Low-Z Circuit Board Layout for Accurate X-Ray Detection
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Solution Overview
Problem
Existing X-ray detection devices suffer from stray X-ray emissions from contamination materials on the circuit board, which interfere with the accurate detection of X-rays within the relevant energy detection range, particularly in material analysis applications.
Innovation Solution
The X-ray detection device incorporates a circuit board with sensitive sections made of materials with an atomic number of 14 or less, such as aluminum oxide and silicon oxide, to minimize stray X-ray emissions, and uses shielding elements to prevent X-ray fluorescence from reaching the active volume, ensuring accurate X-ray detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional circuit board materials are used, then the device structure is simple and easy to manufacture, but stray X-ray emissions occur that interfere with detection accuracy
Solution Approach 1:
The patent applies parameter changes by selecting circuit board materials with specific atomic numbers (Z ≤ 14) to minimize X-ray fluorescence emissions. This material parameter selection resolves the contradiction by enabling accurate detection while maintaining conventional manufacturing processes
Solution Approach 2:
The patent implements local quality by creating a sensitive section with specific low-Z materials (aluminum oxide, silicon oxide) in the circuit board, while other sections may use different materials. This localized material optimization reduces stray X-rays in the detection path without requiring the entire board to be made from specialized materials
2Measurement precision
If shielding elements are added to block X-ray fluorescence, then detection accuracy improves, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent changes the material parameters of the circuit board itself (using low-Z materials with atomic number ≤ 14) to inherently reduce X-ray fluorescence, eliminating the need for additional shielding elements and simplifying the manufacturing process
Solution Approach 2:
The patent extracts the harmful X-ray fluorescence function from the system by selecting materials that do not produce fluorescence in the detection energy range, rather than adding shielding components to block the fluorescence
3Object-generated harmful factors
If low atomic number materials are used in the sensitive section, then stray X-ray emissions are minimized, but material selection and manufacturing precision requirements increase
Solution Approach 1:
The patent specifies material parameters (atomic number ≤ 14, purity ≥ 98%) that balance effective reduction of stray X-rays with availability of standard manufacturing materials and processes
Solution Approach 2:
The patent uses composite material structures (e.g., aluminum oxide substrate with aluminum conductor tracks) that achieve low-Z requirements while maintaining mechanical strength and manufacturability through well-established ceramic and metallization processes
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 significantly reduces stray X-ray interference, enhancing the accuracy and reliability of X-ray detection for material analysis by minimizing X-ray fluorescence from the circuit board materials, particularly in recycling applications.
Implementation Method 1
A sensitive section of the circuit board is free of contamination materials prone to emit contaminating X-ray emission within the relevant energy detection range upon being excited with X-rays, like stray X-rays
Implementation Method 2
The active volume is the region within the X-ray detector within which incident radiation is converted into electrons and then read out
Data Source
AI summary
In an embodiment an X-ray detection device includes a circuit board supporting conductor tracks on a base body and an X-ray detector mounted on the based body and configured to detect X-rays within a relevant energy detection range of the X-ray detection device, wherein a sensitive section of the circuit board is free of contamination materials prone to emit contaminating X-ray emission within the relevant energy detection range upon being excited with X-rays, and wherein in the sensitive section the base body and the conductor tracks consist essentially of circuit board materials having an atomic number of at most 14.