Patents by Inventor Ming Mao

Ming Mao 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: 20220115035
    Abstract: The present disclosure generally relates to a read head assembly having a dual free layer (DFL) structure disposed between a first shield and a second shield at a media facing surface. The read head assembly further comprises a rear hard bias (RHB) structure disposed adjacent to the DFL structure recessed from the media facing surface, where an insulation layer separates the RHB structure from the DFL structure. The insulation layer is disposed perpendicularly between the first shield and the second shield. The DFL structure comprises a first free layer and a second free layer having equal stripe heights from the media facing surface to the insulation layer. The RHB structure comprises a seed layer, a bulk layer, and a capping layer. The capping layer and the insulation layer prevent the bulk layer from contacting the second shield.
    Type: Application
    Filed: February 24, 2021
    Publication date: April 14, 2022
    Inventors: Ming MAO, Chen-Jung CHIEN, Daniele MAURI, Goncalo Marcos BAIÃO DE ALBUQUERQUE
  • Patent number: 11259069
    Abstract: A system for providing video playback comprises a processor configured to synchronize clocks on the plurality of devices to a standard time, provide target video playback positions to the plurality of devices, wherein target video playback positions are based at least in part on the timing information, provide one or more locators for video streams to the plurality of devices, monitor playback status for each of the plurality of devices, and for a device, determine whether the playback status for the device indicates that a selected bitrate is too low or too high or that the playback is fast or slow; in response to determining the selected bitrate is too low, indicate to select a higher bitrate for a device; and in response to determining the selected bitrate is too high, indicate to select a lower bitrate for the device.
    Type: Grant
    Filed: February 5, 2020
    Date of Patent: February 22, 2022
    Assignee: VisualOn, Inc.
    Inventors: Cheng-Ta Hsieh, Hyoheon Hong, Huan-Chih Tsai, Ming-Mao Chiang, Yubao Li
  • Publication number: 20220005862
    Abstract: A method for forming a pixelated optoelectronic stack comprises forming a stacked layer structure that comprises a bottom electrode layer, an optoelectronic layer over the bottom electrode layer, and a patterned hard-mask comprising a pattern over the optoelectronic layer. The method comprises replicating the pattern into the optoelectronic layer and the bottom electrode layer, thereby forming a first intermediate pixelated stack comprising at least two islands of stack separated from one another by stack-free areas; providing an electrically insulating layer on the first intermediate pixelated stack; removing a top portion of the electrically insulating layer and removing any remaining hard-mask so that a top surface of the electrically insulating layer is coplanar with an exposed top surface of the first intermediate pixelated stack, yielding a second intermediate pixelated stack; and forming a top transparent electrode layer over the second intermediate pixelated stack.
    Type: Application
    Filed: July 2, 2021
    Publication date: January 6, 2022
    Inventors: Yunlong Li, Stefano Guerrieri, Ming Mao, Luis Moreno Hagelsieb
  • Publication number: 20220005500
    Abstract: The present disclosure generally relates to a Wheatstone bridge array that has four resistors. Each resistor includes a plurality of TMR films. Each resistor has identical TMR films. The TMR films of two resistors have reference layers that have an antiparallel magnetic orientation relative to the TMR films of the other two resistors. To ensure the antiparallel magnetic orientation, the TMR films are all formed simultaneously and annealed in a magnetic field simultaneously. Thereafter, the TMR films of two resistors are annealed a second time in a magnetic field while the TMR films of the other two resistors are not annealed a second time.
    Type: Application
    Filed: September 20, 2021
    Publication date: January 6, 2022
    Applicant: Western Digital Technologies, Inc.
    Inventors: Yuankai ZHENG, Ming MAO, Daniele MAURI, Chih-Ching HU, Chen-Jung CHIEN
  • Patent number: 11217765
    Abstract: The present disclosure relates to the field of display technologies, and relates to a display substrate, a fabricating method of a display substrate, and a display device. The display substrate includes a base. The display substrate is divided into a display area and a non-display area located at a periphery of the display area. The display area has a plurality of pixel regions. Each of pixel regions is provided with a pixel structure. The pixel structure includes a plurality of organic film layers and inorganic film layers disposed in a stacked manner. An area of the non-display area near an edge thereof is an anti-cracking reinforcing area, which is only provided with the organic film layer. The organic film layer at least covers an outer edge surface of the inorganic film layer adjacent to the anti-cracking reinforcing area in the non-display area.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: January 4, 2022
    Assignees: Chengdu BOE Optoelectronics Technology Co., Ltd., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Li Song, Zhiliang Jiang, Ming Mao
  • Publication number: 20210390978
    Abstract: The present disclosure generally related to a two dimensional magnetic recording (TDMR) read head having a magnetic tunnel junction (MTJ). Both the upper reader and the lower reader have a dual free layer (DFL) MTJ structure between two shields. A synthetic antiferromagnetic (SAF) soft bias structure bounds the MTJ, and a rear hard bias (RHB) structure is disposed behind the MTJ. The DFL MTJ decreases the distance between the upper and lower reader and hence, improves the area density capacity (ADC). Additionally, the SAF soft bias structures and the rear head bias structure cause the dual free layer MTJ to have a scissor state magnetic moment at the media facing surface (MFS).
