Methods of manufacturing arrays of thin magnetic elements and arrays produced by the methods |
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| 申请号 | US3662357D | 申请日 | 1970-03-30 | 公开(公告)号 | US3662357A | 公开(公告)日 | 1972-05-09 |
| 申请人 | POST OFFICE; | 发明人 | ENOCH REGINALD DAVID; | ||||
| 摘要 | This specification describes a method of manufacturing an array of data storage elements from thin sheet material, each element having at least one perforation for data entry and read-out conductors, in which a sheet of the magnetic material with the perforations for the elements is annealed whilst a magnetic field is applied across the sheet thereby to form lines of easy magnetization around the perforations and material is then removed from the sheet to form the separate storage elements. Examples of suitable magnetic materials include binary and ternary alloys of iron, nickel and cobalt. | ||||||
| 权利要求 | 2. A method according to claim 1, in which annealing the material includes cooling from a temperature above the Curie point of the material. 3. A method according to claim 1, in which the annealing of the material is carried out isothermally at a temperature below the Curie point of the material. 4. A method according to claim 1, in which the thin sheet of magnetic material is secured to an insulating non-magnetic substrate having perforations aligned with those in the magnetic material. 5. A method according to claim 1 including the formation of electrical conductor means passing through the perforations. 6. A data store including an array of elements manufactured by a method according to claim 5 with conductor means through the perforations in said elements for performing data entry and read out functions. 7. A store according to claim 6, in which the material of the thin sheet includes at least two of iron, cobalt and nickel. 8. A store according to claim 6 in which each element includes a respective perforation. 9. A store according to claim 8, in which the perforations are circular and the elements are in the form of annuli. |
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