Anisotropically-Conductive Sheet Sensor for Liquid Detection
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Solution Overview
Problem
Conventional liquid sensing sheets require a complex configuration and multiple components, making them costly and difficult to simplify, while also lacking efficiency in detecting small amounts of liquid.
Innovation Solution
A sheet sensor with an anisotropically-conductive sheet and conductive members electrically connected to its surface, allowing for sensing via resistance changes, featuring a simple configuration and hydrophilic properties for enhanced liquid detection, including a non-woven fabric layer and recessed design for improved sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional liquid sensing sheets use multiple components including insulating sheets, adhesive tapes, and conductive sheets, then the sensing function is achieved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple functional layers (insulating sheet, adhesive layer, and conductive sheet) into a single integrated anisotropically-conductive sheet. This sheet simultaneously provides electrical insulation in the lateral direction, adhesion to substrates, and electrical conduction in the thickness direction, thereby reducing the number of separate components while maintaining the liquid sensing function.
Solution Approach 2:
The anisotropically-conductive sheet serves multiple functions: it acts as an insulating barrier between conductive members, provides adhesive bonding to the substrate and conductive members, and enables electrical conduction in the thickness direction for signal transmission. This multi-functional design eliminates the need for separate insulating sheets and adhesive tapes.
2Ease of manufacture
If conventional liquid sensing sheets use dispersively arranged adhesive, then bonding is achieved, but the manufacturing precision and bonding reliability decrease
Solution Approach 1:
The anisotropically-conductive sheet provides uniform bonding properties across its entire surface through its homogeneous internal structure. The consistent distribution of conductive particles within the insulating matrix ensures uniform adhesive performance and bonding strength, eliminating the variability associated with dispersively applied adhesive.
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 sheet sensor effectively detects small amounts of liquid with a reduced number of components and a simpler configuration, offering enhanced sensitivity and durability through hydrophilic properties and a recessed design, while maintaining insulating properties between conductive members.
Implementation Method 1
an anisotropically-conductive sheet exhibiting conductivity in a thickness direction
Implementation Method 2
exhibiting conductivity in a thickness direction
Implementation Method 3
featuring a simple configuration and hydrophilic properties for enhanced liquid detection
Implementation Method 4
including a non-woven fabric layer and recessed design for improved sensitivity
Data Source
AI summary
Provided is a sheet sensor comprising an anisotropically-conductive sheet exhibiting conductivity in a thickness direction and having a first surface as a contact surface for a sensing target object, and multiple conductive members electrically connected to a second surface of the anisotropically-conductive sheet and electrically insulated from each other.