Patents by Inventor Pang-Hsuan Liu

Pang-Hsuan 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: 20230102368
    Abstract: A first dielectric layer is formed over upper and side surfaces of a semiconductor fin structure. A mask layer is formed over a first portion of the first dielectric layer disposed over the upper surface of the fin structure. The mask layer and the first dielectric layer have different material compositions. Second portions of the first dielectric layer disposed on side surfaces of the fin structure are etched. The mask layer protects the first portion of the first dielectric layer from being etched. A second dielectric layer is formed over the mask layer and the side surfaces of the fin structure. An oxidation process is performed to convert the mask layer into a dielectric material having substantially a same material composition as the first or second dielectric layer. The dielectric material and remaining portions of the first or second dielectric layer collectively serve as a gate dielectric of a transistor.
    Type: Application
    Filed: December 5, 2022
    Publication date: March 30, 2023
    Inventors: Pang-Hsuan Liu, Kuan-Lin Yeh, Chun-Sheng Liang, Hsin-Che Chiang
  • Patent number: 11521971
    Abstract: A first dielectric layer is formed over upper and side surfaces of a semiconductor fin structure. A mask layer is formed over a first portion of the first dielectric layer disposed over the upper surface of the fin structure. The mask layer and the first dielectric layer have different material compositions. Second portions of the first dielectric layer disposed on side surfaces of the fin structure are etched. The mask layer protects the first portion of the first dielectric layer from being etched. A second dielectric layer is formed over the mask layer and the side surfaces of the fin structure. An oxidation process is performed to convert the mask layer into a dielectric material having substantially a same material composition as the first or second dielectric layer. The dielectric material and remaining portions of the first or second dielectric layer collectively serve as a gate dielectric of a transistor.
    Type: Grant
    Filed: November 13, 2020
    Date of Patent: December 6, 2022
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
    Inventors: Pang-Hsuan Liu, Kuan-Lin Yeh, Chun-Sheng Liang, Hsin-Che Chiang
  • Publication number: 20220157812
    Abstract: A first dielectric layer is formed over upper and side surfaces of a semiconductor fin structure. A mask layer is formed over a first portion of the first dielectric layer disposed over the upper surface of the fin structure. The mask layer and the first dielectric layer have different material compositions. Second portions of the first dielectric layer disposed on side surfaces of the fin structure are etched. The mask layer protects the first portion of the first dielectric layer from being etched. A second dielectric layer is formed over the mask layer and the side surfaces of the fin structure. An oxidation process is performed to convert the mask layer into a dielectric material having substantially a same material composition as the first or second dielectric layer. The dielectric material and remaining portions of the first or second dielectric layer collectively serve as a gate dielectric of a transistor.
    Type: Application
    Filed: November 13, 2020
    Publication date: May 19, 2022
    Inventors: Pang-Hsuan Liu, Kuan-Lin Yeh, Chun-Sheng Liang, Hsin-Che Chiang
  • Patent number: 8657478
    Abstract: A backlight module includes a light guide plate, a light source disposed at a side of the light guide plate, a diffuser sheet positioned over the light guide plate but not directly contacting the light guide plate, and a light mixing space positioned between the light guide plate and the diffuser sheet so that light emitted from the light guide plate mixes in the light mixing space before being emitted out of the backlight module.
    Type: Grant
    Filed: March 20, 2013
    Date of Patent: February 25, 2014
    Assignee: AU Optronics Corp.
    Inventor: Pang-Hsuan Liu
  • Patent number: 8408776
    Abstract: A backlight module includes a light guide plate, a light source disposed at a side of the light guide plate, a diffuser sheet positioned over the light guide plate but not directly contacting the light guide plate, and a light mixing space positioned between the light guide plate and the diffuser sheet so that light emitted from the light guide plate efficiently mixes in the light mixing space before entering the diffuser sheet and being emitted out of the backlight module.
    Type: Grant
    Filed: November 12, 2009
    Date of Patent: April 2, 2013
    Assignee: AU Optronics Corp.
    Inventor: Pang-Hsuan Liu
  • Patent number: 7901100
    Abstract: A backlight module unit and a backlight module are provided. The backlight module unit includes a first light source, a second light source, and an optical barrier. A light source interval is defined between the first light source and the second light source, while a barrier interval is defined between the optical barrier and the second light source. Because the barrier interval is substantially shorter than a half of the light source interval, the backlight module unit mixes the light evenly, and prevents the dark bands from forming due to the disposition of the optical barrier. Thereby, the backlight module that comprises the plural aforesaid backlight units will have no dark bands, mix light evenly, and be thin overall.
