Patents by Inventor Lei Xue

Lei Xue 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: 20110317466
    Abstract: Providing for a serial array memory transistor architecture that achieves high read speeds compared with conventional serial array memory is described herein. By way of example, the serial array memory can be connected to and can drive a gate voltage of a small capacitance pass transistor, to facilitate sensing memory transistors of the serial array. The pass transistor modulates current flow or voltage at an adjacent metal bitline, which can be utilized to sense a program or erase state(s) of the memory transistors. Due to the small capacitance of the pass transistor, read latency for the serial array can be significantly lower than conventional serial array memory (e.g., NAND memory). Further, various mechanisms for forming an amplifier region of the serial array memory comprising discrete pass transistor are described to facilitate efficient fabrication of the serial array memory transistor architecture.
    Type: Application
    Filed: June 28, 2010
    Publication date: December 29, 2011
    Applicant: SPANSION LLC
    Inventors: Richard Fastow, Hagop Nazarian, Lei Xue
  • Publication number: 20110278660
    Abstract: Memory devices having improved TPD characteristics and methods of making the memory devices are provided. The memory devices contain two or more memory cells on a semiconductor substrate and bit line openings containing a bit line dielectric between the memory cells. The memory cell contains a charge storage layer and a first poly gate. The bit line opening extends into the semiconductor substrate. By containing the bit line dielectric in the bit line openings that extend into the semiconductor substrate, the memory device can improve the electrical isolation between memory cells, thereby preventing and/or mitigating TPD.
    Type: Application
    Filed: July 26, 2011
    Publication date: November 17, 2011
    Applicant: SPANSION LLC
    Inventors: Ning Cheng, K.T. Chang, Hiro Kinoshita, Chih-Yuh Yang, Lei Xue, Chungho Lee, Minghao Shen, Angela Hui, Huaqiang Wu
  • Patent number: 8012830
    Abstract: Memory devices having improved TPD characteristics and methods of making the memory devices are provided. The memory devices contain two or more memory cells on a semiconductor substrate and bit line openings containing a bit line dielectric between the memory cells. The memory cell contains a charge storage layer and a first poly gate. The bit line opening extends into the semiconductor substrate. By containing the bit line dielectric in the bit line openings that extend into the semiconductor substrate, the memory device can improve the electrical isolation between memory cells, thereby preventing and/or mitigating TPD.
    Type: Grant
    Filed: August 8, 2007
    Date of Patent: September 6, 2011
    Assignee: Spansion LLC
    Inventors: Ning Cheng, Kuo-Tung Chang, Hiro Kinoshita, Chih-Yuh Yang, Lei Xue, Chungho Lee, Minghao Shen, Angela Hui, Huaqiang Wu
  • Patent number: 7951675
    Abstract: Memory devices having improved BVdss characteristics and methods of making the memory devices are provided. The memory devices contain bitline dielectrics on bitlines of a semiconductor substrate; first spacers adjacent the side surfaces of the bitline dielectrics and on the upper surface of the semiconductor substrate; a trench in the semiconductor substrate between the first spacers; and second spacers adjacent the side surfaces of the trench. By containing the trench and the first and second spacers between the bitlines, the memory device can improve the electrical isolation between the bitlines, thereby preventing and/or mitigating bitline-to-bitline current leakage and increasing BVdss.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: May 31, 2011
    Assignee: Spansion LLC
    Inventors: Lei Xue, Aimin Xing, Chih-Yuh Yang, Angela Hui, Chungho Lee
  • Patent number: 7906807
    Abstract: Memory devices having improved TPD characteristics and methods of making the memory devices are provided. The memory devices contain two or more memory cells on a semiconductor substrate and bit line dielectrics between the memory cells. The bit line dielectrics can extend into the semiconductor. The memory cell contains one or more charge storage nodes, a first poly gate, a pair of first bit lines, and a pair of second bit lines. The second bit line can be formed at a higher energy level, a higher concentration of dopants, or a combination thereof compared to an energy level and a concentration of dopants of the first bit line.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: March 15, 2011
    Assignee: Spansion LLC
    Inventors: Ning Cheng, Calvin Gabriel, Angela Hui, Lei Xue, Harpreet Kaur Sachar, Phillip Lawrence Jones, Hiro Kinoshita, Kuo-Tung Chang, Huaqiang Wu
  • Publication number: 20100264480
    Abstract: Memory devices having improved TPD characteristics and methods of making the memory devices are provided. The memory devices contain two or more memory cells on a semiconductor substrate and bit line dielectrics between the memory cells. The bit line dielectrics can extend into the semiconductor. The memory cell contains one or more charge storage nodes, a first poly gate, a pair of first bit lines, and a pair of second bit lines. The second bit line can be formed at a higher energy level, a higher concentration of dopants, or a combination thereof compared to an energy level and a concentration of dopants of the first bit line.
