Patents by Inventor Yung-Chang Chang

Yung-Chang Chang 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: 20210376282
    Abstract: In some embodiments, the present disclosure relates to a display device that includes a first reflector electrode and a second reflector electrode that is separated from the first reflector electrode. The display device further includes an isolation structure that overlies the first and second reflector electrodes. The isolation structure includes a first and second portion. The first portion overlies the first reflector electrode and has a first thickness. The second portion overlies the second reflector electrode, has a second thickness greater than the first thickness, and is separated from the first portion of the isolation structure. The display device also includes a first optical emitter structure and a second optical emitter structure that respectively overlie the first portion and the second portion of the isolation structure.
    Type: Application
    Filed: May 27, 2020
    Publication date: December 2, 2021
    Inventors: Yung-Chang Chang, Ming Chyi Liu
  • Publication number: 20210328174
    Abstract: In some embodiments, the present disclosure relates to a method that includes forming an isolation structure over a reflector electrode and forming a protective layer over the isolation structure. Further, a first removal process is performed to form a first opening in the protective layer and the isolation structure to expose a first surface of the reflector electrode. A cleaning process is performed to clean the first surface of the reflector electrode. A conductive layer is formed over the protective layer and within the first opening. The conductive layer includes a different material than the protective layer. A second removal process is performed to remove peripheral portions of the protective layer and the conductive layer to form a via structure within the opening, extending through the isolation structure to contact the reflector electrode, and including the protective layer and the conductive layer.
    Type: Application
    Filed: June 29, 2021
    Publication date: October 21, 2021
    Inventors: Yung-Chang Chang, Ming Chyi Liu
  • Patent number: 11143817
    Abstract: A semiconductor structure is disclosed. The semiconductor structure includes: a substrate and a gate element over the substrate. The gate element includes: a gate dielectric layer over the substrate; a gate electrode over the gate dielectric layer; and a waveguide passing through the gate electrode from a top surface of the gate electrode to a bottom surface of the gate electrode. A manufacturing method of the same is also disclosed.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: October 12, 2021
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
    Inventors: Yung-Chang Chang, Chung-Yen Chou, Ming-Chyi Liu, Shih-Chang Liu
  • Publication number: 20210271023
    Abstract: Various embodiments of the present disclosure are directed towards an integrated chip including a protective ring structure overlying a grating coupler structure. A waveguide structure is disposed within a semiconductor substrate and comprises the grating coupler structure. An interconnect structure overlies the semiconductor substrate. The interconnect structure includes a contact etch stop layer (CESL) and a conductive contact over the semiconductor substrate. The conductive contact extends through the CESL. The protective ring structure extends through the CESL and has an upper surface aligned with an upper surface of the conductive contact.
    Type: Application
    Filed: March 2, 2020
    Publication date: September 2, 2021
    Inventors: Yung-Chang Chang, Meng-Han Lin
  • Patent number: 11088014
    Abstract: An embodiment is a method. The method includes: dispensing a plurality of precursor materials over a collective wafer platter holding a plurality of wafers; heating the collective wafer platter while dispensing the precursor materials; rotating the collective wafer platter around a first axis while dispensing the precursor materials and heating the collective wafer platter; rotating the wafers around respective second axes while dispensing the precursor materials and heating the collective wafer platter, the first axis different from each of the second axes; and singulating integrated circuit devices from each of the wafers.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: August 10, 2021
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventor: Yung-Chang Chang
  • Patent number: 11069873
    Abstract: In some embodiments, the present disclosure relates to a display device that includes an isolation structure disposed over a reflector electrode, a transparent electrode disposed over the isolation structure, an optical emitter structure disposed over the transparent electrode, and a via structure. The via structure extends from the transparent electrode at a top surface of the isolation structure to a top surface of the reflector electrode. The via structure includes a center horizontal segment that contacts the top surface of the reflector electrode, a sidewall vertical segment that contacts an inner sidewall of the isolation structure, and an upper horizontal segment that is connected to the center horizontal segment by the sidewall vertical segment. The upper horizontal segment is thicker than the center horizontal segment.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: July 20, 2021
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Yung-Chang Chang, Ming Chyi Liu
  • Patent number: 11051045
    Abstract: A method and a circuit for adaptive loop filtering in a video coding system are described. The method can include receiving a block of samples generated from a previous-stage filter circuit in a filter pipeline, the block of samples being one of multiple blocks included in a current picture, performing, in parallel, adaptive loop filter (ALF) processing for multiple target samples in the block of samples, while the previous-stage filter circuit is simultaneously processing another block in the current picture, storing, in a buffer, first samples each having a filter input area defined by a filter shape that includes at least one sample which has not been received, and storing, in the buffer, second samples included in the filter input areas of the first samples.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: June 29, 2021
    Assignee: MEDIATEK INC.
