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    • 41. 发明授权
    • Circuit and system of using at least one junction diode as program selector for memories
    • 使用至少一个结二极管作为存储器的程序选择器的电路和系统
    • US08760916B2
    • 2014-06-24
    • US13026835
    • 2011-02-14
    • Shine C. Chung
    • Shine C. Chung
    • G11C11/15
    • H01L27/2436G11C8/14G11C11/1659G11C11/1675G11C13/0002G11C13/0004G11C13/0007G11C13/0011G11C13/0028G11C13/003G11C13/004G11C13/0069G11C17/16G11C17/165G11C2013/0073G11C2213/72G11C2213/74H01L27/224H01L27/2409H01L29/785H01L45/04H01L45/06H01L45/085H01L45/1233H01L45/144H01L45/146
    • At least one junction diode fabricated in standard CMOS logic processes can be used as program selectors for memory cells that can be programmed based on direction of current flow. These cells are MRAM, RRAM, CBRAM, or other memory cells that have a programmable resistive element coupled to a P terminal of a first diode and to an N terminal of a second diode. The diodes can be constructed by P+ and N+ active regions on an N well as the P and N terminals of the diodes. The memory cells can be used to construct a two-dimensional memory array with the N terminals of the first diodes and the P terminals of the second diodes in a row connected as wordline(s) and the resistive elements in a column connected as a bitline. By applying a high voltage to a selected bitline and a low voltage to a selected wordline to turn on the first diode while disabling the second diode, a selected cell can be programmed into one state. Similarly, by applying a low voltage to a selected bitline and a high voltage to a selected wordline to turn on the second diode while disabling the first diode, a selected cell can be programmed into another state. The data in the resistive memory cell can also be read by turning on a selected wordline to couple a selected bitline to a sense amplifier. The wordlines may have high-resistivity local wordlines coupled to low-resistivity global wordlines through conductive contact(s) or via(s).
    • 在标准CMOS逻辑工艺中制造的至少一个结二极管可用作可根据电流方向编程的存储器单元的程序选择器。 这些单元是具有耦合到第一二极管的P端子和第二二极管的N端子的可编程电阻元件的MRAM,RRAM,CBRAM或其它存储器单元。 二极管可以由N阱上的P +和N +有源区域构成,作为二极管的P和N端子。 存储单元可用于构建二维存储器阵列,其中第一二极管的N端和第二二极管的P端作为字线连接,并且作为位线连接的列中的电阻元件作为位线 。 通过将高电压施加到所选择的位线和低电压到所选择的字线以在禁用第二二极管的同时接通第一二极管,所选择的单元可以被编程为一个状态。 类似地,通过将​​低电压施加到所选择的位线和高电压到所选择的字线以在禁用第一二极管的同时接通第二二极管,所选择的单元可以被编程到另一状态。 也可以通过打开所选择的字线来读取电阻存储器单元中的数据,以将选定的位线耦合到读出放大器。 字线可以具有通过导电接触或通孔耦合到低电阻率全局字线的高电阻率局部字线。