Method of producing a surface microstructure on glass
US5090982A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1990 |
| Grant date | Feb 25, 1992 |
| Priority date | — |
| Expiry date | Jun 1, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/26
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method to produce a microstructure on glass which is of excellent quality and allows for repeated use of a stamper. The method comprises heating the glass to a surface temperature corresponding to a log viscosity between about 13 to 8 poise, supporting the glass and impressing it with the stamper heated to about the same temperature as the glass so that a microstructure on the heated stamper will deform the surface of the glass to give a corresponding microstructure on the surface of the glass, which when separated from the stamper and cooled in a controlled manner gives the desired surface microstructure on the glass. The method is particularly suitable for forming tracking grooves on optical disk substrates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.