Patent ID: 6162651
Filing Date: 2000-12-19
Classification: H01L,Y10S

Abstract:
A method for deprocessing a semiconductor die having an active area and at least one feature in the active area, the at least one feature having a characteristic size, the method comprising the steps of:(a) tuning an ablation laser, the step of tuning the ablation laser including the step of setting a desired spot size for the ablation laser, the desired spot size being the characteristic size of the at least one feature;(b) ablating a first portion of the semiconductor die using the ablation laser to provide a mark for a location of the feature, the first portion being distinct from the active area, the first portion having a center, the center of the first portion being substantially above the feature, the mark having a size based on the desired spot size, the size of the mark being less than or equal to approximately one micron for the at least one feature when the characteristic size is 0.25 micron; and(c) deprocessing a second portion of the semiconductor die using the first portion as a guide.