检索结果-南通市图书馆

Positive gate bias stress-induced hump-effect in elevated-metal metal-oxide thin film transistors

Chinese Physics B 2017年第12期26卷 587-590页

作者：齐栋宇张冬利王明湘 Department of Microelectronics Soochow University Suzhou 215006 China

Under the action of a positive gate bias stress, a hump in the subthreshold region of the transfer characteristic is observed for the amorphous indium-gallium-zinc oxide thin film transistor, which adopts an elevated-metal metal-oxide structure. As stress time goes by, both the on-state current and the hump shift towards the negative gate-voltage direction. The humps occur at almost the same current levels for devices with different channel widths, which is attributed to the parasitic transistors located at the channel width edges. Therefore, we propose that the positive charges trapped at the back-channel interface cause the negative shift, and the origin of the hump is considered as being due to more positive charges trapped at the edges along the channel width direction. On the other hand, the hump-effect becomes more significant in a short channel device （L=2 μm）. It is proposed that the diffusion of oxygen vacancies takes place from the high concentration source/drain region to the intrinsic channel region.

关键词： amorphous indium-gallium-zinc oxide thin film transistors positive bias stress hump

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

hump nosed viper bite in Sri Lanka-descriptive observational study of 1543 cases

引用

Asian Pacific Journal of Tropical Medicine 2010年第11期3卷 902-905页

作者： Wijewantha HS Sellahewa KH National Hospital of Sri Lanka Colombo 10Sri Lanka

Objective:To identify the clinical manifestations of hump nosed viper envenomation and to recognize the available treatment methods to prevent ***:Descriptive observational study involving a series of 1 543 patients admitted with hump nosed viper bite to 5 major hospitals in Sri Lanka was *** collection was done consecutively during February 1990 and February *** Hypnale,identification of the biting snake was made by the corresponding author after visual examination of the dead or live snakes,which were brought to ***:Sixty seven(4.34%) patients developed systemic effects and two (0.1%) patients died due to effects of envenomation or complications of *** effects varied from coagulopathy,nephropathy to some neurological *** nine (3.8%) patients had only coagulopathy and they received either,intravenous isotonic saline to ensure adequate urine out put i.e.0.5 mL/kg /hour or 15 mL/kg of fresh frozen plasma(FFP). None of the patients that had coagulopathy developed renal *** of the sample by mildly venomous species of Hypnale may have contributed to the low incidence of systemic ***:It is likely that early hydration with normal saline or FFP can prevent acute renal *** showed a tendency for early correction of *** of FFP in hump nosed viper envenomation is worth studying in randomized double blind controlled clinical trials.

关键词： Snake bites hump nosed viper Clinical manifestations Prevention of complications Fresh frozen plasma

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

How the camel got his hump

引用

新世纪智能 2019年第15期 21-24页

作者： Rudyard Kipling 不详

现在我来讲第二个故事:骆驼背上的驼峰是怎么长出来的。世界刚诞生的时候,一切的一切都是崭新的,动物们刚刚开始为人干活儿。然而,在荒凉的沙漠中有一头骆驼,它什么活儿也不想干,时不时叫喊几声。它每天吃枯枝、红柳、乳草和荆棘,整日... 详细信息

现在我来讲第二个故事:骆驼背上的驼峰是怎么长出来的。世界刚诞生的时候,一切的一切都是崭新的,动物们刚刚开始为人干活儿。然而,在荒凉的沙漠中有一头骆驼,它什么活儿也不想干,时不时叫喊几声。它每天吃枯枝、红柳、乳草和荆棘,整日无所事事地闲逛。如果有人跟它说话,它用鼻子'哼'一声就不再言语了。星期一的早晨,马来找它。马的背上驮着鞍子,嘴上戴着嚼子,它对骆驼说:'骆驼啊骆驼,来和我们一起忙碌奔跑吧.'骆驼不屑地'哼'了一声。于是马走了,把这件事告诉了人。狗来找它。狗的嘴里叼着一根手杖,对路驼说:'骆驼啊骆驼,来和我们一起送取物品吧.'

关键词： How the camel got his hump 吉卜林

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The chest X ray in pulmonary embolism: Westermark sign, Hampton's hump and Palla's sign. What's the difference?

