Patents by Inventor Liu Jun Zhang

Liu Jun Zhang 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: 7760470
    Abstract: A method and apparatus for electrically coupling a slider to a controller circuit are disclosed. In one embodiment, a pre-amplifier with an integrated electrical connector (I-connector) may be connected via an electrical trace to a slider and via a head stack assembly flexible circuit to a control circuit. The pre-amplifier may have two parallel series of spring probe claws, two parallel series of contact pegs, two slots, or a slot and a rotary cam.
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: July 20, 2010
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Li Xing Wu, Yiu Sing Ho, Jeffery L. Wang, Liu Jun Zhang
  • Publication number: 20090141401
    Abstract: A method and apparatus for electrically coupling a slider to a controller circuit are disclosed. In one embodiment, a pre-amplifier with an integrated electrical connector (I-connector) may be connected via an electrical trace to a slider and via a head stack assembly flexible circuit to a control circuit. The pre-amplifier may have two parallel series of spring probe claws, two parallel series of contact pegs, two slots, or a slot and a rotary cam.
    Type: Application
    Filed: February 4, 2009
    Publication date: June 4, 2009
    Applicant: SAE Magnetics (H.K.) LTD.
    Inventors: Li Xing WU, Yiu Sing HO, Jeffery L. WANG, Liu Jun ZHANG
  • Patent number: 7525768
    Abstract: A method and apparatus for electrically coupling a slider to a controller circuit are disclosed. In one embodiment, a pre-amplifier with an integrated electrical connector (I-connector) may be connected via an electrical trace to a slider and via a head stack assembly flexible circuit to a control circuit. The pre-amplifier may have two parallel series of spring probe claws, two parallel series of contact pegs, two slots, or a slot and a rotary cam.
    Type: Grant
    Filed: September 21, 2006
    Date of Patent: April 28, 2009
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Li Xing Wu, Yiu Sing Ho, Jeffery L. Wang, Liu Jun Zhang
  • Publication number: 20090046391
    Abstract: A method and apparatus for electrically coupling a slider to a controller circuit are disclosed. In one embodiment, a pre-amplifier with an integrated electrical connector (I-connector) may be connected via an electrical trace to a slider and via a head stack assembly flexible circuit to a control circuit. The pre-amplifier may have two parallel series of spring probe claws, two parallel series of contact pegs, two slots, or a slot and a rotary cam.
    Type: Application
    Filed: August 12, 2008
    Publication date: February 19, 2009
    Applicant: SAE Magnetics (H.K.) Ltd.
    Inventors: Li Xing Wu, Yiu Sing Ho, Jeffery L. Wang, Liu Jun Zhang
  • Patent number: 7411763
    Abstract: A method and apparatus for electrically coupling a slider to a controller circuit are disclosed. In one embodiment, a pre-amplifier with an integrated electrical connector (I-connector) may be connected via an electrical trace to a slider and via a head stack assembly flexible circuit to a control circuit. The pre-amplifier may have two parallel series of spring probe claws, two parallel series of contact pegs, two slots, or a slot and a rotary cam.
    Type: Grant
    Filed: January 9, 2004
    Date of Patent: August 12, 2008
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Li Xing Wu, Yiu Sing Ho, Jeffery L. Wang, Liu Jun Zhang
  • Patent number: 7401725
    Abstract: A system and method are disclosed for improving hard drive actuator lead attachment. In one embodiment, an actuator board is coupled to an actuator flexible cable by a bonding agent, such as an anisotropic conductive film (ACF). In one embodiment, an actuator flexible cable is coupled to one or more actuator coil leads, such as by solder bump bonding, and the flexible cable/actuator coil coupling is embedded in an actuator frame, such as by polymer injection molding.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: July 22, 2008
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Yiu Sing Ho, Guo Hong Lu, Can Hua Chen, Yuan Neng Luo, Jeffrey L. Wang, Liu Jun Zhang
  • Patent number: 7299536
    Abstract: A system and method for an improved magnetic head arm assembly (HAA), reducing complexity of design and difficulty of manufacture, is disclosed.
