Patents by Inventor Yongjian Sun

Yongjian 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: 8213131
    Abstract: A system in one embodiment includes a magnetic sensor having a free magnetic layer, a nanocrystalline seed layer formed on an insulative amorphous material; a chromium-containing underlayer formed on the seed layer; and a hard bias layer formed on the underlayer and separated from the sensor by the insulative amorphous material. A method according to a further embodiment includes forming an amorphous insulative layer encapsulating a sensor stack; forming a nanocrystalline seed layer on the amorphous insulative material; forming a chromium-containing underlayer on the seed layer; and forming a hard bias layer on the underlayer. Additional systems and methods are presented.
    Type: Grant
    Filed: July 1, 2008
    Date of Patent: July 3, 2012
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Yongjian Sun, Brian R. York
  • Publication number: 20110201191
    Abstract: A method for nondestructive laser lift-off of GaN from sapphire substrates utilizing a solid-state laser is disclosed in the present invention, wherein, a solid-state laser is used as the laser source, and a small laser-spot with a circumference of 3 to 1000 micrometers and a distance of two farthest corners or a longest diameter of no more than 400 micrometers is used for laser scanning point-by-point and line-by-line, wherein the energy in the small laser-spot is distributed such that the energy in the center of the laser-spot is the strongest and is gradually reduced toward the periphery. According to the present invention, a nondestructive laser lift-off with a small laser-spot is achieved, and a scanning mode of the laser lift-off is improved, thereby a lift-off method without the need of aiming is achieved.
    Type: Application
    Filed: April 21, 2009
    Publication date: August 18, 2011
    Inventors: Guoyi Zhang, Yongjian Sun, Xiangning Kang, Zhizhong Chen, Zhijian Yang, Xinrong Yang
  • Patent number: 7929251
    Abstract: An assembly, apparatus and method for fabricating a structural element of a hard disk drive air bearing. The method and apparatus provide an improved protective layer, an improved structural element consisting of a single layer of structural material, and a method consisting of applying the improved protective layer, applying a uniform layer of structural material, applying a resist layer, etching the structural material layer, and removing the resist layer.
    Type: Grant
    Filed: January 10, 2006
    Date of Patent: April 19, 2011
    Assignee: Hitachi Global Storage Technologies, Netherlands B.V.
    Inventors: Peter Dang, Eric W. Flint, Cherngye Hwang, Yongjian Sun
  • Patent number: 7911741
    Abstract: A hard disk drive slider comprises an overcoat layer, which covers an air-bearing surface of the slider. The overcoat covers an exposed surface of a tunneling magnetoresistance transducer. An adhesion layer is coupled with the overcoat layer and the air-bearing surface. The adhesion layer comprises a compound of nitrogen. The compound of nitrogen reduces noise in read data from the tunneling magnetoresistance transducer.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: March 22, 2011
    Assignee: Hitachi Global Storage Technologies, Netherlands, B.V.
    Inventors: Charanjit S. Bhatia, Eric W. Flint, Cherngye Hwang, Eduardo Torres Mireles, Yongjian Sun, Jila Tabib, Nobuto Yasui
  • Publication number: 20110058279
    Abstract: A slider for an information storage system. The slider comprising a single overcoat layer, wherein the layer is deposited onto an ABS of the slider by a filtered cathodic arc process, the layer having a Si/C ratio less than about 10% and a thickness of less than about 15 ?.
    Type: Application
    Filed: July 31, 2009
    Publication date: March 10, 2011
    Inventors: Eric FLINT, Joel Forrest, Yiping Hsiao, Yongjian Sun, Qi-Fan Xiao
  • Patent number: 7855861
    Abstract: A hard disk drive slider comprises an overcoat layer, which covers an air-bearing surface of the slider. The overcoat covers an exposed surface of a tunneling magnetoresistance transducer. An adhesion layer is coupled with the overcoat layer and the air-bearing surface. The adhesion layer comprises a compound of nitrogen. The compound of nitrogen reduces noise in read data from the tunneling magnetoresistance transducer.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: December 21, 2010
    Assignee: Hitachi Global Storage Technologies, Netherlands, B.V.
    Inventors: Peter M. Dang, Eric W. Flint, Daryl J. Pocker, Yongjian Sun, Jila Tabib, Brian R. York
  • Patent number: 7846305
    Abstract: A method for increasing etch depth uniformity in ion milling process in a wafer manufacturing process encompasses loading designated regions of a production pallet with carriers containing wafers to be ion milled. These designated regions have been predetermined to exhibit similar and preferred depths of etching. Non-designated regions of the production pallet are then loaded with dummy carriers and the wafers are ion milled.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: December 7, 2010
    Assignee: Hitachi Global Storage Technologies, Netherlands, B.V.
