Patent ID: 11940337
Assignee: SHENZHEN NEW DEGREE TECHNOLOGY CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. An electronic terminal, comprising an object being tested, a pressure sensing device, and a pressure sensing detection circuit;
wherein the pressure sensing device comprises:
a substrate attached to the object being tested, and
a pressure sensor, provided on the substrate, and comprising at least one thin-film piezoresistive sensor and at least four signal wires respectively led out from four corners of the thin-film piezoresistive sensor;
wherein a side of the thin-film piezoresistive sensor is attached to the substrate, and resistivity distribution of the thin-film piezoresistive sensor changes with deformation of the substrate when the substrate deforms, wherein one opposing pair of the at least four signal wires comprises one power wire and one ground wire respectively, and another opposing pair of the at least four signal wires comprises differential wires;
wherein the pressure sensing detection circuit is electrically connected to the pressure sensor, and the substrate is attached to the object being tested;
wherein the substrate is in a long strip shape, the long stripe-shaped substrate has two outer edges and two inner edges located inside the two outer edges, the thin-film piezoresistive sensor of the pressure sensor, the at least four signal wires and bonding pads at ends of the at least four signal wires are located within an area between the two inner edges;
wherein one of sides of the thin-film piezoresistive sensor is parallel to an arrangement direction of the pressure sensor; and
wherein longitudinal directions of the at least four signal wires are parallel to the arrangement direction of the pressure sensor.