Strain gauge
AssigneeMINEBEA MITSUMI Inc.
InventorsAkiyo YUGUCHI, Aya ONO, Eiji MISAIZU
Life of this patent
Estimating the term…
Abstract
A strain gauge includes a flexible substrate; a resistor formed of material including at least one from among chromium and nickel, on or above the substrate; and electrodes electrically coupled to the resistor. Each electrode includes a terminal section extending from a corresponding end portion from among end portions of the resistor; a first metallic layer formed of copper, a copper alloy, nickel, or a nickel alloy, on or above the terminal section; and a second metallic layer formed of material having better solder wettability than the first metallic layer, on or above the first metallic layer.
Claims16
1-12. (canceled)
A strain gauge comprising:
- a flexible resin substrate;
- a functional layer formed of a metal, an alloy, or a metal compound, directly on one surface of the substrate;
- a resistor formed of a Him that includes Cr, CrN, and Cr2N and into which an element included in the functional layer is diffused, on one surface of the functional layer;
- and electrodes electrically coupled to the resistor,
- wherein a gauge factor of the strain gauge is 10 or more, and
- wherein each electronic includes:
- a terminal section extending from a corresponding end portion from among end portions of the resistor;
- a first metallic layer formed of copper, a copper alloy, nickel, or a nickel alloy, on or above the terminal section;
- and
- a second metallic layer formed of material having better solder wettability than the first metallic layer, on or above the first metallic layer.
A strain gauge comprising:
- a flexible resin substrate;
- a functional layer formed of a metal, an alloy, or a metal compound, directly on one surface of the substrate;
- a resistor formed of a film that includes Cr, CrN, and Cr2N and into which an element included in the functional layer is diffused, on one surface of the functional layer;
- and electrodes electrically coupled to the resistor,
- wherein a temperature coefficient of resistance of the strain gauge is in a range of from −1000 ppm/° C. to +1000 ppm/° C., and
- wherein each electrode includes:
- a terminal section extending from a corresponding end portion from among end portions of the resistor;
- a first metallic layer formed of copper, a copper alloy, nickel, or a nickel alloy, on or above the terminal section;
- and
- a second metallic layer formed of material having better solder wettability than the first metallic layer, on or above the first metallic layer.
A strain gauge comprising:
- a flexible resin substrate;
- a functional layer formed of a metal, an alloy, or a metal compound, directly on one surface of the substrate;
- a resistor formed of a film including Cr, CrN, Cr2N, on one surface of the functional layer;
- and
- electrodes electrically coupled to the resistor,
- wherein each electrode includes:
- a terminal section extending from a corresponding end portion from among end portions of the resistor;
- a first metallic layer formed of copper, a copper alloy, nickel, or a nickel alloy, on or above the terminal section;
- and
- a second metallic layer formed of material having better solder wettability than the first metallic layer, on or above the first metallic layer.
Dependencies are inferred from the claim text.