MIM Heat-Radiating Layer for Selective ≤4 μm Emission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional heat-radiating light sources with sealed configurations are complex and costly, and they struggle to achieve high thermal emittance for narrowband wavelengths equal to or smaller than 4 μm while maintaining low thermal emittance for wavelengths greater than 4 μm, which is necessary for efficient heating through quartz glass without overheating the glass.
Innovation Solution
The heat-radiating light source incorporates a radiation control portion with an MIM lamination portion, including a pair of platinum layers and a resonating transparent oxide layer, which is laminated with a radiating transparent oxide layer. This configuration allows for high emittance in the narrowband wavelength range equal to or smaller than 4 μm and low emittance in the far infrared range, while being exposed to the atmosphere to simplify the design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the substrate and heat-radiating layer are disposed under a sealed state within a sealed tube, then deterioration by oxidization is prevented, but the overall configuration becomes complicated and costly
Solution Approach 1:
The invention extracts the heat-radiating layer from the sealed tube environment and places it in direct contact with the atmosphere. The substrate is also exposed to air. This eliminates the sealed tube structure entirely, resolving the contradiction by removing the sealing requirement while maintaining oxidization resistance through the specific material composition and surface treatment of the heat-radiating layer.
Solution Approach 2:
The heat-radiating layer is constructed as a composite structure with specific materials that provide both high-temperature stability and oxidization resistance in atmospheric conditions. This composite material approach allows the system to operate reliably without sealing, thereby simplifying the overall configuration while maintaining reliability.
2Power
If far infrared light having a wavelength greater than 4 μm is emitted, then heating of the heating object can be achieved, but the quartz glass will be heated to a high temperature requiring significant cooling arrangement
Solution Approach 1:
The heat-radiating layer is designed with spatially varying emission characteristics. It exhibits high emittance in the narrowband wavelength range (≤4 μm) that passes through quartz glass effectively, while maintaining low emittance in the far-infrared range (>4 μm) to minimize heating of the quartz glass. This local quality differentiation in radiation properties allows selective heating without excessive glass heating.
Solution Approach 2:
The invention changes the radiation parameters of the heat-radiating layer by controlling its emittance spectrum. Through material selection and structural design, the layer achieves high emittance at wavelengths ≤4 μm and low emittance at wavelengths >4 μm. This parameter control optimizes energy transmission through the quartz glass while minimizing energy absorption by the glass itself.
3Power
If high thermal emittance for narrowband wavelength equal to or smaller than 4 μm is achieved, then efficient heating through quartz glass is enabled, but the configuration becomes more complex
Solution Approach 1:
The heat-radiating layer is segmented into multiple sub-layers or zones with different material compositions and thicknesses. Each segment contributes to the overall spectral emittance characteristics, enabling high thermal emittance in the narrowband range through the combined effect of these segmented structures. This segmentation achieves the desired optical properties without requiring complex external optical components.
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 configuration enables efficient heating by amplifying the radiant light in the desired narrowband wavelength range, reducing the risk of overheating the quartz glass, and maintaining optical characteristics for an extended period even when exposed to the atmosphere.
Implementation Method 1
the resonating transparent oxide layer has a thickness providing a resonance wavelength equal to or smaller than 4 μm
Implementation Method 2
the radiation control portion comprising an MIM lamination portion including a pair of platinum layers juxtaposed along a lamination direction of the heat-radiating layer and the substrate and a resonating transparent oxide layer formed of a transparent oxide and disposed between the pair of platinum layers
Implementation Method 3
a radiating transparent oxide layer formed of a transparent oxide
Implementation Method 4
the substrate is constituted of a high melting point metal such as tungsten which generates heat with supply of electric current thereto
Data Source
AI summary
A heat-radiating light source including a heat-radiating layer and a substrate laminated thereon for heating the heat-radiating layer is disclosed. A heat-radiating layer and a substrate for heating the heat-radiating layer are laminated. In the heat-radiating layer, there are provided a radiation control portion and a radiating transparent oxide layer, the radiation control portion having an MIM lamination portion including a pair of platinum layers juxtaposed along lamination direction and a resonating transparent oxide layer formed of a transparent oxide and disposed between the pair of platinum layers, the radiation control portion and the radiating transparent oxide layer are laminated with the radiation control portion and the radiating transparent oxide layer are disposed closer to the substrate in this order. The resonating transparent oxide layer R has a thickness providing a resonance wavelength equal to or smaller than 4 μm.