Dovetail propagation structure for contiguous disk bubble device

Details Dovetail propagation structure for contiguous disk bubble device Dovetail propagation structure for contiguous disk bubble device

1980-11-03

1982-08-24

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Guide structure

365 15, G11C 1908

Patent

active

043464572

ABSTRACT:
A propagation track for use in contiguous disk bubble devices consists of a plurality of spaced dovetail shaped elements which are connected at one end thereof by a track portion which faces in the direction of and is substantially perpendicular to the (1,1,2) axis. The first, third and fifth sides of the dovetail structure are elongated and also face in the direction of and are substantially perpendicular to the (1,1,2) axis. The remaining sides of the dovetail structure have different orientations, the second side facing in the direction of and being substantially perpendicular to the (2,1,1) axis, and the fourth side facing in the direction of and being substantially perpendicular to the (1,2,1) axis. The orientation of the two cusps formed by the first and second sides and the fourth and fifth sides is such that the lines bisecting and pointing toward the cusps are substantially parallel to the (1,2,1) and (2,1,1) axes, respectively.

REFERENCES:
patent: 4247912 (1981-01-01), Cullum, Jr. et al.
patent: 4276614 (1981-06-01), Nelson et al.
Journal of Vacuum Science & Technology, vol. 15, No. 5, Sep./Oct. 1928, pp. 1674-1684.
Wolfe and Nelson, "Crystal Symmetry Effects in Ion-Implanted Propagation Patterns for Magnetic Bubbles-Roof-top Designs", IEEE Trans. Magnetics, MAG 15, 1323 (1978).
C. C. Shir, "Triangular Propagation Patterns for Contiguous-disk Magnetic Bubble Devices", IBM Technical Disclosure Bulletin, vol. 23, No. 5, Oct. 1980.
Y. S. Lin, G. S. Almasi, D. B. Dove, G. E. Keefe and C. C. Shir, "Orientation Dependence of Propagation Margin of 1-.mu.m Bubble Contiguous-disk Devices", J. Appl. Phys. 50(3), Mar. 1979 , pp. 2258-2260.

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