Patent ID: 8822032

Claim:
A glass article comprising a substrate and a phosphor-containing glass layer bonded to the substrate, wherein the phosphor-containing glass layer is a fired mixture of a frit glass and at least one phosphor, and the CTE of the phosphor-containing glass layer and the substrate are within ±5×10 −7 /° C. of each other, wherein the phosphor-containing glass layer is lead-free and is a fired mixture of a fit glass and at least one phosphor, and the difference in refractive index between the frit glass and the at least one phosphor is ≦0.20 and wherein the frit glass material consists essentially of, in mol %, 20-24% K 2 O, 8-12% ZnO, 2-6% Al 2 O 3 , 35-41% B 2 O 3 and 22-28 SiO 2 .