Radial Tilt Reduced Media

Abstract

In one embodiment, a storage media can comprise: a plastic substrate having a substrate composition, an optical layer having an optical layer composition different from the substrate composition, wherein the optical layer is a spin coated or injection molded; and a reflective layer disposed between the optical layer and the substrate. The storage media has a radial deviation over time of less than or equal to 1.15 degrees at a radius of 55 mm when exposed to a cycle at 25° C. of 50% relative humidity—90% relative humidity—50% relative humidity. In one embodiment, a method for making a data storage media, comprises: disposing a reflective layer on a plastic substrate, wherein the plastic layer comprises a thermoplastic, spin coating an optical layer onto the plastic substrate, wherein the optical layer comprises a thermoset, and disposing a protective layer on the substrate.

1 . A storage media, comprising: 
 a plastic substrate having a substrate composition;    an optical layer having an optical layer composition different from the substrate composition, wherein the optical layer is a spin coated or injection molded; and    a reflective layer disposed between the optical layer and the substrate;    wherein the storage media has a radial deviation over time of less than or equal to 1.15 degrees at a radius of 55 mm when exposed to a cycle at 25° C. of 50% relative humidity—90% relative humidity—50% relative humidity, and wherein the storage media is capable of storing greater than or equal to about 20 GB of data.    
     
     
         2 . The storage media of  claim 1 , wherein the substrate comprises polyarylene ether.  
     
     
         3 . The storage media of  claim 1 , wherein the substrate comprises polycarbonate.  
     
     
         4 . The storage media of  claim 1 , wherein the substrate has a side comprising surface features, and wherein the reflective layer is disposed on the side of the substrate comprising the surface features.  
     
     
         5 . The storage media of  claim 1 , further comprising a data storage layer disposed between the reflective layer and the optical layer, wherein the data storage layer comprises a material selected from the group consisting of an organic dye and an inorganic phase change compound.  
     
     
         6 . The storage media of  claim 1 , wherein the optical layer thickness is about 0.2 micrometers to about 120 micrometers.  
     
     
         7 . The storage media of  claim 1 , wherein the optical layer is a spin coated layer and the optical layer composition comprises acrylic polymers.  
     
     
         8 . The storage media of  claim 1 , further comprising data layers.  
     
     
         9 . The storage media of  claim 1 , further comprising a data layer comprising an organic dye.  
     
     
         10 . The storage media of  claim 1 , further comprising a data layer comprising a phase change material.  
     
     
         11 . A storage media, comprising: 
 a plastic substrate comprising polycarbonate;    an optical layer having an optical layer composition different from the substrate composition, wherein the optical layer is a spin coated;    a reflective layer disposed between the optical layer and the substrate; and    a protective layer;    wherein the storage media has a radial deviation over time of less than or equal to 1.15 degrees at a radius of 55 mm when exposed to a cycle at 25° C. of 50% relative humidity—90% relative humidity—50% relative humidity.    
     
     
         12 . The storage media of  claim 11 , further comprising data layers.  
     
     
         13 . The storage media of  claim 11 , further comprising a data layer comprising an organic dye.  
     
     
         14 . The storage media of  claim 11 , further comprising a data layer comprising a phase change material.  
     
     
         15 . A storage media, comprising: 
 a plastic substrate comprising polyarylene ether and polystyrene;    an optical layer having an optical layer composition different from the substrate composition, wherein the optical layer is a spin coated;    a reflective layer disposed between the optical layer and the substrate; and    a protective layer;    wherein the storage media has a radial deviation over time of less than or equal to 1.15 degrees at a radius of 55 mm when exposed to a cycle at 25° C. of 50% relative humidity—90% relative humidity—50% relative humidity.    
     
     
         16 . The storage media of  claim 15 , further comprising data layers.  
     
     
         17 . The storage media of  claim 15 , further comprising a data layer comprising an organic dye.  
     
     
         18 . The storage media of  claim 15 , further comprising a data layer comprising a phase change material.  
     
     
         19 . A method for making a data storage media, comprising: 
 disposing a reflective layer on a plastic substrate, wherein the plastic layer comprises a thermoplastic;    spin coating an optical layer onto the plastic substrate, wherein the optical layer comprises a thermoset; and    disposing a protective layer on the substrate;    wherein the storage media has a radial deviation over time of less than or equal to 1.15 degrees at a radius of 55 mm when exposed to a cycle at 25° C. of 50% relative humidity—90% relative humidity—50% relative humidity.