Process for making a magnetic data storage element

Abstract

Abstract A PROCESS FOR MAKING A MAGNETIC MATERIAL IN THE FORM OF A FILM ON A CONDUCTIVE CYLINDRICAL SUBSTRATE COMPRISES APPLYING AN ALTERNATING CURRENT TO THE SUBSTRATE TO GENERATE AN ALTERNATING ORIENTING MAGNETIC FIELD CIRCUMFERENTIALLY ABOUT THE SUBSTRATE. THE ORIENTING MAGNETIC FIELD STRENGTH IS ADJUSTED TO PRODUCE AN ISOTROPIC MAGNETIC LAYER ON THE SUBSTRATE OR AT HIGHER INTENSITIES PRODUCES FILMS WITH CIRCIMFERENTIALLY CLOSED EASY AXIS. THE ALTERNATING CURRENT IS APPLIED CONCURRENTLY WITH DEPOSITION OF FERROMAGNETIC BATH SOLUTION. IN AN ELECTROLES DEPOSITION SYSTEM AND THE ELECTROLYTIC SYSTEM, A DIRECT CURRENT APPLIED TO ELECTROPLATE OR TO INITIATE AND SUSTAIN DEPOSITION IS ISOLATED FROM THE ALTERNATING ORIENTING FIELD ENERGIZATION. THE ALTERNATING ORIENTING CURRENT MAY BE SINUSOIDAL BUT IS PREFERABLY A SQUARE WAVE AND HAS A ZERO D-C COMPONENT.

Inventors

• 👤 Lynn C Liebschutz

Bibliographic Details