    Inventors: Pei Cheh Chen, Omar Eduardo Montero Camacho, Laurence Scott Samuelson, Yongjian Sun
  • Publication number: 20100133157
    Abstract: A water treatment apparatus includes a first fluid channel that can circulate contaminated water in the water body, a first inlet that draws the contaminated water into the first fluid channel, and an outlet that allows the contaminated water to exit the first fluid channel. A second fluid channel installed with a filter therein can filter contaminated water in the water body to produce a filtered water flow. A fluid transport apparatus can draw the contaminated water through the first fluid channel and the second fluid channel. A flow control system allows water to flow in a predetermined angular range while blocking at least a portion of the remaining angular range in at least one of the first inlet and the outlet to achieve mixing coverage with different aspect ratio. The position of the outlet can be adjusted to optimize the flow rate and pattern.
    Type: Application
    Filed: February 1, 2010
    Publication date: June 3, 2010
    Inventors: Yongjian Sun, Yan Wang
  • Patent number: 7678266
    Abstract: A water treatment apparatus includes a float configured to float on the surface of a water body, a first fluid channel coupled to the float and configured to circulate contaminated water in the water body, and a second fluid channel coupled to the float and configured to filter contaminated water in the water body. A fluid transport apparatus can draw the contaminated water through the first fluid channel at a first flow rate and through the second fluid channel at a second flow rate.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: March 16, 2010
    Assignee: Jiangsu Tianyi Science and Technology Development Co. Ltd.
    Inventors: Yongjian Sun, Yan Wang
  • Publication number: 20100002336
    Abstract: A system in one embodiment includes a magnetic sensor having a free magnetic layer, a nanocrystalline seed layer formed on an insulative amorphous material; a chromium-containing underlayer formed on the seed layer; and a hard bias layer formed on the underlayer and separated from the sensor by the insulative amorphous material. A method according to a further embodiment includes forming an amorphous insulative layer encapsulating a sensor stack; forming a nanocrystalline seed layer on the amorphous insulative material; forming a chromium-containing underlayer on the seed layer; and forming a hard bias layer on the underlayer. Additional systems and methods are presented.
    Type: Application
    Filed: July 1, 2008
    Publication date: January 7, 2010
    Inventors: Yongjian Sun, Brian R. York
  • Publication number: 20090273859
    Abstract: A method of forming a pole tip topography associated with an air bearing surface (ABS) of a hard disk drive slider is disclosed. The method etches an exposed pole tip region of an ABS at a first angle with respect to the ABS to remove an irregularity from the exposed pole tip region and to flatten the exposed pole tip region. The exposed pole tip region lacks a photo-resist layer. The method also includes etching the flattened exposed pole tip region of the ABS at a second angle with respect to the ABS to form a recession with reference to the ABS.
    Type: Application
    Filed: May 2, 2008
    Publication date: November 5, 2009
    Inventors: Eric W. Flint, Cherngye Hwang, Kenneth M.T. Liu, Eduardo Torres Mireles, Yongjian Sun
  • Publication number: 20090230041
    Abstract: A water treatment apparatus includes a float configured to float on the surface of a water body, a first fluid channel coupled to the float and configured to circulate contaminated water in the water body, and a second fluid channel coupled to the float and configured to filter contaminated water in the water body. A fluid transport apparatus can draw the contaminated water through the first fluid channel at a first flow rate and through the second fluid channel at a second flow rate.
    Type: Application
    Filed: March 13, 2008
    Publication date: September 17, 2009
    Inventors: Yongjian Sun, Yan Wang
  • Patent number: 7560225
    Abstract: A process for ion milling using photoresist as a mask is described. In a preferred embodiment the invention is used in the fabricating air-bearing features on sliders for use in magnetic storage devices. According to the invention the photoresist (liquid or dry) is applied, developed and removed as in the prior art which includes baking steps. The embodiment of the invention includes an additional baking step beyond whatever baking steps are used in the photolithography process. The additional baking step is preferably performed immediately prior to ion milling. The additional baking step according to the invention yields increased uniformity of the depth of the ion milling which is believed to result from reduction of volatile material such as water in the photoresist. When the invention is used as part of the manufacturing process for ion milling the air-bearing features on a slider, the features are more uniform which improves the overall quality and performance.
    Type: Grant
    Filed: May 29, 2003
    Date of Patent: July 14, 2009
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Omar Eduardo Montero Camacho, Pei-C Chen, Cherngye Hwang, Diana Perez, Eric Yongjian Sun
  • Patent number: 7481312
    Abstract: Embodiments of the present invention are directed to a frame component of a pallet assembly. In one embodiment, the frame comprises a plurality of arms for retaining at least one carrier component. The frame further comprises at least one spring disposed upon one of the plurality of arms. The spring for applying pressure upon the carrier.
