Flexible flat device and method of manufacturing flexible substrate structure and flexible flat device

A method of manufacturing a flexible flat device, comprising:

• providing a first loading substrate having a center area and a peripheral area disposed on at least one side of the center area;
• forming a first adhesive layer on the center area of the first loading substrate;
• forming a second adhesive layer on the peripheral area of the first loading substrate;
• adhering a first flexible substrate to the first loading substrate by the first adhesive layer and the second adhesive layer, wherein an adhesive force between the first flexible substrate and the second adhesive layer is stronger than that between the first flexible substrate and the first adhesive layer;
• providing a second loading substrate having a center area and a peripheral area disposed on at least one side of the center area;
• forming a third adhesive layer on the center area of the second loading substrate;
• forming a fourth adhesive layer on the peripheral area of the second loading substrate;
• adhering a second flexible substrate to the second loading substrate by the third adhesive layer and the fourth adhesive layer, wherein an adhesive force between the second flexible substrate and the fourth adhesive layer is stronger than that between the second flexible substrate and the third adhesive layer;
• adhering the first flexible substrate to the second flexible substrate by a fifth adhesive layer to form a flexible substrate structure, wherein an adhesive force between the first flexible substrate and the fifth adhesive layer is stronger than that between the first flexible substrate and the second adhesive layer, and an adhesive force between the second flexible substrate and the fifth adhesive layer is stronger than that between the second flexible substrate and the fourth adhesive layer.
• cutting the flexible substrate structure;
• and
• separating the first flexible substrate and the second flexible substrate from the flexible substrate structure.

A flexible flat device, comprising:

• a first loading substrate having a center area and a peripheral area disposed on at least one side of the center area;
• a first adhesive layer disposed on the center area of the first loading substrate;
• a second adhesive layer disposed on the peripheral area of the first loading substrate;
• a first flexible substrate adhered to the first loading substrate by the first adhesive layer and the second adhesive layer, wherein an adhesive force between the first flexible substrate and the second adhesive layer is stronger than that between the first flexible substrate and the first adhesive layer.
• a second loading substrate disposed oppositely to the first loading substrate, the second loading substrate having a center area and a peripheral area disposed on at least one side of the center area;
• a third adhesive layer disposed on the center area of the second loading substrate;
• a fourth adhesive layer disposed on the peripheral area of the second loading substrate;
• a second flexible substrate adhered to the second loading substrate by the third adhesive layer and the fourth adhesive layer, wherein an adhesive force between the second flexible substrate and the fourth adhesive layer is stronger than that between the second flexible substrate and the third adhesive layer;
• and
• a fifth adhesive layer disposed between the first flexible substrate and the second flexible substrate for adhering the first flexible substrate to the second flexible substrate, wherein an adhesive force between the first flexible substrate and the fifth adhesive layer is stronger than that between the first flexible substrate and the second adhesive layer, and an adhesive force between the second flexible substrate and the fifth adhesive layer is stronger than that between the second flexible substrate and the fourth adhesive layer.