| 摘要 |
PURPOSE:To obtain a magnetic recording medium which has high coercive force and an excellent squareness ratio by continuous vapor deposition with good mass productivity, by forming discontinuous islandlike nonmagnetic metallic layers on a nonmagnetic substrate while moving the substrate and forming a magnetic layer on said layer. CONSTITUTION:While a substrate 2 of polyester or the like is moved from a feed roll 3 to a take-up roll 4 in a vacuum deposition vessel 1, the substrate 2 is heated by a heating lamp 7 to about 150 deg.C. A shielding plate 8 is disposed between a vapor source 5 for a nonmagnetic metal such as Bi or the like and a vapor source 6 for a magnetic metal such as Co or a Co-Ni alloy and Bi or the like is first deposited by evaporation to discontinuous island shapes 9 at 10-1,000Angstrom thickness, whereafter a magnetic metallic layer 10 of Co or the like is deposited by evaporation to 100-1,000 deg.C thickness. The substrate deposited by evaporation with Bi or the like in the above-mentioned way is deposited thereon by evaporation with the magnetic layer continuously without taking up, whereby a magnetic tape or the like of which the magnetic layer 10 has a uniform and smooth surface and which has excellent coercive force and squareness ratio is obtd. |
