Patents by Inventor Tianhong Zhang

Tianhong 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).

  • Publication number: 20100230819
    Abstract: Some embodiments include semiconductor processing methods in which a copper barrier is formed to be laterally offset from a copper component, and in which nickel is formed to extend across both the barrier and the component. The barrier may extend around an entire lateral periphery of the component, and may be spaced from the component by an intervening ring of electrically insulative material. The copper component may be a bond pad or an interconnect between two levels of metal layers. Some embodiments include semiconductor constructions in which nickel extends across a copper component, a copper barrier is laterally offset from the copper component, and an insulative material is between the copper barrier and the copper component.
    Type: Application
    Filed: May 21, 2010
    Publication date: September 16, 2010
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Tianhong Zhang, Akram Ditali
  • Patent number: 7749885
    Abstract: Some embodiments include semiconductor processing methods in which a copper barrier is formed to be laterally offset from a copper component, and in which nickel is formed to extend across both the barrier and the component. The barrier may extend around an entire lateral periphery of the component, and may be spaced from the component by an intervening ring of electrically insulative material. The copper component may be a bond pad or an interconnect between two levels of metal layers. Some embodiments include semiconductor constructions in which nickel extends across a copper component, a copper barrier is laterally offset from the copper component, and an insulative material is between the copper barrier and the copper component.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: July 6, 2010
    Assignee: Micron Technology, Inc.
    Inventors: Tianhong Zhang, Akram Ditali
  • Patent number: 7504767
    Abstract: An electrode structure for a display device comprising a gate electrode proximate to an emitter and a focusing electrode separated from the gate electrode by an insulating layer containing a ridge are provided. When the focusing electrode is an aperture-type electrode, the ridge protrudes closer to the emitter than the sidewall of the gate electrode or the sidewall of the focusing electrode. When the focusing electrode is a concentric-type electrode, the ridge protrudes above the upper surface of the gate electrode or the upper surface of the focusing electrode. A method for making the aperture-type and concentric-type electrode structures is described. A display device containing such electrode structures is also described. By forming an insulating ridge between the gate and focusing electrodes, shorting between the two electrodes is reduced and yield enhancement increased.
    Type: Grant
    Filed: March 28, 2005
    Date of Patent: March 17, 2009
    Assignee: Micron Technology, Inc.
    Inventors: Benham Moradi, Zhong-Yi Xia, Tianhong Zhang
  • Publication number: 20080247988
    Abstract: Comblike, surfactant polymers for changing the surface properties of biomaterials are provided. Such surfactant polymers comprise a polymeric backbone of repeating monomeric units having functional groups for coupling with side chains, a plurality of hydrophobic side chains linked to said backbone via the functional groups, and a plurality of hydrophilic side chains linked to said backbone via the functional groups. The hydrophobic side chains comprise an alkyl group comprising from 2 to 18 methylene groups. The alkyl groups are linked to the polymeric backbone through ester linkages, secondary amine linkages, or, preferably, amide linkages.
    Type: Application
    Filed: May 21, 2007
    Publication date: October 9, 2008
    Inventors: Roger E. MARCHANT, Tianhong ZHANG, Yongxing QIU, Mark A. RUEGSEGGER
  • Publication number: 20080142982
    Abstract: Some embodiments include semiconductor processing methods in which a copper barrier is formed to be laterally offset from a copper component, and in which nickel is formed to extend across both the barrier and the component. The barrier may extend around an entire lateral periphery of the component, and may be spaced from the component by an intervening ring of electrically insulative material. The copper component may be a bond pad or an interconnect between two levels of metal layers. Some embodiments include semiconductor constructions in which nickel extends across a copper component, a copper barrier is laterally offset from the copper component, and an insulative material is between the copper barrier and the copper component.
