薄膜晶体管技术-刘玉荣
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氧化锌薄膜晶体管电性能的温度特性王聪;刘玉荣【摘要】ZnO-based Thin Film Transistors (ZnO-TFTs) were fabricated by Radio Frequency (RF) magnetron sputtering successfully, and the temperature dependence and influence mechanism of the electrical characteristics of ZnO-TFTs are investigated. With the increase of the test temperature in the temperature range from 27℃to 210℃, the on/off current ratio and the threshold voltage of the ZnO-TFT decrease significantly, and the subthreshold swing increases obviously, and the carrier mobility increases firstly and then decreases gradually. The change of electrical properties is mainly due to the combination effect of the increase of carrier concentration, the generation of point defects, and the enhancement of interface scattering in the channel active layer caused by the temperature increase. In addition, when the device is instantaneously cooled to the initial temperature, there is a hysteresis in the electrical characteristics. The main reason is that the recombination process need take a long time to reach the initial state for the generated point defects and interstitial oxygen atoms in the active layer caused by high temperature on the heating stage.%采用射频磁控溅射法成功制备了ZnO薄膜晶体管(ZnO-TFT),研究了ZnO-TFT电学性能的温度依赖性及其影响机理。
室温下溅射法制备高迁移率氧化锌薄膜晶体管刘玉荣;黄荷;刘杰【摘要】为降低氧化锌薄膜晶体管(ZnO TFT)的工作电压,提高迁移率,采用磁控溅射法在氧化铟锡(ITO)导电玻璃基底上室温下依次沉积NbLaO栅介质层和ZnO半导体有源层,制备出ZnO TFT,对器件的电特性进行了表征.该ZnO TFT呈现出优异的器件性能:当栅电压为5 V、漏源电压为10 V时,器件的饱和漏电流高达2.2 mA;有效场效应饱和迁移率高达107 cm2/(V?s),是目前所报道的室温下溅射法制备ZnO TFT的最高值,亚阈值摆幅为0.28 V/decade,开关电流比大于107.利用原子力显微镜(AFM)对NbLaO和ZnO薄膜的表面形貌进行了分析,分析了器件的低频噪声特性,对器件呈现高迁移率、低亚阈值摆幅以及迟滞现象的机理进行了讨论.%In order to reduce the operating voltage and increase the carrier mobility in zinc oxide thin-film transistor ( ZnO TFT) , ZnO TFTs with high-k NbLaO as gate dielectric layer were fabrica-ted on indium tin oxide/glass substrate by radio-frequency magnetron sputtering at room tempera-ture, and the electrical properties of the device were characterized. The fabricated ZnO TFTs exhibit excellent device performances. The saturation drain current can reach to 2. 2 mA at gate voltage of 5 V and drain voltage of 10 V. The saturation mobility increases drastically up to 107 cm2/( V?s) , which is one of the highest field-effect mobility values achieved in ZnO-based TFTs by room-temper-ature sputtering. The subthreshold swing and on-off current ratio are 0. 28 V/decade and higher than 107 , respectively. The relative mechanisms of high mobility, small subthreshold voltage swing and hysteresis phenomenon are discussed by analyzing the atomforce microscope images of the NbLaO dielectric and ZnO active-layer film, and the low frequency noise behavior of the device.【期刊名称】《发光学报》【年(卷),期】2017(038)007【总页数】6页(P917-922)【关键词】薄膜晶体管;氧化锌;磁控溅射;高迁移率【作者】刘玉荣;黄荷;刘杰【作者单位】华南理工大学电子与信息学院, 广东广州 510640;华南理工大学广东省短距离无线探测与通信重点实验室, 广东广州 510640;华南理工大学电子与信息学院, 广东广州 510640;华南理工大学电子与信息学院, 广东广州 510640【正文语种】中文【中图分类】TN321+.5;O472+.4目前,用于有源驱动平板显示器的薄膜晶体管(TFT)的半导体材料普遍为多晶硅和氢化非晶硅[1-2]。
专利名称:一种新型薄膜晶体管专利类型:实用新型专利
发明人:葛泳,刘玉成,朱涛,袁波申请号:CN201420744668.2申请日:20141201
公开号:CN204204862U
公开日:
20150311
专利内容由知识产权出版社提供
摘要:本实用新型公开了一种新型薄膜晶体管,包括衬底,在所述衬底上方设置的半导体层、栅极绝缘层、源/漏电极层和栅极层,所述源/漏电极层中的源极和漏极分别与所述半导体层电接触连接,所述栅极层包括栅极走线层和分别与所述栅极走线层电接触连接的第一栅极和第二栅极,所述第一栅极和所述第二栅极设置在所述栅极绝缘层上,所述第一栅极和所述第二栅极之间通过第三栅极电连接,所述第三栅极(4)设置在所述栅极绝缘层上方且在所述衬底(11)上的投影与所述半导体层(8)的投影全部或部分重叠,其具有较低的关态电流和较高的开态电流。
申请人:昆山工研院新型平板显示技术中心有限公司,昆山国显光电有限公司
地址:215300 江苏省苏州市昆山市开发区光电产业园富春江路320号
国籍:CN
代理机构:北京三聚阳光知识产权代理有限公司
代理人:彭秀丽
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