| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic recording medium having good characteristics suitable for high-density recording and having a high output from a low range to high range by forming a lower magnetic film in such a manner that columns in the lower magnetic film are grown oblique to the base to show a curved line which is convex over the straight line connecting the starting point and the end point of the column. SOLUTION: For example, a PET film 3 is travelled in the direction (A) in the figure at 2.0m/min velocity, while electron beams are emitted from 10-KW electron gun 8 to heat, melt and vaporize a magnetic metal (Co) in a crucible 4 to form a lower magnetic film 11a to 700Åthickness on the PET film 3 when the film is in the position on a cooling can roll 1. The columns in the magnetic film 11a are grown oblique to the base and show a curved line which is convex from the straight line connecting the starting point and the ending point of the column (with the angleθ1 =30 deg.). During the lower magnetic film 11a is formed, oxygen gas is supplied by 50 sccm rate in the direction from the upstream side to the downstream side from an oxygen gas supply nozzle 7.
|
