摘要 |
<p>The present invention is directed to a low emissivity, low shading coefficient, multi-layer coating (12) and coated article having a luminous transmission of less than about 70 percent, a shading coefficient less than about 0.44 and a solar heat gain coefficient of less than about 0.38 and a ratio of luminous transmittance to solar heat gain coefficient of greater than about 1.85. The coated article, e.g. an IG unit, has a substrate (10) with at least one antireflective layer deposited over the substrate. At least one infrared reflective layer (16) is deposited over the antireflective layer (14) and at least one primer layer (18) is deposited over the infrared reflective layer. Optionally a second antireflective layer (20) is deposited over the first primer layer and optionally a second infrared reflective layer (22) is deposited over the second antireflective layer. Optionally a second primer layer (24) is deposited over the second infrared reflective layer and optionally a third antireflective layer (26) is deposited over the second primer layer, such that the coated article can have the aforementioned optical properties. Also an optional protective overcoat (28), e.g. an oxide or oxynitride of titanium or silicon, and/or solvent soluble organic film former may be deposited over the uppermost antireflective layer.</p> |