Integrated optical devices

Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making electrical device

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310344, G03C 500, H01L 4104

Patent

active

061564834

ABSTRACT:
In a method of manufacturing an integrated optical device using a wafer of lithium niobate, an optical waveguide is formed in the wafer by diffusing from a surface thereof a metal such as titanium, nickel or zinc and which changes the refractive index of the lithium niobate. A chemical vapor deposition process is used to deposit on the wafer surface a silicon dioxide buffer layer, the process being operated with the temperature of the wafer substantially in the region of about 170.degree. C. to 225.degree. C. A metallic electrode array is deposited on the silicon dioxide buffer layer, and then the wafer is mounted in a package, with suitable optic and electric connections being made thereto. The package is hermetically sealed to protect the connected wafer from the environment.

REFERENCES:
patent: 4119363 (1978-10-01), Camlibel
patent: 5068865 (1991-11-01), Ohshima et al.
patent: 5925973 (1999-07-01), Eda et al.

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