Radiation Image Conversion Panel Adhesion via Rough Metal Oxide
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Solution Overview
Problem
The existing radiation image conversion panels with metal oxide coating layers face issues with low adhesion to other members, leading to potential detachment, especially when used as a bonding surface, due to the low adhesion strength of the metal oxide layer.
Innovation Solution
The implementation of a radiation image conversion panel with a rough metal oxide layer surface to create an anchor effect with a first organic resin layer, along with additional features like a metal reflection layer and dielectric layer to enhance light output and protection, and using materials like ITO, FTO, SnO2, AZO, GZO, or IGZO for the metal oxide layer, which also addresses thermal expansion coefficient differences with the light detecting unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a metal oxide coating layer is formed on the surface to prevent foreign materials attachment, then the surface becomes resistant to dust and foreign materials, but the adhesion strength to other bonded members becomes low
Solution Approach 1:
The patent applies local quality by creating a metal oxide layer with non-uniform thickness, where the thickness varies across different regions of the coating layer. This allows different areas to have different properties: some regions provide enhanced foreign material resistance while other regions maintain good adhesion for bonding, thus resolving the contradiction between these two opposing requirements.
Solution Approach 2:
The patent changes the physical parameter of the metal oxide layer by controlling its thickness distribution. By forming a coating layer with varying thickness (non-uniform thickness), the optical properties and surface properties are modified locally, enabling the layer to simultaneously achieve foreign material resistance and adequate adhesion strength for bonding applications.
2Strength
If a rough surface is created on the metal oxide layer to enhance adhesion through anchor effect, then adhesion strength improves, but surface smoothness required for preventing foreign materials attachment may be compromised
Solution Approach 1:
The patent resolves this contradiction by applying local quality through spatially varying thickness in the metal oxide layer. Certain regions with specific thickness ranges provide the roughness needed for anchor effect and adhesion, while other regions maintain smoother surfaces that resist foreign material attachment, allowing both requirements to be satisfied simultaneously in different locations.
Solution Approach 2:
The patent employs composite material principles by creating a metal oxide layer with composite functional characteristics through thickness variation. The layer acts as a composite structure where different thickness zones provide different functions: adhesion-promoting rough surfaces in bonding areas and smooth foreign-material-resistant surfaces in other areas, effectively combining multiple functionalities in a single coating layer.
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 configuration significantly improves the adhesion strength between the metal oxide layer and the organic resin layer, enhances light output by reflecting light back to the output surface, and protects the panel from external factors, while minimizing the risk of detachment due to thermal expansion differences.
Implementation Method 1
since the surface of the metal oxide layer is a rough surface, it is possible to cause an anchor effect between the metal oxide layer and the first organic resin layer formed on the surface thereof and thus to enhance adhesion strength between the metal oxide layer and the first organic resin layer
Implementation Method 2
The light output from the fluorescent layer toward the substrate is reflected toward the light output surface by the metal reflection layer formed between the substrate and the metal oxide layer
Implementation Method 3
Light output from the fluorescent layer to the substrate is reflected toward the light output surface which is the top surface of the fluorescent layer by the dielectric layer
Data Source
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AI summary
A radiation image conversion panel 10 includes: a substrate 11; a metal oxide layer 15 formed on the substrate 11, including conductivity, and including a rough surface; a first organic resin layer 16 formed on the surface of the metal oxide layer 15; and a fluorescent layer 17 formed on the first organic resin layer 16, including a plurality of columnar crystals, and configured to emit light in accordance with incident radiation.