Patent ID: 8049138
Filing Date: 2011-11-01
Classification: B23K,B29C,B81B,B81C,G02B,G03H,G11B,Y10S,Y10T

Abstract:
1. An apparatus for processing a three-dimensional structure which includes at least a flat substrate, a thin layer formed on said flat substrate, a thermal insulation layer interposed between the thin layer for absorption of laser light and the flat substrate, and a transparent layer formed on said thin layer, said apparatus comprising: process laser light generating means for introducing a process laser light into said thin layer for absorption of laser light having a thermal diffusion rate greater than that of said flat substrate, passing through said transparent layer; mask movement means for moving a mask in which said process laser light passes, said mask allows a transmission pattern of said process laser light to be varied, and said process laser light can be radiated, from said process laser light generating means, several times onto the same portion after changing said transmission pattern; stage movement means for moving a stage holding said three-dimensional structure; and process laser light adjusting means for adjusting pulse injection energy of the process laser light emitted from said process laser light generating means, said process laser light is introduced from said process laser light generating means into said transparent layer and said thin layer for absorption of laser light, so that said pulse injection energy of the process laser light emitted from said process laser light generating means is controlled by said process laser light adjusting means to be the same as or smaller than the maximum pulse injection energy capable of exposing a flat surface of said thermal insulation layer at an interface between said thermal insulation layer and said thin layer, and controlled by said process laser light adjusting means to be the same as or greater than the minimum pulse injection energy capable of removing said transparent layer, and said process laser light adjusting means adjusting the pulse injection energy of the process laser light so that a one-shot laser pulse removes a pair of said thin layer for absorption of laser light and said transparent layer from a plurality of pairs of said thin layer for absorption of laser light and said transparent layer, and the apparatus is configured to remove pairs of the layers in accordance with the number of the one-shot laser pulses.