Integrated Multilayer Sensing Structure for Higher Sensitivity
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Solution Overview
Problem
Existing multilayer structures for sensing applications face challenges such as large electrodes taking up space, increased costs, assembly complexity, and sensitivity issues due to separate components, which complicate manufacturability and lead to loose components during injection molding.
Innovation Solution
An integrated multilayer structure with a molded or cast plastic layer and film layers, where the film layer on one side contains reactance sensing electronics and is connected to control circuitry, and the film layer on the other side has a sensing area with a physical feature to reduce the electrical distance between the sensing element and the sensing area, enhancing sensitivity while maintaining a long electrical connection to reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If large electrodes are arranged on the surface or close to the surface of the device, then sensing area is increased, but device space is reduced and assembly complexity increases
Solution Approach 1:
The patent combines the sensing electrode and the substrate into a single integrated structure where the electrode is formed directly on the substrate surface. This merging eliminates the need for separate electrode components and their associated assembly steps, thereby reducing assembly complexity while maintaining or expanding the sensing area.
Solution Approach 2:
The patent transitions from planar 2D electrode arrangements to three-dimensional structures by forming electrodes that extend through multiple layers or at angles. This dimensional change allows the sensing area to be increased without proportionally increasing the device footprint, effectively utilizing vertical space to resolve the space-complexity contradiction.
2Adaptability or versatility
If separate components are used for sensing elements and connections, then manufacturing flexibility is improved, but component reliability decreases due to loose connections during injection molding
Solution Approach 1:
The patent integrates the sensing elements, connections, and housing into a single molded component. The electrical connections are formed as integral parts of the molded structure rather than separate components, eliminating the risk of loose connections during injection molding while maintaining manufacturing flexibility through the molding process itself.
Solution Approach 2:
The patent employs composite material structures where conductive materials are embedded within or combined with the insulating housing material. This creates a unified structure with both mechanical and electrical functions, improving reliability by eliminating interface problems between separate components while retaining design flexibility.
3Measurement precision
If the electrical distance between sensing element and sensing area is reduced, then sensing sensitivity is improved, but interference from electrical connections increases
Solution Approach 1:
The patent introduces grounded shielding structures and insulating barriers as intermediary elements between the sensing electrode and electrical connections. These intermediaries maintain the close proximity needed for high sensitivity while blocking electrical interference paths, effectively mediating between the conflicting requirements of sensitivity and interference reduction.
Solution Approach 2:
The patent applies different material properties and structural characteristics to different regions of the device. The sensing area employs materials and structures optimized for signal detection, while connection regions use materials and structures optimized for electrical isolation. This local differentiation allows close spacing for sensitivity without compromising against interference.
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 solution improves sensing sensitivity by reducing the electrical distance between the sensing element and area, while maintaining a long enough connection to reduce interference, thus addressing the limitations of existing solutions in terms of space, cost, and manufacturability.
Implementation Method 1
reactance sensing electronics for reactance, such as (projected) capacitance or inductance, sensing
Implementation Method 2
reactance sensing electronics for reactance, such as (projected) capacitance or inductance, sensing
Implementation Method 3
the electrical distance between the sensing area and the sensing element is reduced by at least one physical feature at the position of the sensing area of the film layer to improve the associated sensing sensitivity
Data Source
AI summary
A method for manufacturing an integrated multilayer structure for sensing applications, including obtaining at least one film including a sensing area; arranging the at least one film with reactance sensing electronics for sensing of one or more selected target quantities or qualities and conversion thereof into representative electrical signals, said sensing electronics including at least one sensing element and an electrical connection configured to connect the sensing element to an associated control circuitry; and molding or casting, and configuring, at least one plastic layer so that the plastic layer defines an integrated, intermediate layer between the sensing electronics and the sensing area and that the sensing area is superimposed with the sensing element of the sensing electronics, wherein it is further provided at least one physical feature to locally reduce the electrical distance between the sensing area and the sensing element to improve the associated sensing sensitivity.