Patent ID: 6861364
Filing Date: 2005-03-01
Classification: B23K

Abstract:
1. A laser etching method for optical ablation working by irradiating a work article formed by an inorganic material with a laser light from a laser oscillator capable of emitting in succession light pulse of a large energy density in space and time with a pulse radiation time not exceeding 1 picosecond; wherein, in laser etching of the work article formed by said inorganic material by irradiation thereof with the laser light from said laser oscillator with a predetermined pattern and with a predetermined energy density, there is utilized means for preventing deposition of a work by-product around the etching position, wherein said means for preventing deposition of the work by-product around the etching position is adapted, in irradiating the work article with said laser light, for executing irradiation of said laser light in a state where said work article is positioned in silicone oil.