Chip-type variable resistor
AssigneeRohm Co., Ltd.
InventorTamotsu Yoshimura
Life of this patent
Estimating the term…
Abstract
A chip-type variable resistor is provided which includes an insulating substrate formed with a resistor strip which is arcuate at least partially and has both ends electrically connected to respective extremity electrode terminals, an intermediate terminal member mounted to the substrate, and a contact member electrically connected to the intermediate terminal member and rotatably mounted to the substrate in slidable contact with the resistor strip. The resistor strip includes at least one portion having a lower area resistivity (defined as a resistance per unit surface area) and at least another portion having a higher area resistivity.
Claims6
A chip-type variable resistor comprising:
- an insulating substrate having a surface formed with a resistor strip, the resistor strip having a first end portion electrically connected to a first extremity electrode terminal, the resistor strip also having a second end portion electrically connected to a second extremity electrode terminal, the resistor strip further having an arcuate adjustable resistance region between, but not including, the first and second end portions;
- an intermediate terminal member mounted on the substrate;
- and
- a contact member electrically connected to the intermediate terminal member and rotatably mounted on the substrate in slidable contact with the adjustable resistance region of the resistor strip;
- wherein the adjustable resistance region of the resistor strip includes at least one portion having a first area resistivity, the area resistivity being defined as a resistance per unit surface area of the resistor strip;
- wherein each of the first and second end portions has a second area resistivity which is higher than said first area resistivity;
- wherein the first end portion of the resistor strip differs in length from the second end portion;
- and
- wherein a combined length of the first end portion and the first extremity electrode terminal on said surface of the substrate is equal to a combined length of the second end portion and the second extremity electrode terminal on said surface of the substrate.
Dependencies are inferred from the claim text.