    Type: Application
    Filed: June 11, 2020
    Publication date: December 16, 2021
    Inventors: Chih-Ching HU, Yung-Hung WANG, Ming MAO, Guanxiong LI, Daniele MAURI, Xiaoyong LIU, Yukimasa OKADA, Anup ROY, Chen-jung CHIEN, Hongxue LIU
  • Patent number: 11201280
    Abstract: A Wheatstone bridge array comprising a tunneling magnetoresistive (TMR) sensor and a method for manufacturing is disclosed. The bottom lead for the TMR sensor has a very small surface roughness due to not only chemical mechanical planarization (CMP) but also due to forming the bottom lead from multiple layers. The multiple layers include at least a bottom first metal layer and a top second metal layer disposed on the first metal layer. The second metal layer generally has a lower surface roughness than the first metal layer. Additionally, the second metal layer has a slower polishing rate. Therefore, not only does the second metal layer reduce the surface roughness simply be being present, but the slower polishing rate enables the top second metal film to be polished to a very fine surface roughness of less than or equal to ˜2 Angstroms.
    Type: Grant
    Filed: December 30, 2019
    Date of Patent: December 14, 2021
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Ronghui Zhou, Ming Mao, Ming Jiang, Yuankai Zheng, Chen-jung Chien, Yung-Hung Wang, Chih-Ching Hu
  • Patent number: 11172238
    Abstract: A system for providing video playback includes an interface and a processor. The interface is configured to receive a desired video playback request and receive a video content source switching request from a first video content source to a second video content source. The processor is configured to generate a not-all-I-frame first stream for the first video content source, generate an all-I-frame second stream and a not-all-I-frame second stream for the second video content source, switch from the not-all-I-frame first stream for the first video content source to the all-I-frame second stream for the second video content source, and switch from the all-I-frame second stream for the second video content source to the not-all-I-frame second stream for the second video content source on a next I-frame occurrence in the not-all-I-frame second stream for the second video content source.
    Type: Grant
    Filed: February 5, 2020
    Date of Patent: November 9, 2021
    Assignee: VisualOn, Inc.
    Inventors: Cheng-Ta Hsieh, Hyoheon Hong, Ming-Mao Chiang
  • Patent number: 11169227
    Abstract: The present disclosure generally relates to a Wheatstone bridge that includes a plurality of resistors comprising dual free layer (DFL) TMR structures. The DFL TMR structures include one or more hard bias structures on the side of DLF. Additionally, one or more soft bias structures may also be present on a side of the DFL. Two resistors will have identical hard bias material while two other resistors will have hard bias material that is identical to each other, yet different when compared to the first two resistors. The hard bias materials will provide opposite magnetizations that will provide opposite bias fields that result in two different magnetoresistance responses for the DFL TMR.
    Type: Grant
    Filed: December 30, 2019
    Date of Patent: November 9, 2021
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Chih-Ching Hu, Yung-Hung Wang, Yuankai Zheng, Chen-jung Chien, Ming Mao, Daniele Mauri, Ming Jiang
  • Patent number: 11170806
    Abstract: The present disclosure generally relates to a Wheatstone bridge array that has four resistors. Each resistor includes a plurality of TMR films. Each resistor has identical TMR films. The TMR films of two resistors have reference layers that have an antiparallel magnetic orientation relative to the TMR films of the other two resistors. To ensure the antiparallel magnetic orientation, the TMR films are all formed simultaneously and annealed in a magnetic field simultaneously. Thereafter, the TMR films of two resistors are annealed a second time in a magnetic field while the TMR films of the other two resistors are not annealed a second time.