    Type: Application
    Filed: June 30, 2010
    Publication date: October 21, 2010
    Applicant: SPANSION LLC
    Inventors: Ning Cheng, Calvin Gabriel, Angela Hui, Lei Xue, Harpreet Kaur Sachar, Phillip Lawrence Jones, Hiro Kinoshita, K.T Chang, Huaqiang Wu
  • Patent number: 7816724
    Abstract: A memory device (100) may include a substrate (110), a dielectric layer (210) formed on the substrate (110) and a charge storage element (220) formed on the dielectric layer (210). The memory device (100) may also include an inter-gate dielectric (230) formed on the charge storage element (220), a barrier layer (240) formed on the inter-gate dielectric (230) and a control gate (250) formed on the barrier layer (240). The barrier layer (240) prevents reaction between the control gate (250) and the inter-gate dielectric (230).
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: October 19, 2010
    Assignee: Spansion LLC
    Inventors: Youseok Suh, Satoshi Torii, Lei Xue
  • Publication number: 20100213535
    Abstract: Semiconductor devices having reduced parasitic current and methods of malting the semiconductor devices are provided. Further provided are memory devices having reduced adjacent wordline disturb. The memory devices contain wordlines formed over a semiconductor substrate, wherein at least one wordline space is formed between the wordlines. Adjacent wordline disturb is reduced by implanting one or more of indium, boron, and a combination of boron and indium in the surface of the at least one wordline space.
    Type: Application
    Filed: February 23, 2009
    Publication date: August 26, 2010
    Applicant: SPANSION LLC
    Inventors: Gulzar A. Kathawala, Zhizheng Liu, Kuo Tung Chang, Lei Xue
  • Patent number: 7776688
    Abstract: Memory devices having improved TPD characteristics and methods of making the memory devices are provided. The memory devices contain two or more memory cells on a semiconductor substrate and bit line dielectrics between the memory cells. The bit line dielectrics can extend into the semiconductor. The memory cell contains one or more charge storage nodes, a first poly gate, a pair of first bit lines, and a pair of second bit lines. The second bit line can be formed at a higher energy level, a higher concentration of dopants, or a combination thereof compared to an energy level and a concentration of dopants of the first bit line.
    Type: Grant
    Filed: August 8, 2007
    Date of Patent: August 17, 2010
    Assignee: Spansion LLC
    Inventors: Ning Cheng, Calvin Gabriel, Angela Hui, Lei Xue, Harpreet Kaur Sachar, Phillip Lawrence Jones, Hiro Kinoshita, Kuo-Tung Chang, Huaqiang Wu
  • Publication number: 20090152669
    Abstract: Memory devices having improved BVdss characteristics and methods of making the memory devices are provided. The memory devices contain bitline dielectrics on bitlines of a semiconductor substrate; first spacers adjacent the side surfaces of the bitline dielectrics and on the upper surface of the semiconductor substrate; a trench in the semiconductor substrate between the first spacers; and second spacers adjacent the side surfaces of the trench. By containing the trench and the first and second spacers between the bitlines, the memory device can improve the electrical isolation between the bitlines, thereby preventing and/or mitigating bitline-to-bitline current leakage and increasing BVdss.
