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公开(公告)号:DE3261588D1
公开(公告)日:1985-01-31
申请号:DE3261588
申请日:1982-03-25
Applicant: IBM
Inventor: BRUCE CALVIN ARNOLD , HOMOLA ANDREW MARIAN , LORENZ MAX RUDOLPH
Abstract: A monolayer magnetic coating is prepared by applying magnetic particles which have an electrostatic charge in an aqueous environment to an active layer on a substrate, the active layer having an electrostatic charge in an aqueous environment opposite to the charge on the magnetic particles so that the particles bond to the active layer.A method of applying a magnetic coating to a disc substrate is disclosed comprising coating the substrate with an active coating material having an electrostatic charge in an aqueous environment to form an active layer, applying to the active coating material magnetic particles coated with colloidal silica, said silica-coated magnetic particles having an electrostatic charge thereon in an aqueous environment opposite to the charge on said active coating material, whereby the magnetic particles are electrostatically attracted to and bonded to said active material to form a magnetic layer, and applying a magnetic field to said magnetic particles to magnetically align said particles.