Imprinted Thin-Film Sensor Micro-Wire Fabrication
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Solution Overview
Problem
The high cost and limited applicability of electronic sensors due to expensive manufacturing processes and precision issues in achieving small feature sizes, particularly in forming electrodes with precise edge definitions and complex patterns, restrict their widespread use in environmental monitoring.
Innovation Solution
A method for creating an imprinted electronic sensor structure with a thin-film multi-layer micro-wire structure on a substrate, involving the formation of micro-channels and layers with a conductive and reactive layer configuration that improves conductivity, flexibility, and reduces manufacturing costs, allowing for sensitive environmental factor detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional photolithographic methods are used to fabricate sensors with small feature sizes, then measurement precision and electrode pattern definition are improved, but manufacturing cost increases significantly
Solution Approach 1:
The patent uses a physical stamp or mold to directly copy the electrode pattern onto the substrate through imprinting, replacing the complex photolithographic process. This copying approach achieves precise feature definition through direct mechanical replication rather than chemical photoresist processes, significantly reducing manufacturing cost while maintaining precision
Solution Approach 2:
The patent replaces the chemical-based photolithographic system with a mechanical imprinting system. The mechanical stamp directly transfers the pattern through physical contact and pressure, eliminating the need for photoresist materials, UV exposure equipment, and chemical development processes, thereby reducing manufacturing complexity and cost
2Reliability
If conventional sensor fabrication processes are used, then sensor performance is achieved, but device complexity and manufacturing steps increase
Solution Approach 1:
The patent combines multiple fabrication steps into a single imprinting operation. The stamp simultaneously defines the electrode pattern, creates the necessary structural features, and positions elements accurately, merging what would otherwise require separate photolithography, etching, and deposition steps into one integrated process
Solution Approach 2:
The patent performs preliminary pattern definition through the physical stamp design itself, which pre-configures all necessary geometric information. This preliminary action eliminates the need for subsequent pattern transfer steps, reducing overall process complexity while ensuring consistent sensor performance
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 approach enables miniaturized sensors with enhanced sensitivity, selectivity, and response time while reducing production costs, enabling precise detection of environmental factors with improved signal-to-noise ratios and flexible substrate compatibility.
Implementation Method 1
curing the curable layer to form a cured layer
Implementation Method 2
The reactive layer is exposed to an environmental factor and at least a portion of the reactive layer responds to the environmental factor
Data Source
AI summary
A method of making an imprinted electronic sensor structure on a substrate for sensing an environmental factor includes coating, imprinting, and curing a curable layer on the substrate to form a plurality of spatially separated micro-channels extending from the layer surface into the cured layer. First and second layers are located in each micro-channel to form a multi-layer micro-wire. Either the first layer is a cured electrical conductor forming a conductive layer located only within the micro-channel and the second layer is a reactive layer or the first layer is a reactive layer and the second layer is a cured electrical conductor forming a conductive layer located only within the micro-channel. The reactive layer is exposed to the environmental factor and at least a portion of the reactive layer responds to the environmental factor.