Patent ID: 7838794
Filing Date: 2010-11-23
Classification: B23K,H01L,H05K

Abstract:
1. A laser-based method of removing a target link structure of a circuit fabricated on a substrate without causing undesirable damage to the substrate, any dielectric layers between the target link structure and the substrate, or link structures adjacent the target link structure, the target link structure being in a set of link structures, at least some link structures in the set of link structures being separated by a pitch of less than 2 μm, the method comprising: generating a sequence of laser pulses at a repetition rate of greater than about 1 MHz utilizing a seed laser having a first predetermined wavelength; optically amplifying at least a portion of the sequence of laser pulses to obtain an amplified sequence of output pulses; and delivering and focusing pulses of the amplified sequence of output pulses onto the target link structure during relative motion of the substrate, substantially all output pulses of the amplified sequence of output pulses having a pulse duration less than about 100 picoseconds, corresponding pulse power densities in the range of at least about 10