    Type: Application
    Filed: December 15, 2006
    Publication date: June 19, 2008
    Inventors: Tianhong Zhang, Akram Ditali
  • Patent number: 7276474
    Abstract: Comblike, surfactant polymers for changing the surface properties of biomaterials are provided. Such surfactant polymers comprise a polymeric backbone of repeating monomeric units having functional groups for coupling with side chains, a plurality of hydrophobic side chains linked to said backbone via the functional groups, and a plurality of hydrophilic side chains linked to said backbone via the functional groups. The hydrophobic side chains comprise an alkyl group comprising from 2 to 18 methylene groups. The alkyl groups are linked to the polymeric backbone through ester linkages, secondary amine linkages, or, preferably, amide linkages.
    Type: Grant
    Filed: April 13, 2004
    Date of Patent: October 2, 2007
    Assignee: Nanomimetics, Inc.
    Inventors: Roger E. Marchant, Tianhong Zhang, Yongxing Qiu, Mark A. Ruegsegger
  • Patent number: 7128842
    Abstract: A layer of polyimide or polysilicon is used as a mask in vapor hydrogen fluoride etching. Both non-photosensitive and photosensitive type polyimide may be used. A non-photosensitive polyimide mask requires the use of photoresist for patterning with a lithographic mask. Alternatively, photosensitive type polyimide may be patterned directly with the use of a lithographic mask. The resulting polyimide mask enables the etching of very small features with great uniformity. Such etching may be used to expose micropoint emitters of field emission devices.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: October 31, 2006
    Inventors: Tianhong Zhang, John K. Lee
  • Patent number: 7078249
    Abstract: A method of forming a sharp silicon structure, such as a silicon field emitter, includes oxidizing the silicon structure to form an oxide layer thereon, then removing the oxide layer. Oxidizing may occur at a low temperature and form a relatively thin (e.g., about 20 ? to about 40 ?) oxide layer on the silicon field emitter. The oxide layer may be removed by etching. A silicon field emitter that has been fabricated in accordance with the method is substantially free of crystalline defects and may include an emitter tip having a diameter as small as about 40 ? to about 20 ? or less.
    Type: Grant
    Filed: March 7, 2005
    Date of Patent: July 18, 2006
    Assignee: Micron Technology, Inc.
    Inventor: Tianhong Zhang
  • Publication number: 20060084192
    Abstract: A method of forming a sharp silicon structure, such as a silicon field emitter, includes oxidizing the silicon structure to form an oxide layer thereon, then removing the oxide layer. Oxidizing may occur at a low temperature and form a relatively thin (e.g., about 20 ? to about 40 ?) oxide layer on the silicon field emitter. The oxide layer may be removed by etching. A silicon field emitter that has been fabricated in accordance with the method is substantially free of crystalline defects and may include an emitter tip having a diameter as small as about 40 ? to about 20 ? or less.
    Type: Application
    Filed: March 7, 2005
    Publication date: April 20, 2006
    Inventor: Tianhong Zhang
  • Patent number: 6953701
    Abstract: A method of sharpening a tapered or pointed silicon structure, such as a silicon field emitter. The method includes oxidizing the silicon field emitter to form an oxide layer thereon and removing the oxide layer. Oxidizing occurs at a low temperature and forms a relatively thin (e.g., about 20 ? to about 40 ?) oxide layer on the silicon field emitter. The oxide layer may be removed by etching. The method may be employed to sharpen existing silicon structures or in fabricating tapered or pointed silicon structures. A silicon field emitter that has been sharpened or fabricated in accordance with the method is substantially free of crystalline defects and includes an emitter tip having a diameter as small as about 40 ? to about 20 ? or less.
    Type: Grant
    Filed: August 5, 2002
    Date of Patent: October 11, 2005
    Assignee: Micron Technology, Inc.
