Radiography Substrate Buffer Layer Foreign Substance Deformation
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Solution Overview
Problem
Radiography apparatus using flexible base materials for substrates face challenges with deformation under load due to lower rigidity, increasing the risk of substrate deformation and image artifacts from foreign substances during manufacturing and imaging, which complicates thinning while maintaining structural integrity.
Innovation Solution
Incorporating a buffer layer between the housing and substrate, specifically a porous member with a thickness of 0.06 mm to 0.6 mm, to absorb pressure from foreign substances and protect the drive and readout circuits, while maintaining the thinness and flexibility of the flexible base material substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a flexible base material is used for the substrate to reduce weight and thickness, then weight reduction and thinning are achieved, but the substrate becomes easily deformed under load due to lower rigidity
Solution Approach 1:
The substrate is segmented into multiple functional layers: a flexible base material layer for weight reduction, a reinforcement layer for improving rigidity, and a buffer layer for protecting against foreign substances. Each layer performs a specific function, allowing the overall structure to achieve both lightness and strength.
Solution Approach 2:
The substrate uses a composite structure combining flexible base material (such as polymer films) with reinforcement layers (such as rigid or semi-rigid materials). This composite approach allows the substrate to maintain flexibility and lightness while gaining the necessary rigidity to resist deformation under load.
2Length of moving object
If the substrate is thinned to reduce weight, then weight reduction is achieved, but the substrate becomes more susceptible to deformation from foreign substances
Solution Approach 1:
A buffer layer is introduced between the substrate and the housing to provide beforehand cushioning against foreign substances. This buffer layer absorbs and distributes the pressure from foreign substances before they can directly contact and deform the thinned substrate, preventing image artifacts while maintaining substrate thinness.
Solution Approach 2:
The buffer layer acts as an intermediary element between the housing and the substrate. It mediates the interaction by absorbing mechanical stress from foreign substances and preventing direct transmission of deformation forces to the thinned substrate, thereby protecting the substrate without requiring increased thickness.
3Reliability
If a buffer layer is added to protect against foreign substances, then protection against deformation is improved, but the overall thickness of the structure increases
Solution Approach 1:
The buffer layer is designed as a thin film or flexible layer that provides effective protection against foreign substance deformation while maintaining minimal thickness. This thin film approach allows the buffer layer to absorb and distribute pressure effectively without significantly increasing the overall thickness of the housing structure.
Solution Approach 2:
The thickness of the buffer layer is optimized within a specific range (0.06 mm to 0.6 mm) to achieve the right balance between protective function and thickness constraint. By carefully controlling the thickness parameter, the buffer layer provides sufficient protection against foreign substances while minimizing the increase in overall structure thickness.
4Strength
If multilayering is implemented to improve rigidity and heat dissipation, then structural performance is improved, but the gap between layers increases the possibility of foreign substance mixing during manufacture
Solution Approach 1:
Multiple layers (flexible base material, reinforcement layer, buffer layer) are merged into a single integrated substrate structure. This integration reduces the gaps and interfaces between separate components, thereby minimizing the risk of foreign substance contamination during manufacturing while maintaining the benefits of each individual 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
The buffer layer effectively reduces the impact of foreign substances on the substrate, preventing deformation and image artifacts, allowing for thinning of the radiography apparatus while maintaining structural integrity and protecting sensitive components from radiation.
Implementation Method 1
a first buffer layer which is disposed between the front portion and the substrate in a thickness direction of the housing, the first buffer layer having an outer circumference provided inside the pixel region of the substrate in a plan view
Data Source
AI summary
A radiography apparatus includes a substrate on which a pixel region in which a plurality of pixels that accumulate charges generated in response to incident radiations are arranged is formed on one surface of a flexible base material, a housing which accommodates the substrate and includes a front portion having an incident surface through which the radiations are incident on the substrate, a first buffer layer which is disposed between the front portion and the substrate in a thickness direction of the housing, the first buffer layer having an outer circumference provided inside the pixel region of the substrate in a plan view, and a structure which is disposed between the front portion and the substrate in the thickness direction at a position overlapping with the first buffer layer.