Strengthened glass ii

Abstract

There is an article of manufacture. The article includes an aluminosilicate glass object. The glass object is characterized by having a surface compression of at least 100,000 psi at a surface with a case depth of at least 65 microns below the surface, wherein the glass object is further characterized as including at least some amounts of Li2O, Na2O and K2O.

What is claimed is: 
     
         1 . An article of manufacture comprising:
 a strengthened aluminosilicate glass object characterized by having a surface compression of at least 100,000 psi at a surface with a case depth of at least 65 microns below the surface,
 wherein the glass object is further characterized as including at least some amounts of Li 2 O, Na 2 O and K 2 O. 
   
     
     
         2 . The article of  claim 1 ,
 wherein the glass object has a case depth of at least at 75 microns below the surface.   
     
     
         3 . The article of  claim 1 ,
 wherein the glass object has a case depth of at least at 120 microns below the surface.   
     
     
         4 . The article of  claim 1 ,
 wherein the glass object has a case depth of at least at 175 microns below the surface.   
     
     
         5 . The article of  claim 1 ,
 wherein the glass object has a case depth of at least at 250 microns below the surface.   
     
     
         6 . The article of  claim 1 ,
 wherein the glass object has a case depth of at least at 300 microns below the surface.   
     
     
         7 . The article of  claim 1 ,
 wherein the glass object has a case depth of at least at 400 microns below the surface.   
     
     
         8 . The article of  claim 1 ,
 wherein the glass object has a case depth of at least at 500 microns below the surface.   
     
     
         9 . The article of  claim 1 ,
 wherein the glass object has a case depth of at least at 550 microns below the surface.   
     
     
         10 . The article of  claim 1 ,
 wherein the glass object includes a composition with varying amounts of Na 2 O and K 2 O at different depths below the surface of the glass object.   
     
     
         11 . The article of  claim 1 ,
 wherein the glass object includes 7 to 30 weight % Al 2 O 3 .   
     
     
         12 . The article of  claim 1 ,
 wherein the glass object includes less than 9 weight % Li 2 O.   
     
     
         13 . The article of  claim 1 ,
 wherein the glass object includes less than 3 weight % Li 2 O.   
     
     
         14 . The article of  claim 1 ,
 wherein the glass object includes less than 2% by weight of K 2 O, Na 2 O or a combination thereof.   
     
     
         15 . The article of  claim 1 ,
 wherein the glass object has a surface compression between 100,000 to 145,000 psi at the surface.   
     
     
         16 . The article of  claim 1 ,
 wherein the glass object has a surface compression up to 145,000 psi at the surface.   
     
     
         17 . The article of  claim 1 ,
 wherein the glass object has a surface compression greater than 145,000 psi at the surface.   
     
     
         18 . The article of  claim 1 ,
 wherein the glass object includes up to 4 weight % each of ZrO 2 , TiO 2 , MgO and ZnO, and totaling no more than 10 weight % of a combination thereof.   
     
     
         19 . The article of  claim 1 , wherein the glass object is flat. 
     
     
         20 . The article of  claim 1 , wherein the glass object is made from a flat glass.