| 摘要 |
PURPOSE:To prevent deformation of a quartz material caused by heat treatment, by irradiating falling melted quartz with laser beam from an OH laser device, so that an OH group in quartz is taken out of the quartz. CONSTITUTION:The quartz powder 1, a raw material for a quartz material, is dropped, melted by the oxyhydrogen burners 2 and 3, and set in a mold to give the quartz material 5. In the operation, the falling melted quartz 4 is irradiated with the laser beam 7 from the OH laser device 6, an OH group in the quartz 4 is excited, and taken out of the quartz, to reduce the OH group. Consequently, the quartz material has a softening point free from depression, and will not be deformed in a heat treatment process to form an active element of a liquid crystal panel. |
