Patent ID: 8207009
Filing Date: 2012-06-26
Classification: B23K,H01L,Y02E

Abstract:
1. A method of laser scribing a film stack including a plurality of thin film layers on a substrate, comprising: applying a pulse of a laser beam onto the film stack, wherein the laser beam has a power that varies as a function of time during the pulse to complete a predetermined power cycle, wherein the pulse lasts about 0.1 nanoseconds to about 500 nanoseconds; and, repeating the pulse of the laser beam across the film stack to form a scribe line, wherein the power cycle has a power level that is adjusted to match properties of individual thin film layers and includes a first power level that is different than a second power level wherein the first power level is configured to scribe a first thin film layer, and wherein the second power level is configured to scribe an underlying second thin film layer.