    Type: Grant
    Filed: April 6, 2006
    Date of Patent: November 27, 2007
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Jeffery L. Wang, Takehiro Kamigama, Chi Hung Yuen, Liu Jun Zhang
  • Patent number: 7245458
    Abstract: A system and method are disclosed for improving the electrical connection of a hard drive relay flexible circuit assembly to a head-gimbal assembly (HGA) flexure cable. In one embodiment, a flexible circuit assembly is attached to a hard drive coil carriage via a U-shaped connector and is electrically coupled to the HGA flexure cable by a bonding agent, such as an Anisotropic Conductive Film (ACF).
    Type: Grant
    Filed: January 28, 2004
    Date of Patent: July 17, 2007
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Liu Jun Zhang, Guo Hong Lu, Can Hua Chen, Yiu Sing Ho, Jeffery L. Wang
  • Patent number: 7142394
    Abstract: A system and method for an improved magnetic head arm assembly (HAA), reducing complexity of design and difficulty of manufacture, is disclosed.
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: November 28, 2006
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Jeffery L. Wang, Takehiro Kamigama, Chi Hung Yuen, Liu Jun Zhang
  • Publication number: 20060168796
    Abstract: A system and method are disclosed for improving the electrical connection of a hard drive relay flexible circuit assembly to a head-gimbal assembly (HGA) flexure cable. In one embodiment, a flexible circuit assembly is attached to a hard drive coil carriage via a U-shaped connector and is electrically coupled to the HGA flexure cable by a bonding agent, such as an Anisotropic Conductive Film (ACF).
    Type: Application
    Filed: April 4, 2006
    Publication date: August 3, 2006
    Inventors: Liu Jun Zhang, Guo Hong Lu, Can Hua Chen, Yiu Sing Ho, Jeffery Wang
  • Patent number: 7033187
    Abstract: An electrical connection and a method of electrically coupling are disclosed. In one embodiment, a circuit substrate with a first set of circuitry has a bonding pad mounted to a surface of the circuit board. The bonding pad is electrically coupled to the first set of circuitry. A flexible circuit substrate with a second set of circuitry has a connecting pad mounted to a surface of the flexible circuit substrate facing the surface of the circuit board. The connecting pad is electrically coupled to the second set of circuitry. A ball of conductive material is mounted on the bonding pad. A clamping device presses the connecting pad to the ball of conductive material.
    Type: Grant
    Filed: January 26, 2004
    Date of Patent: April 25, 2006
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Li Xing Wu, Liu Jun Zhang
  • Patent number: 7014474
    Abstract: An electrical connection and a method of electrically coupling are disclosed. In one embodiment, a circuit substrate with a first set of circuitry has a bonding pad mounted to a surface of the circuit board. The bonding pad is electrically coupled to the first set of circuitry. A flexible circuit substrate with a second set of circuitry has a connecting pad mounted to a surface of the flexible circuit substrate facing the surface of the circuit board. The connecting pad is electrically coupled to the second set of circuitry. A ball of conductive material is mounted on the bonding pad. A clamping device presses the connecting pad to the ball of conductive material.
    Type: Grant
    Filed: April 8, 2005
    Date of Patent: March 21, 2006
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Li Xing Wu, Liu Jun Zhang
  • Publication number: 20050176271
    Abstract: An electrical connection and a method of electrically coupling are disclosed. In one embodiment, a circuit substrate with a first set of circuitry has a bonding pad mounted to a surface of the circuit board. The bonding pad is electrically coupled to the first set of circuitry. A flexible circuit substrate with a second set of circuitry has a connecting pad mounted to a surface of the flexible circuit substrate facing the surface of the circuit board. The connecting pad is electrically coupled to the second set of circuitry. A ball of conductive material is mounted on the bonding pad. A clamping device presses the connecting pad to the ball of conductive material.
    Type: Application
    Filed: April 8, 2005
    Publication date: August 11, 2005
    Inventors: Li Xing Wu, Liu Jun Zhang
  • Publication number: 20050042894
    Abstract: An electrical connection and a method of electrically coupling are disclosed. In one embodiment, a circuit substrate with a first set of circuitry has a bonding pad mounted to a surface of the circuit board. The bonding pad is electrically coupled to the first set of circuitry. A flexible circuit substrate with a second set of circuitry has a connecting pad mounted to a surface of the flexible circuit substrate facing the surface of the circuit board. The connecting pad is electrically coupled to the second set of circuitry. A ball of conductive material is mounted on the bonding pad. A clamping device presses the connecting pad to the ball of conductive material.
