Patent ID: 7341964

Claim:
A lead-free, glass frit consisting essentially of in percent by weight from about 26% to about 63% SiO 2 , from about 2% to about 10.5% ZnO, from about 8% to about 20% B 2 O 3 , from about 0.1% to about 10% Bi 2 O 3 , up to about 12% Na 2 O, from about 0.1% to about 17% K 2 O, up to about 6% Li 2 O, from about 0.1% to about 22% of Ta 2 O 5 , from about 0% to about 22% of Nb 2 O 5 , up to about 8% of each of Al 2 O 3 , TiO 2 , ZrO 2 , BaO and SrO, from about 0.1% to about 7% Sb 2 O 3 , up to about 7% F, up to about 4% of each of CaO, Mo 2 O 3 and MgO, and from about 0.1% to about 4% of one or more of La 2 O 3 , Nd 2 O 3 , Pr 2 O 3 or Ce 2 O 3 .