Piezoelectric Deformation Sensor Layout for Thin Wiring Connection
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Solution Overview
Problem
Existing deformation detection sensors using piezoelectric films require additional mounting components, increasing thickness and compromising the thin film's characteristics, and necessitate securement of terminal components, which complicates the design.
Innovation Solution
A deformation detection sensor design that integrates a detection electrode, first and second ground electrodes, a piezoelectric film, and a substrate with a joint member connecting the wiring and detection electrode, eliminating the need for terminal components by positioning the joint on the opposite side of the piezoelectric film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a mounting component such as a terminal component is used to connect the sensor and wiring, then the sensor can be connected to the wiring, but the thickness of the sensor increases and characteristics of a thin piezoelectric film cannot be utilized
Solution Approach 1:
The patent removes the mounting component (terminal component) from the sensor structure entirely. The wiring is directly connected to the detection electrode through a joint member formed on the substrate, extracting the unnecessary mounting component that was increasing sensor thickness while maintaining the electrical connection function.
Solution Approach 2:
The patent merges the connection function into the substrate itself by forming the joint member directly on the substrate surface. This combines the substrate's structural role with the electrical connection role, eliminating the need for separate mounting components and reducing overall sensor thickness.
2Device complexity
If a mounting component is used to connect the sensor and wiring, then the connection is established, but it is necessary to secure a mounting part for mounting the terminal component on the sensor
Solution Approach 1:
The patent extracts and removes the mounting component and its associated mounting part from the sensor structure. The joint member is formed directly on the substrate, eliminating the need for separate terminal components and their mounting structures, thereby reducing device complexity and sensor area.
Solution Approach 2:
The patent combines the electrical connection function and mechanical support function into the substrate and joint member assembly. This merging eliminates the need for separate mounting parts, reducing both structural complexity and the area occupied by mounting structures.
3Area of stationary object
If the joint member is positioned on the first face side where the piezoelectric film is disposed, then the wiring can be connected, but the area occupied by the piezoelectric film decreases
Solution Approach 1:
The patent inverts the conventional approach by positioning the joint member on the second face side of the substrate (opposite to where the piezoelectric film is disposed) instead of on the first face side. This inversion allows the piezoelectric film to occupy maximum area on the first face side while wiring connection is performed on the opposite side through the joint member.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design allows the piezoelectric film to occupy a larger area, reducing the overall sensor size while maintaining sensitivity and mechanical strength, and improves detection sensitivity by transmitting strain through extended connections.
Implementation Method 1
a piezoelectric film sandwiched between the detection electrode and the first ground electrode
Data Source
AI summary
A deformation detection sensor is provided that includes a detection electrode, a first ground electrode, a piezoelectric film sandwiched between the detection electrode and the first ground electrode, a substrate on which the detection electrode and a second ground electrode are formed, a wiring connected to the detection electrode, and a joint member that joins the wiring and the detection electrode.