Method of converting coated glass

A method of forming a heat-treated thin, durable, solar management layering system onto a glass substrate from the glass outwardly, the steps including:

• a) sputter coating in a nitrogen-containing atmosphere an undercoat layer of Si.sub.3 N.sub.4 ;
• b) sputter coating in an inert gas-containing atmosphere a first layer of nickel or nichrome, said first nickel or nichrome layer having a thickness greater than about 20 .ANG. thick;
• c) sputter coating in an inert gas-containing atmosphere a layer of silver;
• d) sputter coating in an inert gas-containing atmosphere a second layer of nickel or nichrome, said second layer of nickel or nichrome being about 7-15 .ANG. thick;
• e) sputter coating in a nitrogen containing atmosphere an overcoat layer of Si.sub.3 N.sub.4 ;
• and thereafter
• heat-treating said coated glass wherein said heat-treating is selected from tempering, bending or heat treating;
• and wherein said heat-treated, sputter coated glass has the following characteristics after said heat-treatment when said glass substrate is clear glass and has a thickness of about 2.5-3.5 mm:
• Transmittance (Ill. C. 10.degree. obs.) about 76%-78%
• Sheet Resistance (R.sub.s) less than about 12 ohms/sq
• Emissivity, normal (E.sub.n) less than about 0.12
• Emissivity, hemispherical (E.sub.h) less than about 0.16.