计量型紫外显微镜微纳米线宽测量技术是利用光电倍增管的光电转换效应,将线宽的光学信号转换为电信号,并利用后续信号采样处理电路,提取出线宽的轮廓信号。利用激光干涉仪等精密定位装置,搭建了一套线宽测量系统,对线宽标称值为3 μm的标准样板进行测量,得到的线宽测量值为3.025 μm,与标称值仅相差25 nm。实验表明:该方法可以准确地获取线宽的边界信号,实现线宽的准确测量。
Abstract
The micro-nano linewidth measurement technology on metrological ultraviolet microscope is that photovoltaic effect of photomultiplier tubes is used to convert the optical signal to electric signal and extract the outline of linewidth by the subsequent signal acquisition circuit. Using some precision positioning device,such as laser interferometer, a linewidth measurement system is builded to measure a standard sample which the linewidth is 3 μm. The linewidth measurement result is 3.025 μm, differ with nominal value 25 μm. Experiment shows that the method can accurately obtain the border of the linewidth , it can achieve accurate measurement of linewidth.
关键词
计量学 /
微纳米线宽测量 /
计量型紫外显微镜 /
光电倍增管
Key words
metrology /
micro-nano linewidth measurement /
metrological utraviolet microscope /
photomultiplier tubes
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参考文献
[1]Li Q, Gao S T, Li W, et al. Critical Dimensional linewidth calibration using UV microscope and laser interferometry[C]//Proceeding of SPIE, Sixth International Symposium on Precision Mechanical Measurements, Guiyang, China, 2013.891635:1-10.
[2]Bodermann B, Buhr E, Ehret G, et al. Optical metrology of micro-and nanostructures at PTB: status and
future developments[C]//Ninth International Symposium on Laser Metrology. International Society for Optics and Photonics, Berlin,Germany, 2008. 7155, 12.
[3]Scholze F, Tümmler J, Ulm G. High-accuracy radiometry in the EUV range at the PTB soft X-ray radiometry beamline[J]. Metrologia, 2003,40(1): S224-S228 .
[4]徐毅,高思田,李晶.纳米、亚微米标准样板及SPM量值溯源[J]. 计量学报, 2003, 24(2):81-84.
[5]康华光.电子技术基础[M]. 北京:高等教育出版社, 2000.
[6]赵杰,曹凡,李翔宇.微弱电流测量电路的设计和仿真[J].电子技术,2009, 36(12):39-41.
[7]刘卫东,刘延冰,刘建国.检测微弱光信号的PIN光电检测电路的设计[J]. 电测与仪表,1999, 36(4):28-30.
[8]何瑾,刘铁根,孟卓.弱光强信号检测系统前级放大电路的设计[J].科学技术与工程,2007,9(7),1904-1906.
[9]刘鹏民,莫德举,洪峰.T型反馈电阻网络在微弱信号放大电路中的应用[J].电测与仪表, 1999, 36(408):31-32.
[10]王月娥. 微电流测量方法的研究[D]. 西安:西安理工大学,2005.
[11]佘乾顺,微弱电流检测系统的设计与实现[D].西安:西北师范大学,2009.
基金
国家科技部支撑计划(2011BAK15B01;2011BAK15B02)