    Inventor: Tianhong Zhang
  • Publication number: 20050168130
    Abstract: An electrode structure for a display device comprising a gate electrode proximate to an emitter and a focusing electrode separated from the gate electrode by an insulating layer containing a ridge are provided. When the focusing electrode is an aperture-type electrode, the ridge protrudes closer to the emitter than the sidewall of the gate electrode or the sidewall of the focusing electrode. When the focusing electrode is a concentric-type electrode, the ridge protrudes above the upper surface of the gate electrode or the upper surface of the focusing electrode. A method for making the aperture-type and concentric-type electrode structures is described. A display device containing such electrode structures is also described. By forming an insulating ridge between the gate and focusing electrodes, shorting between the two electrodes is reduced and yield enhancement increased.
    Type: Application
    Filed: March 28, 2005
    Publication date: August 4, 2005
    Inventors: Benham Moradi, Zhong-Yi Xia, Tianhong Zhang
  • Patent number: 6900586
    Abstract: An electrode structure for a display device comprising a gate electrode proximate to an emitter and a focusing electrode separated from the gate electrode by an insulating layer containing a ridge are provided. When the focusing electrode is an aperture-type electrode, the ridge protrudes closer to the emitter than the sidewall of the gate electrode or the sidewall of the focusing electrode. When the focusing electrode is a concentric-type electrode, the ridge protrudes above the upper surface of the gate electrode or the upper surface of the focusing electrode. A method for making the aperture-type and concentric-type electrode structures is described. A display device containing such electrode structures is also described. By forming an insulating ridge between the gate and focusing electrodes, shorting between the two electrodes is reduced and yield enhancement increased.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: May 31, 2005
    Assignee: Micron Technology, Inc.
    Inventors: Benham Moradi, Zhong-Yi Xia, Tianhong Zhang
  • Publication number: 20050008603
    Abstract: Comblike, surfactant polymers for changing the surface properties of biomaterials are provided. Such surfactant polymers comprise a polymeric backbone of repeating monomeric units having functional groups for coupling with side chains, a plurality of hydrophobic side chains linked to said backbone via the functional groups, and a plurality of hydrophilic side chains linked to said backbone via the functional groups. The hydrophobic side chains comprise an alkyl group comprising from 2 to 18 methylene groups. The alkyl groups are linked to the polymeric backbone through ester linkages, secondary amine linkages, or, preferably, amide linkages.
    Type: Application
    Filed: April 13, 2004
    Publication date: January 13, 2005
    Inventors: Roger Marchant, Tianhong Zhang, Yongxing Qiu, Mark Ruegsegger
  • Patent number: 6759388
    Abstract: Comblike, surfactant polymers for changing the surface properties of biomaterials are provided. Such surfactant polymers comprise a polymeric backbone of repeating monomeric units having functional groups for coupling with side chains, a plurality of hydrophobic side chains linked to said backbone via the functional groups, and a plurality of hydrophilic side chains linked to said backbone via the functional groups. The hydrophobic side chains comprise an alkyl group comprising from 2 to 18 methylene groups. The alkyl groups are linked to the polymeric backbone through ester linkages, secondary amine linkages, or, preferably, amide linkages.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: July 6, 2004
    Assignee: Nanomimetics, Inc.
    Inventors: Roger E. Marchant, Tianhong Zhang, Yongxing Qiu, Mark A. Ruegsegger
  • Patent number: 6726518
    Abstract: A method for making an electrode structure and an electrode structure for a display device comprising a gate electrode proximate to an emitter and a focusing electrode separated from the gate electrode by an insulating layer containing a ridge. When the focusing electrode is an aperture-type electrode, the upper surface of the ridge protrudes closer to the emitter than the sidewall of the gate electrode or the sidewall of the focusing electrode. When the focusing electrode is a concentric-type electrode, the ridge protrudes above the upper surface of the gate electrode or the upper surface of the focusing electrode.
    Type: Grant
    Filed: July 19, 2002
    Date of Patent: April 27, 2004
    Assignee: Micron Technology, Inc.
