Patents by Inventor Hai Sun

Hai Sun 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: 7785666
    Abstract: A method and system for fabricating a magnetic recording device are described. The method and system include providing a mask layer on the magnetic recording device and imprinting a pattern in the mask layer to form a mask. The method and system also include transferring the pattern from the mask to the magnetic recording device. In another aspect, the method and system include providing a malleable mask layer on the magnetic recording device. In this aspect, the method and system also include depressing an imprint mask into the mask layer and curing the mask layer while the imprint mask is depressed into the mask layer to provide a mask having a pattern. The pattern may correspond to a read sensor and/or a perpendicular magnetic recording pole. The method and system also include transferring the pattern from the mask to the magnetic recording device.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: August 31, 2010
    Assignee: Western Digital (Fremont), LLC
    Inventors: Hai Sun, Liubo Hong, Hongping Yuan, Yizhong Wang, Winnie Yu, Xianzhong Zeng
  • Patent number: 7767721
    Abstract: A soft agglomerate of copper oxide ultrafine particles which has an average primary particle diameter of not more than 100 nm and an average secondary particle diameter of not less than 0.2 ?m and of producing the soft agglomerate by (1) forming ultrafine copper oxide by reducing a cuprous carboxyl compound in an aqueous solution, with hydrazine and/or a hydrazine derivative, optionally with a base and optionally with organic compounds, such as alcohol (e.g., ethylene glycol or ethanol), ether, ester or amide; and simultaneously or separately applying an agglomerating force, e.g., agglomerating agent; to produce copper oxide soft agglomerate. Alternatively (2), forming a colloidal dispersion of cuprous oxide ultrafine particles by heating and reducing at least one copper compound (e.g., copper carboxyl, copper alkoxy and copper diketonate compound) at a temperature of not lower than 160 ° C.
    Type: Grant
    Filed: December 2, 2003
    Date of Patent: August 3, 2010
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Mutsuhiro Maruyama, En-Hai Sun
  • Patent number: 7736823
    Abstract: A mask for transferring a pattern for portion of a magnetic recording transducer is disclosed. The masks includes one corner corresponding to an angle of more than ninety degrees and less than one hundred eighty degrees. The mask also includes at least one rectangular serif residing at the corner.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: June 15, 2010
    Assignee: Western Digital (Fremont), LLC
    Inventors: Yizhong Wang, Hai Sun, Hongping Yuan, Winnie Yu
  • Publication number: 20100112486
    Abstract: A method and system for providing a PMR pole in a magnetic recording transducer including an intermediate layer are disclosed. The method and system include providing a mask on the intermediate layer. The mask includes a line having at least one side. A hard mask layer is provided on the mask. At least a portion of the hard mask layer resides on the side(s) of the line. At least part of the hard mask layer on the side(s) of the line is removed. Thus, at least a portion of the line is exposed. The line is then removed, providing an aperture in the hard mask corresponding to the line. The method also includes forming a trench in the intermediate layer under the aperture. The trench top is wider than its bottom. The method further includes providing a PMR pole, at least a portion of which resides in the trench.
    Type: Application
    Filed: October 31, 2008
    Publication date: May 6, 2010
    Applicant: WESTERN DIGITAL (FREMONT), LLC
    Inventors: JINQIU ZHANG, HAI SUN, HONGPING YUAN, TSUNG YUAN CHEN, GUANXIONG LI
  • Publication number: 20080136655
    Abstract: An over-current alerting circuit used in a hand held device includes a current sensor module, a photo sensor module and an alerting module. The current sensor module is used for sensing a loading current of the hand held device and outputting a photo signal according to the intensity of the loading current. The photo sensor module is used for generating a driving signal when the intensity of the photo signal is higher than a predetermined intensity. The alerting module is used for performing an alerting action after the driving signal is received. In addition, an over-current alerting method is also disclosed herein.
    Type: Application
    Filed: October 30, 2007
    Publication date: June 12, 2008
    Inventors: Tai-Shui Ho, Shih-Kuang Tsai, Xin-Hai Sun
  • Publication number: 20060098065
    Abstract: There are provided a soft agglomerate of copper oxide ultrafine particles which has an average primary particle diameter of not more than 100 nm and an average secondary particle diameter of not less than 0.2 ?m and a method for producing the soft agglomerate.
