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US 12,306,053 B2Granted
Strain gauge including a barrier layer over a resistance body
AssigneeMINEBEA MITSUMI Inc.
InventorsTatsuya Takimoto, Shintaro Takata, Shinya Toda, Toshiaki Asakawa, Shigeyuki Adachi
Life of this patent
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Abstract
A strain gauge includes a flexible substrate; a resistor made from a film containing Cr, CrN, and Cr2N, on one surface of the substrate; and a resin barrier layer covering the resistor, and, in this strain gauge, in the barrier layer, a ratio of a moisture permeability (g/m2/24h) to a thickness (mm) is 5:1 or greater, and the thickness of the barrier layer is 100 μm or more and 3 mm or less.
Claims10
A strain gauge comprising:
- a flexible substrate;
- a resistor made from a film containing Cr, CrN, and Cr2N, on one surface of the substrate;
- a barrier layer covering the resistor, the barrier layer being made of resin;
- and
- an insulating stress relaxing layer between the resistor and the barrier layer,
- wherein, in the barrier layer, a ratio of moisture permeability (g/m2/24h) to thickness (mm) is 5:1 or greater, and the thickness of the barrier layer is 100 μm or more and 3 mm or less,
- wherein the insulating stress relaxing layer is an organic film having a lower Young's modulus than the barrier layer.
4 more elements
A strain gauge comprising:
- a flexible substrate;
- a resistor made from a film containing Cr, CrN, and Cr2N, on one surface of the substrate;
- a barrier layer covering the resistor, the barrier layer being made of resin;
- and
- an insulating stress relaxing layer between the resistor and the barrier layer,
- wherein, in the barrier layer, a ratio of moisture permeability (g/m2/24h) to thickness (mm) is 5:1 or greater, and the thickness of the barrier layer is 100 μm or more and 3 mm or less,
- wherein an entire perimeter of the insulating stress relaxing layer is enclosed by the barrier layer.
4 more elements
A strain gauge comprising:
- a flexible substrate;
- a resistor made from a film containing Cr, CrN, and Cr2N, on one surface of the substrate;
- a barrier layer covering the resistor, the barrier layer being made of resin;
- and
- an electrode electrically connected to the resistor, the electrode having a first sidewall facing a second sidewall of the barrier layer,
- wherein, in the barrier layer, a ratio of moisture permeability (g/m2/24h) to thickness (mm) is 5:1 or greater, and the thickness of the barrier layer is 100 μm or more and 3 mm or less,
- wherein a portion of the flexible substrate is exposed to a gap between the first sidewall of the electrode and the second sidewall of the barrier layer.
4 more elements
Dependencies are inferred from the claim text.