Master for optical element replication
US5051340A · kind A · utility
14Cited by
6References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1989 |
| Grant date | Sep 24, 1991 |
| Priority date | — |
| Expiry date | Jun 23, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A master for the replication of optical elements is prepared by the steps of: PA1 (a) focusing an information modulated energy beam on a phase-change optical recording layer so as to form a pattern of two different phases in said layer corresponding to said information; and PA1 (b) selectively etching away one of said two different phases so as to form a relief pattern corresponding to said information. The master so made can be used directly as the stamper in the injection molding process or the 2-P process for the replication of optical elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.