    Type: Application
    Filed: December 2, 2003
    Publication date: May 11, 2006
    Inventors: Mutsuhiro Maruyama, En-Hai Sun
  • Publication number: 20020180914
    Abstract: Disclosed are various reverse-mode direct-view liquid crystal displays (LCD) employing a liquid crystal having a characteristic wavelength in the non-visible spectrum, including transmissive mode displays, and methods of fabrication. In accordance with the principles disclosed, a transmitance mode direct-view LCD includes a first linear polarizer, a second linear polarizer, an internal light source and a cholesteric liquid crystal (CLC) located between the first and second linear polarizers and having a characteristic wavelength to reflect in a non-visible region of light. Portions of the CLC can selectively exhibit a planar state or a focal-conic state, the portions of the CLC in the planar state appearing black, and the portions of the CLC in the focal-conic state appearing white to an observer of the LCD.
    Type: Application
    Filed: December 19, 2001
    Publication date: December 5, 2002
    Applicant: Display Research Incorporated
    Inventors: Bao-Gang Wu, Jianan Hou, Jianmi Gao, Yong-Jing Wang, Shushan Li, hai Sun, Gang Chen
  • Patent number: 6462805
    Abstract: Disclosed are various reverse-mode direct-view liquid crystal displays employing a liquid crystal having a characteristic wavelength in the non-visible spectrum, including reflective, transmissive and reflective-transmissive mode displays. In accordance with the principles disclosed, a direct-view liquid crystal display (LCD) includes a front substantially transparent substrate, a rear substrate, and a controllable cholesteric liquid crystal (CLC) disposed between the front and rear substrates and having a characteristic wavelength to reflect non-visible spectrum; the portions of the controllable CLC can selectively exhibit a planar state or a focal-conic state, the portions of the CLC in the planar state appearing dark, and the portions of the CLC in the focal-conic state appearing bright, to an observer of the LCD.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: October 8, 2002
    Assignee: Display Research, Inc.
    Inventors: Bao-Gang Wu, Jianan Hou, Jianmi Gao, Yong-Jing Wang, Shushan Li, Rui Hai Sun, Gang Chen
  • Patent number: 6329553
    Abstract: A process for a combined selective thermal oxidation and photooxidation of hydrocarbons adsorbed onto zeolite matrices. A highly combined selective thermal oxidation and photooxidation of unsubstituted or alkyl substituted alkanes, alkenes, aromatics and cycloalkyls in solvent free zeolites under dark thermal conditions or under irradiation with visible light. The process oxidizes hydrocarbons almost completely selectively without substantial production of byproducts.
    Type: Grant
    Filed: November 10, 2000
    Date of Patent: December 11, 2001
    Assignee: The Regents of the University of California
    Inventors: Heinz Frei, Fritz Blatter, Hai Sun
  • Patent number: 6150562
    Abstract: A process for selective thermal oxidation of hydrocarbons adsorbed onto zeolite matrices. A highly selective thermal oxidation of unsubstituted or alkyl substituted alkanes, alkenes, aromatics and cycloalkyls is carried out in solvent free zeolites under dark thermal conditions. The process oxidizes hydrocarbons almost completely selectively without substantial production of byproducts.
    Type: Grant
    Filed: June 17, 1999
    Date of Patent: November 21, 2000
    Assignee: The Regents of the University of California
    Inventors: Heinz Frei, Fritz Blatter, Hai Sun
  • Patent number: 5914013
    Abstract: A process for selective thermal oxidation or photooxidation of hydrocarbons adsorbed onto zeolite matrices. A highly selective thermal oxidation and photooxidation of unsubstituted or alkyl substituted alkanes, alkenes, aromatics and cycloalkyls in solvent free zeolites under dark thermal conditions or under irradiation with visible light. The process oxidizes hydrocarbons almost completely selectively without substantial production of byproducts.
    Type: Grant
    Filed: June 13, 1997
    Date of Patent: June 22, 1999
    Assignee: The Regents of the University of California
    Inventors: Heinz Frei, Fritz Blatter, Hai Sun
  • Patent number: 5827406
    Abstract: A selective photooxidation process for the conversion of hydrocarbon molecules to partially oxygenated derivatives, which comprises the steps of adsorbing a hydrocarbon and oxygen onto a dehydrated zeolite support matrix to form a hydrocarbon-oxygen contact pair, and subsequently exposing the hydrocarbon-oxygen contact pair to visible light, thereby forming a partially oxygenated derivative.
    Type: Grant
    Filed: September 11, 1996
    Date of Patent: October 27, 1998
    Assignee: The Regents of the University of California
    Inventors: Heinz Frei, Fritz Blatter, Hai Sun