Trw Limited

Howard E Shapiro

Kenneth M Merz

A vitreous enamel resistor material comprising a mixture of a vitreous glass frit and fine particles of tantalum. The vitreous enamel resistor material may also include fine particles selected from titanium, boron, tantalum oxide (Ta.sub.2 O.sub.5), titanium oxide (TiO), barium oxide (BaO.sub.2), zirconium dioxide (ZrO.sub.2), tungsten trioxide (WO.sub.3), tantalum nitride (Ta.sub.2 N), titanium nitride (TiN), molybdenum disilicide (MoSi.sub.2), and magnesium silicate MgSiO.sub.3). An electrical resistor is made from the resistor material by applying the material to a substrate and firing the coated substrate to a temperature at which the glass melts. Upon cooling, the substrate has on a surface thereof a film of glass having the tantalum particles and particles of the additive material, if used, embedded therein and dispersed therethroughout.

Resistor material, resistor made therefrom and method of making the same

A vitreous enamel resistor material comprising a mixture of a vitreous glass frit and fine particles of tantalum nitride (Ta.sub.2 N). The vitreous enamel resistor material may also include fine particles selected from boron, tantalum, silicon, zirconium dioxide (ZrO.sub.2), and magnesium zirconate (MgZrO.sub.3). An electrical resistor is made from the resistor material by applying the material to a substrate and firing the coated substrate to a temperature at which the glass melts. Upon cooling, the substrate has on a surface thereof a film of glass having the tantalum nitride particles and particles of the additive material, if used, embedded therein and dispersed therethroughout.

A vitreous enamel resistor material comprising a mixture of vitreous glass frit and fine particles of a mixture of zinc oxide (ZnO) and a material which will provide either lithium, tin, nickel, aluminum, indium, titanium, tantalum, zinc, gallium, vanadium, tungsten, or molybdenum. An electrical resistor is made from the resistor material by applying the material to a substrate and firing the coated substrate to a temperature at which the glass melts. Upon cooling, the substrate has on a surface thereof a film of glass having the particles of the mixture embedded therein and dispersed therethroughout. The resistor material provides a resistor having a wide range of resistivities with a low temperature coefficient of resistance and a low voltage coefficient of resistance.

A material for a vitreous enamel electrical resistor includes a mixture of a glass frit and particles of nickel, iron and cobalt. The material is applied to a substrate and fired to melt the glass frit, and then cooled to form a layer of the glass with particles of an alloy of nickel, iron and cobalt embedded therein. The material provides a resistor having a high temperature coefficient of resistance and which can be self terminating.

Vitreous enamel material for electrical resistors and method of making

A vitreous enamel resistor material comprising a mixture of vitreous glass frit and fine particles of zinc oxide (ZnO). An electrical resistor is made from the resistor material by applying the material to a substrate and firing the coated substrate to a temperature at which the glass melts. Upon cooling, the substrate has on a surface thereof a film of glass having the zinc oxide particles embedded therein and dispersed therethroughout. The resistor material provides resistors having a wide range of resistivities with low temperature coefficients of resistance and low voltage coefficients of resistance.

A termination material for a vitreous enamel electrical resistor includes a mixture of a glass frit and particles of either molybdenum, tungsten, tantalum or titanium. The termination material is applied to a substrate and fired to melt the glass frit, and then cooled to form a layer of the glass with the metal particles embedded therein. The termination material may be applied to the substrate either before or after the resistance material is applied to the substrate and is particularly useful with vitreous enamel resistance materials which include either a mixture of tantalum nitride and tantalum, a mixture of tungsten carbide and tungsten, or an alloy of copper and nickel.

Termination for electrical resistor and method of making the same

A vitreous enamel resistance material including a mixture of a vitreous glass frit and fine particles of a conductor which is an alloy of nickel and chromium. The conductor particles are present in the amount of 28 to 80% by weight. Up to 3% by weight of titanium and/or titanium nitride may be included in the resistance material to adjust the temperature coefficient of resistance of the material.

Electrical resistor glaze composition and resistor

A termination material for a vitreous enamel electrical resistor which includes a mixture of a glass frit and particles of nickel and iron. The termination material is applied to a substrate and fired to melt the glass frit, and then cooled to form a layer of the glass with particles of an alloy of nickel and iron embedded therein. The termination material may be applied to the substrate either before or after the resistance material is applied to the substrate.

Termination for electrical resistor and method of making same

An electrical resistor and method of making same including a substrate of an electrical insulating material having on a surface thereof a film of a resistance material and a termination film of a conductive material at each end of the resistance film. The resistance film is preferably a layer of a glass having embedded therein conductive particles such as tantalum nitride and tantalum or tungsten carbide and tungsten. The termination film contains either molybdenum, tungsten or a mixture thereof.

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Philadelphia, PA, United States of America

Howard E Shapiro