Method and tool for laser texturing of glass substrates
US5910262A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1997 |
| Grant date | Jun 8, 1999 |
| Priority date | — |
| Expiry date | Feb 6, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/0057
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for laser texturing symmetrically and simultaneously both sides of a glass containing substrate, such as a magnetic disk. There are two or more acousto-optic modulators arranged in series to obtain equal laser pulses from a first beam from a laser, apparatus for capturing a first order diffracted beam from each acousto-optic modulator; monitoring the wavelength of the laser source, providing a visible indicator or diagnostic bean for each first order diffracted beam, and combining each first order diffracted beam with its respective indicator beam to form a texturing beam for texturing each side of the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.