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Planar processing for magnetic bubble devices

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1 Author(s)
Rose, D. ; Hewlett-Packard Co., Palo Alto, California

A two-mask level, conductor first thin film process is described for fabrication of magnetic bubble devices. The process permits a stepless permalloy level over a conductor that may be two to three times as thick as conventional processing The planar process is attained by anodizing a thick aluminum alloy film in all regions where no conductor is needed. The process described solves problems in conventional processing caused by thin conductor metalization and permalloy step coverage. Replication, nucleation, and annihilation devices made with this process promise superior performance.

Published in:

Magnetics, IEEE Transactions on  (Volume:12 ,  Issue: 6 )