Hydrophilic reflective article
2 Assignments
0 Petitions
Accused Products
Abstract
A composite article, in particular, a rear-view mirror for a motor vehicle, comprising a substrate generally made of glass, a reflective layer composed of an oxidized or nitrided metal, possibly in an under-stoichiometric state disposed on either the front face or the rear face, and a coating stack disposed on the front face. The coating stack comprises a layer having generally photocatalytic properties, preferably a titanium dioxide based layer, which may be covered by a fine hydrophilic layer. The coating stack may also comprise a barrier sub-layer. Preferably the hydrophilic layer and barrier sub-layer are composed of silicon oxide. A process for forming the composite article includes sputter deposition of various layers followed by heat treatment. Advantageously the article has an attenuated reflection which can vary between 40% and 75%.
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Citations
36 Claims
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1-19. -19. (canceled)
- 20. Composite article comprising a substrate, a reflective layer and a titanium dioxide-based photocatalytic layer, said article being characterized in that the reflective layer is composed of an oxidized or nitrided metal such that the total light reflection integrated over the entire visible range of the composite article is in the range of between 40 and 75%.
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32. Process for preparing a composite article, characterized in that it comprises the following steps:
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depositing a lightly oxidized or nitrided metal layer on one or other of the faces of a support by cathodic magnetron sputtering in a controlled reactive atmosphere;
depositing a photocatalytic layer (40) on the front face of the support by cathodic magnetron sputtering;
thermal treating for a period of between 15 minutes to 6 hours (i) at a temperature in the range of between 300 and 500°
C., or(ii) at a temperature in the range of between 350 and 450°
C. - View Dependent Claims (33, 34, 35)
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Specification