Control of median crack depth in laser scoring
US6327875A · kind A · utility
51Cited by
5References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1999 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | Mar 9, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B33/091
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A glass sheet is separated by propagating a crack in the glass sheet by moving a laser beam across the surface of the glass sheet along a desired line of separation and then streaming coolant at the glass sheet at a predetermined distance behind the laser beam. By altering the profile of a laser beam used to score glass, and by changing the distance between the spot where the laser beam impinges on the glass and the spot struck by the stream of coolant, the penetration depth of the resultant median crack can be controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.