Method of producing magnetic bubble domain devices |
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| 申请号 | US3726049D | 申请日 | 1971-09-30 | 公开(公告)号 | US3726049A | 公开(公告)日 | 1973-04-10 |
| 申请人 | BELL CANADA NORTHERN ELECTRIC; | 发明人 | LUCAS J; | ||||
| 摘要 | Surface layers of platelets of magnetic bubble domain material are polished while the platelet is subjected to a magnetic field. Considerably lower value magnetic fields are used, compared with conventional methods in which the platelets are exposed to high value magnetic field after polishing. | ||||||
| 权利要求 | 1. A method of producing magnetic bubble domain devices, comprising the steps of positioning a platelet of magnetic bubble domain material in a magnetic field of desired polarity normal to the platelet surfaces, and polishing a surface of the platelet while the platelet is exposed to the magnetic field. 2. A method as claimed in claim 1, the magnetic field of a value sufficient to produce a desired domain configuration in the core layer of the platelet prior to polishing said surface. 3. A method as claimed in claim 2, the magnetic field of a value sufficient to produce a single domain in the core layer. 4. A method as claimed in claim 1, both surfaces of the platelet being polished while the platelet is exposed to the magnetic field, to produce magnetization of the surface layers of the same direction. 5. A method as claimed in claim 1, one surface of the platelet polished while the platelet is exposed to a magnetic field of a first direction, the other surface of the platelet polished while the platelet is exposed to a magnetic field of a second direction opposite to the first direction, relative to said platelet whereby the surface layers are magnetized in opposed directions. 6. A method as claimed in claim 2, the magnetic field of a value of the order of 100 Oersteds. |
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