Stock material or miscellaneous articles – All metal or with adjacent metals – Having magnetic properties – or preformed fiber orientation...
Patent
1994-12-21
1996-09-24
Resan, Stevan A.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having magnetic properties, or preformed fiber orientation...
428212, 428216, 428639, 428668, 428694TM, 428900, 428928, G11B 566
Patent
active
055589456
ABSTRACT:
A magnetic recording medium having excellent electromagnetic characteristics, still characteristics and cupping, decreased rust generation and high durability, includes a non-magnetic substrate and a magnetic layer formed thereon by oblique deposition, the magnetic layer being composed of at least two ferromagnetic thin films, in which the ferromagnetic thin film of the lowest layer has a saturation magnetization of 300 emu/cc or less, a coercive force of 1000 Oe or less and a thickness of 300 to 1500 .ANG., the ferromagnetic thin layer of the uppermost layer has a saturation magnetization of 300 emu/cc or more, a coercive force of 1000 Oe or more and a thickness of 400 to 1500 .ANG., an average value (.theta.) of angles between growing directions of columnar crystalline particles constituting the ferromagnetic thin film of the lowest layer and a principal plane of the substrate ranges from 50 to 70 degrees, and an average value (.theta.) of angles between growing directions of columnar crystalline particles constituting the ferromagnetic thin film of the uppermost layer and the principal plane of the substrate ranges from 30 to 50 degrees.
REFERENCES:
patent: 4770924 (1988-09-01), Takai et al.
patent: 4797330 (1989-01-01), Nasu et al.
patent: 5225234 (1993-07-01), Takai et al.
patent: 5418059 (1995-05-01), Sugita et al.
Kobayashi Koji
Miyazaki Shinji
Yoshinari Jiro
Resan Stevan A.
TDK Corporation
Yee Stephen F. K.
LandOfFree
Magnetic recording medium does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic recording medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic recording medium will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1927538