    Type: Grant
    Filed: May 20, 2020
    Date of Patent: November 9, 2021
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Yuankai Zheng, Ming Mao, Daniele Mauri, Chih-Ching Hu, Chen-Jung Chien
  • Patent number: 11169228
    Abstract: The present disclosure generally relates to a Wheatstone bridge that has four resistors. Each resistor includes a plurality of tunneling magnetoresistance (TMR) structures. Two resistors have identical TMR structures. The remaining two resistors also have identical TMR structures, though the TMR structures are different from the other two resistors. Additionally, the two resistors that have identical TMR structures each have an additional non-TMR resistor as compared to the remaining two resistors that have identical TMR structures. Therefore, the working bias field for the Wheatstone bridge is non-zero.
    Type: Grant
    Filed: December 30, 2019
    Date of Patent: November 9, 2021
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Yung-Hung Wang, Daniele Mauri, Ming Mao, Chen-jung Chien, Yuankai Zheng, Chih-Ching Hu, Carlos Corona, Matthew Stevenson, Ming Jiang
  • Patent number: 11170809
    Abstract: The present disclosure generally related to read heads having dual free layer (DFL) sensors. The DFL sensor and has a surface at the media facing surface (MFS). Behind the DFL sensor away from the MFS, is a rear hard bias (RHB) structure. The RHB structure is disposed between the shields as well. In between the DFL sensor and the RHB structure is insulating material. The insulating material is a multilayer structure. A first layer of the multilayer structure is composed of the same material as the tunnel magnetoresistive barrier layer, such as MgO, and is disposed adjacent the DFL sensor, yet spaced from the RHB structure. A second layer of the multilayer structure is a different insulating layer that is disposed adjacent the RHB structure, yet spaced from the DFL sensor. The multilayer structure helps improve areal density without degrading head stability and performance reliability by maintaining RHB coercivity.
    Type: Grant
    Filed: June 19, 2020
    Date of Patent: November 9, 2021
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Ming Mao, Chen-Jung Chien
  • Publication number: 20210336208
    Abstract: A display panel and manufacturing methods thereof are provided. In one example, the display panel includes a flexible substrate having a display area and a non-display area, a dam structure located in the non-display area and disposed around the display area, one or more grooves disposed on the non-display area between the display area and the dam structure, and an organic encapsulation layer. In some examples, the organic encapsulation layer covers each of the display area, at least a portion of the non-display area, and the one or more grooves. Accordingly, a display device comprising the display panel is also provided. Thus, a flatness of the organic encapsulation layer may be improved and peeling may be reduced between the organic encapsulation layer and a substrate on which the organic encapsulation layer is disposed, thereby improving an overall quality of the finished display panel.
    Type: Application
    Filed: April 3, 2019
    Publication date: October 28, 2021
    Inventors: Ying LIU, Ming MAO, Yuhang PENG
  • Patent number: 11087785
    Abstract: The present disclosure generally related to read heads having dual free layer (DFL) sensors. The read head has a sensor disposed between two shields. The sensor is a DFL sensor and has a surface at the media facing surface (MFS). Behind the DFL sensor, and away from the MFS, is a rear hard bias (RHB) structure. The RHB structure is disposed between the shields as well. In between the DFL sensor and the RHB structure is insulating material. The RHB is disposed on the insulating material. The RHB includes a RHB seed layer as well as a RHB bulk layer. The RHB seed layer has a thickness of between 26 Angstroms and 35 Angstroms. The RHB seed layer ensures the read head has a strong RHB magnetic field that can be uniformly applied.
    Type: Grant
    Filed: June 29, 2020
    Date of Patent: August 10, 2021
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Ming Mao, Daniele Mauri, Chen-Jung Chien, Guanxiong Li
  • Publication number: 20210201943
    Abstract: The present disclosure generally relates to a Wheatstone bridge array that has four resistors. Each resistor includes a plurality of TMR films. Each resistor has identical TMR films. The TMR films of two resistors have reference layers that have an antiparallel magnetic orientation relative to the TMR films of the other two resistors. To ensure the antiparallel magnetic orientation, the TMR films are all formed simultaneously and annealed in a magnetic field simultaneously. Thereafter, the TMR films of two resistors are annealed a second time in a magnetic field while the TMR films of the other two resistors are not annealed a second time.
    Type: Application
    Filed: May 20, 2020
    Publication date: July 1, 2021
    Inventors: Yuankai ZHENG, Ming MAO, Daniele MAURI, Chih-Ching HU, Chen-Jung CHIEN
  • Publication number: 20210074796
    Abstract: A display substrate and a display device are provided in the present invention. The display substrate includes a base substrate, and a positive power supply line, a negative power supply line and a first dam which are on the base substrate. The base substrate includes a display region and a peripheral region arranged around the display region. The positive power supply line, the negative power supply line and the first dam are in the peripheral region, and the first dam is arranged around the display region. At least in a corresponding region between the positive power supply line and the negative power supply line, a protruding structure is on a side of the first dam proximal to the display region.
    Type: Application
    Filed: December 25, 2019
    Publication date: March 11, 2021
    Inventors: Ming MAO, Pan ZHAO, Li SONG, Ge WANG, Zhiliang JIANG
  • Publication number: 20210063503
    Abstract: A tunneling magnetoresistance (TMR) sensor device is disclosed that includes one or more TMR resistors. The TMR sensor device comprises a first TMR resistor comprising a first TMR film, a second TMR resistor comprising a second TMR film different than the first TMR film, a third TMR resistor comprising the second TMR film, and a fourth TMR resistor comprising the first TMR film. The first and fourth TMR resistors are disposed in a first plane while the second and third TMR resistors are disposed in a second plane different than the first plane. The first TMR film comprises a synthetic anti-ferromagnetic pinned layer having a magnetization direction of a reference layer orthogonal to a magnetization direction a free layer. The second TMR film comprises a double synthetic anti-ferromagnetic pinned layer having a magnetization direction of a reference layer orthogonal to a magnetization direction of a free layer.
    Type: Application
    Filed: December 18, 2019
    Publication date: March 4, 2021
    Inventors: Chih-Ching HU, Yung-Hung WANG, Ming MAO, Daniele MAURI, Ming JIANG
  • Publication number: 20210063502
    Abstract: A tunneling magnetoresistance (TMR) sensor device is disclosed that includes four or more TMR resistors. The TMR sensor device comprises a first TMR resistor comprising a first TMR film, a second TMR resistor comprising a second TMR film different than the first TMR film, a third TMR resistor comprising the second TMR film, and a fourth TMR resistor comprising the first TMR film. The first, second, third, and fourth TMR resistors are disposed in the same plane. The first TMR film comprises a synthetic anti-ferromagnetic pinned layer having a magnetization direction of the reference layer orthogonal to a free layer. The second TMR film comprises a double synthetic anti-ferromagnetic pinned layer having a magnetization direction of the reference layer orthogonal to the magnetization of a free layer, but opposite to the magnetization direction of the reference layer of the first TMR film.
    Type: Application
    Filed: December 18, 2019
    Publication date: March 4, 2021
    Inventors: Chih-Ching HU, Yung-Hung WANG, Ann Lorraine CARVAJAL, Ming MAO, Chen-Jung CHIEN, Yuankai ZHENG, Ronghui ZHOU, Dujiang WAN, Carlos CORONA, Daniele MAURI, Ming JIANG
  • Publication number: 20210063507
    Abstract: The present disclosure generally relates to a Wheatstone bridge array that has four resistors. Each resistor includes a plurality of TMR structures. Two resistors have identical TMR structures. The remaining two resistors also have identical TMR structures, though the TMR structures are different from the other two resistors. Additionally, the two resistors that have identical TMR structures have a different resistance area as compared to the remaining two resistors that have identical TMR structures. Therefore, the working bias field for the Wheatstone bridge array is non-zero.
    Type: Application
    Filed: December 30, 2019
    Publication date: March 4, 2021
    Inventors: Yuankai ZHENG, Christian KAISER, Zhitao DIAO, Chih-Ching HU, Chen-jung CHIEN, Yung-Hung WANG, Dujiang WAN, Ronghui ZHOU, Ming MAO, Ming JIANG, Daniele MAURI
  • Publication number: 20210063508
    Abstract: The present disclosure generally relates to a Wheatstone bridge that includes a plurality of resistors comprising dual free layer (DFL) TMR structures. The DFL TMR structures include one or more hard bias structures on the side of DLF. Additionally, one or more soft bias structures may also be present on a side of the DFL. Two resistors will have identical hard bias material while two other resistors will have hard bias material that is identical to each other, yet different when compared to the first two resistors. The hard bias materials will provide opposite magnetizations that will provide opposite bias fields that result in two different magnetoresistance responses for the DFL TMR.
    Type: Application
    Filed: December 30, 2019
    Publication date: March 4, 2021
    Inventors: Chih-Ching HU, Yung-Hung WANG, Yuankai ZHENG, Chen-jung CHIEN, Ming MAO, Daniele MAURI, Ming JIANG