Product produced by coating a substrate with an electrically conductive layer
AssigneeSaint-Gobain Vitrage
InventorsVincent Sauvinet, Jean Bletry, Micheline Bonnaud, Maurice Trouve
Life of this patent
Estimating the term…
Abstract
A method for coating a substrate, preferably of glass, with a pyrolyzed transparent, electroconductive layer. The coating is comprised of indium formate, optionally mixed with a powdered or gaseous tin compound or a gaseous organotin compound. The coating layer is deposited upon a hot substrate whereupon it pyrolytically decomposes, forming a layer which is subsequently heat treated in a reducing or an oxidizing atmosphere to optionally enhance the low emissivity and low resistivity of the coating or reduce said low emissivity and low resistivity properties.
Claims8
A plate of glass coated with a layer consisting essentially of indium and tin oxides having zones of a low emissivity and resistivity of less than or equal to 0.15 and 3.times.10.sup.-4 ohm-cm, respectively for a thickness of between about 1800 and 4500 angstroms with at least one other zone wherein the emissivity and resistivity are higher than 0.15 and 3.times.10.sup.-4 ohm-cm, respectively that is produced by:
- preparing a dry metal composition containing indium formate;
- mixing at least a powdered or gaseous tin compound or a gaseous organotin compound with the indium formate in proportions ranging from one to thirty weight percent;
- depositing said composition onto a surface of a heated glass plate so as to pyrolyze the composition;
- and
- heating the coated glass plate to enhance the properties of the layer.
A plate of glass coated with a pyrolyzed metal oxide layer consisting essentially of indium oxide formed by depositing a predetermined amount of a dry, powdered organic indium compound on the heated glass plate, thereby pyrolyzing the indium compound;
- wherein the layer comprises a first zone having an emissivity of less than or equal to 0.15 and a resistivity of less than or equal to 3.times.10.sup.-4 ohm-cm, and a second zone having a emissivity greater than 0.15 and a resistivity greater than 3.times.10.sup.-4 ohm-cm.
Dependencies are inferred from the claim text.