Patents by Inventor Chao-Hui Yang

Chao-Hui Yang 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: 11127703
    Abstract: Semiconductor devices are provided. The semiconductor device includes a first dielectric layer, a bump, an etching stop layer and a spacer. The first dielectric layer is disposed over and exposes a conductive structure. The bump is partially disposed in the first dielectric layer to electrically connect the conductive structure. The etching stop layer is disposed over the first dielectric layer aside the bump. The spacer surrounds the bump and disposed between the etching stop layer and the bump.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: September 21, 2021
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Chin-Yu Ku, Cheng-Lung Yang, Chen-Shien Chen, Hon-Lin Huang, Chao-Yi Wang, Ching-Hui Chen, Chien-Hung Kuo
  • Patent number: 8218269
    Abstract: Gimbal designs are provided that minimize adverse dynamic performance of a HDD suspension, particularly subsequent to head-disk-interface (HDI) interactions. The improvement of operational performance can be seen in graphical representations of the vibrational modes of a gimbal mounted slider subsequent to such HDI interactions. Each gimbal design includes a ramp limiter formed as two separated arms connected by one or two transverse bars and a routing of conducting traces that relieves stress and minimally contacts these bars.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: July 10, 2012
    Assignee: SAE Magnetics (HK) Ltd.
    Inventors: Qinghua Zeng, Chao-Hui Yang, Yen Fu, Ellis Cha
  • Publication number: 20110299196
    Abstract: Gimbal designs are provided that minimize adverse dynamic performance of a HDD suspension, particularly subsequent to head-disk-interface (HDI) interactions. The improvement of operational performance can be seen in graphical representations of the vibrational modes of a gimbal mounted slider subsequent to such HDI interactions. Each gimbal design includes a ramp limiter formed as two separated arms connected by one or two transverse bars and a routing of conducting traces that relieves stress and minimally contacts these bars.
    Type: Application
    Filed: August 15, 2011
    Publication date: December 8, 2011
    Inventors: Qinghua Zeng, Chao-Hui Yang, Yen Fu, Ellis Cha
  • Patent number: 8027127
    Abstract: In a balanced head gimbal assembly for improved seeking performance, a slider having a magnetic head with a set of read elements to read data and a set of write elements to write data, an air-bearing surface, and a non-air-bearing surface is coupled to a suspension. The suspension includes a loadbeam, a flexure, and a balancing weight. The loadbeam is coupled to an actuator arm. The flexure, coupled to the loadbeam, has a window through which a dimple, coupled to the loadbeam, contacts a dimple contact point. The balancing weight, coupled to the flexure, has a configuration which permits alignment of a center of mass of the head gimbal assembly with the dimple contact point.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: September 27, 2011
    Assignee: SAE Magnetics (HK) Ltd.
    Inventors: Qinghua Zeng, Yen Fu, Li-Yan Zhu, Chao-Hui Yang, Ellis T. Cha
  • Patent number: 8000061
    Abstract: Gimbal designs are provided that minimize adverse dynamic performance of a HDD suspension, particularly subsequent to head-disk-interface (HDI) interactions. The improvement of operational performance can be seen in graphical representations of the vibrational modes of a gimbal mounted slider subsequent to such HDI interactions. Each gimbal design includes a ramp limiter formed as two separated arms connected by one or two transverse bars and a routing of conducting traces that relieves stress and minimally contacts these bars.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: August 16, 2011
    Assignee: SAE Magnetics (HK) Ltd.
    Inventors: Qinghua Zeng, Chao-Hui Yang, Yen Fu, Ellis Cha
  • Publication number: 20110146047
    Abstract: In a balanced head gimbal assembly for improved seeking performance, a slider having a magnetic head with a set of read elements to read data and a set of write elements to write data, an air-bearing surface, and a non-air-bearing surface is coupled to a suspension. The suspension includes a loadbeam, a flexure, and a balancing weight. The loadbeam is coupled to an actuator arm. The flexure, coupled to the loadbeam, has a window through which a dimple, coupled to the loadbeam, contacts a dimple contact point. The balancing weight, coupled to the flexure, has a configuration which permits alignment of a center of mass of the head gimbal assembly with the dimple contact point.
    Type: Application
    Filed: February 28, 2011
    Publication date: June 23, 2011
    Inventors: Qinghua Zeng, Yen Fu, Li-Yan Zhu, Chao-Hui Yang, Ellis T. Cha
  • Patent number: 7957104
    Abstract: A flexure with improved temperature sensitivity is disclosed. An embodiment of the present invention includes a bi-layered flexure that raises or lowers a read/write element a distance that is approximately equal to the distance of protrusion and retraction at varying temperatures.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: June 7, 2011
    Assignee: SAE Magnetics (HK) Ltd.
    Inventors: Yen Fu, Ellis T. Cha, Chao-Hui Yang
  • Patent number: 7907368
    Abstract: In a balanced head gimbal assembly for improved seeking performance, a slider having a magnetic head with a set of read elements to read data and a set of write elements to write data, an air-bearing surface, and a non-air-bearing surface is coupled to a suspension. The suspension includes a loadbeam, a flexure, and a balancing weight. The loadbeam is coupled to an actuator arm. The flexure, coupled to the loadbeam, has a window through which a dimple, coupled to the loadbeam, contacts a dimple contact point. The balancing weight, coupled to the flexure, has a configuration which permits alignment of a center of mass of the head gimbal assembly with the dimple contact point.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: March 15, 2011
    Assignee: SAE Magnetics (HK) Ltd.
    Inventors: Qinghua Zeng, Yen Fu, Li-Yan Zhu, Chao-Hui Yang, Ellis T. Cha
  • Patent number: 7885040
    Abstract: An apparatus with a head gimbal assembly designed to reduce movement and rotation of components of the head gimbal assembly structure is disclosed. One embodiment head gimbal assembly may comprise a flexure including a ramp limiter, a suspension assembly further comprising a suspension tongue, a slider further comprising a magnetic head; and a load beam further comprising a lift tab; and a ramp further comprising a step to engage and support the ramp limiter and support and constrain the movement of the slider. In certain embodiments, the flexure may further comprise a flexure rail located at its end to reduce movement and rotation of the suspension tongue.
    Type: Grant
    Filed: July 6, 2007
    Date of Patent: February 8, 2011
    Assignee: SAE Magnetics (HK) Ltd.
    Inventors: Chao-Hui Yang, Qinghua Zeng, Yen Fu, Ellis T. Cha
  • Publication number: 20100172057
    Abstract: Gimbal designs are provided that minimize adverse dynamic performance of a HDD suspension, particularly subsequent to head-disk-interface (HDI) interactions. The improvement of operational performance can be seen in graphical representations of the vibrational modes of a gimbal mounted slider subsequent to such HDI interactions. Each gimbal design includes a ramp limiter formed as two separated arms connected by one or two transverse bars and a routing of conducting traces that relieves stress and minimally contacts these bars.
    Type: Application
    Filed: March 5, 2010
    Publication date: July 8, 2010
    Inventors: Qinghua Zeng, Chao-Hui Yang, Yen Fu, Ellis Cha
  • Patent number: 7701672
    Abstract: A loadbeam is locally stiffened by either, 1. the addition of strategically placed extra material to the loadbeam, 2. not removing material during the etching process to form the loadbeam, or 3. special forming, by crimping or bending, at specific sites on the beam. The use of local stiffening, when placed about the loadbeam dimple or between the dimple and flexure attachment points, with or without additional damping, can significantly improve the dynamical response of the loadbeam and eliminate vibrational modes of a slider mounted on the loadbeam during HDI interactions with disk surface asperities during disk drive operation.
    Type: Grant
    Filed: June 16, 2006
    Date of Patent: April 20, 2010
    Assignee: SAE Magnetics (HK) Ltd.
    Inventors: Qinghua Zeng, Chao-Hui Yang, Yen Fu, Ellis Cha
  • Patent number: 7684154
    Abstract: Gimbal designs are provided that minimize adverse dynamic performance of a HDD suspension, particularly subsequent to head-disk-interface (HDI) interactions. The improvement of operational performance can be seen in graphical representations of the vibrational modes of a gimbal mounted slider subsequent to such HDI interactions. Each gimbal design includes a ramp limiter formed as two separated arms connected by one or two transverse bars and a routing of conducting traces that relieves stress and minimally contacts these bars.
    Type: Grant
    Filed: August 1, 2006
    Date of Patent: March 23, 2010
    Assignee: SAE Magnetics (HK) Ltd.
    Inventors: Qinghua Zeng, Chao-Hui Yang, Yen Fu, Ellis Cha
  • Patent number: 7679857
    Abstract: In a system and method for a non-contact measurement of the fly height of a slider above a magnetic data storage medium using electrostatic force, a slider with a read/write head flies over a magnetic data storage medium. A series of distinct voltages are applied between the slider and the magnetic data storage medium, and corresponding read-back signals are recorded. Using the recorded read-back signals, coefficients for an empirical curve-fit equation are calculated. The coefficients are normalized and converted into a fly height measurement.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: March 16, 2010
    Assignee: SAE Magnetics (HK) Ltd.
    Inventors: Li-Yan Zhu, Chao-Hui Yang, Yen Fu, Ellis T. Cha
  • Patent number: 7617737
    Abstract: In a system and method for adjusting a static torque on a slider in a head-gimbal assembly, a substantially rigid mass is placed on an air-bearing surface (ABS) of a slider. A static attitude of the slider is measured, and an adjustment location and intensity for a flexure to yield a zero slider static attitude are calculated. The flexure is adjusted based on the measurement and calculations.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: November 17, 2009
    Assignee: SAE Magnetics (HK) Ltd.
