Patent ID: 7336816
Filing Date: 2008-02-26
Classification: G01B,G06T,H05K

Abstract:
1. An apparatus for measuring a shape of bumps, comprising: a stage on which a board arranged thereon with a plurality of bumps to be measured is placed and moved; an illumination optical system which illuminates the bumps arranged on said board moved by said stage with illumination light using an illumination optical axis having a low tilt angle to a surface of said board; a detection optical system which condenses the reflected light from the bumps illuminated by said illumination optical system for detection of image signals of the bumps using a detection optical axis having a tilt angle higher than that of said illumination optical axis to the surface of said board; an image processing unit which A/D converts the image signals of the bumps detected by said detection optical system to obtain digital image signals of the bumps, calculates an outline of at least a tip and a base of each of the bumps based on the image signals of at least the tip and the base of each of the bumps obtained based on the digital image signals of the bumps, and calculates geometric characteristics including at least a position and a height of each of the bumps are calculated based on the outline of at least the tip and the base of each of the bumps; and a main control unit which allows a display unit to display thereon information on the geometric characteristics of each of the bumps calculated by said image processing unit.