Patent ID: 6987786
Filing Date: 2006-01-17
Classification: B23K,H01L,H05K

Abstract:
1. A method of laser processing of a structure comprising: providing a multilevel, multi-material device comprising a target structure positioned over a substrate; providing a laser processing system that produces a non-circularly polarized laser beam, having a beam providing element and a focusing element; performing an orientation determining step to determine an orientation of the target structure and the polarized laser beam relative to each other such that processing of the target structure by the polarized laser beam occurs within a processing energy window that is larger than processing energy windows corresponding to other orientations of the structure and the polarized laser beam relative to each other; processing the structure by the beam providing element providing the non-circularly polarized laser beam and the focusing element focusing the non-circularly polarized laser beam onto the target structure, the structure and the polarized laser beam being at the orientation relative to each other determined by the orientation determining step, the non-circularly polarized laser beam being oriented substantially parallel to the target structure or substantially perpendicular to the target structure such that the range of pulse energies that process the target structure cleanly and reliably is at or near the maximum.