Patent ID: 7154370

Claim:
A resistor comprising: an insulating substrate having first and second opposite flat surfaces and having a shape and a composition; a first resistive foil having a low TCR of 0.1 to 1 ppm/° C. and a thickness of 0.03 mils to about 0.7 mils cemented to the first flat surface with a cement; a second resistive foil having a low TCR of 0.1 to 1 ppm/° C. and a thickness of 0.03 mils to 0.7 mils cemented to the second flat surface, the second resistive foil connected to the first resistive foil, the first resistive foil and second resistive foil having approximately equal resistance values and providing approximately equal power dissipation on both surfaces of the substrate thereby reducing temperature gradients across the substrate, preventing bending of the insulating substrate, and avoiding resistance change associated with bending; the insulating substrate having a modulus of elasticity of 10×10 6 psi to 100×10 6 psi and a thickness of 0.5 mils to 200 mils; the first and second resistive foil each having a pattern to produce a desired resistance value; the insulating substrate, the first resistive foil, the second resistive foil and each pattern being selected to provide a cumulative effect of reduction of resistance change due to power.