Metal based coating composition and related coated substrates
AssigneePPG Industries Ohio, Inc.
InventorsDennis J. O'Shaughnessy, James J. Finley
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Abstract
A coated substrate is disclosed. The coated substrate includes a substrate and a coating composition over the substrate comprising at least one metal based layer selected from tungsten, chromium, tantalum, molybdenum, aluminum, niobium, and mixtures and alloys thereof; and mixtures and alloys of cobalt and chromium; and at least one dielectric layer including SixNy, where x/y ranges from 0.75 to 1.5, over the metal based layer. The ΔEcmc (1.5:1) (T), ΔEcmc (1.5:1) (R1) and ΔEcmc (1.5:1) (R2) of a non-heat treated, coated substrate as compared to a heat treated, coated substrate according to the present invention are no greater than 8 units.
Claims11
A coated substrate, comprising:
- a. a glass substrate;
- and
- b. a coating composition over the glass substrate, comprising:
- i. at least one metal based layer selected from the group consisting of tungsten, chromium, tantalum, molybdenum, aluminum, an alloy of cobalt and chromium, and mixtures thereof, wherein the at least one metal based layer has a thickness of 3-20 nm ;
- and
- ii. at least one dielectric layer comprising SixNy, where x/y ranges from 0.75 to 1.5, over the metal based layer,
- wherein the dielectric layer is a multiple film configuration comprising (i) a first dielectric film comprising SixNy having an index of refraction;
- (ii) a second dielectric film comprising silicon dioxide over the first dielectric film having an index of refraction lower than the index of refraction of the first dielectric film;
- and (iii) a third dielectric film comprising SixNy over the second film.
A coated substrate comprising:
- a. a glass substrate;
- b. a first dielectric layer over the substrate, wherein the first dielectric layer is a multiple film configuration comprising (i) a first dielectric film comprising SixNy having an index of refraction;
- (ii) a second dielectric film comprising silicon dioxide over the first dielectric film having an index of refraction lower than the index of refraction of the first dielectric film;
- and (iii) a third dielectric film comprising SixNy over the second film;
- c. a metal based layer selected from the group consisting of tungsten, chromium, tantalum, molybdenum, aluminum, an alloy of cobalt and chromium, and mixtures thereof over the first dielectric layer and in contact with the third dielectric film of the first dielectric layer, wherein the at least one metal based layer has a thickness of 3-20 nm;
- and
- d. a second dielectric layer comprising a second SixNy layer, where x/y ranges from 0.75 to 1.5, over the metal based layer.
A coated substrate comprising:
- a. a first dielectric layer over a substrate, wherein the first dielectric layer is a multiple film configuration comprising (i) a first dielectric film comprising SixNy having an index of refraction;
- (ii) a second dielectric film comprising silicon dioxide over the first dielectric film having an index of refraction lower than the index of refraction of the first dielectric film;
- and (iii) a third dielectric film comprising SixNy over the second film;
- b. a first metal based layer over the first dielectric layer, wherein the first metal based layer is selected from the group consisting of tungsten, chromium, tantalum, molybdenum, aluminum, mixtures thereof, alloys thereof, and alloys of cobalt and chromium, wherein the at least one metal based layer has a thickness of 3-20 nm;
- c. an infrared reflective layer over the first metal based layer;
- d. a second metal based layer selected from the group consisting of tungsten, chromium, tantalum, molybdenum, aluminum, an alloy of cobalt and chromium, and mixtures thereof over the infrared reflective layer, wherein the at least one metal layer has a thickness of 3-20 nm;
- and
- e. a second dielectric layer comprising a second SixNy layer, where x/y ranges from 0.75 to 1.5 over the second metal based layer,
- wherein a non-heat treated, coated substrate as compared to a heat treated, coated substrate has a ΔEcmc (1.5:1) (T), a ΔEcmc (1.5:1) (R1) and a ΔEcmc (1.5:1) (R2) no greater than or equal to 8 units.
Dependencies are inferred from the claim text.