Patents by Inventor Wei Wei An

Wei Wei An 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: 7214583
    Abstract: Asymmetrically structured memory cells and a fabrication method are provided. The method comprises: forming a bottom electrode; forming an electrical pulse various resistance (EPVR) first layer having a polycrystalline structure over the bottom electrode; forming an EPVR second layer adjacent the first layer, with a nano-crystalline or amorphous structure; and, forming a top electrode overlying the first and second EPVR layers. EPVR materials include CMR, high temperature super conductor (HTSC), or perovskite metal oxide materials. In one aspect, the EPVR first layer is deposited with a metalorganic spin coat (MOD) process at a temperature in the range between 550 and 700 degrees C. The EPVR second layer is formed at a temperature less than, or equal to the deposition temperature of the first layer. After a step of removing solvents, the MOD deposited EPVR second layer is formed at a temperature less than, or equal to the 550 degrees C.
    Type: Grant
    Filed: May 16, 2005
    Date of Patent: May 8, 2007
    Assignee: Sharp Laboratories of America, Inc.
    Inventors: Sheng Teng Hsu, Tingkai Li, David R. Evans, Wei-Wei Zhuang, Wei Pan
  • Patent number: 7192792
    Abstract: Resistive cross point memory devices are provided, along with methods of manufacture and use, including a method of changing an electrically programmable resistance cross point memory bit. The memory device comprises an active layer of perovskite material interposed between upper electrodes and lower electrodes. A bit region located within the active layer at the cross point of an upper electrode and a lower electrode has a resistivity that can change through a range of values in response to application of one, or more voltage pulses. Voltage pulses may be used to increase the resistivity of the bit region, decrease the resistivity of the bit region, or determine the resistivity of the bit region. Memory circuits are provided to aid in the programming and read out of the bit region.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: March 20, 2007
    Assignee: Sharp Laboratories of America, Inc.
    Inventors: Sheng Teng Hsu, Wei-Wei Zhuang
  • Patent number: 7193267
    Abstract: Resistive cross-point memory devices are provided, along with methods of manufacture and use. The memory devices are comprised by an active layer of resistive memory material interposed between upper electrodes and lower electrodes. A bit region located within the resistive memory material at the cross-point of an upper electrode and a lower electrode has a resistivity that can change through a range of values in response to application of one, or more, voltage pulses. Voltage pulses may be used to increase the resistivity of the bit region, decrease the resistivity of the bit region, or determine the resistivity of the bit region. A diode is formed between at the interface between the resistive memory material and the lower electrodes, which may be formed as doped regions. The resistive cross-point memory device is formed by doping lines within a substrate one polarity, and then doping regions of the lines the opposite polarity to form diodes.
    Type: Grant
    Filed: October 21, 2004
    Date of Patent: March 20, 2007
    Assignee: Sharp Laboratories of America, Inc.
    Inventors: Sheng Teng Hsu, Wei Pan, Wei-Wei Zhuang
  • Publication number: 20070054042
    Abstract: A method of SrCu2O2 spin-on precursor synthesis and low temperature p-type thin film deposition, includes preparing a wafer to receive a spin-coating thereon; selecting metalorganic compounds to form a SrCu2O2 precursor, mixing and refluxing the metalorganic compounds to form a precursor mixture; filtering the precursor mixture to produce a spin-coating precursor; applying the spin-coating precursor to the wafer in a two-step spin coating procedure; baking the spin-coated wafer using a hot-plate bake to evaporate substantially all of the solvents; and annealing the spin-coated wafer to form a SrCu2O2 layer thereon in a two-step post-anneal process.
    Type: Application
    Filed: September 6, 2005
    Publication date: March 8, 2007
    Inventors: Wei-Wei Zhuang, Yoshi Ono, Wei Gao
  • Publication number: 20070048795
    Abstract: The present invention provides compositions and methods for immunoaffinity separation of targets from mixtures for enrichment, identification, quantification, and analysis. In particular, disclosed are avian IgY antibodies coupled to solid supports and their methods of use. Further disclosed are systems and methods for fractionating or enrichment a mixture of biological materials in an automated multiplex and high-throughput platform or system.
    Type: Application
    Filed: August 23, 2006
    Publication date: March 1, 2007
    Inventors: Xiangming Fang, Lei Huang, Wei-Wei Zhang
  • Publication number: 20070048990
    Abstract: A method of buffer layer formation for RRAM thin film deposition includes preparing a substrate; depositing a bottom electrode on the substrate; depositing a thin layer of a transition metal having a multiple valence on the bottom electrode; depositing a layer of metal oxide on the transition metal; depositing a top electrode on the metal oxide; annealing the substrate and the layers formed thereon; and completing the RRAM.
    Type: Application
    Filed: August 30, 2005
    Publication date: March 1, 2007
    Inventors: Wei-Wei Zhuang, Sheng Hsu, David Evans, Tingkai Li, Lawrence Charneski
  • Patent number: 7166485
    Abstract: A superlattice nanocrystal Si—SiO2 electroluminescence (EL) device and fabrication method have been provided. The method comprises: providing a Si substrate; forming an initial SiO2 layer overlying the Si substrate; forming an initial polysilicon layer overlying the initial SiO2 layer; forming SiO2 layer overlying the initial polysilicon layer; repeating the polysilicon and SiO2 layer formation, forming a superlattice; doping the superlattice with a rare earth element; depositing an electrode overlying the doped superlattice; and, forming an EL device. In one aspect, the polysilicon layers are formed by using a chemical vapor deposition (CVD) process to deposit an amorphous silicon layer, and annealing. Alternately, a DC-sputtering process deposits each amorphous silicon layer, and following the forming of the superlattice, polysilicon is formed by annealing the amorphous silicon layers. Silicon dioxide can be formed by either thermal annealing or by deposition using a DC-sputtering process.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: January 23, 2007
    Assignee: Sharp Laboratories of America, Inc.
    Inventors: Tingkai Li, Sheng Teng Hsu, Wei-Wei Zhuang
  • Publication number: 20070015329
    Abstract: A method is provided for forming a metal/semiconductor/metal (MSM) current limiter and resistance memory cell with an MSM current limiter. The method comprises: providing a substrate; forming an MSM bottom electrode overlying the substrate; forming a ZnOx semiconductor layer overlying the MSM bottom electrode, where x is in the range between about 1 and about 2, inclusive; and, forming an MSM top electrode overlying the semiconductor layer. The ZnOx semiconductor can be formed through a number of different processes such as spin-coating, direct current (DC) sputtering, radio frequency (RF) sputtering, metalorganic chemical vapor deposition (MOCVD), or atomic layer deposition (ALD).
    Type: Application
    Filed: August 31, 2005
    Publication date: January 18, 2007
    Inventors: Tingkai Li, Sheng Hsu, Wei-Wei Zhuang, David Evans
  • Publication number: 20070010037
    Abstract: A superlattice nanocrystal Si—SiO2 electroluminescence (EL) device and fabrication method have been provided. The method comprises: providing a Si substrate; forming an initial SiO2 layer overlying the Si substrate; forming an initial polysilicon layer overlying the initial SiO2 layer; forming SiO2 layer overlying the initial polysilicon layer; repeating the polysilicon and SiO2 layer formation, forming a superlattice; doping the superlattice with a rare earth element; depositing an electrode overlying the doped superlattice; and, forming an EL device. In one aspect, the polysilicon layers are formed by using a chemical vapor deposition (CVD) process to deposit an amorphous silicon layer, and annealing. Alternately, a DC-sputtering process deposits each amorphous silicon layer, and following the forming of the superlattice, polysilicon is formed by annealing the amorphous silicon layers. Silicon dioxide can be formed by either thermal annealing or by deposition using a DC-sputtering process.
    Type: Application
    Filed: July 5, 2005
    Publication date: January 11, 2007
    Inventors: Tingkai Li, Sheng Hsu, Wei-Wei Zhuang
  • Patent number: 7157287
    Abstract: A method of fabricating a CMR thin film for use in a semiconductor device includes preparing a CMR precursor in the form of a metal acetate based acetic acid solution; preparing a wafer; placing a wafer in a spin-coating chamber; spin-coating and heating the wafer according to the following: injecting the CMR precursor into a spin-coating chamber and onto the surface of the wafer in the spin-coating chamber; accelerating the wafer to a spin speed of between about 1500 RPM to 3000 RPM for about 30 seconds; baking the wafer at a temperature of about 180° C. for about one minute; ramping the temperature to about 230° C.; baking the wafer for about one minute at the ramped temperature; annealing the wafer at about 500° C. for about five minutes; repeating said spin-coating and heating steps at least three times; post-annealing the wafer at between about 500° C. to 600° C. for between about one to six hours in dry, clean air; and completing the semiconductor device.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: January 2, 2007
    Assignee: Sharp Laboratories of America, Inc.
