Patent ID: 7641976

Claim:
A method for making a hermetically sealed glass package preform comprising: depositing a frit onto a glass substrate wherein the frit comprises about 65-100 wt. % of a base glass and about 0-35 wt. % of a filler; wherein the base glass comprises: about 0-5 mole % K 2 O; about 0-35 mole % Sb 2 O 3 ; about 0-20 mole % ZnO; about 10-40 mole % P 2 O 5 ; about 10-60 mole % V 2 O 5 ; about 0-5 mole % TiO 2 ; about 0-5 mole % B 2 O 3 ; about 0-5 mole % SiO 2 ; about 0-5 mole % WO 3 ; and about 1-10 mole % of a metal oxide selected from the group consisting of Fe 2 O 3 , Nd 2 O 3 , La 2 O 3 , Ce 2 O 4 , Pr 6 O 11 , Er 2 O 3 , and CeO 2 ; wherein the base glass has a mean particle size distribution of less than about 3 μm; and wherein the filler has a mean particle size distribution of between about 3 and 7 μm.