Display device and the method for manufacturing of the same

A display device includes an array substrate (10) having a display area (AA) and a non-display area (NA) positioned outside the display area (AA) and having a light-emitting array (120), and a sealing structure (30) disposed on the array substrate (10), wherein the sealing structure (30) seals the light-emitting array (120), and fixes a plate-shaped reinforcing substrate (40) facing toward the sealing structure (30) to the array substrate (10). In this connection, the sealing structure (30) includes a first adhesive layer (31) facing toward the array substrate (10), a second adhesive layer (32) facing toward the reinforcing substrate (40), and a barrier layer (33) disposed between the first adhesive layer (31) and the second adhesive layer (32). Thus, the sealing structure (30) has a thickness greater than a critical thickness to prevent a process defect in a single layer made of an adhesive material. Due to this sealing structure (30), a decrease in reliability for fixing the reinforcing substrate (40) havin