Patent ID: 9499428
Filing Date: 2016-11-22
CPC Classification: C03B,C03C

Claim Text:
1. A method of forming a seal between at least two glass substrates comprising: (a) providing at least two glass substrates and an enamel paste, the enamel paste comprising at least one glass composition having a dilatometric softening point, the enamel paste covering at least a portion of at least one of the at least two glass substrates to form an assembly, the portion of the substrates so covered defining a seal area and the portion of the substrates not so covered defining a non-seal area, wherein the enamel paste comprises a lead-free and cadmium-free glass composition comprising in mole percent: 25-65% Bi2O3, 3-60% ZnO, 4-65% B2O3, 0-50% (SiO2+Al2O3), and 0-20% TiO2+ZrO2, and no V2O5, (b) providing at least one absorber in the seal area of at least one substrate, (c) heating the at least two substrates to a temperature below the dilatometric softening point of the at lead-free and cadmium-free glass composition using a thermal heat source, and (d) irradiating the enamel paste with a broadband infrared source to fuse the enamel paste and thereby form a seal between the at least two glass substrates; wherein (c) is performed prior to (d).