Patent ID: 7795165

Claim:
An optical patterning glass material characterized in that said optical patterning glass material contains a photosensitive resin which is mixed with a powder-form lead-free bismuth glass wherein the optical-absorption coefficient of the material at a wavelength of 365 nm is 300 to 3000 cm −1 , and wherein the lead-free bismuth glass comprises 40 to 80 wt % of Bi 2 O 3 , 1to 20 wt % of SiO 2 , 0.5 to 10 wt % of Al 2 O 3 , 5 to 20 wt % of B 2 O 3 , 1 to 20 wt % of ZnO, 0 to 5 wt % of ZrO 2 , 0 to 15 wt % of alkaline earth metal oxides and 0.1 to 2 wt % of oxides of one or more optical absorption elements selected from the group consisting of: Ti, V, Cr, Co, Fe, Ni, Mo, Ce, Sm and Eu.