Solid-State Ion Sensor Structure for Stable Potential Measurement
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Solution Overview
Problem
Existing ion sensors face issues with potential variations and complexity due to the use of internal liquids, leading to complications in maintenance and unsuitability for mass production, and all-solid-state sensors suffer from large potential variations requiring calibration.
Innovation Solution
An ion sensor design incorporating a first and second internal solid layer with insertion materials and ion conductive ceramics, along with ion selective and reference electrodes, and an insulating layer to minimize potential variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If internal liquid-based ion sensors are used, then ion measurement function is maintained, but device complexity increases and maintenance becomes complicated
Solution Approach 1:
The patent extracts and removes the internal liquid component from the ion sensor structure, replacing it with solid-state materials. This eliminates the complications associated with liquid-filled electrodes while maintaining the ion measurement function through solid-state ion conduction mechanisms.
Solution Approach 2:
The patent substitutes the liquid-based electrochemical system with a solid-state system. By replacing the liquid internal electrolyte with solid ion-conductive materials, the patent eliminates mechanical complexity related to liquid containment while preserving the essential ion sensing capability through alternative solid-state conduction pathways.
2Device complexity
If all-solid-state ion sensors are used, then device complexity is reduced, but measurement precision deteriorates due to large potential variations
Solution Approach 1:
The patent changes the material parameters of the solid-state components, specifically selecting ion-conductive ceramics with controlled stoichiometry and composition. By adjusting these material parameters, the patent reduces potential variations among sensors while maintaining the simplified all-solid-state structure.
Solution Approach 2:
The patent employs composite material structures combining ion-conductive ceramics with specific stoichiometric compositions. These composite materials provide both the structural simplicity of solid-state design and the electrical stability needed to minimize potential variations, achieving both device simplicity and measurement precision.
3Productivity
If conventional solid-state ion sensors are used, then mass production is enabled, but manufacturing precision is compromised due to potential variations
Solution Approach 1:
The patent implements preliminary control measures during the manufacturing process, specifically controlling the stoichiometry and composition of ion-conductive ceramics before final sensor assembly. This preliminary action ensures uniform electrical properties across mass-produced sensors, reducing potential variations and improving manufacturing precision while maintaining high productivity.
Solution Approach 2:
The patent establishes specific material parameter ranges for ion-conductive ceramics that, when controlled during manufacturing, ensure sensor uniformity. By defining and controlling these critical parameters, the patent enables mass production while maintaining high manufacturing precision and minimal potential variations among produced sensors.
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 reduces potential variations and eliminates the need for calibration, making it suitable for mass production and accurate ion measurements.
Implementation Method 1
a first internal solid layer comprising a first insertion material and a first ion conductive ceramic
Implementation Method 2
a first internal solid layer comprising a first insertion material and a first ion conductive ceramic
Data Source
AI summary
An ion sensor is disclosed that includes an ion selective electrode including a first internal solid layer including a first insertion material, and a first ion conductive ceramic, an ion selective membrane provided on the first internal solid layer, a reference electrode including a second internal solid layer including a second insertion material, and a second ion conductive ceramic, an ionic liquid containing membrane provided on the second internal solid layer, and an insulator on which the ion selective electrode and the reference electrode are arranged.