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    • 32. 发明授权
    • Nonvolatile semiconductor memory
    • 非易失性半导体存储器
    • US07245534B2
    • 2007-07-17
    • US11135415
    • 2005-05-24
    • Akira GodaMitsuhiro NoguchiMinori KajimotoYuji Takeuchi
    • Akira GodaMitsuhiro NoguchiMinori KajimotoYuji Takeuchi
    • G11C11/34
    • G11C8/10G11C16/0483G11C16/08G11C16/10H01L27/115H01L27/11521
    • A nonvolatile semiconductor memory includes: a memory cell array constituted by word lines, bit lines, and electrically erasable/rewritable memory cell transistors, which have respective tunnel insulating films and are arranged at the intersections of the word lines and the bit lines; and a word line transfer transistor, which is separated by an element isolation region, has a source diffusion layer, a channel region, a gate insulating film on the channel region, and a drain diffusion layer, and is connected to a word line and a gate electrode formed on the gate insulating film via a word line contact plug formed in the drain diffusion layer. The channel width of the word line transfer transistor is at least six times width of the word line contact plug, and the distance in a second direction between the word line contact plug and corresponding element isolation region is greater than distance in a first direction between the word line contact plug and corresponding element isolation region where, the first direction denotes a direction from the source diffusion layer towards the drain diffusion layer, and the second direction denotes a direction perpendicular to the first direction.
    • 非易失性半导体存储器包括:由字线,位线和电可擦除/可重写存储单元晶体管构成的存储单元阵列,其具有相应的隧道绝缘膜并且布置在字线和位线的交点处; 并且由元件隔离区隔开的字线传输晶体管在沟道区上具有源极扩散层,沟道区,栅极绝缘膜和漏极扩散层,并且连接到字线和 栅极通过形成在漏极扩散层中的字线接触插塞形成在栅极绝缘膜上。 字线传输晶体管的沟道宽度是字线接触插塞的至少六倍宽度,并且字线接触插塞和对应元件隔离区域之间的第二方向上的距离大于第二方向上的距离 字线接触插塞和对应元件隔离区域,其中第一方向表示从源极扩散层朝向漏极扩散层的方向,第二方向表示与第一方向垂直的方向。
    • 37. 发明申请
    • Semiconductor memory
    • US20050141291A1
    • 2005-06-30
    • US11068228
    • 2005-03-01
    • Mitsuhiro NoguchiAkira GodaYasuhiko Matsunaga
    • Mitsuhiro NoguchiAkira GodaYasuhiko Matsunaga
    • G11C16/06G11C16/04G11C16/26H01L21/8247H01L27/10H01L27/115H01L29/788H01L29/792G11C11/34
    • G11C16/26G11C16/0483H01L27/115
    • A semiconductor memory including a memory cell unit, the memory cell unit comprising: a plurality of memory cells in which each conductance between current terminals changes according to held data, each having a plurality of current terminals connected in series between a first terminal and a second terminal, and each capable of electrically rewriting the data; a first select switching element electrically connecting said first terminal to a data transfer line; and a MISFET serving as a second select switching element connecting said second terminal to a reference potential line, wherein said semiconductor memory has a data read mode for forcing the first and second select switching elements of said memory cell unit into conduction, applying a read voltage for forcing a path between the current terminals into conduction or cut-off according to the data of a selected memory cell, to a control electrode of the selected memory cell, applying a pass voltage for forcing a path between the current terminals into conduction irrespectively of the data of each of the memory cells other than said selected memory cell, to the control electrode of each of the memory cells other than said selected memory cell, and detecting presence and absence or magnitude of a current between said data transfer line and said reference potential line, and in said data read mode, a conductance between current terminals of said MISFET is set lower than a conductance, in the case where the conductance between the current terminals is set to be the lowest, with regards to at least one of the memory cells other than said selected memory cell.
    • 40. 发明授权
    • Semiconductor memory device that is resistant to high voltages and a method of manufacturing the same
    • 耐高电压的半导体存储器件及其制造方法
    • US07919389B2
    • 2011-04-05
    • US12498149
    • 2009-07-06
    • Akira GodaMitsuhiro Noguchi
    • Akira GodaMitsuhiro Noguchi
    • H01L21/76
    • H01L27/115H01L27/105H01L27/11568H01L27/11573
    • A semiconductor memory device having a memory cell region and a peripheral circuit region, and a method of manufacturing such a semiconductor memory device, are proposed, in which trench grooves are formed to be shallow in the memory cell region in order to improve the yield, and trench grooves are formed to be deep in the high voltage transistor region of the peripheral circuit region, in particular in a high voltage transistor region thereof, in order to improve the element isolation withstand voltage. A plurality of memory cell transistors having an ONO layer 15 serving as a charge accumulating insulating layer are provided in the memory cell region, where element isolation grooves 6 for these memory cell transistors are narrow and shallow. Two types of transistors, one for high voltage and the other for low voltage, having gate insulating layers 16 or 17, which are different from the ONO layer 15 in the memory cell region, are provided in the peripheral circuit region, where at least element isolation grooves 23 for high voltage transistors are wide and deep. In this way, it is possible to improve the degree of integration and yield in the memory cell region, and secure withstand voltage in the peripheral circuit region.
    • 提出了具有存储单元区域和外围电路区域的半导体存储器件以及制造这种半导体存储器件的方法,其中沟槽形成在存储单元区域中较浅以提高产量, 并且在周边电路区域的高电压晶体管区域,特别是在其高压晶体管区域中形成深沟槽,以便提高元件隔离耐受电压。 在存储单元区域中设置有多个具有作为电荷累积绝缘层的ONO层15的存储单元晶体管,其中用于这些存储单元晶体管的元件隔离槽6窄而浅。 在外围电路区域中设置两个类型的晶体管,一个用于高电压,另一个用于低电压,具有与存储单元区域中的ONO层15不同的栅极绝缘层16或17,其中至少元件 用于高压晶体管的隔离槽23宽而深。 以这种方式,可以提高存储单元区域的集成度和产量,并且确保外围电路区域中的耐受电压。