    Type: Grant
    Filed: May 6, 2008
    Date of Patent: March 8, 2011
    Assignee: AU Optronics Corp.
    Inventors: Ci-Guang Peng, Chung Peng, Chih-Kuang Chen, Pang-Hsuan Liu
  • Publication number: 20100061116
    Abstract: A backlight module includes a light guide plate, a light source disposed at a side of the light guide plate, a diffuser sheet positioned over the light guide plate but not directly contacting the light guide plate, and a light mixing space positioned between the light guide plate and the diffuser sheet so that light emitted from the light guide plate efficiently mixes in the light mixing space before entering the diffuser sheet and being emitted out of the backlight module.
    Type: Application
    Filed: November 12, 2009
    Publication date: March 11, 2010
    Inventor: Pang Hsuan Liu
  • Patent number: 7658530
    Abstract: A backlight module includes a light guide plate, a light source disposed at a side of the light guide plate, a diffuser sheet positioned over the light guide plate but not directly contacting the light guide plate, and a light mixing space positioned between the light guide plate and the diffuser sheet so that light emitted from the light guide plate efficiently mixes in the light mixing space before entering the diffuser sheet and emitted out of the backlight module.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: February 9, 2010
    Assignee: AU Optronics Corp.
    Inventor: Pang-Hsuan Liu
  • Patent number: 7604387
    Abstract: A backlight module has a light guide plate and a light source. The light guide plate contains a top plane, a bottom plane opposite to the top plane, a light entrance plane positioned between the top plane and the bottom plane, and a widened edge plane opposite to the light entrance plane. The widened edge plane is slanted relative to the light entrance plane.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: October 20, 2009
    Assignee: AU Optronics Corp.
    Inventor: Pang-Hsuan Liu
  • Patent number: 7591577
    Abstract: A light emitting device adapted for a backlight module of a liquid crystal display is disclosed. The light emitting device comprises a plurality of light emitting units and a light guiding plate having a central portion and at least one side portion. Each of the light emitting units has a luminous surface and the light guiding plate has a plurality of light incident structures. Each of the light incident structures has a light incident surface opposite to the corresponding luminous surface, and a reflective surface forming an included angle with the light incident surface. Light emitted from each of the light emitting units passes through the light incident surface, is totally reflected by the reflective surface and enters into the central portion of the light guiding plate. The mixed reflective light run into the central portion of the light guiding plate and deflects outward to a user's side.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: September 22, 2009
    Assignee: Au Optronics Corp.
    Inventors: Pang-Hsuan Liu, Mei-Fen Lin
  • Publication number: 20090185371
    Abstract: A backlight module unit and a backlight module are provided. The backlight module unit includes a first light source, a second light source, and an optical barrier. A light source interval is defined between the first light source and the second light source, while a barrier interval is defined between the optical barrier and the second light source. Because the barrier interval is substantially shorter than a half of the light source interval, the backlight module unit mixes the light evenly, and prevents the dark bands from forming due to the disposition of the optical barrier. Thereby, the backlight module that comprises the plural aforesaid backlight units will have no dark bands, mix light evenly, and be thin overall.
    Type: Application
    Filed: May 6, 2008
    Publication date: July 23, 2009
    Applicant: AU OPTRONICS CORP.
    Inventors: Ci-Guang Peng, Chung Peng, Chih-Kuang Chen, Pang-Hsuan Liu
  • Patent number: 7441925
    Abstract: A method for assembling light emitting diode units and a substrate in a light source module and a structure thereof are provided. The light emitting diode unit is made of a light emitting diode and a carrier. Every light emitting diode has a flanged profile in the bottom to form a leaned plane, and a corresponding hole is formed on the substrate. Hence, when the light emitting diodes are pressed on the surface of a radiator by the substrate to make a closer contact, the light emitting diodes will be able to bear the pressure by the flanged design.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: October 28, 2008
    Assignee: AU Optronics Corporation
    Inventors: Shen-Hong Chou, Pang-Hsuan Liu
  • Publication number: 20080259635
    Abstract: A backlight module has a light guide plate and a light source. The light guide plate contains a top plane, a bottom plane opposite to the top plane, a light entrance plane positioned between the top plane and the bottom plane, and a widened edge plane opposite to the light entrance plane. The widened edge plane is slanted relative to the light entrance plane.
    Type: Application
    Filed: July 31, 2007
    Publication date: October 23, 2008
    Inventor: Pang-Hsuan Liu
  • Publication number: 20080137364
    Abstract: A backlight module includes a light guide plate, a light source disposed at a side of the light guide plate, a diffuser sheet positioned over the light guide plate but not directly contacting the light guide plate, and a light mixing space positioned between the light guide plate and the diffuser sheet so that light emitted from the light guide plate efficiently mixes in the light mixing space before entering the diffuser sheet and emitted out of the backlight module.
