Characterizing edge profiles of photomask structures with complementary information from SEM and AFM
Characterizing edge profiles of photomask structures with complementary information from SEM and AFM
复制标题
利用 SEM 和 AFM 的补充信息表征光掩模结构的边缘轮廓
DOI:
10.1117/12.2014417
复制
发表时间:
2013
期刊:
影响因子:
--
通讯作者:
Dorothee Hüser
中科院分区:
文献类型:
--
作者:
Wolfgang Häßler-Grohne;Dorothee Hüser
The demand for growing precision of shrinking structures on photolithographic masks makes fast, reliable, and robust testing tools necessary. Scanning electron microscopes (SEM) therefore are standard metrology tools for critical dimension (CD) measurements. An algorithm that is independent of `a priory knowledge of material parameters of the nanostructure is employed to determine CD. The analysis procedure is optimized in particular for fast scanning and small current probing beams to measure line structures on photolithographic masks. The edge characterization with SEM has been complemented with AFM measurements. In particular, the width of the edge transition estimated from height and slope of AFM topography information has been compared to that obtained from SEM scans. Height and slope are unidirectional parameters, so their determination does not need tip deconvolution. To characterize corner roundings the convolution process has to be understood. Therefore, simulations of physical processes of atomic force microscopy have been carried out to understand the influence of force gradients on the probing process causing a double convolution of tip and sample geometry, firstly of the geometries directly and secondly because of the changing interaction due to changing geometries. The analysis method to estimate edge parameters from SEM images works stable for line widths down to 50 nm. A long term stability down to ±0.6 nm has been observed.
登录
查看更多内容
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
C. G. Frase;W. Häßler;E. Buhr;K. Hahm;H. Bosse
通讯作者:
H. Bosse
DOI:
--
发表时间:
2008
期刊:
European Mask and Lithography Conference
影响因子:
--
作者:
W. Häßler;C. G. Frase;D. Gnieser;H. Bosse;J. Richter;A. Wiswesser
通讯作者:
A. Wiswesser
DOI:
--
发表时间:
2008
期刊:
SPIE Advanced Lithography
影响因子:
--
作者:
Maki Tanaka;J. Meessen;Chie Shishido;Kenji Watanabe;Ingrid Minnaert;P. Vanoppen
通讯作者:
P. Vanoppen
DOI:
--
发表时间:
2004
期刊:
SPIE Advanced Lithography
影响因子:
--
作者:
W. Haessler;T. Dziomba;C. G. Frase;H. Bosse;J. Prochazka
通讯作者:
J. Prochazka