引用

Journal of Acute Disease 2018年第3期7卷 99-102页

作者： Tan Si Hong Shawn Lim Xin Yan Fatimah Lateef Dukes-NUS Graduate Medical School and Yong Loo Lin School of Medicine National University of Singapore DirectorSinghealth Duke NUS Institute of Medical SimulationSingapore Department of Emergency Medicine Singapore General Hospital Singapore

Pulmonary embolism (PE), with the incidence of about 60 per 100000 annually, can be a life-threatening disease if it is not treated promptly. It has been estimated that some 10% of PE patients die within the first hour of the event. Untreated PE has a mortality of about 30%. PE is a condition that is treatable if suspected and diagnosed early. The chest radiograph is still the first investigation that is ordered in patients presenting with cardiorespiratory symptoms or symptoms suggestive of PE. The CXR is also helpful in identifying or excluding other conditions or diagnoses. Thus, knowing and understanding some of the more specific CXR signs can be useful. We suggest that physicians to be aware of and utilize CXR findings such as Palla's sign, Westermark sign and Hamptons hump to help with the diagnosis of PE and to exclude other conditions that can mimic venous thrombo-embolism. Even if these signs are not common, their presence, even in an unsuspected patient without a high pretest probability of PE, should prompt further investigations such as a D-dimer test, lung scintigraphy or computed tomography pulmonary angiography as required.

关键词： Pulmonary embolism Palla's sign Hamptom's hump Westermark sign

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Degradation of the front and back channels in a deep submicron partially depleted SOI NMOSFET under off-state stress

引用

Journal of Semiconductors 2013年第7期34卷 91-96页

作者：郑齐文余学峰崔江维郭旗丛忠超张兴尧邓伟张孝富吴正新 Xinjiang Technical Institute of Physics&Chemistry Chinese Academy of Sciences Xinjiang Key Laboratory of Electric Information Materials and Devices University of Chinese Academy of Sciences

The hot-carrier effect charactenstic in a deep submicron partially depleted SOI NMOSFET is investigated. Obvious hot-carrier degradation is observed under off-state *** hot-carrier damage is supposed to be induced by the parasitic bipolar effects of a float SOI *** back channel also suffers degradation from the hot carrier in the drain depletion region as well as the front *** low gate voltage,there is a hump in the sub-threshold curve of the back gate transistor,and it does not shift in the same way as the main transistor under *** under the same condition,there is a more severe hot-carrier effect with a shorter channel transistor. The reasons for those phenomena are discussed in detail.

关键词： silicon-on-insulator hot-carrier effect hump back gate

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

p型多晶硅薄膜晶体管在动态负偏置温度应力下的退化研究

p型多晶硅薄膜晶体管在动态负偏置温度应力下的退化研究

引用

作者：周洁苏州大学

学位级别：硕士

本文主要研究了p型多晶硅薄膜晶体管（Thin Film Transistor, TFT ）在动态负偏置温度（Negative Bias Temperature, NBT）应力下的退化特性。首次观察到了器件在动态NBT应力下的两阶段退化现象。在第一阶段Vth向正向漂移,在很长一段应... 详细信息

本文主要研究了p型多晶硅薄膜晶体管（Thin Film Transistor, TFT ）在动态负偏置温度（Negative Bias Temperature, NBT）应力下的退化特性。首次观察到了器件在动态NBT应力下的两阶段退化现象。在第一阶段Vth向正向漂移,在很长一段应力时间之后Vth出现回转现象向负向漂移。本文认为动态NBT应力下的动态效应是引起Vth正向漂移主要因素。动态效应强烈的依赖于脉冲的幅度以及脉冲下降沿,幅度越高、下降沿越快动态效应的影响越明显。动态效应下氧化层中产生了大量的固定负电荷引起了器件Vth的正向漂移。在动态效应饱和后,直流负偏置温度不稳定（Negative Bias Temperature Instability, NBTI）产生的晶界缺陷态导致了Vth的负向漂移。本文提出了在动态NBT应力下的氧化层负电荷产生模型,扩散进入氧化层的水汽以及脉冲应力下降沿时在沟道与源漏之间耗尽区产生的碰撞离化效应认为是退化模型的两个关键因素。并通过SILVACO软件模拟以及验证实验对所提出的模型进行验证。此外,本文首次观察到了动态NBT应力后亚阈值区hump由产生到逐渐增大再逐步消失的过程。研究发现当动态效应主导器件的退化时,能够观察到hump现象,且随着应力幅度的减小hump出现和消失的时间延后。在高温时,与动态效应一样hump现象也受到抑制。基于本文提出的动态NBT应力下的退化模型,我们认为边缘寄生器件的存在以及其在动态NBT应力后不同时间段退化量的不同是引起亚阈值区hump产生和消失的原因。通过构建由一个中心器件和两个边缘寄生器件组合而成的器件,模拟应力后的中心器件和边缘器件的不同Vth漂移量来拟合实验器件亚阈值区的hump现象,很好的验证了动态NBT应力下的退化模型。

关键词：多晶硅薄膜晶体管负偏置温度不稳定动态效应碰撞离化 hump

来源：

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：