Electronic device comprising transparent cover including glass and foldable display coupled thereto

An electronic device comprising:

• a transparent cover that comprises a first section, a second section, and a folding section between the first section and the second section;
• and
• a flexible display coupled to the transparent cover,
• wherein the transparent cover comprises:
• a first layer comprising glass;
• and included in the first, second, and folding sections,
• a second layer between the first layer and the flexible display and included in the first, second, and folding sections,
• a third layer between the first layer and the second layer and included in the first, second, and folding sections,
• a fourth layer between a portion of the third layer and a portion of the second layer at the first section and comprising glass, and
• a fifth layer between a portion of the third layer and a portion of the second layer at the second section and comprising glass,
• wherein the first layer has a same thickness in the first section, the second section, and the folding section,
• wherein the third layer comprises a pattern including a plurality of grooves formed on a bonding surface with the second layer at the folding section, and has a hardness greater than a hardness of the second layer, and
• wherein the pattern of the third layer is between the fourth layer and the fifth layer.