    Inventors: Benham Moradi, Zhong-Yi Xia, Tianhong Zhang
  • Publication number: 20040027051
    Abstract: An electrode structure for a display device comprising a gate electrode proximate to an emitter and a focusing electrode separated from the gate electrode by an insulating layer containing a ridge. When the focusing electrode is an aperture-type electrode, the ridge protrudes closer to the emitter than the sidewall of the gate electrode or the sidewall of the focusing electrode. When the focusing electrode is a concentric-type electrode, the ridge protrudes above the upper surface of the gate electrode or the upper surface of the focusing electrode. A method for making the aperture-type and concentric-type electrode structures is described. A display device containing such electrode structures is also described. By forming an insulating ridge between the gate and focusing electrodes, shorting between the two electrodes is reduced and yield enhancement increased.
    Type: Application
    Filed: August 4, 2003
    Publication date: February 12, 2004
    Inventors: Benham Moradi, Zhong-Yi Xia, Tianhong Zhang
  • Patent number: 6630781
    Abstract: An electrode structure for a display device comprising a gate electrode proximate to an emitter and a focusing electrode separated from the gate electrode by an insulating layer containing a ridge. When the focusing electrode is an aperture-type electrode, the ridge protrudes closer to the emitter than the sidewall of the gate electrode or the sidewall of the focusing electrode. When the focusing electrode is a concentric-type electrode, the ridge protrudes above the upper surface of the gate electrode or the upper surface of the focusing electrode. A method for making the aperture-type and concentric-type electrode structures is described. A display device containing such electrode structures is also described. By forming an insulating ridge between the gate and focusing electrodes, shorting between the two electrodes is reduced and yield enhancement increased.
    Type: Grant
    Filed: June 20, 2001
    Date of Patent: October 7, 2003
    Assignee: Micron Technology, Inc.
    Inventors: Benham Moradi, Zhong-Yi Xia, Tianhong Zhang
  • Publication number: 20030143570
    Abstract: A method is provided for immobilizing a ligand, e.g., a nucleic acid, on a solid support. The method includes providing a solid support containing an immobilized latent thiol group, activating the thiol group, contacting the activated thiol group with a nucleic acid comprising an acrylamide functional group, and forming a covalent bond between the two groups, thereby immobilizing the nucleic acid to the solid support. Kits containing the solid supports and method of utilizing the solid supports are also provided.
    Type: Application
    Filed: August 1, 2002
    Publication date: July 31, 2003
    Applicant: Matrix Technologies Corporation
    Inventors: Ezra S. Abrams, Tianhong Zhang, Slawomir Mielewczyk, Brian C. Patterson
  • Publication number: 20030143569
    Abstract: A method is provided for immobilizing a ligand, e.g., a nucleic acid, on a solid support. The method includes providing a solid support containing an immobilized latent thiol group, activating the thiol group, contacting the activated thiol group with a nucleic acid comprising an acrylamide functional group, and forming a covalent bond between the two groups, thereby immobilizing the nucleic acid to the solid support. Kits containing the solid supports and method of utilizing the solid supports are also provided.
    Type: Application
    Filed: August 1, 2002
    Publication date: July 31, 2003
    Applicant: Matrix Technologies Corporation
    Inventors: Ezra S. Abrams, Tianhong Zhang, Slawomir Mielewczyk, Brian C. Patterson
  • Patent number: RE40490
    Abstract: A method and apparatus for programmable field emission display comprising an array of cathodoluminescent elements. Each cathodoluminescent element in the array is responsive to separate select signals to cause light to be emitted from said display at a location in the array corresponding to each separate cathodoluminescent element. In one embodiment, to account for processing variation and the like, each cathodoluminescent element is provided with a programmable element for adjusting the operating level of the associated cathodoluminescent element in response to select signals of predetermined voltage levels. Each programmable element includes a charge storage device and is initially programmed by storing a level of electric charge thereon such that uniformity of operation among the plurality of cathodoluminescent elements in the array is improved. In one embodiment the programmable element comprises a floating gate transistor.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: September 9, 2008
    Assignee: Micron Technology, Inc.
    Inventors: Tianhong Zhang, Zhongyi Xia, John Lee, Benham Moradi