Laser marking of ceramic materials, glazes, glass ceramics and glasses
US4769310A · kind A · utility
119Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1987 |
| Grant date | Sep 6, 1988 |
| Priority date | — |
| Expiry date | Jan 30, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/165
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of laser marking ceramic materials, glazes, glass ceramics and glasses that contain at least one radiation-sensitive additive, utilizing a laser beam as radiation energy source which is either applied to, or focused on, the surface of the material to be marked in accordance with the form of the graphic symbols to be reproduced, such that a change in color is induced at the irradiated areas, wherein the wavelength of said laser beam used as energy source is in the near UV and/or visible range and/or infra-red range, and the radiation-sensitive additive is an inorganic pigment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.