Manufacturing method of display device

A manufacturing method of a display device including first, second and third display elements which emit light of different colors, the method including:

• preparing a substrate;
• forming a first lower electrode, a second lower electrode and a third lower electrode above the substrate;
• forming a rib layer on the first lower electrode, the second lower electrode and the third lower electrode, the rib layer including
• a first aperture overlapping the first lower electrode,
• a second aperture overlapping the second lower electrode, and
• a third aperture overlapping the third lower electrode:
• forming a partition including
• a lower portion located on the rib layer, and
• an upper portion located on the lower portion and having an end portion protruding from a side surface of the lower portion;
• forming the first display element on the substrate, the forming the first display element including
• forming a first stacked film having
• a first organic layer which is in direct contact with the first lower electrode at the first aperture and emits light based on application of voltage, and
• a first upper electrode which covers the first organic layer, and
• forming a first sealing layer which covers the first stacked film;
• and
• performing a first lighting inspection for causing the first display element to light up before forming the second display element and the third display element,
• wherein
• the first stacked film is formed in an area surrounded by the partition,
• the first sealing layer continuously covers the first stacked film and the partition, and
• the first lighting inspection is performed in the air.