SUBSTRATE PROVIDED WITH A STACK HAVING THERMAL PROPERTIES Russian patent published in 2018 - IPC C03C17/36 

FIELD: optics.

SUBSTANCE: invention relates to a transparent substrate comprising a stack of thin layers and used for manufacturing thermal insulation glazing and/or sun protection. Transparent substrate comprises three metallic functional layers and four antireflective coatings. Each antireflective coating comprises at least one dielectric layer. Each metallic functional layer is located between two antireflective coatings. Thickness of the metallic functional layers, starting from the substrate, increases as a function of the distance from the substrate. Second metallic functional layer is directly in contact with a blocking layer, chosen from a blocking underlayer and a blocking overlayer. Second blocking underlayer and/or the second blocking overlayer exhibits a thickness of greater than 1 nm. Stack comprises at least one blocking layer located in contact with the first metallic functional layer and a third blocking layer located in contact with the third metal functional layer. First, second, third blocking layers respectively have thicknesses CB1, CB2, CB3 satisfying the following equation: CB1 + CB3 <1, 1 CB2 with at least the non-zero thickness CB2.

EFFECT: technical result is a decrease in the solar factor, an increase in the light transmission.

15 cl, 7 dwg, 4 tbl