Infrared Emitter Substrate Segmentation for Thermal Mass Reduction
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Solution Overview
Problem
Conventional infrared emitters have a high thermal mass due to thick substrates with low thermal conductivity, which limits their efficiency and longevity in emitting infrared radiation for gas detection systems.
Innovation Solution
The infrared emitter design includes a substrate with a thin, low-thermal-conductivity material, a dispersive layer with high thermal conductivity covering at least 70% of the substrate's surface, and leads with high electrical and thermal conductivity to efficiently dissipate heat and reduce thermal mass, along with a heating element for emitting infrared radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a thick substrate with low thermal conductivity is used, then the structural integrity and component support are improved, but the thermal mass increases and temperature modulation capability deteriorates
Solution Approach 1:
The substrate is segmented into two distinct layers: a thick support substrate providing structural integrity and a thin dispersive layer providing thermal management. This segmentation allows each layer to optimize its thickness for its specific function without compromising the other.
Solution Approach 2:
The emitter uses a composite structure combining a low thermal conductivity support substrate with a high thermal conductivity dispersive layer. This composite approach allows the system to simultaneously achieve structural strength and effective temperature modulation.
2Strength
If a thick substrate is used, then the structural support is improved, but the thermal mass increases and power efficiency deteriorates
Solution Approach 1:
The substrate structure is divided into a thick support layer and a thin dispersive layer, allowing the support function to be fulfilled by the thick layer while the thin layer minimizes thermal mass and maximizes power efficiency.
Solution Approach 2:
Different regions of the substrate structure have different thermal conductivities: the support substrate has low thermal conductivity for structural stability, while the dispersive layer has high thermal conductivity for efficient heat management and improved power efficiency.
3Stability of the object's composition
If a thick substrate with low thermal conductivity is used, then the structural stability is improved, but the heat dissipation capability deteriorates
Solution Approach 1:
The substrate is segmented into a thick support substrate for structural stability and a thin dispersive layer for heat dissipation. This allows the support substrate to maintain structural integrity while the dispersive layer efficiently dissipates heat generated during operation.
Solution Approach 2:
The composite substrate structure combines materials with different thermal conductivities: the support substrate provides structural stability with low thermal conductivity, while the dispersive layer provides superior heat dissipation with high thermal conductivity.
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
This design enhances the power efficiency and prolongs the operation lifetime of the emitter by reducing thermal mass, improving temperature modulation, and increasing the signal-to-noise ratio while reducing power consumption.
Implementation Method 1
The heating element is disposed on a portion of the first surface of the substrate and is configured to emit infrared electromagnetic radiation in response to an electrical current being introduced thereto
Implementation Method 2
The dispersive layer is disposed on the first surface of substrate, has a thickness of less than about 40 μm, covers at least about 70% of the first surface, and is formed from a material having a thermal conductivity of at least 110 W/m ° C.
Data Source
AI summary
An infrared emitter is formed having a reduced thermal mass and increased thermal conductivity to effectively deliver and dissipate heat from a heating element that emits electromagnetic radiation. The improved thermal dynamic process may enhance one or both of power consumption and/or longevity.