magnetic field in a vicinity of the portion of the input chamber to trap at least some leukocytes from the sample volume, and a filter in fluid communication with the outlet, the filter configured to separate the biological entity. According to further embodiments of the present invention, a method for separating a biological entity from a sample volume is also provided.
    Type: Application
    Filed: April 19, 2013
    Publication date: April 30, 2015
    Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
    Inventors: Abdur Rub Abdur Rahman, Chandran Jegatha, Lakshmi Shankar, Chee Chung Wong
  • Publication number: 20150076049
    Abstract: According to embodiments of the present invention, a microfilter is provided. The microfilter includes a first porous layer and a second porous layer arranged one over the other, wherein the first porous layer includes a plurality of first pores defined through the first porous layer, wherein the second porous layer includes a plurality of second pores defined through the second porous layer, and wherein one or more respective second pores are arranged to at least substantially overlap with each respective first pore such that a respective opening defined between a perimeter of the each respective first pore and a perimeter of each of the one or more respective second pores is smaller than a diameter of each first pore. According to further embodiments of the present invention, an apparatus for separating a biological entity from a sample volume is also provided.
    Type: Application
    Filed: April 19, 2013
    Publication date: March 19, 2015
    Applicant: Agency for Science, Technology and Research
    Inventors: Sunil Kumar Arya, Abdur Rub Abdur Rahman, Chandran Jegatha, Chee Chung Wong
  • Publication number: 20150026271
    Abstract: A system for event notification and information posting (1) comprises a data processing means (2) for receiving the information of an event and merging the event information with a notification, a transmitting means (3) for transmitting the notification to a receiver, a feedback processing means (4) for receiving a feedback from the receiver and filtering the contents of the feedback, a responding means (5) for responding to the feedback from the receiver, an information posting means (6) for posting and displaying the event notification and the feedback from the receiver at a displaying means, and a data storing means (7) for storing the event information, the notification, and the feedback. The system (1) further comprises a reminding means (8) for managing the dates and anniversaries of the event and for reminding the receiver the dates and anniversaries of the event.
    Type: Application
    Filed: February 18, 2014
    Publication date: January 22, 2015
    Applicant: E-OBITUARY SDN BHD
    Inventors: Chee Chung CHEONG, Kevin Boon Keng LEOW, Hon Siang CHUNG
  • Patent number: 8882660
    Abstract: A robotic manipulator controller and system for use in flexible endoscopy, the manipulator comprising a flexible member configured to be coupled to an endoscope, and an arm connected to and movable by the flexible member, wherein the flexible member has a first end connected to the arm and a second end connectable to the controller to allow a physical movement of the arm to be controllable by a physical movement of the controller.
    Type: Grant
    Filed: May 31, 2010
    Date of Patent: November 11, 2014
    Assignees: Nanyang Technological University, National University of Singapore
    Inventors: Soo Jay Louis Phee, Soon Chiang Low, Khek Yu Ho, Sheung Chee Chung