Coated glass surfaces and method for coating a glass substrate

An insulating glass unit comprised of:

• at least two substantially parallel, spaced sheets of glass, said two sheets of glass being sealed together at their peripheral edges thereby to define an insulating chamber therebetween,
• a coating applied to a surface of one of said glass sheets within said insulating chamber, wherein said coating comprises a plurality of layers, and wherein the plurality of layers comprises:
• an alloy layer comprising a Nickel-Chromium-Molybdenum alloy, wherein the alloy comprises about 58% or more Ni, about 20 to about 23% Cr, about 8 to about 10% Mo, about 3.15 to about 4.15% Nb+Ta and a maximum of about 5% Fe by weight;
• and
• at least one and no more than two silver layers;
• wherein the insulating glass unit has a bh color coordinate value of about −7 to about −11 as measured in Hunter Lab color space.

A method of coating a substrate, the coating comprising a plurality of layers, wherein at least one of the layers comprises a Nickel-Chromium-Molybdenum alloy material and at least two additional layers comprise silver materials, wherein the alloy material comprises about 58% or more Ni, about 20 to about 23% Cr, about 8 to about 10% Mo, about 3.15 to about 4.15% Nb+Ta and a maximum of about 5% Fe by weight, and wherein the coated substrate has a bh color coordinate value of about −7 to about −11 as measured in Hunter Lab color space, the method comprising:

• applying a layer comprising the Nickel-Chromium-Molybdenum alloy material by sputtering;
• applying a first silver layer of the at least two additional silver layers by sputtering;
• and
• applying a second layer of the at least two additional silver layers by sputtering.