Patent ID: 8193468
Filing Date: 2012-06-05
Classification: B23K,H01L,H05K

Abstract:
1. A method for thermal-based laser processing a multilayer, multi-material memory device including a silicon substrate and a target metal link microstructure surrounded by materials having dissimilar thermal and/or optical properties, the method comprising: generating a single multi-stage temporally shaped laser pulse, said laser pulse having a selected pulse width and a temporal shape, said temporal shape comprising a fast leading edge and a fast fall time, respectively, relative to a q-switched pulse shape having the selected pulse width; irradiating and overfilling the target link with the single temporally shaped laser pulse; and removing at least a portion of the link with a thermal-based process without creating undesirable changes to other structures or the substrate with the single temporally shaped laser pulse; wherein each pulse stage is characterized by a controlled amplitude and temporal shape, and a duration comprising a respective portion of the overall pulse width, and wherein the single temporally shaped laser pulse comprises a higher power first portion and a lower power second portion.