LOW-E GLASS COATING SYSTEM AND INSULATING GLASS UNITS MADE THEREFROM

摘要

A sputter-coated glass layer system particularly useful in insulating glass units ("IGs"), which includes a single layer of silver having a thickness of about 115.ANG. - 190.ANG. located between two layers of nickel or nichrome having a thickness of 7.ANG. or less, and provided with an undercoat and an overcoat of Si3N4 having thicknesses of about 450.ANG. - 600.ANG. and about 580.ANG. - 800.ANG. respectively, such that a glass so coated achieves normal emissivity values (En's) of less than about 0.07 and good durability without acquiring a mirror-like and highly purple appearance.