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2018 4th IEEE International Conference on Emerging Electronics (ICEE)最新文献

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Incident Flux Based Monte Carlo Simulation of Silicon and GaAs FETs in Quasi-Ballistic regime 准弹道状态下基于入射通量的硅和砷化镓场效应管的蒙特卡罗模拟
Pub Date : 2018-12-01 DOI: 10.1109/icee44586.2018.8937921
D. Singh, A. Dasgupta, A. Agarwal, Y. Chauhan
An incident flux based Monte Carlo particle simulation methodology has been developed which can be used to simulate any MOSFET. Incident flux Monte Carlo is a robust and intuitive method of device simulation because it can mimic the carrier transport in a physical device. The complete implementation has been done in an open source programming language called PYTHON. The simulations results are in good agreement with the existing results in the industry. The usability and advantage of our program have been shown by estimating backscattering coefficient, ballistic ratio and channel resistance of Silicon and GaAs quasi-ballistic devices. All the results that we have obtained can be used for better modeling of the electrical behavior of a quasi-ballistic device.
本文提出了一种基于入射通量的蒙特卡罗粒子模拟方法,该方法可用于模拟任何MOSFET。入射通量蒙特卡罗法可以模拟物理器件中的载流子输运,是一种鲁棒且直观的器件仿真方法。完整的实现是在一种名为PYTHON的开源编程语言中完成的。仿真结果与工业上已有的结果吻合较好。通过对硅和砷化镓准弹道器件的后向散射系数、弹道比和通道电阻的估计,证明了该方案的实用性和优越性。所得结果可用于更好地模拟准弹道器件的电学行为。
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引用次数: 0
Micro Electrolithography System Development 微电光刻系统开发
Pub Date : 2018-12-01 DOI: 10.1109/icee44586.2018.8937922
Sumit Kumar, E. Abraham, S. Talukder, Praveen Kumar, R. Pratap
The recently developed technique of micro-nano pattern drawing by electrolithography process necessitates controlled probe-tip movement on a predefined path. Here we report development of a specific micropositioner system for drawing patterns at micrometer scale. Effect of different parameters on the patterns is studied. Probe-tip velocity and tip force are found to have major impact on the pattern-dimension.
近年来发展起来的微纳电制模技术需要在预先设定的路径上控制探针尖端的运动。在这里,我们报告了一个特定的微定位系统的发展,以绘制图案在微米尺度。研究了不同参数对图案的影响。探针尖端速度和尖端力对图案尺寸有重要影响。
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引用次数: 1
Simultaneous generation of laser sources in S, C and L bands through four-wave mixing of electro-optic frequency combs 通过电光频率梳的四波混频,同时产生S、C、L波段的激光源
Pub Date : 2018-12-01 DOI: 10.1109/icee44586.2018.8937877
B. Vikram, Roopa Prakash, K. Nagarjun, S. Selvaraja, V. Supradeepa
Increasing bandwidth demands necessitate the use of several carriers in wavelength division multiplexing. Conventionally, carrier wavelengths were generated by individual lasers which suffer from large area and power requirements with scaling of number of carriers. We demonstrate simultaneous generation of over 316 wavelengths in S, C and L bands from two lasers spaced 4 nm apart in the C-band. Electro-optic modulators initially scale each laser to 9 lines (in 20 dB bandwidth). The electro-optic frequency combs are power scaled to $sim 800$ mW and undergo cascaded four-wave mixing in highly nonlinear fiber to generate wavelengths in the three bands. The number of lines in 20 dB bandwidth in S, C and L bands are 88, 160 and 68 respectively. This system can also be used for RF arbitrary waveform generation.
不断增长的带宽需求要求在波分复用中使用多个载波。传统上,载流子波长是由单个激光器产生的,随着载流子数量的增加,这些激光器的面积和功率要求也很大。我们演示了在S, C和L波段同时产生超过316个波长的两个激光器,在C波段间隔4 nm。电光调制器最初将每个激光缩放到9行(20db带宽)。电光频率梳的功率缩放到800兆瓦,并在高度非线性光纤中进行级联四波混频以产生三个波段的波长。S、C、L频段20 dB带宽的线路数分别为88条、160条和68条。该系统也可用于射频任意波形的生成。
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引用次数: 0
Demonstration of Charge Trap Flash Bit-Cell in 180nm CMOS Logic Foundry 电荷阱闪存位元在180nm CMOS逻辑晶圆厂的演示
Pub Date : 2018-12-01 DOI: 10.1109/icee44586.2018.8937900
S. Sadana, M. Gupta, R. Shankar, S. Singla, H. S. Jatana, U. Ganguly
Embedded non-volatile memory demand has increased manifolds in the recent time because it offers increased functionality and security for the systems. Microcontrollers, secure microprocessor need both advanced logic and NVM on the same die. Flash memory is the most mature memory used as Multi-Time Programmable Non-Volatile Memory (NVM). Traditionally Floating gate flash memory is the most commonly used flash technology where the charge is stored on the conducting floating gate. Floating gate memory is difficult to integrate in the logic process due to complex process integration and need 8-9 extra masks in the logic process to integrate flash technology. In this paper, we demonstrate Si3 N44 Charge Trap Flash (CTF) technology in 180nm CMOS fab. CTF is relatively easy to integrate and require few masks. The initial results show millisecond Program/Erase(P/E) speed, memory window of more than 1V after 1000 cycles and excellent retention with no bit flip after $250^{circ}mathrm{C}$ bake for 6 hours.
嵌入式非易失性存储器的需求在最近增加了,因为它为系统提供了更多的功能和安全性。微控制器,安全微处理器需要先进的逻辑和NVM在同一个芯片上。闪存是目前最成熟的多时间可编程非易失性存储器(NVM)。传统的浮栅闪存是最常用的闪存技术,其电荷存储在导电浮栅上。浮门存储器由于过程集成复杂,在逻辑过程中难以集成,需要在逻辑过程中额外增加8-9个掩模来集成闪存技术。在本文中,我们在180nm CMOS晶圆厂中演示了si3n44电荷阱闪蒸(CTF)技术。CTF相对容易集成,并且需要很少的掩模。初步结果表明,程序/擦除(P/E)速度为毫秒级,在1000个周期后内存窗口大于1V,并且在$250^{circ} maththrm {C}$烘烤6小时后保持良好,无位翻转。
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引用次数: 0
An Analytical Approach to Model the Effects of Diffusion in Space-Charge-Limited Current in Organic Semiconductor Films 一种模拟有机半导体薄膜中空间电荷限制电流中扩散效应的解析方法
Pub Date : 2018-12-01 DOI: 10.1109/icee44586.2018.8937967
S. M. H. Rizvi, B. Mazhari
This paper presents a simple methodology to incorporate the effects of diffusion into conventional space-charge-limited current (SCLC) of a zero built-in potential device. The resultant model is simple and a comparison between theoretical and experimental results are satisfactory.
本文提出了一种将扩散效应纳入零内置电位器件的常规空间电荷限制电流(SCLC)的简单方法。所得模型简单,理论与实验结果比较令人满意。
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引用次数: 0
SEU Sensitivity of a 14-nm SOI FinFET eDRAM Cell under Heavy-ion Irradiation 重离子辐照下14nm SOI FinFET eDRAM电池的SEU灵敏度
Pub Date : 2018-12-01 DOI: 10.1109/icee44586.2018.8937969
K. Aditya, Rohit Saini, Manoj Kumar, Ramendra Singh, A. Dixit
In this paper, we have evaluated the single event upset (SEU) sensitivity of an embedded-DRAM (eDRAM) in presence of heavy-ion irradiation using 3-D TCAD simulations. The eDRAM with an access time of $sim 1$ ns is simulated using a calibrated 10.2 fF deep trench (DT) capacitor appended to a 14nm SOI-FinFET using mixed mode TCAD simulations. We have evaluated the impact of direction and position of the incident heavy-ion with linear energy transfer (LET) of 10 MeV-cm2/mg on the calibrated 14nm SOI-FinFET. The worst-case direction and position of heavy-ion are then used for evaluation of the SEU performance of eDRAM under heavy-ion irradiation. Our analysis is the first of its kind in analyzing the effect of heavy-ion irradiation on SEU sensitivity of eDRAM. We report that the critical LET for SEU to occur in the eDRAM is 500 MeV-cm2/mg which is 5 times better than the critical LET reported for SRAMs.
