首页   按字顺浏览 期刊浏览 卷期浏览 Nanometer‐scale resolution of calixarene negative resist in electron beam lithography
Nanometer‐scale resolution of calixarene negative resist in electron beam lithography

 

作者: J. Fujita,   Y. Ohnishi,   Y. Ochiai,   E. Nomura,   S. Matsui,  

 

期刊: Journal of Vacuum Science&Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena  (AIP Available online 1996)
卷期: Volume 14, issue 6  

页码: 4272-4276

 

ISSN:1071-1023

 

年代: 1996

 

DOI:10.1116/1.588589

 

出版商: American Vacuum Society

 

关键词: resists

 

数据来源: AIP

 

摘要:

New nonpolymer materials, calixarene derivatives were tested as high‐resolution negative resists for use in electron beam lithography. Arrays of 12‐nm‐diam dots with a 25 nm pitch were fabricated easily. The sensitivity of calixarene in terms of area dose ranged from 700 to 7000 μC/cm2, and the required dose for dot fabrication was about 105electrons/dot. The standard area dose for calixarene is almost 20 times higher than that for polymethyl methacrylate (PMMA), but the electron spot dose for dot fabrication by calixarene is almost the same as that for PMMA and other highly sensitive resists such as SAL (chemically amplified negative resist for electron beam made by Shipley). The electron spot dose for such extremely small dots does not seem to depend on standard area dose, but any resist tends to require the same dose under exposure in a 50 keV electron beam writing system. We propose a qualitative exposure model that suggests a tradeoff of dose and dot size. The calixarene seems to be promising material for nanofabrication.

 

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