    Type: Application
    Filed: December 17, 2007
    Publication date: June 18, 2009
    Applicant: SPANSION LLC
    Inventors: Lei Xue, Aimin Xing, Chih-Yuh Yang, Angela Hui, Chungho Lee
  • Publication number: 20090039405
    Abstract: Memory devices having improved TPD characteristics and methods of making the memory devices are provided. The memory devices contain two or more memory cells on a semiconductor substrate and bit line openings containing a bit line dielectric between the memory cells. The memory cell contains a charge storage layer and a first poly gate. The bit line opening extends into the semiconductor substrate. By containing the bit line dielectric in the bit line openings that extend into the semiconductor substrate, the memory device can improve the electrical isolation between memory cells, thereby preventing and/or mitigating TPD.
    Type: Application
    Filed: August 8, 2007
    Publication date: February 12, 2009
    Applicant: SPANSION LLC
    Inventors: Ning Cheng, K.T. Chang, Hiro Kinoshita, Chih-Yuh Yang, Lei Xue, Chungho Lee, Minghao Shen, Angela Hui, Huaqiang Wu
  • Publication number: 20090042378
    Abstract: Memory devices having improved TPD characteristics and methods of making the memory devices are provided. The memory devices contain two or more memory cells on a semiconductor substrate and bit line dielectrics between the memory cells. The bit line dielectrics can extend into the semiconductor. The memory cell contains one or more charge storage nodes, a first poly gate, a pair of first bit lines, and a pair of second bit lines. The second bit line can be formed at a higher energy level, a higher concentration of dopants, or a combination thereof compared to an energy level and a concentration of dopants of the first bit line.
    Type: Application
    Filed: August 8, 2007
    Publication date: February 12, 2009
    Applicant: SPANSION LLC
    Inventors: Ning Cheng, Calvin Gabriel, Angela Hui, Lei Xue, Harpreet Kaur Sachar, Phillip Lawrence Jones, Hiro Kinoshita, K.T. Chang, Huaqiang Wu
  • Patent number: 7416940
    Abstract: Methods for fabricating a flash memory device are provided. A method comprises forming a plurality of gate stacks overlying a substrate. Each gate stack comprises a charge trapping layer and a control gate. The control gate is a first distance from the substrate. Adjacent gate stacks are a second distance apart. A cell spacer material layer is deposited and is etched to form a spacer about sidewalls of each gate stack. A source/drain impurity doped region is formed adjacent a first gate stack and a last gate stack. The first distance and the second distance are such that, when a voltage is applied to a gate stack during a READ operation, a fringing field is created between the control gate of the gate stack and the substrate and is sufficient to invert a portion of the substrate between the gate stack and an adjacent gate stack.
    Type: Grant
    Filed: May 3, 2006
    Date of Patent: August 26, 2008
    Assignee: Spansion LLC
    Inventors: Satoshi Torii, Hidehiko Shiraiwa, Youseok Suh, Lei Xue
  • Publication number: 20080191269
    Abstract: A memory device (100) may include a substrate (110), a dielectric layer (210) formed on the substrate (110) and a charge storage element (220) formed on the dielectric layer (210). The memory device (100) may also include an inter-gate dielectric (230) formed on the charge storage element (220), a barrier layer (240) formed on the inter-gate dielectric (230) and a control gate (250) formed on the barrier layer (240). The barrier layer (240) prevents reaction between the control gate (250) and the inter-gate dielectric (230).
    Type: Application
    Filed: July 21, 2006
    Publication date: August 14, 2008
    Applicant: SPANSION LLC
    Inventors: Youseok Suh, Satoshi Torii, Lei Xue
  • Publication number: 20080150000
    Abstract: A memory system includes a substrate, forming a first insulator over the substrate, forming a charge trap layer, having a composition for setting a predetermined electrical charge level, over the first insulator, and forming a second insulator over the charge trap layer.
