| 摘要 |
888,762. Magnetic structures. INTERNATIONAL BUSINESS MACHINES CORPORATION. Nov. 18, 1959 [Nov. 18, 1958], No. 39097/59. Class 38 (2). [Also in Groups II and XXXVI] A magnetic element comprises a film of magnetic material deposited on a substrate which is provided with parallel grooves or serrations to give an easy direction of magnetization along the grooves. The magnetic material may be 80/20 nickel iron alloy and may be deposited by vapour deposition or electroplating. The substrate may be glass or plastic, or, as shown in Fig. 2, a copper sheet 2 on a phenolic board 1. The grooves are formed by an abrasive. The distances 5, 6 and 7, as shown, are 8 Á, 48 Á and 25 Á, respectively, the thickness 8 of the film being 2000-10,000 Š. |
