Method of manufacturing an electro-optical switch

Details Method of manufacturing an electro-optical switch Method of manufacturing an electro-optical switch

1976-12-07

1978-03-07

DiPalma, Victor A.

Metal working

Method of mechanical manufacture

Electrical device making

29622, H01P 1100, H01Q 1300

Patent

active

040771130

ABSTRACT:
A method of manufacturing an electro-optical switch in which a metal layer is deposited on a substrate of ferroelectric material and etched to expose the substrate in the form of two channels disposed parallel over a given length. A second layer is then deposited upon the metal layer and the channels, with the diffusion into the substrate of the second layer forming two zones having optical refractive indices greater than that of the substrate. The assembly is then heated and a biasing voltage applied to create remnant electrical polarizations in opposite senses. After removal of the bias voltage, the assembly is cooled and the metal layer removed.

REFERENCES:
patent: 3208342 (1965-09-01), Nethercot, Jr.
patent: 3813142 (1974-05-01), Buhrer
patent: 3850503 (1974-11-01), Riseberg et al.
patent: 3860325 (1975-01-01), Matsushita
patent: 3883220 (1975-05-01), Taylor
patent: 3909108 (1975-09-01), Taylor
"New Directional Coupler for Integrated Optics", Auracher et al., Journal of Applied Physics, vol. 45, No. 11, 11/1974, pp. 4997-4999.

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