Heat treatable sputter-coated glass

• US 5,188,887 A
• Filed: 05/18/1992
• Issued: 02/23/1993
• 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: Linge, Philip J., Nalepka, Raymond
• Primary Examiner(s): Robinson, Ellis P.
• Assistant Examiner(s): TURNER, ARCHENE A
• Application Number:
  US07/884,009
• Time in Patent Office: 281 Days
• Field of Search: 428/432, 428/433, 428/216, 428/472, 428/697, 428/699, 428/701, 428/702, 359/358, 359/359, 359/580
• US Class Current: 428/216
• 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
• CPC Class Codes: Y10T 428/24975 No layer or component greater than 5 mils thick

Abstract

A heat treatment 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. A coated glass article capable of being formed into an automotive or architectural window which includes being heat treated at a temperature 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 bout 70-90% by weight nickel.

2. A coated glass article according to claim 1 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.

3. A coated glass article according to claim 2 wherein said 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 ______________________________________

4. A coated glass article according to claim 1 wherein said glass is a float glass sheet having a thickness of about 3/32"-1/2", said metallic layer has a thickness of about 150Å

and said overcoat layer has a thickness of about 160Å

.

5. A coated glass article capable of being formed into an automotive or architectural window which includes being heat treated at a temperature 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 undercoat layer consisting essentially of stoichiometric tin oxide, 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.

6. A coated glass article according to claim 5 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.

7. A coated glass article according to claim 6 wherein said 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 ______________________________________

8. A coated glass article according to claim 5 wherein said glass is a float glass sheet having a thickness of about 3/32"-1/2", said metallic layer has a thickness of about 150Å

, and said overcoat layer has a thickness of about 160Å and

said undercoat layer has a thickness of about 160Å

.