Aluminum substrate disk having silica gel coating

Abstract

A magnetic recording disk having a silica gel layer disposed between an aluminum substrate and a magnetic recording layer.

What is claimed is:  
     
         1 . A magnetic recording disk, comprising: 
 a substrate comprising aluminum;    a magnetic recording layer; and    a silica gel layer disposed between the substrate and the magnetic recording layer.    
     
     
         2 . The magnetic recording disk of  claim 1 , further comprising a NiP layer disposed between the substrate and the silica gel layer.  
     
     
         3 . A disk drive, comprising: 
 a magnetic recording disk comprising an aluminum substrate, a magnetic recording layer, and a silica gel layer disposed between the substrate and the magnetic recording layer; and    a recording head to transfer data to and from the magnetic recording disk.    
     
     
         4 . The disk drive of  claim 3 , wherein the magnetic recording disk further comprises a NiP layer disposed between the substrate and the silica gel layer.  
     
     
         5 . A method, comprising: 
 producing a substrate comprising aluminum;    disposing a silica gel layer above the substrate; and    depositing a magnetic layer above the silica gel layer.    
     
     
         6 . The method of  claim 5 , further comprising disposing a NiP layer between the substrate and the silica gel layer.