Single Die Chemical Sensor Integration for Compact Detection
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Solution Overview
Problem
Existing chemical sensors are often large, expensive, and bulky due to their discrete sensing elements and circuit components, which complicates manufacturing and reduces accuracy in chemical detection.
Innovation Solution
A chemical detection device integrated into a single semiconductor die, featuring a chemical sensor, an analog-to-digital converter, and a microcontroller, where the chemical sensor outputs an analog signal that is converted to a digital signal for concentration calculation, allowing for compact, cost-effective, and accurate chemical detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If chemical sensors use discrete sensing elements and circuit components formed separately, then the sensor can be manufactured using traditional methods, but the device becomes bulky and expensive
Solution Approach 1:
The patent combines the chemical sensor, analog-to-digital converter, and microcontroller onto a single semiconductor die. This integration eliminates the need for separate discrete components and their associated interconnections, directly reducing device volume while simplifying the manufacturing process through standard semiconductor fabrication techniques
2Ease of manufacture
If chemical sensors use discrete sensing elements and circuit components formed separately, then the components can be independently manufactured, but the overall system becomes expensive to manufacture
Solution Approach 1:
The patent integrates multiple functional components (chemical sensor, ADC, microcontroller) into a single semiconductor die using standard fabrication processes. This approach reduces manufacturing complexity by eliminating the need for separate component assembly, packaging, and interconnection, while the modular functional blocks within the die maintain design flexibility
Solution Approach 2:
The semiconductor die is designed to perform multiple functions: chemical sensing, analog-to-digital conversion, and microcontroller processing. This multi-functionality is achieved within a single integrated structure, reducing the overall system complexity while maintaining the ability to independently optimize each functional block
3Reliability
If chemical sensors are large and bulky, then discrete components can be individually tested and replaced, but the device becomes expensive and impractical for portable applications
Solution Approach 1:
The patent integrates the chemical sensor, ADC, and microcontroller onto a single semiconductor die. This integration improves reliability by eliminating external interconnections and assembly points that are prone to failure, while the modular functional blocks allow for systematic testing and validation during the fabrication process
Data Source
AI summary
A semiconductor die includes a chemical sensor, a digital to analog converter, and microcontroller formed therein. The chemical sensor detects the presence of a chemical and outputs an analog signal to the digital to analog converter. The analog to digital converter converts the analog signal to a digital signal. The analog to digital converter outputs the digital signal to the microcontroller. Microcontroller calculates a value of the concentration of the selected chemical.