Display device and manufacturing method of display device

A manufacturing method of a display device that includes a first conductive layer and a second conductive layer arranged across an insulating layer from said first conductive layer, said manufacturing method comprising:

• forming said first conductive layer by a first conductive layer forming process;
• forming the insulting layer on said first conductive layer;
• forming the second conductive layer on said insulating layer by a second conductive layer forming process, so that an overlap section at which said second conductive layer overlaps with said first conductive layer is provided;
• and
• fixing a fault by a repair process, if the fault is generated in said overlap section, wherein:
• at least one of said first conductive layer forming process and said second conductive layer forming process includes forming a slit portion on at least one of said first conductive layer and said second conductive layer by a slit forming process, by which said slit portion is formed in said overlap section so as to have a smaller slit width at a medial area except both end areas of said slit portion, than at the both end areas;
• and
• said repair process includes cutting off an area of said fault by radiating a laser beam to a conductive layer portion adjacent to an end area of said slit portion provided as a relatively wide area thereof, starting at the end area.