Patent ID: 6220058
Filing Date: 2001-04-24
Classification: B23K,C03B,C03C,G02B,Y02P

Abstract:
A laser processing method for a glass substrate, comprising radiating the laser beam on the glass substrate, absorbing energy of the laser beam into the glass substrate, and altering a surface of the glass by melting, evaporation or ablation due to the energy, wherein microscopic concavities and convexities are formed on a surface of the glass substrate, by varying the spacial distribution of the intensity of the laser beam applied upon the surface of the glass substrate, thereby removing a greater amount of glass where the intensity is stronger, and less where the intensity is weaker, and wherein said glass substrate contains silver in the form of Ag atoms, Ag colloid or Ag ions to a predetermined depth with a concentration slope of the silver showing the highest concentration at the side surface to be processed and gradually decreasing to the predetermined depth.