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).
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Patent number: 12040423Abstract: 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: GrantFiled: May 25, 2023Date of Patent: July 16, 2024Assignee: Lumileds LLCInventors: Yeow Meng Teo, Wee-Hong Ng, Pei-Chee Mah, Chee Chung James Wong, Geok Joo Soh
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Patent number: 11955583Abstract: 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: GrantFiled: March 26, 2021Date of Patent: April 9, 2024Assignee: Lumileds LLCInventors: Yeow Meng Teo, Wee-Hong Ng, Pei-Chee Mah, Chee Chung James Wong, Geok Joo Soh
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Publication number: 20230299227Abstract: 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: ApplicationFiled: May 25, 2023Publication date: September 21, 2023Applicant: Lumileds LLCInventors: Yeow Meng Teo, Wee-Hong Ng, Pei-Chee Mah, Chee Chung James Wong, Geok Joo Soh
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Patent number: 11705534Abstract: 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: GrantFiled: March 26, 2021Date of Patent: July 18, 2023Assignee: Lumileds LLCInventors: Yeow Meng Teo, Wee-Hong Ng, Pei-Chee Mah, Chee Chung James Wong, Geok Joo Soh
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Publication number: 20230068911Abstract: 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: ApplicationFiled: March 1, 2021Publication date: March 2, 2023Applicant: Lumileds LLCInventors: Dennis Scott, Chee Chung James Wong, Khing Lim Hii, Pei-Chee Mah, Saraswati .,
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Publication number: 20220173267Abstract: 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: ApplicationFiled: March 26, 2021Publication date: June 2, 2022Applicant: Lumileds LLCInventors: Yeow Meng Teo, Wee-Hong Ng, Pei-Chee Mah, Chee Chung James Wong, Geok Joo Soh
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Publication number: 20220173276Abstract: 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: ApplicationFiled: March 26, 2021Publication date: June 2, 2022Applicant: Lumileds LLCInventors: Yeow Meng Teo, Wee-Hong Ng, Pei-Chee Mah, Chee Chung James Wong, Geok Joo Soh
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Patent number: 10734370Abstract: 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: GrantFiled: April 26, 2019Date of Patent: August 4, 2020Assignee: Micron Technology, Inc.Inventors: Zhaohui Ma, Wei Zhou, Chee Chung So, Soo Loo Ang, Aibin Yu
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Publication number: 20190252362Abstract: 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: ApplicationFiled: April 26, 2019Publication date: August 15, 2019Inventors: Zhaohui Ma, Wei Zhou, Chee Chung So, Soo Loo Ang, Aibin Yu
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Patent number: 10312226Abstract: 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: GrantFiled: October 9, 2017Date of Patent: June 4, 2019Assignee: Micron Technology, Inc.Inventors: Zhaohui Ma, Wei Zhou, Chee Chung So, Soo Loo Ang, Aibin Yu
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Patent number: 9966842Abstract: 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: GrantFiled: August 16, 2017Date of Patent: May 8, 2018Assignee: Google LLCInventors: Shuai Jiang, Chenhao Nan, Xin Li, Chee Chung, Mobashar Yazdani
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Publication number: 20180033780Abstract: 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: ApplicationFiled: October 9, 2017Publication date: February 1, 2018Inventors: Zhaohui Ma, Wei Zhou, Chee Chung So, Soo Loo Ang, Aibin Yu
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Patent number: 9786643Abstract: 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: GrantFiled: July 8, 2014Date of Patent: October 10, 2017Assignee: Micron Technology, Inc.Inventors: Zhaohui Ma, Wei Zhou, Chee Chung So, Soo Loo Ang, Aibin Yu
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Patent number: 9622825Abstract: 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: GrantFiled: September 22, 2014Date of Patent: April 18, 2017Assignees: NATIONAL UNIVERSITY OF SINGAPORE, NANYANG TECHNOLOGICAL UNIVERSITYInventors: Soo Jay Louis Phee, Soon Chiang Low, Khek Yu Ho, Sheung Chee Chung
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Publication number: 20160013154Abstract: 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: ApplicationFiled: July 8, 2014Publication date: January 14, 2016Inventors: Zhaohui Ma, Wei Zhou, Chee Chung So, Soo Loo Ang, Aibin Yu
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Publication number: 20150157191Abstract: 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: ApplicationFiled: September 22, 2014Publication date: June 11, 2015Inventors: Soo Jay Louis Phee, Soon Chiang Low, Khek Yu Ho, Sheung Chee Chung
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Publication number: 20150118728Abstract: 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: ApplicationFiled: April 19, 2013Publication date: April 30, 2015Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCHInventors: Abdur Rub Abdur Rahman, Chandran Jegatha, Lakshmi Shankar, Chee Chung Wong
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Publication number: 20150076049Abstract: 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: ApplicationFiled: April 19, 2013Publication date: March 19, 2015Applicant: Agency for Science, Technology and ResearchInventors: Sunil Kumar Arya, Abdur Rub Abdur Rahman, Chandran Jegatha, Chee Chung Wong
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Publication number: 20150026271Abstract: 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: ApplicationFiled: February 18, 2014Publication date: January 22, 2015Applicant: E-OBITUARY SDN BHDInventors: Chee Chung CHEONG, Kevin Boon Keng LEOW, Hon Siang CHUNG
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Patent number: 8882660Abstract: 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: GrantFiled: May 31, 2010Date of Patent: November 11, 2014Assignees: Nanyang Technological University, National University of SingaporeInventors: Soo Jay Louis Phee, Soon Chiang Low, Khek Yu Ho, Sheung Chee Chung