Patent ID: 6988377

Claim:
A method for forming an EUV lithography glass substrate, comprising: forming a slurry comprising titanium doped silica glass particles; providing a casting mold including therein a casting form, the casting form adapted to provide selected geometry void spaces within the EUV lithography glass substrate, inserting the titanium doped silica glass particle slurry into the casting mold; drying the slurry to form a green ware EUV lithography substrate; removing the casting form; and consolidating the green ware into a consolidated glass EUV lithography substrate having a homogeneous titanium silica glass dopant level in the range from 6 wt. % TiO 2 to about 9 wt. % TiO 2 and a homogeneous CTE in the range of +30 ppb/° C. to −30 ppb/° C. at 20–26° C.