Proceedings ArticleDOI
Monitoring processes in photoresist using infrared optical fibers and tunable diode lasers
I. Schnitzer,Abraham Katzir,U. Schiessl,Harald Boettner,Maurus Tacke +4 more
- Vol. 1228, pp 246-255
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TLDR
In this paper, a novel approach for the problem of in-situ and real-time monitoring processes in thin photoresists is presented, based on the fact that all the essential processing steps, such as softbaking, exposure, hardbaking and development, can be monitored by the induced spectral modifications in the infrared spectrum of the resist film.Abstract:
A novel approach for the problem of in-situ and real time monitoring processes in thin film
photoresists is presented. The approach is based on the fact that all the essential
processing steps, such as softbaking, exposure, hardbaking, and development, can be
monitored by the induced spectral modifications in the infrared spectrum of the resist film.
The technique of fiber-optic-based evanescent field spectroscopy, is proposed as the method
for measuring these spectral changes. The technique is demonstrated using a silver halide
infrared transmitting optical fiber coated with thin photoresist film, as the sensing
element, and a tunable lead salt diode laser, as the infrared monochromatic source. As an
example, immense changes in the resist IR spectrum, induced by thermolysis, are measured.
The advantages of using all-fiber technology for remote real time sensing is further
discussed, and the possibility to monitor the resist film temperature and thickness, using
the same silver halide fibers, is emphasized.read more
Citations
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Journal ArticleDOI
Infrared Optical Fiber Sensors
TL;DR: In this paper, the progress of infrared optical fiber sensors is reviewed with particular interest in thermometry and spectroscopy, and the advantages and disadvantages of infrared fibers must be considered carefully in the development of fiber sensors.
Proceedings ArticleDOI
Research and development on silver halide fibers at Tel Aviv University
F. Moser,N. Barkay,A. Levite,Eli Margalit,Idan Paiss,Amir Sa'ar,I. Schnitzer,Albert Zur,Abraham Katzir +8 more
TL;DR: In this article, the authors present a survey of current work at Tel Aviv University on properties and applications of silver and halide infrared transmitting fibers, which can be repetitivelybent on a 5 cm radius without degrading the transmission, up to thousands of bends.
Proceedings ArticleDOI
Remote spectroscopy using mid-IR fiber-coupled laboratory apparatus
TL;DR: Instrument accessories for remote infrared spectroscopy have been developed employing chalcogenide fiber as mentioned in this paper, which can acquire spectral signatures between 3400 cm-1 and 850 cm1 for quantitative analysis of a wide variety of solutions, mixtures, sludge, mud, creams, and gels, including biological samples.