Patent ID: 8815340
Filing Date: 2014-08-26
Classification: C03C,C23C

Abstract:
1. A process of heat treatment by flame treatment of at least one thin film deposited on a glass substrate, the process comprising: running a glass substrate comprising at least one thin film deposited thereon in a path of a plurality of linear flame treatment devices, wherein each flame treatment device comprises at least one combustion burner and the length of each flame treatment device is less than or equal to a third of the width of the glass substrate, wherein the heat treatment increases at least one selected from the group consisting of a degree of crystallization of the at least one thin film and a size of crystallites in the at least one thin film, and wherein a position of the combustion burner is adjusted so that a maximum transient bending “b” is less than 150 mm and satisfies an equation: wherein: the maximum transient bending, “b”, is a distance, expressed in mm, between a first plane of the substrate without heating, P “d” is a distance between the first plane and the tip of the combustion burner, expressed in mm; and a width of the substrate, “L”, in a direction perpendicular to a direction of the running is greater than or equal to 1.1 m.