Flexible Pressure Sensor Structure with Slits for Stable Layer Thickness
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Solution Overview
Problem
Flexible substrates with sensor elements experience errors due to expansion or contraction, leading to inaccurate pressure measurements.
Innovation Solution
A mesh-like structure with slits in the elastic member surrounding island-shaped portions of the substrates, allowing for expansion without interfering with the sensor elements, thereby maintaining the thickness of the pressure-sensitive layer and improving measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible substrate with sensor elements is used, then flexibility and elasticity are improved, but measurement precision deteriorates due to errors occurring before and after expansion or contraction
Solution Approach 1:
The elastic member is divided into multiple regions: a first region with a mesh-like structure containing slits that allows expansion/contraction, and a second region that maintains a consistent thickness to support the pressure-sensitive layer. This segmentation enables different parts of the elastic member to perform different functions - one part provides flexibility while the other maintains measurement precision.
Solution Approach 2:
Different regions of the elastic member are given different structural properties. The first region has a mesh-like structure with slits for flexibility, while the second region has a solid structure for stability. This local differentiation allows the elastic member to simultaneously provide both flexibility and measurement accuracy in different areas.
2Adaptability or versatility
If the elastic member is expanded to accommodate flexible substrate, then adaptability is improved, but the thickness of the pressure-sensitive layer changes causing measurement errors
Solution Approach 1:
The elastic member is segmented into a first region that expands with slits and a second region that maintains constant thickness. The pressure-sensitive layer is positioned over the second region, ensuring it experiences minimal thickness variation during expansion, thus maintaining manufacturing precision while allowing overall adaptability.
Solution Approach 2:
The second region of the elastic member acts as an intermediary between the expanding first region and the pressure-sensitive layer. It mediates the expansion forces by providing a stable, consistent thickness region that protects the pressure-sensitive layer from thickness variations while still allowing the overall structure to be flexible.
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 configuration suppresses changes in the pressure-sensitive layer thickness during expansion or contraction, enhancing the reliability and accuracy of pressure measurements.
Implementation Method 1
an elastic member that covers the first substrate, the second substrate and the pressure sensitive layer
Implementation Method 2
a pressure sensitive layer disposed between the first substrate and the second substrate
Data Source
AI summary
According to one embodiment, an electronic device includes a first substrate, a second substrate opposing the first substrate, a pressure sensitive layer disposed between the first substrate and the second substrate, and an elastic member that covers the first substrate, the second substrate and the pressure sensitive layer. The first and second substrates include a first and second insulating substrates formed into a mesh-like shape. The elastic member includes slits that are formed around a first island-shaped portion of the first insulating substrate and a second island-shaped portion of the second insulating substrate. The slits open when the elastic member is expanded.