Heat treatable, durable, ir-reflecting sputter-coated glasses and method of making same
AssigneeGuardian Industries Corp.
InventorsKlaus W. Hartig, Philip J. Lingle
Life of this patent
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Abstract
A heat treatable, durable and chemically resistant layer system for glasses used for automotive and architectural purposes includes a metallic layer of nickel or alloy thereof overcoated with silicon nitride (Si.sub.3 N.sub.4). The layer system may include an undercoat of silicon nitride (Si.sub.3 N.sub.4) and the metallic layer may also include silicon nitride. The metallic layer may be partially oxidized or surrounded by layers of stoichiometric oxides of the metal. The metallic layer, however, should not contain a nitride.
Claims36
A glass article which includes a glass substrate having thereon a sputter-coated layer system consisting essentially of from the glass substrate outward, (a) at least one substantially metallic layer which includes nickel or a nickel alloy;
- and (b) a layer of silicon nitride (Si.sub.3 N.sub.4);
- and wherein the layers are each of sufficient thickness such that when the glass substrate has a thickness of about 1.5 mm-13 mm and has the said layer system thereon the so-layered glass article is heat treatable, and has a visible transmittance of about 1-80% and a normal emissivity (E.sub.n) of about 0.10-0.60.
A glass article according to claim 5 wherein said layer system includes an undercoat layer of silicon nitride (Si.sub.3 N.sub.4) located between said substantially metallic layer and said glass substrate.
A glass article which includes a glass substrate having thereon a sputter-coated layer system comprising from the glass substrate outward, (a) a layer comprised of a mixture of silicon nitride (Si.sub.3 N.sub.4) and nickel or a nickel alloy having at least 10% by wt. Ni;
- and (b) an overcoat layer consisting essentially of silicon nitride (Si.sub.3 N.sub.4) and wherein the layers are each substantially continuous and of sufficient thickness such that when the glass substrate has a thickness of about 1.5 mm-13 mm and has the aforesaid layer system thereon the so-layered glass article is heat treatable, durable, chemically resistant, and has a visible transmittance of about 1-80% and a normal emissivity (E.sub.n) of about 0.10-0.60.
Dependencies are inferred from the claim text.