Patent ID: 6183606
Filing Date: 2001-02-06
Classification: C23C,G11B,Y10S,Y10T

Abstract:
A method for producing high coercivity FePt--Si.sub.3 N.sub.4 granular composite thin film, comprising the steps of:(a) co-sputtering an FePt target and a Si.sub.3 N.sub.4 target on a substrate by use of a conventional magnetron sputtering system to form a deposited film;(b) annealing the film in a vacuum under controlled conditions for an annealing temperature and time period; and(c) quenching the film in a quenching liquid to form a post-annealed FePt--Si.sub.3 N.sub.4 granular film having magnetic properties of Ms>375 emu/cm.sup.3 and Hc>2000 Oe, respectively.