Glass for laser processing

Details Glass for laser processing Glass for laser processing

2008-07-15

2008-07-15

Lorengo, Jerry A. (Department: 1793)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S066000, C501S068000, C501S069000, C501S072000, C501S055000

Reexamination Certificate

active

07399721

ABSTRACT:
A glass for laser processing of the present invention can be laser-processed by causing ablation or evaporation by laser beam energy absorbed therein, wherein the glass for laser processing has a composition that satisfies the following conditions:in-line-formulae description="In-line Formulae" end="lead"?60≦SiO2+B2O3≦79 mol %;in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?5≦Al2O3+TiO2≦20 mol %; andin-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?5≦Li2O+Na2O+K2O+Rb2O+Cs2O+MgO+CaO+SrO+BaO≦20 mol %,in-line-formulae description="In-line Formulae" end="tail"?where 5≦TiO2≦20 mol %. The present invention can provide a glass for laser processing that has a low laser processing threshold value as well as a low thermal expansion coefficient.

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