Patent ID: 6596965
Filing Date: 2003-07-22
Classification: B23K,H01L

Abstract:
A method for marking an identification mark on a wafer comprising:providing a laser beam radiating section that radiates a laser beam when activated; engraving a wafer identification mark onto a predetermined portion of the wafer by radiating the laser beam onto the predetermined portion of the wafer; generating signals corresponding to the intensity of power applied to activate the laser beam radiating section; producing a flow of gas in a blowing section for use in blowing particles away from a surface of the wafer; when the generated signals are indicative of an intensity of power being applied to the laser beam radiating section, controlling the blowing section in response to the signals to blow the gas in a flow direction towards the predetermined portion of the wafer so as to blow particles away from the surface of the wafer while the laser beam is being radiated; and when the generated signals are indicative of the laser beam radiating section being deactivated, controlling the blowing section in response to the signals to interrupt the flow of gas towards the wafer.