Vacuum insulated glass (VIG) window unit with reduced seal height variation and method for making same

摘要

A vacuum insulated glass (VIG) window assembly and method for making same is provided in which a variation in the final edge seal height is preferably 0.20 mm or less, more preferably about 0.15 mm or less. Controlling final edge seal height variations substantially reduces breakage of the glass substrates of the VIG window assembly during vacuum pump-down of the cavity between the glass substrates. Edge seal height variation may be controlled, for example, by controlling initial dispensing of green frit material, controlling temperature variations during firing, and/or controlling cycle times during firing.

主权项

1. A vacuum insulated glass (VIG) window unit comprising:
a first glass substrate and a second glass substrate; a seal material consisting essentially of frit sandwiched between the first and second glass substrates defining a periphery of a cavity formed between the first and second substrates, the cavity between the substrates being at a pressure less than atmospheric, a plurality of spacers provided between the first and second glass substrates for spacing the first and second glass substrates from each other; and the seal material consisting essentially of frit forming a hermetic seal between the first and second glass substrates of the VIG window unit, wherein a variation in a height of the seal material around the entire cavity is less than or equal to 0.15 mm.