Method of making a thin magnetic film storage device
Abstract
Abstract THE INVENTION RELATES TO A METHOD OF FABRICATING THIN MAGNETIC FILM STORAGE DEVICES AND MORE SPECIFICALLY TO THE MAKING OF THIN MAGNETIC FILM STORAGE DEVICES IN A MATRIX STRUCTURE WHEREIN EACH STORAGE ELEMENT HAS A CLOSED FLUX PATH. A FIRST PLURALITY OF PARALLEL CONDUCTORS IS FORMED BY DEPOSITING A CONDUCTING LAYER UPON A LAYER OF MAGNETIC FILM EARLIER DEPOSITED ON A BASE PLATE AND THE TWO ARE ETCHED INTO PARALLEL STRIPS. THIS IS FOLLOWED BY THE ELECTRODEPOSITION OF A AGNETIC FILM ABOUT THESE CONDUCTORS TO FORM A CLOSE MAGNETIC FLUX PATH ABOUT THE INDIVIDUAL STRIPS. AFTER LAYING DOWN AN INSULATING LAYER, A SECOND PLURALITY OF PARRELLEL CONDUCTORS IS ARRANGED OVER THE FIRST PLURALITY OF CONDUCTORS AND ORTHOGONAL THERETO.
Inventors
- 👤 John E Eide
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |