Transparent substrate with a stack of thin layers acting on solar and/or infra-red radiation

The invention relates to a transparent substrate (1), particularly enverre, provided with a stack of thin layers comportantessentiellement and sequentially from the substrate: .cndot. a first layer of dielectric material (2) .cndot. a first layer reflection properties (infrared, including metal (3) .cndot. a second layer of dielectric material (4) .cndot. a second layer reflection properties (infrared, including metal (5 ) .cndot. a third layer of dielectric material (6) .cndot. a third layer having reflection properties in (infra-red, in particular metal (7). a fourth layer of dielectric material (8. the thickness of the third layer reflection properties (infrared (7) is greater than that of the second layer's properties reflection gifts (infra-red (5), itself higher than la Première layer properties (infrared ( 3).