Display device, electronic device including the display device, and method for manufacturing the display device

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

• forming a pad portion on an upper surface of a peripheral area of a substrate;
• forming an emission layer and a sensing electrode above a display area of the substrate;
• applying a protective material layer above the sensing electrode;
• positioning a photomask above the protective material layer and irradiating light through the photomask;
• developing the protective material layer to form a protective layer;
• and
• forming a planarization layer above the protective layer,
• the photomask including
• a first light-blocking portion overlapping the pad portion,
• a first light-transmitting portion overlapping the planarization layer,
• a second light-transmitting portion surrounding the first light-blocking portion, and
• a third light-transmitting portion surrounding the second light-transmitting portion, and
• a light transmittance in the first light-transmitting portion and the second light-transmitting portion being 90% to 99.9%.

An electronic device, comprising:

• a display module;
• and
• a processor connected to the display module,
• the display module comprising
• a substrate including a display area and a peripheral area adjacent to the display area;
• an emission layer above the display area;
• a pad portion disposed on an upper surface of the peripheral area;
• a sensing layer above the emission layer;
• a protective layer above the sensing layer;
• and
• a planarization layer above the protective layer,
• the sensing layer including a sensing electrode,
• the protective layer comprising a first portion overlapping the planarization layer, a second portion, and a third portion overlapping the peripheral area,
• the protective layer having a first opening in the peripheral area and overlapping the pad portion, the second portion surrounds a periphery of the first opening, and the third portion includes a portion surrounding a periphery of the second portion, and
• a thickness of the third portion being smaller than a thickness of the first portion and a thickness of the second portion.