Heat treatable coated article with high ratio of transmission over sheet resistance
First Claim
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1. A heat treated coated article comprising:
- a multi-layer coating supported by a glass substrate, wherein the coating comprises at least the following layers from the glass substrate outwardly;
a first layer comprising zinc oxide;
a first layer comprising silver located over and contacting the first layer comprising zinc oxide;
a first layer comprising tin oxide and/or silicon nitride;
a second layer comprising zinc oxide;
a second layer comprising silver; and
a layer comprising tin oxide and/or silicon nitride;
wherein the coated article has a ratio Tvis/Rs of at least 32 after heat treatment (where Tvis is visible transmission (%) and Rs is sheet resistance of the coating in units of ohms/square) and a Δ
E* value (glass side reflective and/or transmissive) of less than or equal to about 5 due to the heat treatment, and wherein the glass substrate and coating thereon after the heat treatment have a visible transmission, measured monolithically, of at least 75%.
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Abstract
A coated article is provided so as to have a fairly high visible transmission (TY or Tvis) to sheet resistance (Rs) ratio (i.e., a ratio Tvis/Rs). The higher this ratio, the better the coated article'"'"'s combined functionality of providing for both good solar performance (e.g., ability to reflect and/or absorb IR radiation) and high visible transmission. In certain example embodiments, coated articles herein may be heat treatable. Coated articles herein may be used in the context of insulating glass (IG) window units, architectural or residential monolithic window units, vehicle window units, and/or the like.
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Citations
14 Claims
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1. A heat treated coated article comprising:
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a multi-layer coating supported by a glass substrate, wherein the coating comprises at least the following layers from the glass substrate outwardly; a first layer comprising zinc oxide; a first layer comprising silver located over and contacting the first layer comprising zinc oxide; a first layer comprising tin oxide and/or silicon nitride; a second layer comprising zinc oxide; a second layer comprising silver; and a layer comprising tin oxide and/or silicon nitride; wherein the coated article has a ratio Tvis/Rs of at least 32 after heat treatment (where Tvis is visible transmission (%) and Rs is sheet resistance of the coating in units of ohms/square) and a Δ
E* value (glass side reflective and/or transmissive) of less than or equal to about 5 due to the heat treatment, and wherein the glass substrate and coating thereon after the heat treatment have a visible transmission, measured monolithically, of at least 75%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification