发明名称 |
Process for producing magnetic recording medium |
摘要 |
A process for producing a magnetic recording medium comprising heating a magnetic material evaporation source with at least one scanning electron beam and depositing a vapor of a magnetic material emitted from the magnetic material evaporation source onto a non-magnetic substrate tape or web which is continuously moving in a vacuum atmosphere, the magnetic material evaporation source being disposed substantially parallel to the width direction of the non-magnetic substrate tape or web to form a magnetic thin film thereon, wherein the scanning frequency of the electron beams is about 2wv/n Hz or more, in which v m/min is the moving speed of the non-magnetic substrate; w m is the scanning width of the electron beams on said magnetic material evaporation source; and n is the number of the electron beams. The magnetic thin film magnetic recording medium has improved (dB/dH)max and an excellent envelope of reproduced signals.
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申请公布号 |
US4604293(A) |
申请公布日期 |
1986.08.05 |
申请号 |
US19850788177 |
申请日期 |
1985.10.16 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
SHIRAHATA, RYUJI;YANAI, AKIO |
分类号 |
G11B5/85;(IPC1-7):G11B5/85 |
主分类号 |
G11B5/85 |
代理机构 |
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地址 |
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