Patent ID: 8329600
Filing Date: 2012-12-11
Classification: B23K,H01C

Abstract:
1. A system for high-speed, laser-based, precise laser trimming at least one electrical element having at least one measurable property, the at least one element being supported on a substrate, the system comprising: a laser subsystem to generate a pulsed laser output having one or more laser pulses at a repetition rate, each laser pulse having a pulse energy, a visible laser wavelength, and a pulse duration; a beam delivery subsystem that accepts the pulsed laser output and includes: a controller coupled to the beam delivery and laser subsystems to control the beam delivery and laser subsystems to selectively irradiate the at least one element such that the one or more laser output pulses having the visible laser wavelength, the pulse duration, the pulse energy and the spot diameter selectively remove material from the at least one element and laser trim the at least one element along a trim path while avoiding substantial microcracking within the at least one element, the laser wavelength being short enough to produce desired short-wavelength benefits of small spot size, tight tolerance, high absorption and reduced or eliminated heat-affected zone (HAZ) along the trim path, but not so short so as to cause microcracking.