Patent ID: 9245757
Filing Date: 2016-01-26
CPC Classification: B23K,H01L

Claim Text:
1. A laser annealing treatment apparatus that crystallize a semiconductor comprising: a laser light source that outputs pulse laser light; an optical system that shapes the pulse laser light, and leads the shaped pulse laser light to a semiconductor film subject to treatment; a stage to be set for irradiating the semiconductor film by the pulse laser light; and a waveform shaping unit that shapes the pulse laser light output from the laser light source into a pulse waveform having a rising time and a falling time, wherein the waveform shaping unit comprises beam splitting means that splits a plurality of times the pulse laser light output from the laser light source into a plurality of beams and delay means that delays each of the split beams, and wherein the waveform shaping unit shapes the pulse laser light output from the laser light source so that the pulse laser light waveform irradiating the semiconductor film includes a rising time equal to or less than 30 nanoseconds from 10% of the maximum height to the maximum height in the pulse energy density, and a falling time equal to or more than 85 nanoseconds from the maximum height to 10% of the maximum height.