Adhesion layer for metal oxide UV filters
AssigneeGeneral Electric Company
InventorCharles Dominic Iacovangelo
Life of this patent
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Abstract
An adhesion promoting layer is formed between a transparent substrate and a metal oxide layer to prevent the metal oxide layer from delaminating from the substrate. Preferably, the substrate is a transparent polycarbonate, the adhesion promoting layer is a thin, transparent Al or Ag layer, and the metal oxide layer is ZnO, AZO or IZO UV radiation absorption layer. The layers are preferably deposited by arc plasma deposition or by sputtering.
Claims38
A multilayer structure, comprising:
- a polymeric substrate;
- a transparent metal layer on the substrate;
- and
- a transparent metal oxide layer including at least one compound selected from the group consisting of ZnO, indium doped zinc oxide, and aluminum doped zinc oxide,
- wherein the metal oxide layer is in direct contact with the metal layer, and the adhesion strength between the metal oxide layer and the substrate is
- a) 2.07 MPa or greater;
- and
- b) decreases by no more than 10% after being submerged for 4 days in distilled water at 65 degrees C.
A method of coating a polymeric substrate, comprising the steps of:
- forming a transparent metal layer over the substrate;
- and
- forming a transparent metal oxide layer including at least one compound selected from the group consisting of ZnO, indium doped zinc oxide, and aluminum doped zinc oxide,
- wherein the metal oxide layer is in direct contact with the metal layer, and the adhesion strength between the metal oxide layer and the substrate is
- a) 2.07 MPa or greater;
- and
- b) decreases by no more than 10% after being submerged for 4 days in distilled water at 65 degrees C.
A transparent window usable in a vehicle, a building, a display device or an apparatus, comprising
- a polycarbonate, polyestercarbonate, polyethersulfone or polyetherimide substrate;
- an infrared radiation reflection layer comprising aluminum or silver;
- and
- an ultraviolet radiation absorption layer including at least one compound selected from the group consisting of ZnO, indium doped zinc oxide, and aluminum doped zinc oxide,
- wherein the ultraviolet radiation absorption layer is in direct contact with the infrared radiation reflection layer, and the adhesion strength between the ultraviolet radiation absorption layer and the substrate is
- a) 2.07 MPa or greater;
- and
- b) decreases by no more than 10% after being submerged for 4 days in distilled water at 65 degrees C.
Dependencies are inferred from the claim text.