Static information storage and retrieval – Magnetic bubbles – Detectors
Patent
1991-11-27
1992-08-25
Popek, Joseph A.
Static information storage and retrieval
Magnetic bubbles
Detectors
365 27, 365 37, G11C 1114
Patent
active
051424916
ABSTRACT:
Disclosed is an improved magnetic bubble recording device for optically effecting writing, reading and erasure of information with respect to magnetic bubbles. The magnetic bubble recording device has a basic structure in which a first magnetic film for forming a magnetic bubble therein and a second magnetic film for imparting a bias magnetic field to the first magnetic film to stably hold the maganetic bubble in the first magnetic film are provided on a substrate on which is formed a transfer pattern for transferring a magnetic bubble along the transfer pattern, thereby providing a portable magnetic bubble recording device at low cost and with a simple structure. In addition, an alignment pattern for aligning the device with a light beam applied to the device is formed on the device, thereby permitting accurate writing and reading. The peripheral edge portion of the pattern of a transfer channel has a surface inclined with respect to the substrate surface so as to transfer the magnetic bubble favorably. Further, a device is provided in which a first transfer channel includes a plurality of transfer channels that do not intersect each other and a second transfer channel that intersects the transfer channels constituting the first transfer channel, formed so as to effect optical reading and writing smoothly and at high speed.
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Canon Kabushiki Kaisha
Popek Joseph A.
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