    Inventors: Wei-Wei Zhuang, Tingkai Li, Wei Pan, David R. Evans, Sheng Teng Hsu
  • Patent number: 7141481
    Abstract: A method of fabricating a nano-scale resistance cross-point memory array includes preparing a silicon substrate; depositing silicon oxide on the substrate to a predetermined thickness; forming a nano-scale trench in the silicon oxide; depositing a first connection line in the trench; depositing a memory resistor layer in the trench on the first connection line; depositing a second connection line in the trench on the memory resistor layer; and completing the memory array. A cross-point memory array includes a silicon substrate; a first connection line formed on the substrate; a colossal magnetoresistive layer formed on the first connection line; a silicon nitride layer formed on a portion of the colossal magnetoresistive layer; and a second connection line formed adjacent the silicon nitride layer and on the colossal magnetoresistive layer.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: November 28, 2006
    Assignee: Sharp Laboratories of America, Inc.
    Inventors: Sheng Teng Hsu, Wei-Wei Zhuang, Wei Pan, Fengyan Zhang
  • Patent number: 7136871
    Abstract: A system, including a planning module, a control module and a receiver module, configured to schedule display of one or more advertising impressions of available advertising inventory. The planning module enables scheduling a requested quantity of advertising impressions in accordance with target criteria. Further, the planning module enables selecting an advertising impression goal for advertisement, assigning an advertising type and defining a weight for the advertisements. The control module receives the schedule, the advertising type and the defined weights and generates one or more metadata files that contain target criteria, advertising type and weights for the advertisements. The one or more metadata files, with the advertisements, are delivered to the receiver module that is configured to define a display frequency for the advertisements based upon one or more of the metadata files.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: November 14, 2006
    Assignee: Microsoft Corporation
    Inventors: Stuart Ozer, Michael Patrick Hart, Wei Wei Ada Cho, Carolyn Khanh Chau
  • Publication number: 20060246606
    Abstract: A method of fabricating resistor memory array includes preparing a silicon substrate; depositing a bottom electrode, a sacrificial layer, and a hard mask layer on a substrate P+ layer; masking, patterning and etching to remove, in a first direction, a portion of the hard mask, the sacrificial material, the bottom electrode; depositing a layer of silicon oxide; masking, patterning and etching to remove, in a second direction perpendicular to the first direction, a portion of the hard mask, the sacrificial material, the bottom electrode;, and over etching to an N+ layer and at least 100 nm of the silicon substrate; depositing of a layer of silicon oxide; etching to remove any remaining hard mask and any remaining sacrificial material; depositing a layer of CMR material; depositing a top electrode; applying photoresist, patterning the photoresist and etching the top electrode; and incorporating the memory array into an integrated circuit.
    Type: Application
    Filed: May 2, 2005
    Publication date: November 2, 2006
    Inventors: Sheng Hsu, Jong-Jan Lee, Jer-Shen Maa, Douglas Tweet, Wei-Wei Zhuang
  • Publication number: 20060214172
    Abstract: A nanotip electroluminescence (EL) diode and a method are provided for fabricating said device. The method comprises: forming a plurality of Si nanotip diodes; forming a phosphor layer overlying the nanotip diode; and, forming a top electrode overlying the phosphor layer. The nanotip diodes are formed by: forming a Si substrate with a top surface; forming a Si p-well; forming an n+ layer of Si, having a thickness in the range of 30 to 300 nanometers (nm) overlying the Si p-well; forming a reactive ion etching (RIE)-induced polymer grass overlying the substrate top surface; using the RIE-induced polymer grass as a mask, etching areas of the substrate not covered by the mask; and, forming the nanotip diodes in areas of the substrate covered by the mask.
