Process for forming underlayer for tape media
AssigneeInternational Business Machines Corporation
InventorRichard Bradshaw
Life of this patent
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Abstract
A method, according to one approach, includes forming an underlayer of a magnetic recording medium. The underlayer includes encapsulated nanoparticles each comprising a magnetic nanoparticle encapsulated by an aromatic polymer, and a polymeric binder binding the encapsulated nanoparticles. The underlayer is cured by irradiating the underlayer for causing crosslinking of the polymeric binder. In another approach, a method includes forming an underlayer of a magnetic recording medium by spray coating a mixture of a magnetic nanoparticles, aromatic polymer, and polymeric binder onto a structure as a sprayed-on aerosol coating; and curing the underlayer.
Claims19
A method, comprising:
- forming an underlayer of a magnetic recording medium, the underlayer comprising:
- encapsulated nanoparticles each comprising a magnetic nanoparticle encapsulated by an aromatic polymer, and
- a polymeric binder binding the encapsulated nanoparticles;
- and
- curing the underlayer by irradiating the underlayer for causing crosslinking of the polymeric binder;
- and
- forming a magnetic recording layer directly on the cured underlayer,
- wherein forming the underlayer includes mixing the polymeric binder with the encapsulated nanoparticles and a solvent to form a mixture;
- spray coating the mixture onto a structure as a sprayed-on aerosol coating;
- at least partially drying the sprayed-on aerosol coating;
- and radiating the at least partially dried coating for causing crosslinking of the polymeric binder to restrict further expansion or contraction in the underlayer,
- wherein the solvent includes water,
- wherein the binder is hydrophobic, and
- wherein the polymeric binder collapses onto the encapsulated nanoparticles as the solvent is removed during the drying.
A method, comprising:
- forming an underlayer of a magnetic recording medium by spray coating a mixture of a magnetic nanoparticles, aromatic polymer, and polymeric binder onto a structure as a sprayed-on aerosol coating, wherein the mixture includes a solvent comprising water and a relatively more volatile organic co-solvent;
- at least partially drying the sprayed-on aerosol coating in a manner that drives chains of the polymeric binder to uncoil and move toward a theta condition thereof;
- and
- curing the underlayer by irradiating the underlayer for causing crosslinking of the polymeric binder while the polymeric binder is in the theta condition.
A method, comprising:
- forming an underlayer of a magnetic recording medium, the underlayer comprising:
- encapsulated nanoparticles each comprising a magnetic nanoparticle encapsulated by an aromatic polymer, and
- a polymeric binder binding the encapsulated nanoparticles;
- and
- curing the underlayer by irradiating the underlayer for causing crosslinking of the polymeric binder,
- wherein forming the underlayer includes mixing the polymeric binder with the encapsulated nanoparticles and a solvent to form a mixture;
- applying the mixture onto a structure;
- at least partially drying the applied mixture;
- and radiating the at least partially dried applied mixture for causing crosslinking of the polymeric binder,
- wherein the polymeric binder collapses onto the encapsulated nanoparticles as the solvent is removed during the drying.
Dependencies are inferred from the claim text.