A cooking apparatus which allows an interior of a cabinet thereof to be easily cleaned. The method includes arranging automatically a first application structure on the substrate using the application device. The second print media supplying section is removably installed in the first print media supplying section. The metal etch mask is then annealed to form source and drain ohmic contacts. An image intensity differential between adjacent columns may be calculated for matching with a predetermined differential profile or comparison with an electronic profile generated by a magnetic scan.