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Magnetic Ink Bubble Devices

IP.com Disclosure Number: IPCOM000084915D
Original Publication Date: 1976-Jan-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

DeLuca, JC: AUTHOR [+2]

Abstract

Magnetic ink can be used together with a bubble domain material for purposes such as confinement and propagation of bubble domains. Since the ink will align itself with the domains in the magnetic bubble material, a lithography can be produced which has dimensions determined by the domain dimensions and spacing. Therefore, the line width of the pattern is no longer a function of the process used to make the pattern, but instead depends on the dimensions and spacing of the domains themselves.

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Magnetic Ink Bubble Devices

Magnetic ink can be used together with a bubble domain material for purposes such as confinement and propagation of bubble domains. Since the ink will align itself with the domains in the magnetic bubble material, a lithography can be produced which has dimensions determined by the domain dimensions and spacing. Therefore, the line width of the pattern is no longer a function of the process used to make the pattern, but instead depends on the dimensions and spacing of the domains themselves.

A magnetic bubble domain stripe array can be produced by providing a pulse or sinusoidal magnetic field in combination with a magnetic bias field normal to the plane of the bubble domain layer. After the stripe bubble array has been established, magnetic ink is overlaid on an area of the sample. The parallel bubble stripe pattern will be reproduced in the ink overlay, which will be magnetically attracted to the bubble stripe array. After this, the ink is allowed to dry to establish a permanent ink stripe array having the dimensions and spacing of the original bubble domain stripe array. Even if the magnetic bias field is changed to change the bubble stripe array, the parallel ink stripes will remain.

If the magnetic bias field is decreased, domains can be nucleated in the parallel tracks determined by the magnetic ink overlay. If these domains are chopped by pulsing overlying conductor lines, a stable array of magnetic bubbles can be produced which...