Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Physical dimension specified
Patent
1996-09-12
1999-04-20
Kiliman, Leszek
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Physical dimension specified
428336, 428611, 428636, 428655, 428656, 428661, 428663, 428668, 428678, 428694TS, 428694TP, 428694TM, 428900, 427128, 427131, 2041922, 20429801, 20429825, G11B 566
Patent
active
058957120
ABSTRACT:
The coercivity of a magnetic recording medium is increased without any substantial change in magnetic remanence by depositing a fresh non-magnetic sub-underlayer on an underlayer or composite underlayer comprising a plurality of sub-underlayers, and immediately depositing a magnetic layer on the fresh sub-underlayer. In an embodiment of the present invention, a fresh chromium sub-underlayer having a thickness of about 55 .ANG. to about 135 .ANG. is sputter deposited on a chromium underlayer in the magnetic layer deposition chamber, and a cobalt magnetic layer deposited on and within 1.2 seconds after depositing the fresh sub-underlayer.
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"A New Laser Texturing Technique for High Prformance Magnetic Disk Drives," P. Baumgart et al., IEEE Trans. Mtg., proceedings of Feb., 1995.
Chen Ga-Lane
Chen Qixu
Kiliman Leszek
Seagate Technology Inc.
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