PRECISE THIN-FILM RESISTOR Russian patent published in 2011 - IPC H01C7/00 

FIELD: electricity.

SUBSTANCE: precise thin-film resistor (TFR) consists of insulating substrate with located on its surface membraneous rectangular resistance element with stepped film thickening and two membraneous contact outputs at its ends. Note that step thickness is approximately equal to resistance film thickness of main resistor. The edge of the first step, counting from output, goes perpendicularly current line along whole resistor width at a distance for one - not less thickness of resistance film main part, and exact value of this distance and step thickness is calculated by model analysis considering resistance film properties. The third membraneous metal contact output is potential and is connected to the body of main resistor by strip from main resistance material. The edge of the second step is away from its contact at a distance n times more, than the first one. Note that numerical value of n coefficient is calculated from mathematical expression.

EFFECT: provision of additional opportunity to bring temperature coefficient of resistance to required value.

3 dwg