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    • 1. 发明授权
    • Method of detecting shallow trench isolation corner thinning by electrical trapping
    • 通过电捕获检测浅沟槽隔离角变薄的方法
    • US06784682B1
    • 2004-08-31
    • US10113259
    • 2002-03-28
    • Tien-Chun YangNian YangHyeon-Seag Kim
    • Tien-Chun YangNian YangHyeon-Seag Kim
    • G01R3126
    • G01R31/2648
    • A method and apparatus for testing semiconductors comprising shallow trench isolation (STI) edge structures. An edge intensive shallow trench isolation structure (500) is coupled to a voltage source (310) and a current profile is recorded. A planar structure (600) on the same wafer is coupled to a voltage source and a current profile is recorded. A comparison of current profiles obtained for the two types of structures may indicate the presence and/or extent of STI corner effects. More specifically, a steeper slope for a normalized current versus time plot for an STI edge intensive structure (500) compared to a slope of a normalized plot of a planar structure (600) is indicative of an increased rate of electron trapping in STI corners, which may indicate that the STI corners are too thin. In this novel manner, STI corner thickness is observed in a non-destructive, electrical test process, resulting in higher quality and greater reliability of semiconductors using STI processes.
    • 一种用于测试包括浅沟槽隔离(STI)边缘结构的半导体的方法和装置。 边缘密集的浅沟槽隔离结构(500)耦合到电压源(310)并且记录电流分布。 在同一晶片上的平面结构(600)耦合到电压源并且记录电流分布。 对于两种类型的结构获得的当前轮廓的比较可以指示STI拐角效应的存在和/或程度。 更具体地,与平面结构(600)的归一化图的斜率相比,用于STI边缘密集结构(500)的归一化电流对时间图的更陡峭的斜率表示STI拐角中的电子捕获速率增加, 这可能表明STI拐角太薄。 以这种新颖的方式,在非破坏性电气测试过程中观察到STI拐角厚度,从而导致使用STI工艺的半导体的更高的质量和更高的可靠性。
    • 4. 发明授权
    • Method of detecting shallow trench isolation corner thinning by electrical stress
    • 通过电应力检测浅沟槽隔离角变薄的方法
    • US06734028B1
    • 2004-05-11
    • US10113152
    • 2002-03-28
    • Tien-Chun YangNian YangHyeon-Seag Kim
    • Tien-Chun YangNian YangHyeon-Seag Kim
    • H01L2166
    • H01L22/34G01R31/275G01R31/2831
    • A method and apparatus for testing semiconductors comprising shallow trench isolation (STI) edge structures. An edge intensive shallow trench isolation structure (500) is coupled to a voltage source (310) and a current versus voltage profile is recorded. A planar structure (600) on the same wafer is coupled to a voltage source and a current versus voltage profile is recorded. An electrical stress is applied to both structures. Additional current profiles of each structure are obtained after the electrical stress. A comparison of difference current profiles obtained for the two types of structures may indicate the presence and/or the extent of STI corner effects. More specifically, a value for a normalized gate current difference for an STI edge intensive structure (500) greater than normalized gate current difference of a planar structure (600) is indicative of an increased rate of electron trapping in STI corners, which may indicate that the STI corners are too thin. In this novel manner, STI corner thickness may be observed in a non-destructive, electrical test process, resulting in higher quality and greater reliability of semiconductors using STI processes.
    • 一种用于测试包括浅沟槽隔离(STI)边缘结构的半导体的方法和装置。 边缘密集的浅沟槽隔离结构(500)耦合到电压源(310),并记录电流对电压曲线。 在同一晶片上的平面结构(600)被耦合到电压源并且记录电流对电压曲线。 对两个结构都施加电应力。 在电应力之后,获得每个结构的附加电流分布。 对于两种类型的结构获得的差异电流曲线的比较可以指示STI拐角效应的存在和/或程度。 更具体地,大于平面结构(600)的归一化栅极电流差的STI边缘强化结构(500)的归一化栅极电流差的值表示STI拐角中的电子捕获速率增加,这可以指示 STI角落太薄了。 以这种新颖的方式,可以在非破坏性电气测试过程中观察到STI拐角厚度,从而导致使用STI工艺的半导体的更高质量和更高的可靠性。
    • 9. 发明授权
    • Test structure for measuring effect of trench isolation on oxide in a memory device
    • 沟槽隔离对存储器件中氧化物的影响的测试结构
    • US06859748B1
    • 2005-02-22
    • US10190420
    • 2002-07-03
    • Nian YangZhigang WangTien-Chun Yang
    • Nian YangZhigang WangTien-Chun Yang
    • H01L23/544G01R27/29G01S31/00
    • H01L22/34
    • An apparatus for measuring effects of isolation processes (280) on an oxide layer (286) in a memory device (255) is described. In one embodiment, the apparatus comprises a structure (110) comprised of an array (110c) of memory devices (255). A testing unit (120) is coupled with the structure (110). The testing unit (120) is for performing various electrical tests on the array (110c) of memory devices (255). The testing unit (120) is also for providing data regarding each memory device (255) in the array (110c) of memory devices (255). An analyzer (120) is coupled with the structure (110) for analyzing results of the various electrical tests. This determines the condition of the oxide layer (286) of each memory device (255) in the array of memory devices (110c).
    • 描述了用于测量隔离过程(280)对存储器件(255)中的氧化物层(286)的影响的装置。 在一个实施例中,该装置包括由存储器件(255)的阵列(110c)组成的结构(110)。 测试单元(120)与结构(110)耦合。 测试单元(120)用于在存储器件(255)的阵列(110c)上执行各种电测试。 测试单元(120)还用于提供关于存储器件(255)的阵列(110c)中的每个存储器件(255)的数据。 分析器(120)与结构(110)耦合,用于分析各种电气测试的结果。 这决定了存储器件阵列(110c)中每个存储器件(255)的氧化物层(286)的状态。