Real-time control by multiwavelength ellipsometry of plasma-deposited multilayers on glass by use of an incoherent-reflection model

被引:19
作者
Kildemo, M [1 ]
Bulkin, P [1 ]
Drevillon, B [1 ]
Hunderi, O [1 ]
机构
[1] NORWEGIAN UNIV SCI & TECHNOL,DEPT PHYS,N-7034 TRONDHEIM,NORWAY
来源
APPLIED OPTICS | 1997年 / 36卷 / 25期
关键词
real-time control; ellipsometry; optical coatings; incoherent reflection; TRANSPARENT THIN-FILMS; SPECTROSCOPIC ELLIPSOMETRY; OPTICAL FUNCTIONS; GROWTH; SEMICONDUCTORS;
D O I
10.1364/AO.36.006352
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Real-time control by multiwavelength phase-modulated ellipsometry (PME) of the growth of multilayer structures deposited on transparent glass is presented. The structures consist of plasma-deposited SiO2 and SiNx stacks. A model that takes into account incoherent reflection in the substrate is described and tested. A generalized feedback control method that incorporates the incoherent modeling of the transparent substrate is further applied to the growth of a Fabry-Perot and a standard quarter-wave filter, The resulting optical coatings characterized by spectroscopic PME and transmission measurements show a reproducible precision, with less than 1% error between target and measured spectral responses. (C) 1997 Optical Society of America.
引用
收藏
页码:6352 / 6359
页数:8
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