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    • 2. 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。
    • 6. 发明授权
    • Test structure apparatus for measuring standby current in flash memory devices
    • 用于测量闪存器件中待机电流的测试结构设备
    • US06593590B1
    • 2003-07-15
    • US10112976
    • 2002-03-28
    • Nian YangZhigang WangTien-Chun Yang
    • Nian YangZhigang WangTien-Chun Yang
    • H01L2906
    • H01L22/34G11C16/04G11C29/50G11C2029/5006H01L27/105
    • A flash memory microelectronic chip (1000) is formed with at least one integral test structure (100) for electrical measurement of transistor leakage current from the low voltage peripheral transistors. The invention is a very wide finger-type transistor (9, 10) with minimum channel length and a width of approximately 150,000 &mgr;m, equal to the estimated total width of the same type of periphery transistors in the chip circuit. One low voltage NMOS (9) and one low voltage PMOS finger-type transistor (10) allow monitoring of the standby current contribution from these two types of periphery transistors. Regular current or voltage tests can be applied to the test structure, thus providing information on the correlation of standby currents with single transistor off-state leakage currents.
    • 闪存微电子芯片(1000)形成有至少一个整体测试结构(100),用于电子测量来自低电压外围晶体管的晶体管漏电流。 本发明是一种非常宽的手指式晶体管(9,10),其具有最小的通道长度和大约150,000μm的宽度,等于芯片电路中相同类型的外围晶体管的估计总宽度。 一个低电压NMOS(9)和一个低电压PMOS指状晶体管(10)允许监测来自这两种类型的外围晶体管的待机电流贡献。 可以对测试结构进行常规电流或电压测试,从而提供关于待机电流与单晶体管截止状态漏电流的相关性的信息。
    • 7. 发明授权
    • Determination of dielectric constants of thin dielectric materials in a MOS (metal oxide semiconductor) stack
    • 确定MOS(金属氧化物半导体)堆叠中的薄介电材料的介电常数
    • US06486682B1
    • 2002-11-26
    • US09904736
    • 2001-07-13
    • Zhigang WangNian YangTien-Chun Yang
    • Zhigang WangNian YangTien-Chun Yang
    • H01L2358
    • H01L22/34
    • First and second dielectric constants, e1 and e2 respectively, for first and second dielectric materials forming a MOS (metal oxide semiconductor) stack are determined. First and second test MOS stacks having first and second total effective oxide thickness, EOTA and EOTB, respectively, are formed. The first and second test MOS stacks include first and second interfacial structures comprised of the second dielectric material with first and second thickness, T2A and T1A, respectively. In addition, the first and second test MOS stacks include first and second high-K structures comprised of the first dielectric material with first and second thickness, T2B and T1B, respectively. The thickness parameters EOTA, T1A, T2A, EOTB, T1B, and T2B of the test MOS stacks are measured. The dielectric constants, e1 and e2, are then determined depending on relations between values of EOTA, T1A, and T2A, and between values of EOTB, T1B, and T2B.
    • 确定形成MOS(金属氧化物半导体)堆叠的第一和第二介电材料的第一和第二介电常数e1和e2。 形成具有第一和第二总有效氧化物厚度的第一和第二测试MOS堆叠,分别为EOTA和EOTB。 第一和第二测试MOS堆叠包括分别具有第一和第二厚度的第二介电材料的第一和第二界面结构,T2A和T1A。 此外,第一和第二测试MOS堆叠包括分别由第一和第二厚度的第一介电材料构成的第一和第二高K结构,分别为T2B和T1B。 测量MOS堆叠的厚度参数EOTA,T1A,T2A,EOTB,T1B和T2B。 然后根据EOTA,T1A和T2A的值之间以及EOTB,T1B和T2B的值之间的关系确定介电​​常数e1和e2。
    • 9. 发明授权
    • Determination of effective oxide thickness of a plurality of dielectric materials in a MOS stack
    • 确定MOS堆叠中多个介电材料的有效氧化物厚度
    • US06472236B1
    • 2002-10-29
    • US09904740
    • 2001-07-13
    • Zhigang WangNian YangTien-Chun Yang
    • Zhigang WangNian YangTien-Chun Yang
    • H01L2166
    • H01L22/12
    • System and method for determining a respective effective oxide thickness for each of first and second dielectric structures that form a MOS (metal oxide semiconductor) stack. A first plurality of test MOS (metal oxide semiconductor) stacks are formed, and each test MOS stack includes a respective first dielectric structure comprised of a first dielectric material and a respective second dielectric structure comprised of a second dielectric material. A respective deposition time for forming the respective first dielectric structure corresponding to each of the first plurality of test MOS stacks is varied such that a respective first effective oxide thickness of the respective first dielectric structure varies for the first plurality of test MOS stacks. A respective second effective oxide thickness of the respective second dielectric structure is maintained to be substantially same for each of the first plurality of test MOS stacks. A respective total effective oxide thickness, EOTMOS, is measured for each of the first plurality of test MOS stacks. A first graph having total effective oxide thickness as a first axis and having deposition time for forming the first dielectric structure as a second axis is generated by plotting the respective total effective oxide thickness, EOTMOS, versus the respective deposition time for forming the respective first dielectric structure for each of the first plurality of test MOS stacks. The respective second effective oxide thickness of the respective second dielectric structure that is substantially same for each of the first plurality of test MOS stacks is determined from an intercept of the first axis of total effective oxide thickness when deposition time for forming the first dielectric structure of the second axis is substantially zero in the first graph.
    • 用于确定形成MOS(金属氧化物半导体)堆叠的第一和第二电介质结构中的每一个的相应有效氧化物厚度的系统和方法。 形成第一多个测试MOS(金属氧化物半导体)堆叠,并且每个测试MOS堆叠包括由第一电介质材料和由第二电介质材料组成的相应的第二电介质结构的相应的第一电介质结构。 形成对应于第一多个测试MOS堆叠中的每一个的相应的第一介电结构的各自的沉积时间被改变,使得相应的第一介电结构的相应的第一有效氧化物厚度对于第一多个测试MOS堆叠而言是变化的。 相应的第二介电结构的相应的第二有效氧化物厚度被保持为对于第一多个测试MOS堆叠中的每一个基本相同。 对于第一多个测试MOS堆叠中的每一个测量相应的总有效氧化物厚度EOTMOS。 通过绘制相应的总有效氧化物厚度EOTMOS,相对于形成相应的第一电介质的相应沉积时间,产生具有总有效氧化物厚度作为第一轴并具有用于形成第一电介质结构作为第二轴的沉积时间的第一图 所述第一多个测试MOS堆叠中的每一个的结构。 对于第一多个测试MOS堆叠中的每一个基本上相同的相应的第二介电结构的相应的第二有效氧化物厚度是从形成第一介电结构的沉积时间的总有效氧化物厚度的第一轴的截距来确定的 在第一图中第二轴基本为零。