Insulating glass (IG) window unit including heat treatable coating with specific color characteristics and low sheet resistance
AssigneesGuardian Industries Corp., Centre Luxembourgeois de Recherches pour le Verre et la Ceramique S.A. (C.R.V.C.)
InventorsBryce Corsner, Nancy Bassett, Anton Dietrich, Jose Nunez-Regueiro
Life of this patent
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Abstract
An insulating glass (IG) window unit, or other suitable window unit, includes a glass substrate with a coating thereon. The coating includes a lower contact layer based on zinc oxide and/or at least one silicon nitride inclusive layer that is Si-rich (i.e., non-stoichiometric). Using such a design, it has been found that coloration can be adjusted in order to achieve certain desirable optical characteristics.
Claims13
An insulating glass (IG) window unit comprising:
- first and second glass substrates spaced apart from one another so that a space is provided therebetween, at least the first glass substrate being thermally tempered and supporting a coating, wherein the coating consists essentially of:
- a first dielectric layer comprising silicon nitride,
- a lower contact layer comprising zinc oxide over and contacting the first dielectric layer comprising silicon nitride,
- a layer comprising Ag over and contacting the lower contact layer comprising zinc oxide,
- an upper contact layer comprising Ni and/or Cr, wherein the layer comprising Ag is located between and directly contacts each of said upper and lower contact layers, and
- a second dielectric layer comprising silicon nitride located over and contacting the upper contact layer comprising Ni and/or Cr,
- wherein the coating includes only one layer based on Ag, and wherein the IG window unit has a SHGC of no greater 0.55, a visible transmission of at least about 68%, transmissive a* color of from −5.5 to 0.0, transmissive b* color of from +0.5 to +3.5, glass side reflective a* color of from −4.0 to +2.0, and glass side reflective b* color of from −4.0 to +3.0.
An insulating glass (IG) window unit comprising:
- first and second glass substrates spaced apart from one another so that a space is provided therebetween, at least the first glass substrate supporting a coating and being thermally tempered, wherein the coating consists essentially of:
- a first dielectric layer comprising silicon nitride,
- a lower contact layer comprising zinc oxide over and contacting the first dielectric layer comprising silicon nitride,
- a layer comprising Ag over and contacting the lower contact layer,
- an upper contact layer comprising Ni and/or Cr, wherein the layer comprising Ag is located between and directly contacts each of said upper and lower contact layers, and
- a second dielectric layer comprising silicon nitride over and contacting the upper contact layer comprising Ni and/or Cr,
- wherein the coating includes only one layer based on Ag, and wherein the IG window unit after heat treatment has a SHGC of no greater 0.55, glass side reflective a* color of from −3.0 to +1.0, glass side reflective b* color of from −3.0 to +1.5.
Dependencies are inferred from the claim text.