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Aligning Evaporated Striplines on Thin Films

IP.com Disclosure Number: IPCOM000096496D
Original Publication Date: 1963-Jun-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Keefe, G: AUTHOR

Abstract

The procedure is used to provide a visual indication on a substrate for indicating the axis of magnetization of thin film elements deposited on it. This indication serves as an accurate reference to orient conductive striplines to be positioned over the thin film elements in accurate relationship with respect to the easy axis of magnetization of them.

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Aligning Evaporated Striplines on Thin Films

The procedure is used to provide a visual indication on a substrate for indicating the axis of magnetization of thin film elements deposited on it. This indication serves as an accurate reference to orient conductive striplines to be positioned over the thin film elements in accurate relationship with respect to the easy axis of magnetization of them.

Initially, the thin film element is deposited onto a substrate and a coating of a light sensitive material, e. g., KPR*, is placed on the opposite surface, The substrate is positioned face downwardly onto the *KPR is a trademark of Eastman Kodak Co. sample holder of, e. g., a Kerr magneto-optical device. The thin film element is subjected to a 60-cycle magnetic field so as to determine the precise orientation of the easy axis of the film. A light source defining an elongated rectangular pattern is normally positioned with respect to the field generating coils of the Kerr device. The rectangular pattern of light can be used in the ascertaining of the orientation of the easy axis of the film.

The time required to ascertain the easy axis of the magnetic film is less than the exposure time of the light sensitive material. Accordingly, when the magnetic film is properly orientated with respect to the field generating coils, the rectangular pattern of light is directed parallel to the easy axis and reflected from the bottom surface of the magnetic film so as to impinge upon the...