METHOD FOR MANUFACTURING GLASS SUBSTRATE WITH LAMINATED FILM

WIPO Patent Application WO/2014/112415

A1

A method for manufacturing a glass substrate with a laminated film, using a glass manufacturing apparatus which comprises a melting furnace that melts a starting material of glass, a float bath that molds a glass ribbon by floating molten glass on molten metal and an annealing furnace that anneals the glass ribbon, by forming a laminated film on the glass ribbon by the CVD method with multiple injectors provided in the annealing furnace and cutting the glass ribbon. This method is characterized in that the laminated film is composed of two or more layers, the glass substrate has a strain temperature Ts (°C) of 550°C or more, the laminated film is formed at Tg or less when the transition temperature of the glass substrate is Tg (°C), and the drop temperature K1 per unit length of the glass ribbon in a temperature range in which all layers of the laminated film are formed is 0°C/m