Patent ID: 8883530

Claim:
A device manufacturing method, comprising: preparing a substrate; forming, on the substrate, a plurality of pixel electrodes arranged at intervals and forming one or more electrical wires each between adjacent pixel electrodes among the plurality of pixel electrodes; forming a photosensitive film by applying a photosensitive material onto the substrate; arranging, after forming the photosensitive film, a first photomask to face the substrate and performing a first exposure to cause a first part of the photosensitive film to be exposed to light via the first photomask; arranging, after or together with an execution of the first exposure, a second photomask to face the substrate and performing a second exposure to cause a second part of the photosensitive film to be exposed to light via the second photomask; and developing the photosensitive film of which the first part and the second part have been exposed to the light in the first exposure and the second exposure, respectively, wherein, in the second exposure, the second photomask is specifically arranged such that an end thereof overlaps with an end of the first photomask arranged in the first exposure and a portion thereof is non-overlapping with the first photomask arranged in the first exposure, and an overlap between the first part and the second part of the photosensitive film is exposed to the first exposure via the first photomask and to the second exposure via the second photomask and positionally corresponds to an electrical wire among the one or more electrical wires, and non-overlapping portions of the first part and the second part of the photosensitive film are each exposed to one of the first exposure and the second exposure via one of the first photomask and the second photomask and positionally correspond to pixel electrodes among the plurality of pixel electrodes.