Thermal Detector Membrane With Heat Dissipation Path and Barrier
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Solution Overview
Problem
Existing thermal radiation detection devices face challenges in achieving high spatial resolution while minimizing crosstalk between detector elements, which leads to reduced sensitivity and longer response times due to close proximity of detector elements.
Innovation Solution
A device with a membrane that incorporates a heat dissipation path with higher conductivity than the membrane to quickly discharge heat from detector elements and a heat barrier with lower conductivity to prevent heat conduction between elements, maintaining sensitivity and reducing crosstalk, thereby achieving short response times and high spatial resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If detector elements are arranged close to one another to achieve high spatial resolution, then spatial resolution is improved, but crosstalk between detector elements increases
Solution Approach 1:
The device divides the thermal detection function into separate detector elements that are thermally isolated from each other through the membrane structure, allowing close spatial arrangement while preventing heat transfer between elements
Solution Approach 2:
The membrane acts as an intermediary thermal barrier between adjacent detector elements, blocking heat conduction while allowing the elements to be positioned close together for high spatial resolution
2Measurement precision
If detector elements are arranged close to one another to achieve high spatial resolution, then spatial resolution is improved, but response time increases
Solution Approach 1:
The membrane provides locally differentiated thermal properties: it acts as a thermal barrier between detector elements while allowing efficient heat dissipation from each element to the heat sink, optimizing both resolution and response time
Solution Approach 2:
The solution moves the heat dissipation path from a lateral approach through the membrane to a vertical dimension through the heat sink, enabling fast thermal response without compromising spatial isolation
3Loss of time
If a heat dissipation path with higher heat conductivity is provided to reduce response time, then response time is improved, but heat conduction between detector elements increases
Solution Approach 1:
The membrane exhibits spatially varying thermal conductivity: low thermal conductivity in the lateral direction to prevent crosstalk, and high thermal conductivity in the vertical direction to the heat sink for fast response
Solution Approach 2:
The device uses a composite structure combining the membrane with low lateral thermal conductivity and heat sink materials with high thermal conductivity, achieving directional thermal management
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 effectively reduces crosstalk between detector elements, maintains sensitivity, and achieves a short response time, even with high detector element density, allowing for compact, high-resolution thermal radiation detection.
Implementation Method 1
at least one heat dissipation path is provided on the side of the membrane facing towards the detector elements and/or on the side of the membrane facing away from the detector elements, which heat dissipation path has a higher heat conductivity than the membrane and is connected with the detector elements in a heat-conductive manner via the membrane so that heat can be discharged from the detector elements with the heat dissipation path
Implementation Method 2
at least one heat barrier that has a lower heat conductivity than the membrane and extends between the detector elements is provided integrated into the membrane, such that a heat conduction in the membrane from the one detector element to the other detector element is prevented by the heat barrier
Implementation Method 3
The thermal detector element is a pyroelectric detector element. It possesses a layer design with two electrode layers and a pyroelectric layer with pyroelectrically sensitive material arranged between the electrode layers
Data Source
AI summary
A device to detect thermal radiation has a membrane and at least two detector elements that are respectively set up to transduce thermal radiation into an electrical signal and are mounted situated next to one another on the membrane, wherein at least one heat dissipation path is provided on the side of the membrane facing towards the detector elements and/or on the side of the membrane facing away from the detector elements, which heat dissipation path has a higher heat conductivity than the membrane and is connected with the detector elements in a heat-conductive manner via the membrane so that heat can be discharged from the detector elements with the heat dissipation path, whereby the response time of the detector elements is short; and wherein at least one heat barrier that has a lower heat conductivity than the membrane and extends between the detector elements is provided integrated into the membrane, such that a heat conduction in the membrane from the one detector element to the other detector element is prevented by the heat barrier; whereby the crosstalk of the detector elements is low.