Magnetic bubble memories with nonobstructing crossings between conductor and permalloy patterns
Patent 4020476 Issued on April 26, 1977. Estimated Expiration Date: April 26, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
A field-access magnetic bubble memory employs both a pattern of magnetic elements to define paths along which bubbles move in reponse to a magnetic field reorienting in the plane of bubble movement and electrical conductors which, inter alia, control bubble movement between paths. The crossings between the pattern of conductors and the pattern of magnetic elements have been found to be only negligibly disruptive of bubble movement if the conductors are carefully oriented with respect to the magnetic elements.
AI.P. Conference Proceedings, No. 18, Part I; 3M Conference, 1973, pp. 100-104
A.I.P. Conference Proceedings, Magnetism & Magnetic Materials, No. 24; 1974, pp. 641-642