在本文中,我们利用三维TCAD模拟评估了重离子辐照下嵌入式dram (eDRAM)的单事件扰动(SEU)灵敏度。使用附加在14nm SOI-FinFET上的校准10.2 fF深沟槽(DT)电容器,使用混合模式TCAD模拟了访问时间为$ $ sim 1$ ns的eDRAM。我们评估了10 MeV-cm2/mg线性能量转移(LET)的重离子入射方向和位置对校准的14nm SOI-FinFET的影响。然后利用重离子的最差方向和位置来评价eDRAM在重离子辐照下的SEU性能。我们的分析是首次分析重离子辐照对eDRAM的SEU敏感性的影响。我们报告说,eDRAM中SEU发生的临界LET为500 MeV-cm2/mg,比sram报告的临界LET好5倍。
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引用次数: 0
Thermoelectric Properties of CrI3 Monolayer CrI3单层膜的热电性能
Pub Date : 2018-12-01 DOI: 10.1109/icee44586.2018.8937910
Shalini Tomar, P. Rastogi, B. Bhadoria, S. Bhowmick, A. Agarwal, Y. Chauhan
The promising thermoelectric properties of two-dimensional (2D) materials, owing to their appropriate combination of electrical and thermal transport properties has broaden their application in thermoelectric devices. Recently, the successful exfoliation of monolayer chromium tri-iodide CrI3, having robust intrinsic magnetism, has motivated us to investigate its thermoelectric properties in ferromagnetic (FM) and anti-ferromagnetic (AFM) states. Using density functional theory in addition with Boltzmann transport theory, we have calculated the band-structure, density of states, electrical and thermal conductivities, Seebeck coefficient and power factor for monolayer CrI3 in FM and AFM states. We show that in both magnetic states, CrI3 has an electrical conductivity $(sigma /tau approx 10^{19}, Omega^{-1}m^{-1}s^{-1})$ comparable to graphene. For both magnetic states, no variation is observed in electrical and thermal conductivity for temperature less than 500 K. However, both conductivities is observed to increase significantly with further increase in temperature till 800 K. Interestingly, both conductivities in FM state are 10 times higher than AFM state, while the power factor for FM state is higher over AFM state, and hence indicates a good thermoelectric performance in FM state of CrI3 monolayer.
二维(2D)材料的热电特性由于其适当的电输运和热输运的结合而在热电器件中得到了广泛的应用。最近,单层三碘化铬CrI3的成功剥离,具有强大的内在磁性,促使我们研究其在铁磁(FM)和反铁磁(AFM)状态下的热电性能。利用密度泛函理论和玻尔兹曼输运理论,计算了单层CrI3在FM态和AFM态下的能带结构、态密度、电导率和导热系数、塞贝克系数和功率因数。我们表明,在两种磁性状态下,CrI3具有与石墨烯相当的导电性$(sigma /tau approx 10^{19}, Omega^{-1}m^{-1}s^{-1})$。对于这两种磁性状态,在低于500 K的温度下,电导率和导热率没有变化。然而,观察到两种电导率随着温度的进一步升高而显著增加,直到800 K。有趣的是,FM态的两种电导率均比AFM态高10倍,而FM态的功率因数高于AFM态,因此表明FM态的CrI3单层具有良好的热电性能。
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引用次数: 1
SIMS characterization of TiN diffusion barrier layer on steel substrate 钢基体上TiN扩散阻挡层的SIMS表征
Pub Date : 2018-12-01 DOI: 10.1109/icee44586.2018.8937939
Pankaj Kumar, Jithin M. Arvind, S. Mohan, S. Avasthi
Here we report experimentally determined diffusivity of Fe in TiN diffusion barrier layer. TiN films were deposited on mild steel substrates at room temperature. The samples were annealed at high temperatures in view of processes requiring high temperature such as GaAs thin film solar cells. SIMS was used to extract the diffusion coefficient for bulk diffusion and grain boundary diffusion. At 700°C, the effective diffusion coefficient was found to be 1.7 nm2/sec.
