Electronic device including wing plate and method of providing wing plate

An electronic device comprising:

• a display comprising a first area, a second area, and a folding area which is between the first area and the second area;
• a housing comprising a first housing overlapping the first area of the display and a second housing overlapping the second area of the display;
• a hinge which connects the first housing to the second housing, overlaps the folding area and is foldable together with the display;
• and
• a plurality of sheets laminated to each other and between the hinge and the display, the plurality of sheets which are laminated to each other defining a wing plate between the hinge and the display
• wherein
• the hinge which is folded includes the first area of the display and the second area of the display facing each other, and
• the hinge which is unfolded includes the first area of the display and the second area of the display not facing each other.