    Inventors: Ping Chao, Chih-Ming Wang, Yung-Chang Chang
  • Patent number: 11025947
    Abstract: A motion vector (MV) projection method includes generating motion field motion vectors (MFMVs) for a first portion of a current frame by applying MV projection to MVs of a portion of each of reference frames and storing the MFMVs of the first portion of the current frame into an MFMV buffer, and generating MFMVs for a second portion of the current frame by applying MV projection to MVs of a portion of each of the reference frames and storing the MFMVs of the second portion of the current frame into the MFMV buffer. The second portion does not overlap the first portion. Before generating the MFMVs for the second portion of the current frame is done, at least one of the MFMVs of the first portion is read from the MFMV buffer and involved in motion vector determination of at least one coding block included in the first portion.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: June 1, 2021
    Assignee: MEDIATEK INC.
    Inventors: Yung-Chang Chang, Chia-Yun Cheng, Cheng-Han Li, Hong-Cheng Lin, Chi-Hung Chen
  • Patent number: 10984832
    Abstract: A video processing system includes a storage device, a receiving circuit, an audio/video demultiplexing circuit, a video decoder, and a display engine. The storage device includes a data buffer, a bitstream buffer, and a display buffer. An output of the receiving circuit is written into the data buffer. An input of the audio/video demultiplexing circuit is read from the data buffer, and an output of the audio/video demultiplexing circuit is written into the bitstream buffer. An input of the video decoder is read from the bitstream buffer, and an output of the video decoder is written into the display buffer. An input of the display engine is read from the display buffer. Each of the data buffer, the bitstream buffer, and the display buffer is a ring buffer.
    Type: Grant
    Filed: January 5, 2020
    Date of Patent: April 20, 2021
    Assignee: MEDIATEK INC.
    Inventors: Ming-Long Wu, Chia-Yun Cheng, Yung-Chang Chang
  • Publication number: 20210111366
    Abstract: In some embodiments, the present disclosure relates to a display device that includes an isolation structure disposed over a reflector electrode, a transparent electrode disposed over the isolation structure, an optical emitter structure disposed over the transparent electrode, and a via structure. The via structure extends from the transparent electrode at a top surface of the isolation structure to a top surface of the reflector electrode. The via structure includes a center horizontal segment that contacts the top surface of the reflector electrode, a sidewall vertical segment that contacts an inner sidewall of the isolation structure, and an upper horizontal segment that is connected to the center horizontal segment by the sidewall vertical segment. The upper horizontal segment is thicker than the center horizontal segment.
    Type: Application
    Filed: October 15, 2019
    Publication date: April 15, 2021
    Inventors: Yung-Chang Chang, Ming Chyi Liu
  • Publication number: 20210098524
    Abstract: Various embodiments of the present disclosure are directed towards a method for forming an image sensor in which a device layer has high crystalline quality. According to some embodiments, a hard mask layer is deposited covering a substrate. A first etch is performed into the hard mask layer and the substrate to form a cavity. A second etch is performed to remove crystalline damage from the first etch and to laterally recess the substrate in the cavity so the hard mask layer overhangs the cavity. A sacrificial layer is formed lining cavity, a blanket ion implantation is performed into the substrate through the sacrificial layer, and the sacrificial layer is removed. An interlayer is epitaxially grown lining the cavity and having a top surface underlying the hard mask layer, and a device layer is epitaxially grown filling the cavity over the interlayer. A photodetector is formed in the device layer.
