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    • 6. 发明授权
    • Apparatus and method for testing ferroelectric memories
    • 用于测试铁电存储器的装置和方法
    • US06658608B1
    • 2003-12-02
    • US09400210
    • 1999-09-21
    • David A. KampGary F. Derbenwick
    • David A. KampGary F. Derbenwick
    • G11C2900
    • G11C29/028G11C11/22G11C29/50
    • A ferroelectric integrated circuit memory device includes: a plurality of memory cells, each including a ferroelectric material, a plurality of conducting lines, each connected to or connectable to a selected one of the memory cells; a drive circuit for applying a predetermined voltage for a predetermined time to a selected one of the conducting lines, the predetermined voltage and time being the normal voltage and time required to perform write or read functions to the memory cell, a function selected from the group of: writing a logic state to the selected memory cell, and reading the selected memory cell; and a mode control circuit responsive to an external signal for adjusting the predetermined voltage or the predetermined time to perform an operation selected from the group consisting of: a partial read of the selected memory cell, and a partial write of the selected memory cell; and applying ferroelectric stress to the memory cell. A known logic state is written to the memory cells, the cells are heated, and then read to provide output data indicative of the likelihood of premature failure for each of the memory cells. Ferroelectric stress is applied to the cells either before or after the cells are written to by repeatedly applying a voltage to the cells corresponding to a logic state opposite that of the written logic state.
    • 铁电集成电路存储器件包括:多个存储单元,每个存储单元包括铁电材料,多个导线,每个导体线连接到或连接到选定的一个存储单元; 驱动电路,用于将预定电压预定时间施加到所选择的导线中,所述预定电压和时间是对所述存储单元执行写或读功能所需的正常电压和时间,从所述组中选择的功能 将逻辑状态写入所选存储单元,并读取所选存储单元; 以及模式控制电路,其响应于外部信号用于调整所述预定电压或所述预定时间以执行从由以下组成的组中选择的操作:所选择的存储器单元的部分读取和所选存储单元的部分写入; 并向存储单元施加铁电应力。 将已知的逻辑状态写入存储器单元,单元被加热,然后读取以提供指示每个存储器单元的过早故障的可能性的输出数据。 通过对与逻辑状态相反的逻辑状态相对应的单元反复施加电压,在单元被写入之前或之后对电池施加铁电应力。
    • 7. 发明授权
    • Encapsulated ferroelectric array
    • 封装铁电阵列
    • US07053433B1
    • 2006-05-30
    • US10135488
    • 2002-04-29
    • Gary F. Derbenwick
    • Gary F. Derbenwick
    • H01L27/108
    • H01L27/1159H01L27/11502H01L27/11585
    • A ferroelectric layer within an array of ferroelectric FETs is encapsulated between a bottom barrier dielectric layer and a top barrier dielectric layer extending beyond the ferroelectric layer. The ferroelectric FETs are formed on first conductivity type silicon, each having two second conductivity type silicon regions within the first conductivity type silicon separated by some distance. The two second conductivity type silicon regions forming a source and a drain with a channel region therebetween. A silicon dioxide layer is formed on the channel region, a bottom barrier dielectric layer is formed on the silicon dioxide layer, a ferroelectric layer is formed on the bottom barrier dielectric layer, a top barrier dielectric layer is formed on the ferroelectric layer, and an electrode layer is formed on the ferroelectric layer.
    • 铁电FET阵列内的铁电层被封装在底部阻挡介电层和延伸超出铁电层的顶部阻挡介电层之间。 铁电FET形成在第一导电型硅上,每个第一导电类型的硅在第一导电类型硅内部具有两个第二导电类型的硅区域,分隔一定距离。 两个第二导电类型的硅区域形成在其间具有沟道区域的源极和漏极。 在沟道区上形成二氧化硅层,在二氧化硅层上形成底部阻挡介电层,在底部阻挡介电层上形成铁电体层,在铁电体层上形成顶部阻挡介电层, 在铁电体层上形成电极层。