Patent ID: 6160409
Filing Date: 2000-12-12
Classification: G01R

Abstract:
An inspection method of determining qualities of a plurality of conductive patterns on an electronic circuit board by applying a first electrical signal thereto through a first probe having a first contact pin, the electronic circuit board having a first group of plural terminals, a second group of plural terminals, and the plurality of conductive patterns for electrically connecting the first group of plural terminals to the second group of plural terminals, comprising:a moving step of supplying the first electrical signal to said first probe through the first contact pin while moving said first probe and a second probe having a second contact pin along a straight line substantially constituted by the first group of plural terminals without separating distal ends of said probes from a surface of the electronic circuit board, the distance between said first contact pin and said second contact pin being set to be less than a width of the terminal;a first detection step of detecting a second electrical signal appearing at each terminal of the second group of plural terminals while said first probe is supplying the first electrical signal to one terminal of the first group through the first contact pin;a second detection step of detecting a third electrical signal at said second contact pin;an identifying step of identifying a terminal, of the first group of plural terminals, to which the first electrical signal is supplied, on the basis of the third electrical signal obtained in the second detection step; andan evaluation step of evaluating a quality of a conductive pattern on the basis of the second electrical signal detected in the first detection step at one or a plurality of terminals of the second group which are connected to the terminal identified in the identifying step through conductive patterns.