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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 35, Iss. 25 — Sep. 1, 1996
  • pp: 5067–5072

Optical and mechanical characterization of evaporated SiO2 layers. Long-term evolution

K. Scherer, L. Nouvelot, P. Lacan, and R. Bosmans  »View Author Affiliations


Applied Optics, Vol. 35, Issue 25, pp. 5067-5072 (1996)
http://dx.doi.org/10.1364/AO.35.005067


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Abstract

Numerous characterizations were performed on 120-nm thick evaporated SiO2 layers in order to understand how their features change as a function of deposition conditions and time. Density decreases with increasing deposition pressure. It governs all the layer properties (refractive index, hardness, and stress). In situ stress measurements show that stress can be divided into intrinsic and water-induced components, respectively linked to local density (outside the pores) and porosity. Intrinsic stress increase with decreasing pressure is explained by a diminution of the Si-O-Si bond angle (IR measurements). Long-term evolution is characterized by stress relaxation related to Si-O-Si strained bond hydrolysis.

© 1996 Optical Society of America

History
Original Manuscript: November 20, 1995
Revised Manuscript: February 16, 1996
Published: September 1, 1996

Citation
K. Scherer, L. Nouvelot, P. Lacan, and R. Bosmans, "Optical and mechanical characterization of evaporated SiO2 layers. Long-term evolution," Appl. Opt. 35, 5067-5072 (1996)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-35-25-5067

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