Patent ID: 6597000
Filing Date: 2003-07-22
Classification: B01J,C12Q,G01N,G02B

Abstract:
A system for detecting marked regions on a surface, comprising:an excitation radiation source; a focusing optics constructed and arranged to focus radiation from said excitation radiation source onto a surface region of a wafer including several chips with probe sequences; a focusing system constructed and arranged to displace said wafer to bring at least a portion of said wafer in focus with respect to said focused radiation; a radiation direction system constructed and arranged to scan said excitation radiation across several surface regions; a translation stage upon which said wafer is mounted, said translation stage being moveable in at least one dimension and being arranged with said radiation direction system to scan a plurality of different chips on said wafer; a detector for detecting fluorescent radiation emitted from said surface region in response to said excitation radiation; and a data acquisition system for recording an amount of said fluorescent radiation detected as a function of a position on said surface region from which said fluorescent radiation was emitted.