Heat treatable sputter-coated glass systems

• US 5,229,194 A
• Filed: 12/09/1991
• Issued: 07/20/1993
• Est. Priority Date: 12/09/1991
• 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, Hartig, Klaus W.
• Primary Examiner(s): TURNER, ARCHENE A
• Application Number:
  US07/804,017
• Time in Patent Office: 589 Days
• Field of Search: 428/216, 428/432, 428/433, 428/467, 428/472, 428/698, 428/699, 428/701, 428/697, 428/702, 428/913, 359/359, 359/360, 359/580, 359/589
• US Class Current: 428/216
• CPC Class Codes: C03C 17/36 at least one coating being a metal
• CPC Class Codes: C03C 17/3615 Coatings of the type glass/metal/other inorganic layers, at least one layer being non-metallic
• 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 17/3626 one layer at least containing a nitride, oxynitride, boronitride or carbonitride
• CPC Class Codes: C03C 17/3649 made of metals other than silver
• 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 14/085 of iron group metals
• 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: C23C 14/568 Transferring the substrates through a series of coating stations C23C14/562 takes precedence
• CPC Class Codes: C23C 14/58 After-treatment
• CPC Class Codes: C23C 14/5806 Thermal treatment
• CPC Class Codes: Y10S 428/913 Material designed to be responsive to temperature, light, moisture
• CPC Class Codes: Y10T 428/24975 No layer or component greater than 5 mils thick

Abstract

A heat treatable sputter-coated layer system for glass substrates may be applied before heat treatment if the layer system includes a metallic layer of nickel or a high nickel content alloy covered by a separate layer of metallic silicon or an oxide of nickel or the high nickel content alloy, which in turn is covered by a protective metal oxide such as stoichiometric Sn O₂.

Claims

1. A heat treatable glass article comprised of a glass substrate having thereon a coating which includes:

a) a first layer having a thickness of abut 5-100Å and

comprised of an oxide or nitride of a metal selected from the group consisting of nickel and a nickel alloy having at least about 50% by weight nickel;

b) a second layer having a thickness of abut 20-250Å and

comprised of a metal selected from the group consisting of nickel and a nickel alloy having at least about 50% by weight nickel;

c) a third layer having a thickness of about 5-100Å and

comprised of an oxide or nitride of a metal selected from the group consisting of nickel and a nickel alloy having at least about 50% by weight nickel; and

d) a fourth layer having a thickness of about 20-1000Å and

comprised of an oxide of a metal selected from the group consisting of tin, zinc, titanium and alloys thereof.

2. A heat treatable glass article comprised of a glass substrate having thereon a coating which includes:

a) a first layer having a thickness of about 1-1000Å and

comprised of an oxide of a metal selected from the group consisting of tin, zinc, titanium and alloys thereof.

b) a second layer having a thickness of about 5-100Å and

comprised of an oxide or nitride of a metal selected from the group consisting of nickel and a nickel alloy having at least about 50% by weight nickel;

c) a second layer having a thickness of abut 20-250Å and

comprised of a metal selected from the group consisting of nickel and a nickel alloy having at least about 50% by weight nickel;

d) a fourth layer having a thickness of about 5-100Å and

comprised of an oxide or nitride of a metal selected from the group consisting of nickel and a nickel alloy having at least about 50% by weight nickel; and

A fifth layer having a thickness of about 20-1000Å and

comprised of an oxide of a metal selected from the group consisting of tin, titanium and alloys thereof.

3. A heat treatable glass article according to claim 2 wherein said first and fifth layers consist essentially of tin oxide.

4. A heat treatable lass article according to claim 2 wherein the metal of said second, third and fourth layers is the same metal.

5. A heat treatable glass article according to claim 4 wherein the first and fifth layers consist essentially of stoichiometric tin oxide.

6. A heat treatable glass article according to claim 5 wherein said metal of said second, third, and fourth layers consists essentially of an alloy having greater than about 70% Ni by weight.

7. A heat treatable glass article according to claim 2 wherein said first and fifth layers consist essentially of stoichiometric tin oxide, said third layer consists essentially of an alloy comprised of Ni, Fe, Cr, C, Al and Y, and said second and fourth layers consist essentially of an oxide of said alloy of the third layer.

8. A heat treatable glass article according to claim 6 wherein said alloy of said third layer consists essentially of:

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

9. A heat treatable glass article according to claim 2 wherein said glass substrate is green tinted float glass.

10. A heat treatable sputter-coated glass article comprising a glass substrate having thereon a layer system which includes:

a) a substantially-oxidized metallic layer (a) formed of nickel or a nickel alloy having greater than about 50% by weight nickel and having a thickness of about 20-250Å

;

b) a metallic oxide protective layer (b) wherein the metal in the metallic oxide is different than the metal in layer (a) and having a thickness of about 20-1000Å

; and

c) a separate layer (c) intermediate layers (a) and (b) consisting essentially of metallic silicon or a metallic oxide or nitride wherein the metal in the metal oxide or nitride is nickel or a nickel alloy having greater than about 50% by weight nickel, and wherein layer (c) tightly bonds layer (a) to layer (b) and has a thickness of about 5-100Å

.

11. A heat treatable sputter-coated glass article according to claim 10 wherein the metal in the oxide of said layer (c) is the same metal as in layer (a).

12. A heat treatable sputter-coated glass article according to claim 11 wherein said layer (b) consists essentially of stoichiometric tin oxide (Sn O₂).

13. A heat treatable sputter-coated glass article according to claim 12 which further includes layers (d) and (e), wherein layer (c) is a metallic oxide or nitride of nickel or a nickel alloy having greater than about 50% by weight nickel, and wherein layer (e) has a thickness of about 1-1000Å

and is the same metallic oxide as layer (b), and layer (d) has a thickness of about 5-100Å and

is the same metallic oxide or nitride as layer (c), and wherein layer (e) bonds layer (d) tightly to said glass substrate, and layer (d) bonds layer (e) tightly to layer (a).

14. A heat treatable sputter-coated glass article according to claim 13 wherein said article is a vehicular privacy window.