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,...http://www.google.de/patents/US4077113?utm_source=gb-gplus-sharePatent US4077113 - Method of manufacturing an electro-optical switch