    Type: Application
    Filed: May 30, 2007
    Publication date: June 12, 2008
    Inventor: Pang-Hsuan Liu
  • Patent number: 7377680
    Abstract: A light spreading device and a backlight module utilizing the same. The backlight module includes a light guide, a plurality of point lights, and a plurality of light spreading devices. The light guide includes an entrance surface. The point lights are disposed near the entrance surface. Each light spreading device, corresponding to one of the point lights, is disposed between the light guide and the corresponding point light.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: May 27, 2008
    Assignee: AU Optronics Corp.
    Inventors: Jing-Huan Liao, Mei-Fen Lin, Pang-Hsuan Liu, Chih-Lin Wang
  • Patent number: 7374306
    Abstract: A device for fastening the lighting units in a backlight module is provided. A rigid board partially laps over the adjacent lighting unit or units. The rigid board and the backboard have holes respectively such that a bolt is passed through the holes and locked on a nut. Accordingly the rigid board exerts a compressing strength to fasten the adjacent lighting unit or units onto the backboard.
    Type: Grant
    Filed: July 15, 2005
    Date of Patent: May 20, 2008
    Assignee: Au Optronics Corporation
    Inventor: Pang-Hsuan Liu
  • Publication number: 20070177070
    Abstract: A light emitting device adapted for a backlight module of a liquid crystal display is disclosed. The light emitting device comprises a plurality of light emitting units and a light guiding plate having a central portion and at least one side portion. Each of the light emitting units has a luminous surface and the light guiding plate has a plurality of light incident structures. Each of the light incident structures has a light incident surface opposite to the corresponding luminous surface, and a reflective surface forming an included angle with the light incident surface. Light emitted from each of the light emitting units passes through the light incident surface, is totally reflected by the reflective surface and enters into the central portion of the light guiding plate. The mixed reflective light run into the central portion of the light guiding plate and deflects outward to a user's side.
    Type: Application
    Filed: June 28, 2006
    Publication date: August 2, 2007
    Inventors: Pang-Hsuan Liu, Mei-Fen Lin
  • Patent number: 7229194
    Abstract: This invention discloses a direct-type backlight unit structure, which at least comprises at least one light generation component and at least one reflection mirror. The light generation component is used to generate a light and the reflection mirror is set in a side of the light generation component, wherein the reflection mirror faces to the light generation component to form a paraboloid and the paraboloid extends till a top of the light generation component. The reflection mirror can also be set on the top of the light generation component, and faces to the light generation component to form two paraboloids from a center line of the top of the light generation component. The light generated from the light generation component, especially the upward light, can be reflected by the reflection mirror to turn toward the side direction, and finally intermix uniformly in a mixed space, and pass through a light emitting surface to form a uniform backlight.
    Type: Grant
    Filed: September 6, 2005
    Date of Patent: June 12, 2007
    Assignee: Au Optronics Corporation
    Inventors: Pang-Hsuan Liu, Mei-Fen Lin
  • Publication number: 20060274550
    Abstract: This invention discloses a direct-type backlight unit structure, which at least comprises at least one light generation component and at least one reflection mirror. The light generation component is used to generate a light and the reflection mirror is set in a side of the light generation component, wherein the reflection mirror faces to the light generation component to form a paraboloid and the paraboloid extends till a top of the light generation component. The reflection mirror can also be set on the top of the light generation component, and faces to the light generation component to form two paraboloids from a center line of the top of the light generation component. The light generated from the light generation component, especially the upward light, can be reflected by the reflection mirror to turn toward the side direction, and finally intermix uniformly in a mixed space, and pass through a light emitting surface to form a uniform backlight.
    Type: Application
    Filed: September 6, 2005
    Publication date: December 7, 2006
    Inventors: Pang-Hsuan Liu, Mei-Fen Lin
  • Publication number: 20060274528
    Abstract: A method for assembling light emitting diode units and a substrate in a light source module and a structure thereof are provided. The light emitting diode unit is made of a light emitting diode and a carrier. Every light emitting diode has a flanged profile in the bottom to form a leaned plane, and a corresponding hole is formed on the substrate. Hence, when the light emitting diodes are pressed on the surface of a radiator by the substrate to make a closer contact, the light emitting diodes will be able to bear the pressure by the flanged design.
    Type: Application
    Filed: December 14, 2005
    Publication date: December 7, 2006
    Applicant: AU OPTRONICS CORPORATION
    Inventors: Shen-Hong Chou, Pang-Hsuan Liu