| 摘要 |
PURPOSE:To precisely cut a small-sized or intricately shaped glass part at a low cost by irradiating the surface-treated glass with a laser beam and irradiating the glass part. CONSTITUTION:A glass sheet 2 coated with an opaque film 1 by vapor deposition as shown in (a) as an example of heat treatment is fixed on the stage of a CO2 laser beam machine. The surface to be vapor-deposited is irradiated with a laser beam as shown in (b), hence the laser beam is converted into heat on the surface, and the glass is melted. The molten glass part 3 is matted to lower the transmittance to the laser beam, heat is again produced, and the glass is melted. The process is repeated, the laser beam finally pierces through the sheet 2 as shown in (c), and the glass is completely cut. The remaining vapor-deposited film is removed by etching. Ion plating, printing, org. film coating or various matting methods are exemplified as the surface treatment. |
