Display device and its manufacture method and display device supporting base material polyimide film and its manufacture method

The present invention, which provides one kind, can carry out slim, light weight, flexibilityization, the problem of without crack caused by thermal stress, stripping, the excellent display device such as dimensional stability.A kind of display device, it is characterized in that, possesses gas barrier layer in the supporting base material comprising polyimide film, the transmitance of 440nm~780nm of polyimide film wavelength region is more than 80%, and thermal coefficient of expansion be below 15ppm/K, and and gas barrier layer thermal coefficient of expansion difference be below 10ppm/K.