    Type: Application
    Filed: December 21, 2006
    Publication date: June 26, 2008
    Applicant: SPANSION LLC
    Inventors: YouSeok Suh, Hidehiko Shiraiwa, Kuo-Tung Chang, Lei Xue, Meng Ding, Amol Ramesh Joshi, Shenqing Fang
  • Publication number: 20080150029
    Abstract: A method for manufacturing a memory system is provided including forming a charge-storage layer on a first insulator layer including insulating the charge-storage layer from a vertical fin, forming a second insulator layer from the charge-storage layer, and forming a gate over the second insulator includes forming a fin field effect transistor.
    Type: Application
    Filed: December 21, 2006
    Publication date: June 26, 2008
    Applicant: SPANSION LLC
    Inventors: Wei Zheng, Lei Xue, Kuo-Tung Chang
  • Publication number: 20080150011
    Abstract: A method for forming an integrated circuit system is provided including forming a substrate having a core region and a periphery region, forming a charge storage stack over the substrate in the core region, forming a gate stack with a stack header having a metal portion over the substrate in the periphery region, and forming a memory system with the stack header over the charge storage stack.
    Type: Application
    Filed: December 18, 2007
    Publication date: June 26, 2008
    Applicants: SPANSION LLC, ADVANCED MICRO DEVICES, INC.
    Inventors: Simon Siu-Sing Chan, Lei Xue, YouSeok Suh, Amol Ramesh Joshi, Hidehiko Shiraiwa, Harpreet Sachar, Kuo-Tung Chang, Connie Pin Chin Wang, Paul R. Besser, Shenqing Fang, Meng Ding, Takashi Orimoto, Wei Zheng, Fred TK Cheung
  • Publication number: 20080083946
    Abstract: A memory cell system is provided including forming a first insulator layer over a semiconductor substrate, forming a charge trap layer over the first insulator layer, and slot plane antenna plasma oxidizing the charge trap layer for forming a second insulator layer.
    Type: Application
    Filed: October 10, 2006
    Publication date: April 10, 2008
    Applicants: SPANSION LLC, ADVANCED MICRO DEVICES, INC.
    Inventors: Shenqing Fang, Rinji Sugino, Jayendra Bhakta, Takashi Orimoto, Hiroyuki Nansei, Yukio Hayakawa, Takayuki Maruyama, Hidehiko Shiraiwa, Kuo-Tung Chang, Lei Xue, Meng Ding, Amol Ramesh Joshi, YouSeok Suh, Harpreet Sachar
  • Publication number: 20080079061
    Abstract: According to one exemplary embodiment, a structure, for example a flash memory cell, comprises a transistor gate dielectric stack situated on a semiconductor substrate. The transistor gate dielectric stack includes a bottom oxide layer, a silicon-rich nitride layer situated on the bottom oxide layer, a low silicon-rich nitride layer situated on the silicon-rich nitride layer, and a top oxide layer situated on the low silicon-rich nitride layer. This embodiment results in a nitride based flash memory cell having improved program speed and retention while maintaining a high erase speed. In another embodiment, a flash memory cell may further comprise a high-K dielectric layer situated on the transistor gate dielectric stack.
    Type: Application
    Filed: September 28, 2006
    Publication date: April 3, 2008
    Inventors: Meng Ding, Amol Joshi, Takashi Orimoto, Jayendra Bhakta, Lei Xue, Satoshi Torii, Robert Bertram Ogle
  • Publication number: 20080023750
    Abstract: A memory cell system is provided including forming a first insulator layer over a semiconductor substrate, forming a charge trap layer over the first insulator layer, forming a second insulator layer over the charge trap layer, forming a top blocking intermediate layer over the second insulator layer, and forming a contact layer over the top blocking intermediate layer.
    Type: Application
    Filed: July 31, 2006
    Publication date: January 31, 2008
    Applicants: SPANSION LLC, ADVANCED MICRO DEVICES, INC.
    Inventors: Lei Xue, Rinji Sugino, YouSeok Suh, Hidehiko Shiraiwa, Meng Ding, Shenqing Fang, Joong Jeon