Patent ID: 7750268
Filing Date: 2010-07-06
Classification: B23K,H01L,Y10S,Y10T

Abstract:
1. A method for processing a target material in a multi-material device on a substrate, said target material having a specified dimension in a microscopic region of said multi-material device, said method comprising: generating one or more laser pulses; forming at least one modified laser pulse from the one or more laser pulses; directing during continuous relative motion the at least one modified laser pulse to the target material so as to progressively heat the target material; and timing the laser pulse generation to correlate with relative positions of the target such that the at least one modified laser pulse accurately impinges on the target material, wherein said modified laser pulse has a sharp rise time sufficient to reduce reflectivity of the target material to minimize heat dissipation to the substrate underneath the target material and to minimize heat conduction laterally to contiguous material in a vicinity of the target material, wherein said at least one modified laser pulse has a rapid fall time sufficient to reduce damage to said contiguous material in the vicinity of the target material, and wherein said at least one modified laser pulse has a sufficient thermal energy to sever said target material.