Display device and method of providing display device

An electronic device comprising:

• a display device comprising:
• a display area including:
• a display element including a pixel electrode, and
• a driving element connected to the display element;
• a planarization layer on the driving element and defining a groove which is in the planarization layer and non-overlapping the pixel electrode;
• and
• a pixel defining layer on the planarization layer and defining an opening corresponding to the pixel electrode of the display element, the pixel defining layer including:
• a bank portion defining the opening and extending from the pixel electrode, the bank portion including:
• a flat portion having an upper surface which is furthest from the planarization layer and a lower surface which is closest to the planarization layer, and
• a first protrusion which protrudes from the lower surface of the flat portion of the bank portion, in a direction toward the planarization layer, and fills the groove in the planarization layer;
• and
• a second protrusion which protrudes from the upper surface of the flat portion of the bank portion, in a direction away from the planarization layer, and is further from the opening than the first protrusion.

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

• providing a display element including a pixel electrode and a driving element which is connected to the display element, in a display area;
• providing a planarization layer on the driving element;
• and
• providing a pixel defining layer on the planarization layer and defining an opening corresponding to the pixel electrode of the display element, the pixel defining layer including:
• a bank portion defining the opening and extending from the pixel electrode, the bank portion including:
• a flat portion having an upper surface which is furthest from the planarization layer,
• a first protrusion which protrudes from the upper surface of the flat portion, in a direction away from the planarization layer, and is adjacent to the pixel electrode;
• and
• a second protrusion which protrudes from the upper surface of the flat portion, in the direction away from the planarization layer, and is further from the opening than the first protrusion,
• wherein the providing of the pixel defining layer includes:
• providing a photosensitive organic layer on the planarization layer;
• providing a mask facing the photosensitive organic layer, the mask divided into a light blocking portion corresponding to the opening, a first light transmitting portion corresponding to the first protrusion, a semi-transmitting portion corresponding to the upper surface of the flat portion between the first protrusion and the second protrusion, and a second light transmitting portion corresponding to the second protrusion;
• and
• providing the pixel defining layer by exposing and developing the photosensitive organic layer through the mask, including:
• providing the opening by removing all of the photosensitive organic layer corresponding to the light blocking portion of the mask;
• providing the first protrusion by leaving a thickness portion of the photosensitive organic layer which corresponds to the first light transmitting portion of the mask;
• providing the second protrusion by leaving a thickness portion of the photosensitive organic layer which corresponds to the second light transmitting portion of the mask;
• and
• providing the upper surface of the flat portion which is between the first protrusion and the second protrusion exposed to outside the pixel defining layer, by removing a thickness portion of the photosensitive organic layer which corresponds to the semi-transmitting portion of the mask.