本文报道了铁在TiN扩散势垒层中的扩散率。在室温下将TiN薄膜沉积在低碳钢衬底上。考虑到砷化镓薄膜太阳能电池等需要高温的工艺,对样品进行了高温退火。采用SIMS法分别提取体扩散和晶界扩散的扩散系数。在700℃时,有效扩散系数为1.7 nm2/sec。
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引用次数: 0
Tuning the band structure of nickel oxide for efficient hole extraction in perovskite solar cells 钙钛矿太阳能电池中镍氧化物能带结构的优化
Pub Date : 2018-12-01 DOI: 10.1109/icee44586.2018.8937888
R. Yadav, Suren Patwardhan, Ranjana J. Shourie, M. Aslam, Balasubramaniam Kavaipatti, D. Kabra, A. Antony
Inorganic materials for the charge transport layer in solar cells are increasingly being investigated. Non-stoichiometric nickel oxide (NiOX), owing to its larger band gap and stability is a promising hole transport material. In this work, we critically examine the electronic structure and hole-selectivity of NiOX films at various oxygen partial pressure (pO2) values during radio frequency (RF) sputtering. At pO2 of 0.25, a maximum in the Ni3+/Ni2+ ratio (7.09) is obtained. At this ratio, the band alignment of NiOX with that of methyl-ammonium lead iodide (MAPI) is observed to be most suitable. There is no misalignment of the valence band edges while conduction band edges separated by about 1 eV. Initial results of the MAPI perovskite solar cell with this optimized NiOX as hole transport layer showed 7.7% efficiency. This result is promising to take the work further for enhancement of efficiency as well as for in-depth engineering of the energy bands of NiOX.
无机材料作为太阳能电池中电荷传输层的研究日益深入。非化学计量型氧化镍(NiOX)具有较大的带隙和稳定性,是一种很有前途的空穴输运材料。在这项工作中,我们严格检查了在射频(RF)溅射过程中不同氧分压(pO2)值下NiOX薄膜的电子结构和空穴选择性。在pO2为0.25时,Ni3+/Ni2+的比值达到最大值(7.09)。在此比例下,NiOX与甲基碘化铅铵(MAPI)的能带排列最为合适。当导带边缘相距约1ev时,价带边缘没有错位。以优化后的NiOX为空穴传输层的MAPI钙钛矿太阳能电池的初始效率为7.7%。这一结果有望进一步提高效率,并为NiOX的能带的深入工程提供帮助。
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引用次数: 1
Compact Modeling of Drain Current in Double Gate Negative Capacitance MFIS Transistor 双栅负电容MFIS晶体管漏极电流的紧凑建模
Pub Date : 2018-12-01 DOI: 10.1109/icee44586.2018.8937923
A. Gaidhane, G. Pahwa, A. Verma, Y. Chauhan
A surface potential based compact model for a long channel MFIS (Metal-Ferroelectric-Insulator-Semiconductor) type Double Gate Negative Capacitance transistor (DG-NCFET) is presented in this paper. We propose an explicit continuous formulation of the drain current in terms of an intermediate parameter which is solved using a compact modeling approach. The proposed model captures a wide range of ferroelectric material parameter variations of a DG-NCFET in the non-hysteretic regime of operation. We implement our compact model in Verilog-A code and validate extensively with TCAD simulation results. We test the transient capability of the proposed model by simulating NCFET based 15-stage ring oscillator in a commercial circuit simulator.
提出了一种基于表面电位的长通道MFIS(金属-铁电-绝缘体-半导体)型双栅负电容晶体管(DG-NCFET)的紧凑模型。我们提出了一个用中间参数表示漏极电流的显式连续公式,该公式使用紧凑的建模方法求解。所提出的模型捕获了DG-NCFET在非滞后运行状态下的大范围铁电材料参数变化。我们在Verilog-A代码中实现了我们的紧凑模型,并用TCAD仿真结果进行了广泛的验证。我们通过在商用电路模拟器中模拟基于NCFET的15级环形振荡器来测试所提出模型的瞬态能力。
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引用次数: 4
期刊
2018 4th IEEE International Conference on Emerging Electronics (ICEE)
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