Stock material or miscellaneous articles – All metal or with adjacent metals – Having magnetic properties – or preformed fiber orientation...
Patent
1994-12-01
1997-05-20
Resan, Stevan A.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having magnetic properties, or preformed fiber orientation...
428668, 428457, 428694T, 428694TS, 428900, 428928, 148313, 420435, 420436, 420439, G11B 566
Patent
active
056310943
ABSTRACT:
A new magnetic alloy exhibits high Hc and Ms while exhibiting excellent corrosion resistance, thereby providing ideal physical properties for high density recording applications. Other parameters of the media, such as SNR, PW50, and S are at least maintained, if not also improved. The alloy contains cobalt and up to 10 at. % Ni, up to 20 at. % Pt, up to 10 at. % Ta, up to 10 at. % Ti, and optionally up to 6 at. % B. The ratio of the tantalum to titanium in the alloy is between 3:1 and 1:3. The alloy is deposited by vacuum deposition (typically sputtering) on a similarly deposited non-magnetic Ni alloy under layer. Nitrogen and/or oxygen may be introduced into the alloy during deposition to improve SNR. Other corrosion-resistant thin film alloys may also be obtained by the inclusion of Ta and Ti.
REFERENCES:
patent: 4411963 (1983-10-01), Aine
patent: 4503125 (1985-03-01), Nelson et al.
patent: 4749459 (1988-06-01), Yamashita et al.
patent: 4786553 (1988-11-01), Shiroishi et al.
patent: 4786564 (1988-11-01), Chen et al.
patent: 4789598 (1988-12-01), Howard et al.
patent: 4792497 (1988-12-01), Suzuki et al.
patent: 4837094 (1989-06-01), Kudo
patent: 4898774 (1990-02-01), Yamashita et al.
patent: 4950548 (1990-08-01), Furusawa et al.
patent: 4988578 (1991-01-01), Yamashita et al.
patent: 5004652 (1991-04-01), Lal et al.
patent: 5024903 (1991-06-01), Mizukami
patent: 5045165 (1991-09-01), Yamashita
patent: 5049451 (1991-09-01), Lal et al.
patent: 5112669 (1992-05-01), Yoden et al.
patent: 5162158 (1992-11-01), Christner et al.
patent: 5180640 (1993-01-01), Yamashita et al.
patent: 5282946 (1994-02-01), Kinoshita et al.
Williams and Comstock, "An Analytical Model of the Write Process in Digital Magnetic Recording", 17th Annual AIP Conf. Proc., Part I, No. 5, 1971, pp. 738-742.
Zhu et al., "Micromagnetic Studies of Thin Metallic Films", Journal of Applied Physics, vol. 63, No. 8, 1988, p. 3248.
Chen et al., "Physical Origin of Limits in the Performance of Thin-Film Longitudinal Recording Media", IEEE Trans. Mag., vol. 24, No. 6, 1988. p. 2700.
Maeda, H., "Effects of Nitrogen on the High Coercivity and Microstructures of Co-Ni Alloy Films", Journal of Applied Physics, vol. 53, No. 10, 1982, pp. 6941-6945.
Murdock et al., "Roeamap to 10 Gb/in.sup.2 Media: Challenges", IEEE Trans. Mag., 1992, p. 3078.
Opfer et al., "Thin Film Memory Disk Development", Hewlett Packard Journal, Nov., 1985, pp. 4-10.
Aboaf et al., "Magnetic Properties and Structure of Co-Pt Thin Film", IEEE Trans. Mag., MAG-19, No. 4, 1983, p. 1514.
Johnson et al., "Composition Effects on Recording Properties of CoPtCr Thin Film Media", IEEE Trans. Mag., MAG-29, No. 6, 1993, p. 3670.
King, "Datapoint Thin Film Media", IEEE Trans. Mag., MAG-17, No. 6, Jul. 1981, pp. 1376-1379.
Chen John K.-J.
Chen Tu
Ranjan Rajiv Y.
Yamashita Tsutomu T.
Komag Incorporated
Resan Stevan A.
Small Jonathan A.
LandOfFree
Magnetic alloy for improved corrosion resistance and magnetic pe 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 alloy for improved corrosion resistance and magnetic pe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic alloy for improved corrosion resistance and magnetic pe will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1722797