Glazing including a stack of thin layers

A material comprising a transparent substrate coated with a stack of thin layers comprising a silver-based functional metal layer and two dielectric coatings, each dielectric coating comprising at least one dielectric layer, so that the functional metal layer is positioned between two dielectric coatings, wherein a lower dielectric coating located below a silver-based functional layer comprises:

• a high-index layer based on metal oxide, exhibiting a refractive index of greater than 2.3 and a thickness of greater than 5 nm,
• an antidiffusion layer based on silicon and/or on aluminum chosen from an oxide, a nitride and an oxynitride layer, located above the high-index layer, exhibiting a thickness of between 1 and 10 nm,
• a high-index layer based on metal oxide exhibiting a refractive index of greater than 2.3 and a thickness of less than 5 nm located above and in contact with the antidiffusion layer and below the silver-based functional layer,
• at least one oxide-based layer located above the antidiffusion layer and exhibiting a different composition from the antidiffusion layer, the at least one oxide-based layer being above and in contact with the high-index layer exhibiting a refractive index of greater than 2.3 exhibiting a thickness of less than 5 nm, a total thickness of the at least one oxide-based layer located above the antidiffusion layer and exhibiting a different composition from the antidiffusion layer being greater than 10 nm.