Dielectric multilayer, filter, manufacturing method therefor, an

Details Dielectric multilayer, filter, manufacturing method therefor, an Dielectric multilayer, filter, manufacturing method therefor, an

1991-02-12

1993-08-10

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of polyimide

385 14, 385 15, 385130, B32B 2706

Patent

active

052347729

ABSTRACT:
A dielectric multilayer filter applicable to optical communication systems is disclosed, as is a fabrication method therefor, and an optical element incorporating the same. The disclosed dielectric multilayer filter includes a fluorinated polyimide base layer with a dielectric multilayer formed thereover. According to the disclosed fabrication method, a fluorinated polyimide layer is formed by applying liquid fluorinated polyimide material over a smooth surface to a predetermined thickness followed by drying and hardening, after which a dielectric multilayer is formed over the fluorinated polyimide layer by an ion assist vapor deposition method, and then stripping the fluorinated polyimide layer away from the underlying smooth surface. The disclosed dielectric multilayer filter can be easily and economically produced at a suitably small thickness with no need for grinding, exhibits highly uniform physical and optical properties, and is exceedingly durable and resistant to curling and warping.

REFERENCES:
patent: 4790615 (1988-12-01), Seki et al.
patent: 5108201 (1992-04-01), Matsuura et al.
"Design and Evaluation of Automatic Optical Fiber Operation Support System," H. Takasugi et al., Proceedings of 39th International Wire and Cable Symposium, 1990, pp. 632-629.
"Research on thin film anticounterfeiting coatings at the National Research Council of Canada," J. A. Dobrowolski et al., Applied Optics, vol. 28, No. 14, Jul. 15, 1989, pp. 2703-2717.
Applied Optics, vol. 24, No. 4, Feb. 15, 1985, J. R. McNeil et al., "Properties of TiO2 and SiO2 thin films deposited using ion assisted deposition", pp. 486-489.
Journal of Light Wave Technology, vol. 7, No. 11, Nov. 1989, H. Yanagawa et al., "Filter-Embedded Design and Its Applications to Passive Components", pp. 1646-1653.

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