Patent ID: 6450180
Filing Date: 2002-09-17
Classification: B23K,Y10S

Abstract:
A method of laser treatment for the ablation, by UV laser radiation in an oxidizing environment, of photoresists from substrate surfaces chosen from the group consisting of semiconductor wafers and flat panel, said method comprising:(a) dividing a substrate surface into a plurality of transverse strips, said transverse strips being parallel and adjacent each other, each of said strips being divided into a number of elementary portions; (b) irradiating a pulse laser beam onto a first of said elementary portions comprised in a first of said strips; (c) irradiating said beam onto a second of said elementary portions comprised in a second of said strips, wherein said second of said strips is not adjacent to said first of said strips; (d) thereafter, successively irradiating said beam onto said elementary portions arranged in such a succession that each of said portions is comprised in a strip which is different from the strip which comprises the immediately preceding and from the strip which comprises the immediately following ones of said elementary portions; and (e) continuing to irradiate said beam onto said elementary portions of said succession until all of said elementary portions of said plurality of transverse strips have been irradiated.