Passive bubble generator

Details Passive bubble generator Passive bubble generator

1979-08-01

1981-06-16

Pianalto, Bernard D.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427127, 427132, B05D 314

Patent

active

042738016

ABSTRACT:
The present invention is a method and apparatus for passive generation of magnetic bubbles in thin layers of magnetic materials, such as garnets, and uses specially designed permalloy elements which with the rotation of an in-plane magnetic field act to generate magnetic bubbles over a wide range of bias magnetic field values. The design of a special permalloy element includes an angular portion and a contiguous remaining portion having a large surface area relative to the angular portion. Pulsing of the in-plane rotating field to higher field values as it passes through a predetermined orientation with respect to the angular portion generates magnetic bubbles in a controllable manner for fixed values of the bias field.

REFERENCES:
patent: 3530446 (1970-09-01), Perneski
IBM Tech. Dis. Bull., Feb. 1972, 2559-2560, vol. 14, No. 9, Chang.

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