Radiation Detector Moisture Protection via Nested Light Reflective Layer
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Solution Overview
Problem
Existing X-ray image detectors face challenges in preventing moisture from reaching the scintillator layer, which can lead to deterioration of the scintillator's characteristics, reducing the efficiency of X-ray conversion to light and affecting image quality.
Innovation Solution
A radiation detector design that includes a photo-electric conversion substrate with a detection area and a non-detection area, a scintillator layer in the detection area, a frame-shaped sealant around the scintillator, a moisture-proof cover above the scintillator, and a light reflective layer between the scintillator and the moisture-proof cover, all working together to suppress moisture reaching the scintillator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a moisture-proof cover is provided above the scintillator layer, then moisture protection is improved, but device complexity increases
Solution Approach 1:
The moisture-proof cover is nested within the existing detector structure, with the light reflective layer positioned between the scintillator layer and the moisture-proof cover. This nested arrangement provides moisture protection while minimizing additional structural complexity by utilizing the existing layered architecture of the detector.
Solution Approach 2:
The light reflective layer serves as an intermediary element between the scintillator layer and the moisture-proof cover. It not only provides optical functionality to enhance light collection efficiency but also acts as a protective barrier that contributes to moisture protection, thereby reducing the need for separate protective structures.
2Productivity
If a light reflective layer is provided between the scintillator layer and the moisture-proof cover, then light collection efficiency is improved, but device complexity increases
Solution Approach 1:
The light reflective layer is merged with the moisture-proof cover assembly, combining the optical reflection function with the moisture protection function in a single integrated structure. This merging approach enhances light collection efficiency while avoiding the need for separate, additional protective layers that would increase overall device complexity.
Solution Approach 2:
The light reflective layer performs multiple functions: it reflects light back to the photo-electric conversion substrate to improve light collection efficiency, and simultaneously serves as part of the moisture-proof barrier system. This multi-functionality allows the same structural element to address both optical performance and environmental protection requirements.
3Reliability
If the moisture-proof cover is directly adhered to the sealant, then sealing reliability is improved, but manufacturing difficulty increases
Solution Approach 1:
The light reflective layer acts as an intermediary between the sealant and the moisture-proof cover. This intermediary layer provides a suitable bonding surface for the moisture-proof cover, enhancing sealing reliability by ensuring proper adhesion, while the overall assembly remains manufacturable through a systematic layer-by-layer construction process.
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 effectively prevents moisture from reaching the scintillator layer, thereby maintaining the scintillator's efficiency and image quality, while also allowing for the reuse of expensive photo-electric conversion substrates and reducing final product costs.
Implementation Method 1
a scintillator layer provided on the photo-electric conversion substrate and located in at least the detection area
Implementation Method 2
a light reflective layer provided between the scintillator layer and the moisture-proof cover, fixed to the moisture-proof cover
Implementation Method 3
a frame-shaped sealant located in the non-detection area, surrounding the scintillator layer, and adhered to the photo-electric conversion substrate; and a moisture-proof cover provided above the scintillator layer
Data Source
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AI summary
Provided is a radiation detector that is able to suppress the arrival of moisture on a scintillator layer. This radiation detector comprises a photoelectric conversion substrate, the scintillator layer, a frame-like sealing part adhered to the photoelectric conversion substrate, a moisture-proof cover, and a light reflection layer. The light reflection layer is provided between the scintillator layer and the moisture-proof cover, is fixed to the moisture-proof cover, and is positioned in at least a detection region of the photoelectric conversion substrate. The moisture-proof cover is adhered directly to the sealing part and covers the scintillator layer as well as the photoelectric conversion substrate and the sealing part.