    Type: Application
    Filed: January 26, 2004
    Publication date: February 24, 2005
    Inventors: Li Xing Wu, Liu Jun Zhang
  • Patent number: 6847507
    Abstract: A head actuator mechanism and a method of manufacture for that mechanism are disclosed. The head actuator mechanism includes a head gimbal assembly coupled to the top support face of a bearing assembly and an actuator driving mechanism coupled to the opposite support face. The head gimbal assembly includes an actuator arm and a load beam, the actuator arm being mounted to the top support face. The actuator driving assembly includes a driving coil and a coil holder frame. The driving coil is positioned in a magnetic field created by a magnetic block and yoke.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: January 25, 2005
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Jeffery L. Wang, Chi Hung Yuen, Liu Jun Zhang, Ji Yang, Yiu Sing Ho
  • Publication number: 20040250412
    Abstract: A head actuator mechanism and a method of manufacture for that mechanism are disclosed. The head actuator mechanism includes a head gimbal assembly coupled to the top support face of a bearing assembly and an actuator driving mechanism coupled to the opposite support face. The head gimbal assembly includes an actuator arm and a load beam, the actuator arm being mounted to the top support face. The actuator driving assembly includes a driving coil and a coil holder frame. The driving coil is positioned in a magnetic field created by a magnetic block and yoke.
    Type: Application
    Filed: July 19, 2004
    Publication date: December 16, 2004
    Inventors: Jeffery L. Wang, Chi Hung Yuen, Liu Jun Zhang, Ji Yang, Yiu Sing Ho
  • Publication number: 20040228039
    Abstract: A method and apparatus for electrically coupling a slider to a controller circuit are disclosed. In one embodiment, a pre-amplifier with an integrated electrical connector (I-connector) may be connected via an electrical trace to a slider and via a head stack assembly flexible circuit to a control circuit. The pre-amplifier may have two parallel series of spring probe claws, two parallel series of contact pegs, two slots, or a slot and a rotary cam.
    Type: Application
    Filed: January 9, 2004
    Publication date: November 18, 2004
    Inventors: Li Xing Wu, Yiu Sing Ho, Jeffery L. Wang, Liu Jun Zhang
  • Publication number: 20040200889
    Abstract: A system and method are disclosed for improving hard drive actuator lead attachment. In one embodiment, an actuator board is coupled to an actuator flexible cable by a bonding agent, such as an anisotropic conductive film (ACF). In one embodiment, an actuator flexible cable is coupled to one or more actuator coil leads, such as by solder bump bonding, and the flexible cable/actuator coil coupling is embedded in an actuator frame, such as by polymer injection molding.
    Type: Application
    Filed: December 19, 2003
    Publication date: October 14, 2004
    Inventors: Yiu Sing Ho, Guo Hong Lu, Can Hua Chen, Yuan Neng Luo, Jeffery L. Wang, Liu Jun Zhang
  • Publication number: 20040150917
    Abstract: A system and method for an improved magnetic head arm assembly (HAA), reducing complexity of design and difficulty of manufacture, is disclosed.
    Type: Application
    Filed: August 13, 2003
    Publication date: August 5, 2004
    Inventors: Jeffery L. Wang, Takehiro Kamigama, Chi Hung Yuen, Liu Jun Zhang
  • Publication number: 20040052002
    Abstract: An actuator driving mechanism and a method of manufacture for that mechanism are disclosed. In one embodiment, the actuator driving mechanism includes a statically located stator generating a variable magnetic field to act upon a mobile rotator generating a permanent magnetic field. In a further embodiment, the stator includes a set of driving coils to generate the variable magnetic field and the rotator includes a permanent magnet coupled to a holding frame.
    Type: Application
    Filed: February 10, 2003
    Publication date: March 18, 2004
    Inventors: Jeffery L. Wang, Liu Jun Zhang, Ping Shang, Da Qing Huang, Ji Yang