Heat treatable sputter-coated glass

• US 5,242,560 A
• Filed: 07/26/1991
• Issued: 09/07/1993
• Est. Priority Date: 03/09/1989
• Status: Expired due to Term

• Current Assignee: Guardian Glass LLC (KOCH Industries Incorporated)
• Original Assignee: Guardian Industries Corporation (KOCH Industries Incorporated)
• Inventors: Lingle, Philip J., Nalepka, Raymond
• Primary Examiner(s): NGUYEN, NAM X
• Application Number:
  US07/736,581
• Time in Patent Office: 774 Days
• Field of Search: 204/192.26, 204/192.27, 204/192.28, 204/192.15, 427/163
• US Class Current: 204/192.27
• CPC Class Codes: C03C 17/36 at least one coating being a metal
• CPC Class Codes: C03C 17/3605 Coatings of the type glass/metal/inorganic compound
• CPC Class Codes: C03C 17/3613 Coatings of type glass/inorganic compound/metal/inorganic compound/metal/other
• CPC Class Codes: C03C 17/3618 Coatings of type glass/inorganic compound/other inorganic layers, at least one layer being metallic
• CPC Class Codes: C03C 17/3649 made of metals other than silver
• CPC Class Codes: C03C 17/3652 the coating stack containing at least one sacrificial layer to protect the metal from oxidation
• CPC Class Codes: C03C 17/366 Low-emissivity or solar control coatings
• CPC Class Codes: C03C 17/3681 the multilayer coating being used in glazing, e.g. windows or windscreens
• CPC Class Codes: C03C 2217/78 Coatings specially designed to be durable, e.g. scratch-resistant
• CPC Class Codes: C23C 14/086 of zinc, germanium, cadmium, indium, tin, thallium or bismuth
• CPC Class Codes: C23C 14/185 by cathodic sputtering
• CPC Class Codes: G02B 1/10 Optical coatings produced by application to, or surface treatment of, optical elements G02B1/08 takes precedence

Abstract

A heat treatable sputter-coated glass having on its glass substrate a coating system consisting essentially of a high nickel alloy overcoated with tin oxide and, optionally, undercoated with tin oxide with, or without, a layer of metallic aluminum located between the high nickel alloy layer and the overcoat of tin oxide.

Claims

1. In a method of forming a heat treated glass article useful as an automotive or architectural window, the improvement comprising:

coating on the surface of said glass article prior to heat treatment a coating system capable of withstanding temperatures of from about 1150°

F.-1450°

F. for from about 2-30 minutes without significant degradation of color, durability, chemical resistance, emissivity, reflectance and transmittance as these characteristics are defined in terms of an automotive or architectural window, said coating system consisting of a metallic oxide overcoat layer consisting essentially of stoichiometric tin oxide, and an intermediate metallic layer consisting essentially of nickel or a Ni-Cr-Fe alloy having about 70-90% by weight nickel; and

thereafter,

subjecting said coated glass article to a heat treatment selected from bending, heat strengthening, tempering or combinations thereof at about 1150°

F.-1450°

F. for from about 2-30 minutes without significant degradation of color, durability, chemical resistance, emissivity, reflectance and transmittance as these characteristics are defined in terms of an automotive or architectural window.

2. In the method of claim 1 wherein said coating step is conducted by sputter-coating said layers sequentially onto said glass article.

3. In the method of claim 2 the improvement wherein the metallic layer consists essentially of, by weight:

about 76% Ni, about 4% Fe, about 16% Cr, less than about 0.5% C, about 5% Al, and about 0.01% Y.

4. In the method of claim 3 the improvement wherein the metallic layer consists essentially of, by weight:

space="preserve" listing-type="tabular">______________________________________ Element % ______________________________________ Ni about 75.45 Fe about 4.00 Cr about 16.00 C about .04 Al about 4.50 Y about 0.01 ______________________________________

5. In a method of forming a heat treated glass article useful as an automotive or architectural window, the improvement comprising:

coating on the surface of said glass article prior to heat treatment a coating system capable of withstanding temperatures of from about 1150°

F.-1450°

F. for from about 2-30 minutes without significant degradation of color, durability, chemical resistance, emissivity, reflectance and transmittance as these characteristics are defined in terms of an automotive or aarchitectural window, said coating system consisting of a metallic oxide undercoat layer consisting essentially of stoichiometric tin oxide, a metallic overcoat layer consisting essentially of stoichiometric tin oxide, and an intermediate metallic layer consisting essentially of nickel or a Ni-Cr-Fe alloy having about 70-90% by weight nickel; and

thereafter,

subjecting said coated glass article to a heat treatment selected from bending, heat strengthening, tempering or combinations thereof at about 1150°

F.-1450°

F. for from about 2-30 minutes without significant degradation of color, durability, chemical resistance, emissivity, reflectance and transmittance as these characteristics are defined in terms of an automotive or architectural window.

6. In the method of claim 5 wherein said coating step is conducted by sputter-coating said layers sequentially onto said glass article.

7. In the method of claim 6 the improvement wherein the metallic layer consists essentially of, by weight:

about 76% Ni, about 4% Fe, about 16% Cr, less than about 0.5% C, about 5% Al, and about 0.01% Y.

8. In the method of claim 7 the improvement wherein the metallic layer consists essentially of, by weight:

space="preserve" listing-type="tabular">______________________________________ Element % ______________________________________ Ni about 75.45 Fe about 4.00 Cr about 16.00 C about .04 Al about 4.50 Y about 0.01 ______________________________________