Methods for Making Data Storage Media and the Resultant Media

Abstract

Methods for forming data storage media and the media formed thereby are disclosed herein. In one embodiment, the method for forming a data storage media, comprises: injection molding a substrate comprising surface features, wherein said surface features have greater than about 90% of a surface feature replication of an original master; and disposing a data layer over at least one surface of said substrate; wherein said data storage media has an axial displacement peak of less than about 500μ under shock or vibration excitation when excited by a 1 G sinusoidal loading.

1 . A method for forming a data storage media, comprising:
 injection molding a substrate comprising a plastic surface and a preformed core, wherein the plastic surface comprises surface features, wherein said surface features have greater than about 90% of a surface feature replication of an original master; and   disposing a data layer over at least one surface of said substrate;   wherein said data storage media has an axial displacement peak of less than about 500μ under shock or vibration excitation when excited by a 1 G sinusoidal loading;   wherein the storage medium has a thickness of up to about 1.2 mm.   
     
     
         2 . The method of  claim 1 , wherein said core comprises a material selected from the group consisting of metal, glass, ceramic, metal-matrix composite, and alloys and combinations comprising at least one of the foregoing materials. 
     
     
         3 . The method of  claim 2 , wherein said material comprises aluminum. 
     
     
         4 . The method of  claim 1 , wherein said core further comprises a varied thickness. 
     
     
         5 . The method of  claim 1 , wherein said core further comprises a cross-sectional geometry selected from the group consisting of concave, convex, tapered, and combinations comprising at least one of the foregoing core geometries. 
     
     
         6 . The method of  claim 1 , wherein said core further comprises a core outer diameter substantially equal to a substrate outer diameter. 
     
     
         7 . The method of  claim 1 , wherein said core further comprises a geometry selected from the group consisting of a radial arm, a ring, star-like, and combinations comprising at least one of the foregoing geometries. 
     
     
         8 . The method of  claim 1 , wherein said core further comprises at least one hollow cavity. 
     
     
         9 . The method of  claim 1 , wherein said core further comprises at least one filled cavity. 
     
     
         10 . The method of  claim 9 , wherein said filled cavity comprises a material selected from the group consisting of glass, foams, carbon, metals, ceramics, thermoplastics, thermosets, rubbers, others and composites, alloys, and combinations comprising at least one of the foregoing materials. 
     
     
         11 . The method of  claim 1 , further comprising reinforcing said substrate with a material selected from the group consisting of glass, foams, carbon, metals, ceramics, thermoplastics, thermosets, rubbers, and composites, alloys, and combinations comprising at least one of the foregoing materials. 
     
     
         12 . The method of  claim 1 , wherein said data layer has a coercivity of greater than about 1,500 oersted. 
     
     
         13 . The method of  claim 12 , wherein said coercivity is greater than about 3,000 oersted. 
     
     
         14 . The method of  claim 1 , wherein the plastic surface comprises a thermoplastic. 
     
     
         15 . The method of  claim 1 , wherein the plastic surface comprises a thermoset. 
     
     
         16 . The method of  claim 1 , wherein the thickness is about 0.8 mm to about 1.2 mm. 
     
     
         17 . The method of  claim 1 , wherein the plastic surface is disposed around the preformed core. 
     
     
         18 . A method for forming a data storage medium, comprising:
 injection molding a substrate comprising a plastic surface and a preformed core, wherein the plastic surface comprises surface features, wherein said surface features have greater than about 90% of a surface feature replication of an original master;   disposing a data layer over at least one surface of said substrate; and   disposing a thermoset coating on the substrate, wherein the data layer is located between the thermoset coating and the substrate;   wherein said data storage medium has an axial displacement peak of less than about 500μ under shock or vibration excitation when excited by a 1 G sinusoidal loading; and   wherein the storage medium has a thickness of up to about 1.2 mm.