Apparatus and method for etching glass
US5246540A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 1992 |
| Grant date | Sep 21, 1993 |
| Priority date | — |
| Expiry date | Apr 1, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C15/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of etching a glass sheet using a curtain coater includes supporting the sheet at its periphery and in a generally horizontal position such that it may sag under its own weight. Sagging causes the uppermost surface of the glass sheet to assume a generally concave form. Etchant solution applied to the uppermost surface flows over the glass to form a nonuniform layer on the uppermost surface. The layer has a minimum thickness at the periphery of the glass sheet. Etchant solution is applied to the glass using a curtain coater designed to handle a corrosive etchant solution. The sheet of glass is supported on a frame including a seal to prevent etchant solution from contacting a second surface of the glass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.