Appliance with coated transparency
View Patent ↗An appliance transparency, such as an oven transparency, includes at least one substrate and a coating deposited over at least a portion of the substrate. The coating includes at least one metal layer, such as a metallic silver layer. The metal layer can have a thickness in the range of 80 Å to 100 Å and optionally or the coating can have a protective coating deposited thereon.
1. An oven transparency, comprising:
a first panel having a first major surface and a second major surface;
a second panel spaced from the first panel and having a first major surface and a second major surface, with the first major surface of the second panel facing the second major surface of the first panel;
a first coating deposited over at least a portion of the second major surface of the second panel, the first coating consisting essentially of at least one metal oxide layer; and
a second coating deposited over at least a portion of one of the second major surface of the first panel or the first major surface of the second panel, the second coating comprising:
a first dielectric layer comprising at least one transparent metal oxide;
a first metallic layer;
a second dielectric layer comprising at least one transparent metal oxide; and
a second metallic layer; and
a protective coating over the second coating and comprising a mixture of silica and alumina and having a thickness in the range of 100 Å to 50,000 Å.
2. The transparency of claim 1 , wherein the first coating comprises a doped metal oxide layer.
3. The transparency of claim 2 , wherein the first coating comprises fluorine doped tin oxide.
4. The transparency of claim 1 , wherein the first coating is a CVD coating.
5. The transparency of claim 1 , wherein the second coating is an MSVD coating.
6. The transparency of claim 1 , wherein the second coating further comprises:
a third dielectric layer comprising at least one transparent metal oxide; and
a third metallic layer.
7. The transparency of claim claim 1 , wherein the protective coating comprises 85 wt.% to 10 wt.% silica and 15 wt.% to 90 wt.% alumina.
8. An oven transparency, comprising:
a first panel having a first major surface and a second major surface;
a second panel spaced from the first panel and having a first major surface and a second major surface, with the first major surface of the second panel facing the second major surface of the first panel;
a first coating deposited over at least a portion of the second major surface of the second panel, the first coating consisting essentially of fluorine doped tin oxide; and
a second coating deposited over at least a portion of one of the second major surface of the first panel or the first major surface of the second panel, the second coating comprising:
a first dielectric layer comprising at least one transparent metal oxide;
a first metallic layer;
a second dielectric layer comprising at least one transparent metal oxide;
a second metallic layer;
a third dielectric layer comprising at least one transparent metal oxide;
a third metallic layer; and
a protective coating over at least a portion of the second coating, wherein the protective coating comprises 85 wt.% to 10 wt.% silica and 15 wt.% to 90 wt.% alumina and having a thickness in the range of 100 Å to 50,000 Å.