Patent ID: 7880117
Filing Date: 2011-02-01
Classification: B23K

Abstract:
1. A laser micromachining system for drilling holes in a work piece comprising: a laser beam generator for directing a laser beam having a wavelength λ, along an optical path, an image interpolating mask having an array of apertures, disposed in the optical path, for receiving the laser beam and forming a corresponding array of sub-beams of a first pitch size, the array of sub-beams being a sub-pattern of a reduced-size pattern formed on the work piece, a demagnifier, disposed in the optical path, for forming the reduced-size pattern of the array of sub-beams on the work piece, the reduced-size pattern having a second pitch size, and a translation stage coupled to the image interpolating mask for moving the image interpolating mask and the array of sub-beams in a perpendicular direction to the optical path such that the array of sub-beams is moved in a sequence to form the reduced-size pattern on the work piece, wherein the second pitch size is less than λ and the first pitch size is greater than λ, and when the laser beam is generated and the translation stage moves the array of sub-beams, the image interpolating mask is effective in forming an array of holes having the second pitch size.