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Glazing assembly comprising a substrate provided with a stack of thin layers for solar protection and/or thermal insulation

  • US 6,582,809 B2
  • Filed: 08/29/2001
  • Issued: 06/24/2003
  • Est. Priority Date: 12/12/1996
  • Status: Expired due to Term
First Claim
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1. A glazing assembly comprising at least one transparent substrate and a stack of thin layers thereon, wherein said stack of thin layers comprises n functional layers having reflection properties in the infrared, in solar radiation or in both, and (n+1) coatings, wherein said coatings comprise one or more layers, at least one of which in made of a dielectric material, said functional layers and said coatings alternating so that each functional layer is placed between two coatings, wherein n≧

  • 1;

    wherein, when the substrate is subjected to a heat treatment selected from the group consisting of toughening, bending and annealing, in order to preserve the optical quality of the stack at least one of the following must be satisfied;

    the coating placed on top of at least one of the functional layers includes at least one baffler layer comprising a material forming a barrier to at least one oxygen and water;

    or at least one absorbent layer comprising a material capable of absorbing the constituent material of the said functional layer or a layer that is stabilizing with respect to the said constituent material forms at least a part of;

    (a) either the coating placed on top of the functional layer or under the barrier layer;

    or (b) the coating placed under the functional layer.

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