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    • 13. 发明授权
    • High density NAND non-volatile memory device
    • 高密度NAND非易失性存储器件
    • US07829938B2
    • 2010-11-09
    • US11181345
    • 2005-07-14
    • Arup Bhattacharyya
    • Arup Bhattacharyya
    • H01L29/792
    • H01L29/792G11C16/0475G11C16/0483H01L21/28273H01L27/115H01L27/11521H01L27/11524H01L27/11568H01L29/4232H01L29/42336H01L29/513H01L29/7881
    • Non-volatile memory devices and arrays are described that utilize dual gate (or back-side gate) non-volatile memory cells with band engineered gate-stacks that are placed above or below the channel region in front-side or back-side charge trapping gate-stack configurations in NAND memory array architectures. The band-gap engineered gate-stacks with asymmetric or direct tunnel barriers of the floating node memory cells of embodiments of the present invention allow for low voltage tunneling programming and efficient erase with electrons and holes, while maintaining high charge blocking barriers and deep carrier trapping sites for good charge retention. The memory cell architecture also allows for improved high density memory devices or arrays with the utilization of reduced feature word lines and vertical select gates.
    • 描述了利用双栅极(或背侧栅极)非易失性存储器单元的非易失性存储器件和阵列,其具有放置在前侧或后侧电荷俘获中的沟道区域的上方或下方的带工程化栅极堆叠 NAND存储器阵列架构中的栅极堆叠配置。 具有本发明实施例的浮动节点存储器单元的不对称或直接隧道势垒的带隙工程化栅极堆栈允许低电压隧道编程和电子和空穴的有效擦除,同时保持高电荷阻挡屏障和深载流子俘获 网站保持良好的电荷。 存储单元架构还允许利用减少的特征字线和垂直选择栅极的改进的高密度存储器件或阵列。
    • 15. 发明申请
    • BAND ENGINEERED NANO-CRYSTAL NON-VOLATILE MEMORY DEVICE UTILIZING ENHANCED GATE INJECTION
    • 使用增强门注射的带工程纳米晶体非易失性存储器件
    • US20100072537A1
    • 2010-03-25
    • US12623895
    • 2009-11-23
    • Arup Bhattacharyya
    • Arup Bhattacharyya
    • H01L29/792
    • H01L29/42332B82Y10/00G11C16/0416G11C16/0483G11C2216/06H01L29/513H01L29/7883
    • Non-volatile memory devices and arrays are described that utilize reverse mode non-volatile memory cells that have band engineered gate-stacks and nano-crystal charge trapping in EEPROM and block erasable memory devices, such as Flash memory devices. Embodiments of the present invention allow a reverse mode gate-insulator stack memory cell that utilizes the control gate for programming and erasure through a band engineered crested tunnel barrier. Charge retention is enhanced by utilization of high work function nano-crystals in a non-conductive trapping layer and a high K dielectric charge blocking layer. The band-gap engineered gate-stack with symmetric or asymmetric crested barrier tunnel layers of the non-volatile memory cells of embodiments of the present invention allow for low voltage tunneling programming and erase with electrons and holes, while maintaining high charge blocking barriers and deep carrier trapping sites for good charge retention.
    • 描述了使用具有带工程化栅极堆叠的反向模式非易失性存储器单元和在EEPROM和块可擦除存储器件(例如闪存器件)中的纳米晶体电荷俘获的非易失性存储器件和阵列。 本发明的实施例允许使用控制门的反向模式栅极 - 绝缘体堆叠存储器单元来编程和擦除通过波段设计的波峰隧道势垒。 通过在非导电捕获层和高K介电电荷阻挡层中利用高功函数纳米晶体来提高电荷保持率。 具有本发明实施例的非易失性存储单元的具有对称或非对称顶点势垒隧道层的带隙工程的栅极叠层允许用电子和空穴进行低电压隧道编程和擦除,同时保持高电荷阻挡屏障和深度 载体捕获位点,保持良好的电荷。
    • 20. 发明授权
    • Scalable high performance non-volatile memory cells using multi-mechanism carrier transport
    • 可扩展的高性能非易失性存储单元,采用多机制载体传输
    • US07553735B2
    • 2009-06-30
    • US11821627
    • 2007-06-25
    • Arup Bhattacharyya
    • Arup Bhattacharyya
    • H01L21/20
    • H01L27/11568G11C16/0475H01L27/115H01L29/513H01L29/792H01L29/7926
    • A plurality of select gates are formed over a substrate. In one embodiment, the select gates are formed vertically on the sidewalls of trenches. The substrate includes a plurality of diffusion regions that are each formed between a pair of planar select gates. In a vertical embodiment, the diffusion regions are formed at the bottom of the trenches and the tops of the mesas formed by the trenches. An enriched region is formed in the substrate adjacent to and substantially surrounding each diffusion region in the substrate. Each enriched region has a matching conductivity type with the substrate. A gate insulator stack is formed over the substrate and each of the plurality of select gates. A word line is formed over the gate insulator stack.
    • 在衬底上形成多个选择栅极。 在一个实施例中,选择栅极垂直地形成在沟槽的侧壁上。 衬底包括多个扩散区域,每个扩散区域形成在一对平面选择栅极之间。 在垂直实施例中,扩散区形成在沟槽的底部和由沟槽形成的台面的顶部。 富集区形成在衬底中,并且基本上围绕衬底中的每个扩散区。 每个富集区域与衬底具有匹配的导电类型。 栅极绝缘体堆叠形成在衬底上以及多个选择栅极中的每一个上。 在栅极绝缘体堆叠上形成字线。