In recent years, the weight reductions and thinning of display apparatuses like flat panel displays (FPDs: liquid crystal display apparatuses, organic EL display apparatuses, and the like) have been progressing with the development of visual communication technologies. Glass substrates have been conventionally used as substrates for use in the display apparatuses in many cases. The glass substrates are each excellent in transparency, solvent resistance, gas barrier properties, and heat resistance. However, when one attempts to achieve the thinning of a glass material of which any such glass substrate is formed, the following problem arises. While the weight reduction is achieved and the glass substrate shows excellent flexibility, its impact resistance is insufficient, and hence the glass substrate becomes difficult to handle.
In order that the handleability of thin glass substrates may be improved, substrates in each of which a resin layer is formed on a glass surface have been disclosed (see, for example, Patent documents 1, 2, and 3). Such substrate is produced by attaching a resin film to the glass surface or coating the glass surface with a thermoplastic resin. The substrate thus produced can obtain such a certain effect as to have flexibility.
However, when such substrate is used in a display device or the like, the following problem arises. The substrate is poor in durability against various solvents (such as acetone) to be used upon production of the display device.