    Type: Application
    Filed: March 23, 2005
    Publication date: September 28, 2006
    Inventors: Sheng Hsu, Tingkai Li, Wei-Wei Zhuang
  • Patent number: 7110311
    Abstract: A sense amplifier has a charge sharing compensator to eliminate wake-up delays in an output signal. The charge sharing compensator comprises a capacitor or a charge storing means to compensate for charges in a charge sharing path that has two different voltage potentials. The compensator also has a transistor for selecting a signal path to transfer charges from the capacitor, eliminating charge sharing in the bit line path of the sense amplifier. Another aspect of the present invention is a method for resolving charge sharing problems that comprises steps of choosing a proper value for a compensating capacitor, choosing a control signal for a charge sharing compensation means, and clamping down an input terminal of the sense amplifier.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: September 19, 2006
    Assignee: Atmel Corporation
    Inventor: Wei Wei
  • Patent number: 7109179
    Abstract: The present invention relates to the use of tumor suppressor genes in combination with a DNA damaging agent or factor for use in killing cells, and in particular cancerous cells. A tumor suppressor gene, p53, was delivered via a recombinant adenovirus-mediated gene transfer both in vitro and in vivo, in combination with a chemotherapeutic agent. Treated cells underwent apoptosis with specific DNA fragmentation. Direct injection of the p53-adenovirus construct into tumors subcutaneously, followed by intraperitoneal administration of a DNA damaging agent, cisplatin, induced massive apoptotic destruction of the tumors. The invention also provides for the clinical application of a regimen combining gene replacement using replication-deficient wild-type p53 adenovirus and DNA-damaging drugs for treatment of human cancer.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: September 19, 2006
    Assignee: Board of Regents, the University of Texas System
    Inventors: Jack A. Roth, Toshiyoshi Fujiwara, Elizabeth A. Grimm, Tapas Mukhopadhyay, Wei-Wei Zhang, Laurie B. Owen-Schaub
  • Patent number: 7105326
    Abstract: Genes encoding phenylalanine ammonia-lyase (PAL), tyrosine ammonia lyase (TAL) and phenylalanine hydroxylase (PAH) have been introduced into a host organism for the production of Para-hydroxycinnamic acid (PHCA). The introduction of these genes results in the redirection of carbon flow in the host, optimizing the flow of carbon from glucose to PHCA. The intermediates, tyrosine and cinnamic acid are also produced.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: September 12, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Wei Wei Qi, Fateme Sima Sariaslani, Xiao-Song Tang
  • Publication number: 20060194403
    Abstract: PrCaMnO (PCMO) thin films with predetermined memory-resistance characteristics and associated formation processes have been provided. In one aspect the method comprises: forming a Pr3+1?xCa2+xMnO thin film composition, where 0.1<x<0.6; in response to the selection of x, varying the ratio of Mn and O ions as follows: O2? (3±20%); Mn3+ ((1?x)±20%); and, Mn4+ (x±20%). When the PCMO thin film has a Pr3+0.70Ca2+0.30Mn3+0.78Mn4+0.22O2?2.96 composition, the ratio of Mn and O ions varies as follows: O2? (2.96); Mn3+ ((1?x)+8%); and, Mn4+ (x?8%). In another aspect, the method creates a density in the PCMO film, responsive to the crystallographic orientation. For example, if the PCMO film has a (110) orientation, a density is created in the range of 5 to 6.76 Mn atoms per 100 ?2 in a plane perpendicular to the (110) orientation.
    Type: Application
    Filed: March 17, 2006
    Publication date: August 31, 2006
    Inventors: Tingkai Li, Wei-Wei Zhuang, David Evans, Sheng Hsu
  • Patent number: 7098043
    Abstract: A Pr1-XCaXMnO3 (PCMO) spin-coat deposition method for eliminating voids is provided, along with a void-free PCMO film structure. The method comprises: forming a substrate, including a noble metal, with a surface; forming a feature, such as a via or trench, normal with respect to the substrate surface; spin-coating the substrate with acetic acid; spin-coating the substrate with a first, low concentration of PCMO solution; spin-coating the substrate with a second concentration of PCMO solution, having a greater concentration of PCMO than the first concentration; baking and RTA annealing (repeated one to five times); post-annealing; and, forming a PCMO film with a void-free interface between the PCMO film and the underlying substrate surface. The first concentration of PCMO solution has a PCMO concentration in the range of 0.01 to 0.1 moles (M). The second concentration of PCMO solution has a PCMO concentration in the range of 0.2 to 0.5 M.
    Type: Grant
    Filed: January 15, 2004
    Date of Patent: August 29, 2006
    Assignee: Sharp Laboratories of America, Inc.
    Inventors: Wei-Wei Zhuang, Lisa H. Stecker, Gregory M. Stecker, Sheng Teng Hsu
  • Publication number: 20060182718
    Abstract: The present invention relates to the use of tumor suppressor genes in combination with a DNA damaging agent or factor for use in killing cells, and in particular cancerous cells. A tumor suppressor gene, p53, was delivered via a recombinant adenovirus-mediated gene transfer both in vitro and in vivo, in combination with a chemotherapeutic agent. Treated cells underwent apoptosis with specific DNA fragmentation. Direct injection of the p53-adenovirus construct into tumors subcutaneously, followed by intraperitoneal administration of a DNA damaging agent, cisplatin, induced massive apoptotic destruction of the tumors. The invention also provides for the clinical application of a regimen combining gene replacement using replication-deficient wild-type p53 adenovirus and DNA-damaging drugs for treatment of human cancer.
    Type: Application
    Filed: February 6, 2006
    Publication date: August 17, 2006
    Inventors: Jack Roth, Toshiyoshi Fujiwara, Elizabeth Grimm, Tapas Mukhopadhyay, Wei-Wei Zhang, Laurie Owen-Schaub