Optoelectronic Radiation Detector With Filter Layer Structures
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Solution Overview
Problem
Existing radiation detectors are complex to produce and lack versatility in their applications, as they often require individual production of separate detector elements which can lead to crosstalk and difficulty in achieving desired spectral sensitivity distributions.
Innovation Solution
An optoelectronic radiation detector with multiple detector elements, each having a unique spectral sensitivity distribution, is designed using a base detector element and additional detector elements with filter layer structures. The filter layer structure absorbs specific wavelengths, allowing for different sensitivity ranges and reducing crosstalk by arranging detector elements laterally on a common support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate detector elements are individually produced, then each element can be optimized for specific spectral sensitivity, but the production process becomes complex and time-consuming
Solution Approach 1:
The patent divides the detector structure into modular components: a common support substrate and multiple detector elements that can be independently designed with different spectral sensitivity distributions. Each detector element contains specific filter layers (e.g., first filter layer for blue light, second filter layer for green light) arranged in segmented patterns, allowing independent optimization while maintaining production efficiency through standardized manufacturing processes for the common support structure.
Solution Approach 2:
The common support structure serves multiple functions simultaneously: it provides mechanical support for all detector elements, enables lateral arrangement of multiple elements, and facilitates integrated production. This universal base structure allows different detector elements with varying spectral sensitivities to be produced together on the same platform, resolving the contradiction between customization and production efficiency.
2Area of stationary object
If multiple detector elements are arranged close together, then device compactness is improved, but crosstalk between elements increases
Solution Approach 1:
The patent extracts and removes intermediate filter layers in specific regions between adjacent detector elements. By taking out these filter layers laterally between elements, the design eliminates the source of crosstalk (radiation that would otherwise pass through intermediate layers and contaminate adjacent element signals) while maintaining compact lateral arrangement. This selective removal strategy allows compact positioning without sacrificing signal purity.
3Measurement precision
If filter layers are added to achieve specific spectral sensitivity, then detection precision is improved, but device complexity increases
Solution Approach 1:
The patent implements local quality by applying different filter layer configurations to different detector elements based on their specific spectral sensitivity requirements. Each element can have tailored filter combinations (e.g., certain elements have first filter layers but not second filter layers, others have both) rather than uniform filtering across all elements. This localized approach achieves precise spectral detection for each element's purpose while avoiding unnecessary complexity in elements that don't require specific filtering.
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 simplifies the production of radiation detectors, enables them to be used in various applications, and reduces crosstalk between detector elements by allowing separate signal pickup from each element, achieving tailored spectral sensitivity distributions.
Implementation Method 1
The filter layer structure is designed such that the filter layer structure absorbs radiation with wavelengths smaller than the maximum wavelength and larger than the lower limit wavelength
Implementation Method 2
An optoelectronic radiation detector with a spectral sensitivity distribution corresponding to that of the human eye is known... a plurality of detector elements for signal generation
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2A
AI summary
The invention specifies an optoelectronic radiation detector (100) having a plurality of detector elements (1, 2, 3) for generating signals, wherein the detector elements each have a spectral sensitivity distribution, a detector element (1) has a basic detector element, the spectral sensitivity distribution of the basic detector element (1) has a lower limiting wavelength, another detector element (2, 3) has a filter layer structure (13) with at least one filter layer (14, 15), the sensitivity distribution of the other detector element (2, 3) has a maximum at a maximum wavelength, and wherein the filter layer structure is designed in such a manner that the filter layer structure absorbs radiation at wavelengths which are shorter than the maximum wavelength and longer than the lower limiting wavelength.