Apparatus for manufacturing an electronic circuit board

A method for manufacturing an electronic circuit board which contains an electronic circuit on a main surface of a glass substrate according to the invention sequentially performs a step of electrically inspecting the main surface of the glass substrate on which the electronic circuit is formed, a step of specifying positions and defect types of defects on the main surface of the glass substrate, a step of calculating reference point coordinates on the main surface of the glass substrate and correcting the coordinates, a step of extracting respective defects from an image around the defects and specifying a defect to be corrected in the extracted defects by referring to a defect existing range registered in advance for each defect type, and a step of cutting the specified defect. By this method, a foreign material adhering to the glass substrate is not erroneously judged as short-circuit defect causing short-circuit on the electronic circuit, and only defect actually requiring correction can be removed.