BLURRING EFFECT ANALYSIS OF AN X-RAY MASK FOR SYNCHROTRON-RADIATION LITHOGRAPHY

Citation
Iy. Kim et al., BLURRING EFFECT ANALYSIS OF AN X-RAY MASK FOR SYNCHROTRON-RADIATION LITHOGRAPHY, Journal of vacuum science & technology. B, Microelectronics and nanometer structures processing, measurement and phenomena, 16(4), 1998, pp. 1992-1997
Citations number
4
Categorie Soggetti
Physics, Applied","Engineering, Eletrical & Electronic
ISSN journal
10711023
Volume
16
Issue
4
Year of publication
1998
Pages
1992 - 1997
Database
ISI
SICI code
1071-1023(1998)16:4<1992:BEAOAX>2.0.ZU;2-X
Abstract
During the process of synchrotron radiation lithography, blurring occu rs largely because the mask and patterns are distorted under transient thermal loads. An analysis model of blurring has been proposed in thi s article. Irradiated energy is calculated by summing the moving x-ray power incident to a wafer. The blur is caused mainly by two sources: displacement of the pattern and pattern width change. A transient anal ysis has been made. In a sample calculation, the distortion of a print ed pattern after the process was 1.2 nm while the maximum in-plane dis tortion during the process was 3.5 nm and width change -3.5 nm for a 1 Hz scanning frequency. Comparison between distortions without conside ring blurring effect and distortions considering blurring effect was o ffered. The effect of scanning frequency on printed pattern distortion and width change was also presented. (C) 1998 American Vacuum Society .