    Inventors: Li-Yan Zhu, Chao-Hui Yang, Yen Fu, Ellis T. Cha
  • Publication number: 20090009911
    Abstract: An apparatus with a head gimbal assembly designed to reduce movement and rotation of components of the head gimbal assembly structure is disclosed. One embodiment head gimbal assembly may comprise a flexure including a ramp limiter, a suspension assembly further comprising a suspension tongue, a slider further comprising a magnetic head; and a load beam further comprising a lift tab; and a ramp further comprising a step to engage and support the ramp limiter and support and constrain the movement of the slider. In certain embodiments, the flexure may further comprise a flexure rail located at its end to reduce movement and rotation of the suspension tongue.
    Type: Application
    Filed: July 6, 2007
    Publication date: January 8, 2009
    Applicant: SAE MAGNETICS (H.K.) LTD.
    Inventors: Chao-Hui Yang, Qinghua Zeng, Yen Fu, Ellis T. Cha
  • Publication number: 20080316637
    Abstract: In a system and method for a non-contact measurement of the fly height of a slider above a magnetic data storage medium using electrostatic force, a slider with a read/write head flies over a magnetic data storage medium. A series of distinct voltages are applied between the slider and the magnetic data storage medium, and corresponding read-back signals are recorded. Using the recorded read-back signals, coefficients for an empirical curve-fit equation are calculated. The coefficients are normalized and converted into a fly height measurement.
    Type: Application
    Filed: August 27, 2008
    Publication date: December 25, 2008
    Applicant: SAE Magnetics (H.K.) Ltd.
    Inventors: LI-YAN ZHU, CHAO-HUI YANG, YEN FU, ELLIS T. CHA
  • Patent number: 7440219
    Abstract: In a system and method for a non-contact measurement of the fly height of a slider above a magnetic data storage medium using electrostatic force, a slider with a read/write head flies over a magnetic data storage medium. A series of distinct voltages are applied between the slider and the magnetic data storage medium, and corresponding read-back signals are recorded. Using the recorded read-back signals, coefficients for an empirical curve-fit equation are calculated. The coefficients are normalized and converted into a fly height measurement.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: October 21, 2008
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Li-Yan Zhu, Chao-Hui Yang, Yen Fu, Ellis T. Cha
  • Patent number: 7433156
    Abstract: A flexure mounted slider and its method of fabrication is described, wherein the slider is affixed to a pair of highly compliant, transverse (to the longitudinal axis of a load beam) crossbars whose common axis passes directly above the center of percussion of the slider. The location of the center of percussion of the slider relative to the flexure eliminates translational motion of the slider during HDI events, but not twisting motion in a pitch direction during normal operation, and thereby minimizes the transfer of kinetic energy between the slider and the flexure during HDI events with a hard disk. The high compliance of the flexure crossbars to twists in a pitch direction, as well as the compliance of the outriggers to bending, allows the slider to pass over irregularities in the disk during normal operations.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: October 7, 2008
    Assignee: SAE Magnetics (HK) Ltd.
    Inventors: Li-Yan Zhu, Chao-Hui Yang, Mannuel Hernandez, Yen Fu, Ellis Cha
  • Publication number: 20080239572
    Abstract: A flexure with improved temperature sensitivity is disclosed. An embodiment of the present invention includes a bi-layered flexure that raises or lowers a read/write element a distance that is approximately equal to the distance of protrusion and retraction at varying temperatures.
    Type: Application
    Filed: March 27, 2007
    Publication date: October 2, 2008
    Applicant: SAE MAGNETICS (H.K) LTD.
    Inventors: Yen FU, Ellis T. CHA, Chao-Hui YANG
  • Publication number: 20080239577
    Abstract: In a balanced head gimbal assembly for improved seeking performance, a slider having a magnetic head with a set of read elements to read data and a set of write elements to write data, an air-bearing surface, and a non-air-bearing surface is coupled to a suspension. The suspension includes a loadbeam, a flexure, and a balancing weight. The loadbeam is coupled to an actuator arm. The flexure, coupled to the loadbeam, has a window through which a dimple, coupled to the loadbeam, contacts a dimple contact point. The balancing weight, coupled to the flexure, has a configuration which permits alignment of a center of mass of the head gimbal assembly with the dimple contact point.
    Type: Application
    Filed: March 26, 2007
    Publication date: October 2, 2008
    Applicant: SAE MAGNETICS (H.K.) LTD.
    Inventors: Qinghua ZENG, Yen FU, Li-Yan ZHU, Chao-Hui YANG, Ellis T. CHA