Chamfered Scintillator Corner Design for Flexible Radiation Detector
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Solution Overview
Problem
In radiation detectors used in radiography apparatuses, the scintillator tends to peel off from the flexible substrate due to a smaller contact area at the corners, leading to potential damage and reduced image quality.
Innovation Solution
The corners of the scintillator are chamfered, with the outer edge positioned closer to the inside of the substrate than the extension line of the sides sharing the corner, increasing the contact area and reducing the risk of peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the scintillator is stacked on a flexible substrate, then the radiation detector can be made flexible and adaptable, but the corner of the scintillator has a smaller contact area with the substrate and is likely to peel off
Solution Approach 1:
The patent applies local quality by chamfering only the corners of the scintillator while leaving the main body intact. This localized modification increases the contact area specifically at the corner regions where peeling is most likely to occur, without affecting the overall flexibility or functionality of the scintillator-substrate assembly.
Solution Approach 2:
The chamfered corners create a curved or beveled transition zone instead of a sharp 90-degree angle. This curvature distributes the stress more evenly across the corner region and increases the surface area in contact with the substrate, preventing peeling while maintaining the flexible nature of the overall structure.
2Area of stationary object
If the outer edge of the scintillator corner is disposed on the extension line of the sides or closer to the outside, then the scintillator coverage is maximized, but the contact area with the substrate is reduced and peeling risk increases
Solution Approach 1:
The patent applies local quality by chamfering only the corners of the scintillator while leaving the main body intact. This localized modification increases the contact area specifically at the corner regions where peeling is most likely to occur, without affecting the overall flexibility or functionality of the scintillator-substrate assembly.
Solution Approach 2:
The chamfered corners slightly reduce the overall coverage area of the scintillator, but this partial sacrifice in coverage area prevents peeling at the corners. The main body of the scintillator retains full coverage, so the loss is minimal while the benefit in terms of reliability is significant.
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 stability of the scintillator on the substrate, reducing the risk of peeling and breakage, and ensures high-quality radiographic images by maintaining the scintillator's coverage over the active area.
Implementation Method 1
a scintillator that has a scintillator main body having a polygonal plate shape and a protruding portion protruding outward from at least one corner of the scintillator main body and converts radiation into visible light
Data Source
AI summary
A radiation detector includes a substrate having flexibility, a plurality of pixels which are provided on a surface of the substrate and each of which includes a photoelectric conversion element, and a scintillator that is stacked on the substrate and has a plurality of corners. An outer edge of each of the corners of the scintillator is disposed closer to the inside of the substrate than an extension line of each of sides sharing the corner.