    Type: Grant
    Filed: December 2, 2004
    Date of Patent: January 27, 2009
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Pei Chen, Jorge Goitia, Cherngye Hwang, Bigal Leung, Diana Perez, Yongjian Sun
  • Publication number: 20080273271
    Abstract: A method for reducing the height of a defect associated with an air bearing surface of a hard disk drive slider is disclosed. The technology initially ion mills for a first period of time at a first angle relative to an air bearing surface of a disk drive slider to remove a first portion of the air bearing surface. Then the technology ion mills for a second period of time at a second angle relative to an air bearing surface of the disk drive slider to remove a second portion of the air bearing surface. The second portion of the air bearing surface comprises a defect wherein the ion milling at the second angle reduces the height of the defect with respect to the air bearing surface.
    Type: Application
    Filed: May 3, 2007
    Publication date: November 6, 2008
    Inventors: Roberto Cabral Frias, Mario Garcia De La Cruz, Cherngye Hwang, Tetsuya Matsusaki, Omar E. Montero Camacho, Yongjian Sun
  • Publication number: 20080266715
    Abstract: A hard disk drive slider comprises an overcoat layer, which covers an air-bearing surface of the slider. The overcoat covers an exposed surface of a tunneling magnetoresistance transducer. An adhesion layer is coupled with the overcoat layer and the air-bearing surface. The adhesion layer comprises a compound of nitrogen. The compound of nitrogen reduces noise in read data from the tunneling magnetoresistance transducer.
    Type: Application
    Filed: April 30, 2007
    Publication date: October 30, 2008
    Inventors: Charanjit S. Bhatia, Eric W. Flint, Cherngye Hwang, Eduardo Torres Mireles, Yongjian Sun, Jila Tabib, Nobuto Yasui
  • Publication number: 20080266719
    Abstract: A hard disk drive slider comprises a tunneling magnetoresistance transducer, which comprises an insulator barrier. A nitrogen atom from a nitrogen atmosphere occupies an oxygen atom vacancy within the insulator barrier, such that noise in read data from the tunneling magnetoresistance transducer is reduced.
    Type: Application
    Filed: April 30, 2007
    Publication date: October 30, 2008
    Inventors: Peter M. Dang, Eric W. Flint, Daryl J. Pocker, Yongjian Sun, Jila Tabib, Brian R. York
  • Publication number: 20080037167
    Abstract: Embodiments of the present invention pertain to forming a head with reduced pole tip recession. According to one embodiment, a pole tip element is formed from a platinum containing material. During diamond like carbon (DLC) processing, hydrogen and hydrogen containing compounds are removed from a vacuum plasma processing environment that contains the head so that an amount of material that is removed from the pole tip element and other non-platinum containing elements associated with the head are approximately the same.
    Type: Application
    Filed: August 9, 2006
    Publication date: February 14, 2008
    Inventors: Eric W. Flint, Chemgye Hwang, Ning Shi, Yongjian Sun
  • Patent number: 7300556
    Abstract: A method of physical vapor deposition (PVD) is disclosed in which xenon is used as the operating gas in the vacuum chamber in the deposition of an adhesion layer, preferably silicon, which allows the adhesion layer to be ultra-thin with improved durability over prior art films. The use of argon as is typical in the prior art results in argon atoms being incorporated into the ultra-thin silicon film with deleterious results. In films that are only several angstroms thick, the contamination of the film with argon or other elements can yield a film with reduced adhesion performance and in some cases noble atoms such as argon can escape the film leaving voids or pinholes. The use of the larger and heavier xenon atoms in the vacuum chamber produces a substantially purer film with reduced risk of voids and pinholes.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: November 27, 2007
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Cherngye Hwang, Eun Row, Ning Shi, Eric (Yongjian) Sun
  • Patent number: 7296420
    Abstract: Embodiments of the present invention are directed to a pallet assembly which facilitates direct cooling of the wafer carrier. In one embodiment, the pallet assembly comprises a frame which holds at least one carrier of a component. The pallet assembly further comprises a tray which is operable for being mechanically coupled with the frame. The tray comprises at least one discreet region which corresponds with the carrier when the tray is coupled with the frame. In embodiments of the present invention, the discreet region comprises at least one hole extending through the tray for permitting a coolant medium to dissipate heat from the carrier.
    Type: Grant
    Filed: December 2, 2004
    Date of Patent: November 20, 2007
    Assignee: Hitachi Global Storage Technologies Amsterdam, B.V.
    Inventors: Pei Chen, Jorge Goitia, Cherngye Hwang, Bigal Leung, Diana Perez, Yongjian Sun