Patent ID: 7382389
Filing Date: 2008-06-03
Classification: B23K,H01L,H05K

Abstract:
1. A method for thermal-based laser processing a multi-material device including a substrate and a microstructure, the method comprising: generating two or more laser pulses having at least one predetermined characteristic based on a differential thermal property of materials of the device; and irradiating the microstructure with the two or more laser pulses wherein a first pulse increases a difference in temperature between the substrate and the microstructure and wherein a second pulse further increases the difference in temperature between the substrate and the microstructure to process the multi-material device without damaging the substrate; wherein the pulses are spaced such that the temperature of the substrate decays rapidly and stabilizes during a time between irradiation of the microstructure with a pair of pulses of said two or more laser pulses, and wherein the two or more pulses irradiate the microstructure during relative motion between the microstructure and a laser beam path associated with the pulses.