APPLIANCE WITH COATED TRANSPARENCY

• US 20070275253A1
• Filed: 05/15/2007
• Published: 11/29/2007
• Est. Priority Date: 05/30/2003
• Status: Active Grant

• Current Assignee: Vitro Flat Glass LLC (Compagnie De Saint-Gobain)
• Original Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Inventors: THIEL, JAMES, VOELTZEL, CHARLES, FINLEY, JAMES
• Granted Patent: US 7,556,868 B2
• Time in Patent Office: Days
• US Class Current: 428/432
• CPC Class Codes: B32B 15/09 comprising polyesters
• CPC Class Codes: B32B 17/06 comprising glass as the main or only constituent of a layer, next to another layer of a specific material
• CPC Class Codes: B32B 17/10018 comprising only one glass sheet
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 2307/412 Transparent
• CPC Class Codes: B32B 2307/754 Self-cleaning
• CPC Class Codes: B32B 2509/00 Household appliances
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: C03C 17/36 at least one coating being a metal
• CPC Class Codes: C03C 17/3639 Multilayers containing at least two functional metal layers
• CPC Class Codes: C03C 17/3644 the metal being silver
• CPC Class Codes: C03C 17/3686 the multilayer coating being used for ovens
• CPC Class Codes: C03C 2218/365 Coating different sides of a glass substrate
• CPC Class Codes: F24C 15/04 with transparent panels
• CPC Class Codes: Y10T 428/12 All metal or with adjacent metals
• CPC Class Codes: Y10T 428/265 1 mil or less
• CPC Class Codes: Y10T 428/31678 Of metal

Abstract

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.

Claims

1-51. -51. (canceled)

51. An appliance transparency, comprising:

a transparency having a first surface and a second surface;

a first coating formed over at least a portion of the first surface, the first coating comprising at least one metal oxide layer;

a second coating formed over at least a portion of the second surface, the second coating comprising;

at least one dielectric layer;

a first metallic layer; and

a second metallic layer; and

a protective coating formed over at least a portion of the second coating, wherein the protective coating comprises a first layer and a second layer, and wherein the first layer comprises alumina and the second layer comprises a mixture of alumina and silica.

52. The transparency of claim 51, wherein the transparency comprises one or more substrates, and wherein the first surface and the second surface are on different substrates.

53. The transparency of claim 51, wherein the transparency comprises one or more substrates, and wherein the first surface and the second surface are on the same substrate.

54. The transparency of claim 51, wherein the first coating comprises a doped metal oxide.

55. The transparency of claim 54, wherein the first coating comprises fluorine doped tin oxide.

56. The transparency of claim 51, wherein at least one of the metallic layers of the second coating includes at least one metal selected from the group consisting of gold, copper, silver, aluminum, or mixtures, alloys, or combinations thereof.

57. The transparency of claim 51, wherein the at least one dielectric layer of the second coating includes at least one material selected from metal oxides, oxides of metal alloys, doped metal oxides, nitrides, oxynitrides, and mixtures thereof.

58. The transparency of claim 51, wherein the second coating comprises:

a first dielectric layer;

the first metallic layer deposited over the first dielectric layer;

a second dielectric layer deposited over the first metallic layer;

the second metallic layer deposited over the second dielectric layer;

a third dielectric layer deposited over the second metallic layer film; and

the third metallic layer deposited over the third dielectric layer.

59. The transparency of claim 51, wherein the first coating further comprises at least one metallic layer and a protective coating formed over at least a portion of the first coating, and wherein the protective coating comprises a first layer comprising alumina and a second coating comprising a mixture of alumina and silica.

60. The transparency of claim 59, wherein the metallic layer of the first coating includes at least one metal selected from the group consisting of gold, copper, silver, aluminum, or mixtures, alloys, or combinations thereof.

61. The transparency of claim 51, wherein the first layer of the protective coating consists essentially of alumina.

62. The transparency of claim 61, wherein the second layer of the protective coating comprises greater than 70 wt. % silica.

63. The transparency of claim 61, wherein the second layer of the protective coating comprises greater than 80 wt. % silica.

64. An appliance transparency, comprising:

a transparency having a first surface and a second surface;

a first coating formed over at least a portion of the first surface, the first coating comprising fluorine doped tin oxide;

a second coating formed over at least a portion of the second surface, the second coating comprising;

a first dielectric layer;

a first metallic layer;

a second dielectric layer; and

a second metallic layer; and

a protective coating formed over at least a portion of the second coating, wherein the protective coating comprises a first layer and a second layer, and wherein the first layer consists essentially of alumina and the second layer consists essentially of a mixture of alumina and silica.

65. The transparency of claim 64, wherein the transparency comprises one or more substrates, and wherein the first surface and the second surface are on different substrates.

66. The transparency of claim 64, wherein the transparency comprises one or more substrates, and wherein the first surface and the second surface are on the same substrate.

67. The transparency of claim 64, wherein the second coating further comprises:

a third dielectric layer deposited over the second metallic layer film; and

the third metallic layer deposited over the third dielectric layer.

68. The transparency of claim 64, wherein the second layer of the protective coating comprises greater than 80 wt. % silica.

69. An appliance transparency, comprising:

a transparency having a first surface and a second surface;

a first coating formed over at least a portion of the first surface, wherein the first coating comprises at least one dielectric layer, at least one metallic layer comprising silver, and a protective coating formed over at least a portion of the first coating, and wherein the protective coating comprises a first layer consisting essentially of alumina and a second coating consisting essentially of a mixture of alumina and silica;

a second coating formed over at least a portion of the second surface, the second coating comprising;

a first dielectric layer;

a first metallic layer;

a second dielectric layer; and

a second metallic layer, wherein the first and second metallic layers each comprise silver; and

a protective coating formed over at least a portion of the second coating, wherein the protective coating comprises a first layer and a second layer, and wherein the first layer consists essentially of alumina and the second layer consists essentially of a mixture of alumina and silica.

70. The transparency of claim 69, wherein the transparency comprises one or more substrates, and wherein the first surface and the second surface are on the same substrate.