Display device, and method of producing display device

A method of producing a display device which is obtained by applying ink to a display region of a substrate, the method comprising:

• an insulating film forming step of forming a transparent interlayer insulating film on the substrate;
• and
• a hole forming step of forming a hole, which causes the ink to be drawn into the hole, by exposing, with use of a mask for exposure, the transparent interlayer insulating film formed in the insulating film forming step and developing the transparent interlayer insulating film thus exposed,
• in the hole forming step, a third taper, which extends in a direction perpendicular to a direction in which the ink flows into the hole, being formed into a stepwise shape having a plurality of steps, and an angle of a tangential line connecting respective vertices of the plurality of steps of the third taper being made shallower than (i) an angle of a first taper which is located on a side of the hole on which side the ink flows into the hole and (ii) an angle of a second taper which is located on a side of the hole on which side the ink is pushed out from the hole.