Protective layer on a conductive substrate
AssigneeSaint-Gobain Vitrage International
InventorsPierre Balian, Georges Zagdoun, Maurice Trouve
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Abstract
The present invention relates to a product containing a glass substrate and a transparent conductive layer made of sub-stoichiometric metallic oxide coated with a metallic oxide overlayer protecting the conductive layer from oxidation. The indices of refraction of the two layers and the geometric thickness of the overlayer may be selected so as to offer a product which has a neutral color under reflection. The invention also concerns processes for obtaining said product.
Claims32
A process for manufacturing a product comprising a glass substrate, a transparent conductive layer of an oxygen substoichiometric metallic oxide on said glass substrate and a metallic oxide overlayer which protects the conductive layer from oxidation on said oxygen substoichiometric metallic oxide, comprising:
- a) depositing said conductive layer in its oxygen substoichiometric state on said glass substrate, and
- b) depositing said metallic oxide overlayer on said conductive layer while the metallic oxide of said conductive layer is in its oxygen substoichiometric state,
- said step b) not involving any reducing step of said conductive layer,
- thereby preserving the oxygen substoichiometry of the conductive layer.
Dependencies are inferred from the claim text.