Display device, a method of manufacturing the display device, and electronic device including the display device

A method of manufacturing a display device, the method comprising:

• forming a lower metal pattern on a substrate;
• forming a first preliminary insulating layer covering the lower metal pattern on the substrate;
• forming an active pattern on the first preliminary insulating layer;
• forming a second preliminary insulating layer covering the active pattern on the first preliminary insulating layer;
• removing a portion of the first preliminary insulating layer and a portion of the second preliminary insulating layer to expose at least a portion of the lower metal pattern;
• removing a portion of the second preliminary insulating layer to expose at least a portion of the active pattern;
• and
• forming a first electrode contacting the lower metal pattern and the active pattern.

An electronic device comprising:

• a lower metal pattern located on a substrate;
• a first insulating layer covering the lower metal pattern, wherein the first insulating layer defines a first hole exposing at least a portion of the lower metal pattern and including a first side surface forming a first angle with an upper surface of the lower metal pattern;
• an active pattern located on the first insulating layer;
• a second insulating layer covering the active pattern, wherein the second insulating layer defines a second hole at least partially overlapping the first hole in a plan view and including a second side surface forming a second angle which is smaller than the first angle with an upper surface of the first insulating layer;
• a first electrode located on the second insulating layer, wherein the first electrode contacts the lower metal pattern through the first hole and the second hole;
• and
• a memory configured to store data information.