Coating processes – Magnetic base or coating – Magnetic coating
Patent
1974-12-31
1976-06-29
Drummond, Douglas J.
Coating processes
Magnetic base or coating
Magnetic coating
148186, 340174TF, 427259, C04B 3500
Patent
active
039670023
ABSTRACT:
A method for making a high density magnetic bubble domain system including the functions of read, write, storage, transfer, and annihilation. Only three masking steps are required, of which only one requires critical alignment. The proces makes use of the fact that magnetic disks can be placed on non ion implanted regions without adversely affecting the propagation properties of the implanted regions. Thus, the magnetic disks can be used to define ion implantation masks as well as for providing functions such as generation, propagation, reading, and annihilation. Magnetic elements for generation, storage and propagation, reading and annihilation are deposited in the same non-critical masking step, while all condutors used for writing, reading, and transfer are deposited by a single masking step requiring critical alignment.
REFERENCES:
patent: 3728697 (1973-04-01), Heinz
patent: 3792452 (1974-02-01), Dixon et al.
patent: 3828329 (1974-08-01), Fischer et al.
patent: 3873373 (1975-03-01), Hill
patent: 3873383 (1975-03-01), Kooi
"Etching Copper Coated With Permalloy," A. Jones et al., IBM Tech. Dicl. Bull., vol. 15, No. 6, Nov. 1972, p. 2034.
Almasi George S.
Hendel Robert J.
Keefe George E.
Lin Yeong S.
McGouey Richard P.
Drummond Douglas J.
International Business Machines - Corporation
Leitten Brian J.
Stanland Jackson E.
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