Patent ID: 8780568

Claim:
A flexible display device comprising: a device substrate including a flexible substrate, and a display unit and a first terminal part which are formed above the flexible substrate; a flexible circuit substrate including a second terminal part; and an anisotropic conductive film including conductive particles and connecting the first terminal part electrically and physically to the second terminal part, wherein an electrode layer and a cushioning layer are provided between the flexible substrate and the first terminal part, each of the conductive particles consists substantially of a core part and a metal layer which covers the core part, a sum of a product of average particle diameter and elastic modulus for the core part, and a product of double average thickness and elastic modulus for the metal layer, is a first sum value, a sum of a product of average thickness and elastic modulus for the first terminal part, a product of average thickness and elastic modulus for the cushioning layer, and a product of average thickness and elastic modulus for the electrode layer, is a second sum value, and a quotient value of the first sum value divided by the second sum value is no greater than 1.5.