Substrate manufacturing method, substrate manufactured by the substrate manufacturing method and magnetic recording medium using the substrate

A nano imprint method of manufacturing a substrate with a surface portion having concave and convex configurations, the method comprising the steps of:

• preparing a base member for the substrate and a mold, with a solution being applied therebetween, said mold having a surface in a shape corresponding to the concave and convex configurations of the substrate, said solution comprising a solvent and a constructional material for forming the surface portion, the constructional material being dissolved in the solvent;
• drying and removing the solvent in a state that the solution is applied between the base member and the mold, thereby forming the surface portion composed of the constructional material on the base member, the surface portion carrying transferred concave and convex configurations;
• and
• releasing the mold from the surface portion formed on the base member after drying and removing the solvent,
• wherein a material of a contact portion of the mold to be contacted with the solution and a material for the solvent and the constructional material, respectively, are selected for chargeability and releasability such that a contact angle of the contact portion of the mold with respect to the solvent is smaller than 90 degrees and a work of adhesion between the contact portion of the mold and the constructional material is smaller than a work of adhesion between the contact portion of the mold and the solvent,
• wherein the contact portion of the mold comprises a resin, the solvent comprises an organic solvent, and the constructional material comprises a silicon compound,
• wherein the resin is at least one selected from a group of acrylic, cellulosic, polycarbonate, polyolefin and polystyrene resin, and the solvent is at least one selected from a group of ketone and ether, and
• wherein the solution is deposited on the base member and pressed by the mold.

A nano imprint method of manufacturing a substrate with a surface portion having concave and convex configurations, the method comprising the steps of:

• preparing a base member for the substrate and a mold, with a solution being applied therebetween, said mold having a surface in a shape corresponding to the concave and convex configurations of the substrate, said solution comprising a solvent and a constructional material for forming the surface portion, the constructional material being dissolved in the solvent;
• drying and removing the solvent in a state that the solution is applied between the base member and the mold, thereby forming the surface portion composed of the constructional material on the base member, the surface portion carrying transferred concave and convex configurations;
• and
• releasing the mold from the surface portion formed on the base member after drying and removing the solvent,
• wherein a material of a contact portion of the mold to be contacted with the solution and a material for the solvent and the constructional material, respectively, are selected for chargeability and releasability such that a contact angle of the contact portion of the mold with respect to the solvent is smaller than 90 degrees and a work of adhesion between the contact portion of the mold and the constructional material is smaller than a work of adhesion between the contact portion of the mold and the solvent,
• wherein the contact portion of the mold comprises a resin, the solvent comprises an organic solvent, and the constructional material comprises a silicon compound,
• wherein the resin is at least one selected from a group of acrylic, cellulosic, polycarbonate, polyolefin and polystyrene resin, and the solvent is at least one selected from a group of ketone and ether, and
• wherein the surface portion composed of the constructional material is removed from the mold without using a parting agent.