Patent ID: 7259354
Filing Date: 2007-08-21
Classification: B23K,H05K

Abstract:
1. A method of effecting high speed removal of material from a target region of a specimen by operation of a laser tool, the target region having a substantially circular target perimeter defined by a target diameter extending through a target center, and the laser tool defining a beam axis along which a laser beam propagates, the laser beam defining at the target region a laser spot having a diameter that is smaller than the target diameter, comprising: causing relative movement between the beam axis and the target region to direct the beam axis to selected locations in the target region or selected locations near and in the target region to enable a process of material removal from the target region; directing the beam axis at an entry segment acceleration and along an entry trajectory to an entry position within the target region, the entry position corresponding to a location where emission of the laser beam is initiated on the target region; moving the beam axis at a circular perimeter acceleration within the target region to position the laser spot and thereby remove material along a circular segment of the target perimeter; and setting the entry segment acceleration and circular perimeter acceleration to values such that the entry segment acceleration value is less than twice the circular perimeter acceleration value.