Abstract: Reactive gases providing a coating on a substrate by CVD are made to meet in counterflow, in order to ensure, by the turbulence effect, that there is an almost instantaneous mixing of the reagents. The movement of the gases before contact is ensured by two pipes containing baffles, the effect of which is to cause the gases to rotate in opposite directions to one another.

Abstract: Reactive gases providing a coating on a substrate by CVD are made to meet in counterflow, in order to ensure, by the turbulence effect, that there is an almost instantaneous mixing of the said reagents. The movement of the gases before contact is ensured by two pipes containing baffles, the effect of which is to cause the gases to rotate in opposite directions to one another. Application to the coating of glass with transparent conductive SnO.sub.2.

Abstract: The apparatus comprises a nozzle (2) having three converging tuyeres (3, 4, 5) which project the reagents (SnCl.sub.4 and H.sub.2 O) in the gaseous phase onto the substrate to be plated. Deflector members (6a, 6b), which are adapted to channel the gases between themselves and the substrate, extend on either side of the nozzle (2). The surface (51) of the deflector member (12) which extends in the opposite direction to the direction of movement of the substrate with respect to the nozzle is parallel to the substrate, and the edge (53) which it forms at an acute angle with the extended external wall (5b) of the third tuyere (5) is transversely offset in the direction of the said movement with respect to the axial median plane of the tuyere (3). On the other hand, the surface (52) of the second deflector member (5a) forms a blunt edge (54) with the corresponding longitudinal wall (4b) of the second tuyere.

Abstract: A heated defrosting glass pane contains an alternation of conductive or nonelectricity-conductive regions. The conductive regions are transparent while in a heated state and are arranged in such a manner that during defrosting, they alone, by themselves, provide a sufficient integral visibility through the glass pane, while at the same time the nonconductive zones remain opaque. The ratio of the integral surface between the conductive and nonconductive surfaces is 1/8 to 1/2.

Abstract: Substrate of glass or other mineral material covered with a coating of SnO.sub.2 whose electrical conductivity, transparency in the visible spectrum and thermal reflectivity are very high.This coating is obtained by the technique of vapor phase chemical deposition (CVD), by reacting a volatile tin compound with water vapor in the presence of hydrogen, on the heated substrate surface. The reaction mixture may also include HF.The coated substrate is suitable for electrically heated glazing.

Abstract: A nozzle for depositing a layer of solid material on a heated substrate, in particular by chemical vapor deposition, comprises three supply chambers for gas, which chambers communicate with three prismatic spaces which converge towards an outlet slot divided into three by two longitudinal strips which are tensioned at both ends and are applied against support surfaces which provide the strips with their respective inclinations centered on the truncated apex of a prismatic cavity which is divided by the strips to form the prismatic spaces. This arrangement enables a uniform spacing of the outlet slots of the spaces to be maintained whatever the length of the nozzle.

Abstract: By means of the nozzle, three gaseous curtains are formed converging on the surface of the substrate heated to a temperature of about 600.degree. C. which is driven in translatory movement, the intermediate curtain being constituted by a gaseous reactant or a reactant diluted in a carrier gas and the two lateral curtains being constituted by another naturally gaseous reactant or reactant diluted in a gas. The gaseous products of the reaction issuing from the nozzle are compelled to flow above a predetermined region of the substrate and these products are evacuated by suction by means of channels disposed at the extremities of this region of the substrate and a pump to which the channels are connected.

Abstract: Substrate of glass or other mineral material covered with a coating of SnO.sub.2 whose electrical conductivity, transparency in the visible spectrum and thermal reflectivity are very high.This coating is obtained by the technique of vapor phase chemical deposition (CVD), by reacting a volatile tin compound with water vapor in the presence of hydrogen, on the heated substrate surface. The reaction mixture may also inclue HF.The coated substrate is suitable for electrically heated glazing.

Abstract: By means of the nozzle, three gaseous curtains are formed converging on the surface of the substrate heated to a temperature of about 600.degree. C. which is driven in translatory movement, the intermediate curtain being constituted by a gaseous reactant or a reactant diluted in a carrier gas and the two lateral curtains being constituted by another naturally gaseous reactant or reactant diluted in a gas. The gaseous products of the reaction issuing from the nozzle are compelled to flow above a predetermined region of the substrate and these products are evacuated by suction by means of channels disposed at the extremities of this region of the substrate and a pump to which the channels are connected.