    Type: Application
    Filed: June 10, 2020
    Publication date: April 1, 2021
    Inventors: Po-Chun Liu, Yung-Chang Chang, Eugene I-Chun Chen
  • Patent number: 10939102
    Abstract: A post processing apparatus includes a super-resolution (SR) filtering circuit and a loop restoration (LR) filtering circuit. The SR filtering circuit applies SR filtering to a processing result of a preceding circuit. The LR filtering circuit applies LR filtering to a processing result of the SR filtering circuit. Before the SR filtering circuit finishes SR filtering of all pixels of a frame that are generated by the preceding circuit, the LR filtering circuit starts LR filtering of pixels that are derived from applying SR filtering to pixels included in the frame.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: March 2, 2021
    Assignee: MEDIATEK INC.
    Inventors: Yung-Chang Chang, Chih-Ming Wang, Chia-Yun Cheng, Chi-Hung Chen, Kai-Chun Lin, Chih-Wen Yang, Hsuan-Wen Peng
  • Patent number: 10805611
    Abstract: A method and apparatus for video encoding or decoding used by a video encoder or decoder respectively. In one method, input data associated with a video sequence are received. A current sequence header for a current picture is determined. Whether the current sequence header corresponds to a first sequence header or a second sequence header is determined. If the current sequence header corresponds to the second sequence header, one or more syntax values of a syntax set associated with the first sequence header are assigned to corresponding one or more syntax values of the syntax set associated with the current sequence header. The current picture is then encoded or decoded according to the current sequence header.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: October 13, 2020
    Assignee: MediaTek Inc.
    Inventors: Min-Hao Chiu, Hsiu-Yi Lin, Chia-yun Cheng, Chih-Ming Wang, Yung-Chang Chang
  • Patent number: 10778980
    Abstract: An entropy decoding apparatus includes an entropy decoding circuit, a pre-fetch circuit, and a context pre-load buffer. The pre-fetch circuit pre-fetches at least one candidate context for entropy decoding of a part of an encoded bitstream of a frame before the entropy decoding circuit starts entropy decoding of the part of the encoded bitstream of the frame. The context pre-load buffer buffers the at least one candidate context. When a target context actually needed by entropy decoding of the part of the encoded bitstream of the frame is not available in the context pre-load buffer, the context pre-load buffer instructs the pre-fetch circuit to re-fetch the target context, and the entropy decoding circuit stalls entropy decoding of the part of the encoded bitstream of the frame.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: September 15, 2020
    Assignee: MEDIATEK INC.
    Inventors: Ming-Long Wu, Chia-Yun Cheng, Yung-Chang Chang
  • Patent number: 10771163
    Abstract: A decoding apparatus is used for decoding region of interest (ROI) regions in an image, and includes a storage device, a pre-processing circuit, a decoding circuit, and an information fetching circuit. The pre-processing circuit performs a syntax pre-parsing operation upon a bitstream to obtain necessary information of the ROI regions, and stores the necessary information into the storage device. The decoding circuit performs a decoding operation upon the bitstream to decode the ROI regions, wherein the decoding operation includes syntax parsing of the bitstream. The information fetching circuit reads and analyzes the necessary information, and delivers at least a portion of the necessary information to the decoding circuit. A processing time of obtaining necessary information of one ROI region at the pre-processing circuit overlaps a processing time of decoding another ROI region at the decoding circuit.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: September 8, 2020
    Assignee: MEDIATEK INC.
    Inventors: Min-Hao Chiu, Chia-Yun Cheng, Yung-Chang Chang
  • Publication number: 20200213624
    Abstract: Aspects of the disclosure provide a method and a circuit for adaptive loop filtering in a video coding system. The method can include receiving a block of samples generated from a previous-stage filter circuit in a filter pipeline, the block of samples being one of multiple blocks included in a current picture, performing, in parallel, adaptive loop filter (ALF) processing for multiple target samples in the block of samples, while the previous-stage filter circuit is simultaneously processing another block in the current picture, storing, in a buffer, first samples each having a filter input area defined by a filter shape that includes at least one sample which has not been received, and storing, in the buffer, second samples included in the filter input areas of the first samples.
    Type: Application
    Filed: March 11, 2020
    Publication date: July 2, 2020
    Applicant: MEDIATEK INC.
    Inventors: Ping Chao, Chih-Ming Wang, Yung-Chang Chang
  • Publication number: 20200177909
    Abstract: A motion vector (MV) projection method includes generating motion field motion vectors (MFMVs) for a first portion of a current frame by applying MV projection to MVs of a portion of each of reference frames and storing the MFMVs of the first portion of the current frame into an MFMV buffer, and generating MFMVs for a second portion of the current frame by applying MV projection to MVs of a portion of each of the reference frames and storing the MFMVs of the second portion of the current frame into the MFMV buffer. The second portion does not overlap the first portion. Before generating the MFMVs for the second portion of the current frame is done, at least one of the MFMVs of the first portion is read from the MFMV buffer and involved in motion vector determination of at least one coding block included in the first portion.
    Type: Application
    Filed: November 26, 2019
    Publication date: June 4, 2020
    Inventors: Yung-Chang Chang, Chia-Yun Cheng, Cheng-Han Li, Hong-Cheng Lin, Chi-Hung Chen
  • Patent number: 10659794
    Abstract: A palette decoding apparatus includes a palette color storage device which stores palette colors, a color index storage device which stores color indices of pixels, and a palette value processing circuit which generates a palette value for each pixel by reading data from the color index storage device and the palette color storage device. A frame is divided into first coding units, and each first coding unit is sub-divided into one or more second coding units. Before a palette value of a last pixel in a first coding unit is generated by the palette value processing circuit, a palette value of a non-last pixel in the first coding unit is generated by the palette value processing circuit and used by a reconstruction circuit of the video decoder.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: May 19, 2020
    Assignee: MEDIATEK INC.
    Inventors: Chi-Min Chen, Min-Hao Chiu, Chia-Yun Cheng, Yung-Chang Chang
  • Publication number: 20200154108
    Abstract: An entropy decoding apparatus includes an entropy decoding circuit, a pre-fetch circuit, and a context pre-load buffer. The pre-fetch circuit pre-fetches at least one candidate context for entropy decoding of a part of an encoded bitstream of a frame before the entropy decoding circuit starts entropy decoding of the part of the encoded bitstream of the frame. The context pre-load buffer buffers the at least one candidate context. When a target context actually needed by entropy decoding of the part of the encoded bitstream of the frame is not available in the context pre-load buffer, the context pre-load buffer instructs the pre-fetch circuit to re-fetch the target context, and the entropy decoding circuit stalls entropy decoding of the part of the encoded bitstream of the frame.
    Type: Application
    Filed: November 7, 2019
    Publication date: May 14, 2020
    Inventors: Ming-Long Wu, Chia-Yun Cheng, Yung-Chang Chang
  • Publication number: 20200143836
    Abstract: A video processing system includes a storage device, a receiving circuit, an audio/video demultiplexing circuit, a video decoder, and a display engine. The storage device includes a data buffer, a bitstream buffer, and a display buffer. An output of the receiving circuit is written into the data buffer. An input of the audio/video demultiplexing circuit is read from the data buffer, and an output of the audio/video demultiplexing circuit is written into the bitstream buffer. An input of the video decoder is read from the bitstream buffer, and an output of the video decoder is written into the display buffer. An input of the display engine is read from the display buffer. Each of the data buffer, the bitstream buffer, and the display buffer is a ring buffer.
    Type: Application
    Filed: January 5, 2020
    Publication date: May 7, 2020
    Inventors: Ming-Long Wu, Chia-Yun Cheng, Yung-Chang Chang