| 摘要 |
The thickness of a rear surface-side inorganic film (9) formed from the same material as that of each of front surface-side inorganic films (11, 13, and 16) and provided at a rear surface side of a resin substrate (10) having a heat resistance is set in a predetermined range with respect to the total thickness of the front surface-side inorganic films (11, 13, and 16) so that the curvature diameter calculated based on the linear elastic modulus, the coefficient of linear expansion, and the thickness of the resin substrate (10); the linear elastic moduli, the coefficients of linear expansion, and the total thickness of the front surface-side inorganic films (11, 13, and 16); and the linear elastic modulus, the coefficient of linear expansion, and the thickness of the rear surface-side inorganic film (9) is 20 mm or more or−20 mm or less. |
