Patent ID: 6690024
Filing Date: 2004-02-10
Classification: G01N

Abstract:
A laser inspection apparatus comprising:a light source for outputting laser light; application means for applying the laser light output from the light source to any desired position on a board formed with a recess; detection means for detecting fluorescence generated from the board to which the laser light is applied and outputting a detection signal; and control means for controlling the application means based on the detection signal, wherein the application means scans laser light a predetermined direction in the proximity of the recess, the detection means detects a strength change of the fluorescence generated from the board as the laser light is scanned, and outputs a detection signal, and the control means calculates a tentative center position of the recess on the scan line based on the detection signal, then the application means is controlled by the control means so as to scan laser light in a direction passing through the calculated tentative center position and orthogonal to the scan line.