摘要:
The invention provides a substrate (1) with a film (5), in which functional particles are dispersed, and whose transparency is maintained even when heated. The film (5) includes a matrix including an alkali metal oxide and a silicon oxide, and functional particles dispersed in the matrix is formed on a substrate. The alkali metal oxide includes at least sodium, and lithium and/or potassium. A mole ratio R 2 O/SiO 2 of the alkali metal oxide to the silicon oxide included in the film is in a range of 17/100 to 22/100. The haze ratio of this substrate with a film stays low even when heated.