Scintillator Transfer Layer for Moisture-Safe Radiation Imaging
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Solution Overview
Problem
The exposure of scintillators to outside air during the manufacturing process can lead to deliquescence, resulting in deterioration of their characteristics and a decrease in the resolution of radiation imaging apparatuses.
Innovation Solution
A manufacturing method where a sensor substrate and scintillator are bonded using a bonding member, with a moisture preventing layer formed on a support substrate to suppress water permeation, and the scintillator is separated together with this layer to prevent exposure to air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the scintillator is formed on a substrate and then separated from the substrate, then the substrate can be selected without considering radiation permeability and light reflectivity, but the scintillator surface exposed to outside air can deliquesce with water, deteriorating scintillator characteristics
Solution Approach 1:
A functional layer is introduced as an intermediary between the substrate and the scintillator. This functional layer includes a moisture preventing layer that suppresses water permeation to the scintillator, while allowing the substrate to be made of materials suitable for scintillator formation without considering radiation permeability. The functional layer acts as a protective mediator that prevents direct contact between the scintillator and moisture in outside air.
Solution Approach 2:
The scintillator is rapidly transferred from the substrate to the sensor substrate immediately after formation, minimizing the time the scintillator surface is exposed to outside air. This quick transfer process reduces the opportunity for deliquescence to occur, allowing the scintillator to be handled efficiently while maintaining its characteristics.
2Ease of manufacture
If the scintillator surface is exposed to outside air during manufacturing, then the manufacturing process is simplified, but the scintillator may deliquesce and the resolution of the radiation imaging apparatus decreases
Solution Approach 1:
The functional layer serves as a protective intermediary that allows the scintillator to be manufactured and handled with minimal exposure to outside air. The moisture preventing layer in the functional layer blocks water permeation, enabling simplified manufacturing processes without compromising the scintillator's resolution and characteristics.
3Ease of manufacture
If the scintillator is separated from the support substrate, then the scintillator can be bonded to the sensor substrate, but the separation process exposes the scintillator to outside air causing deterioration
Solution Approach 1:
The functional layer remains attached to the scintillator during separation from the support substrate, acting as a protective intermediary that prevents outside air contact. This allows the scintillator to be separated and bonded to the sensor substrate while the functional layer continues to suppress water permeation, maintaining scintillator characteristics throughout the bonding 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
This method effectively prevents scintillator deterioration and maintains the resolution of the radiation imaging apparatus by shielding the scintillator from moisture and impact, enhancing the reliability and performance of the device.
Implementation Method 1
a functional layer including a moisture preventing layer which suppress permeation of water
Data Source
AI summary
A manufacturing method of a radiation imaging apparatus in which a sensor substrate and a scintillator are bonded by a bonding member, is provided. The method includes: forming, on a support substrate, a functional layer including a moisture preventing layer configured to suppress permeation of water; forming the scintillator on the support substrate with the functional layer arranged thereon; and separating, from the support substrate, at least a part of the scintillator together with the functional layer.