The cover assembly includes {HEAD ~ an aluminosilicate glass substrate} that is substantially free of {TAIL ~ retardance induced visual defects} and has a thickness of less than 2 mm, a retardance of less than or equal to 5 nm over an area of at least 170 in2 , a 4 point bend strength of greater than 150 MPa 
The cover assembly includes { HEAD ~ an aluminosilicate glass substrate } that is substantially free of { TAIL ~ retardance induced visual defects } and has a thickness of less than 2 mm , a retardance of less than or equal to 5 nm over an area of at least 170 in2 , a 4 point bend strength of greater than 150 MPa
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH