Glass for laser processing and method for producing perforated glass using same
AssigneeNippon Sheet Glass Co., Ltd.
InventorsTeruhide Inoue, Koichi Sakaguchi, Hirotaka Koyo
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Abstract
The present invention provides a glass composition that allows holes with a circular contour and a smooth inner wall to be formed by a collective micro-hole-forming process using a combination of modified portion formation by ultraviolet laser irradiation and etching, the glass composition being adapted for practical continuous production. The present invention relates to a glass for laser processing, the glass having a glass composition including, in mol %: 45.0%≤SiO2≤70.0%; 2.0%≤B2O3≤20.0%; 3.0%≤Al2O3≤20.0%; 0.1%≤CuO≤2.0%; 0%≤TiO2≤15.0%; and 0%≤ZnO≤9.0%, wherein a relationship of 0≤Li2O+Na2O+K2O<2.0% is satisfied.
Claims13
A glass for laser processing, the glass having a glass composition comprising, in mol %:
- 45. 0%≤SiO2≤70.0%;
- 2.0%≤B2O3≤20.0%;
- 3.0%≤Al2O3≤20.0%;
- 0.2%≤CuO≤0.8%;
- 0%≤TiO2≤15.0%;
- and
- 0%≤ZnO≤9.0%,
- wherein a relationship of 0≤Li2O+Na2O+K2O<2.0% is satisfied.
Dependencies are inferred from the claim text.