Radiation Detector Reinforcing Substrate Segmentation
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Solution Overview
Problem
Radiation detectors with flexible base materials face challenges in maintaining bending stiffness, especially near terminals, due to heat applied during electrical connections, which can cause deformation of reinforcing substrates.
Innovation Solution
A radiation detector design with a reinforcing substrate provided on a surface opposite to the terminal area, excluding the region facing the terminal, to enhance bending stiffness while minimizing heat-induced deformation, and optionally incorporating cutouts or gaps to further reduce heat propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a reinforcing substrate is provided on the entire second surface to increase bending stiffness, then the bending stiffness of the base material is improved, but the reinforcing substrate deforms due to heat propagated from the terminal during heat treatment
Solution Approach 1:
The reinforcing substrate is divided into multiple regions: a first region that extends to the side provided with the terminal to reinforce bending stiffness, and a second region that excludes the facing region to avoid heat-induced deformation. This segmentation allows different portions of the reinforcing substrate to serve different functions - structural reinforcement where needed and heat avoidance where necessary.
Solution Approach 2:
The reinforcing substrate is designed with non-uniform properties across its surface. The first region has full reinforcing properties to provide bending stiffness, while the second region excludes the facing region to prevent heat deformation. This local differentiation optimizes the overall performance by placing reinforcement only where it is most needed while avoiding problematic areas.
2Reliability
If heat treatment is applied to the terminal for electrical connection, then the electrical connection is achieved, but the heat is propagated to the reinforcing substrate causing deformation
Solution Approach 1:
The reinforcing substrate is segmented to exclude the facing region, creating a thermal barrier that prevents heat propagation from the terminal to the reinforcing substrate during heat treatment, while maintaining electrical connection reliability in the first region.
Solution Approach 2:
The base material acts as an intermediary layer between the terminal and the reinforcing substrate. By designing the reinforcing substrate to exclude the facing region, heat from the terminal is blocked from directly reaching the reinforcing substrate, allowing heat treatment to proceed without causing deformation.
3Weight of moving object
If the flexible base material is used to make the radiography apparatus lightweight, then the weight is reduced and imaging is facilitated, but the bending stiffness is insufficient especially near the terminal
Solution Approach 1:
The reinforcing substrate is segmented to extend to the side provided with the terminal, providing localized bending stiffness reinforcement exactly where the flexible base material is most prone to deformation, while maintaining the overall lightweight flexible structure.
Solution Approach 2:
The radiation detector combines the flexible base material with a reinforcing substrate to create a composite structure. This composite design maintains the lightweight and flexible properties of the base material while adding bending stiffness through the reinforcing substrate in critical areas.
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 design achieves high bending stiffness and suppresses deformation of the reinforcing substrate due to heat applied during terminal connections, ensuring the radiation detector's structural integrity and image quality.
Implementation Method 1
a conversion layer such as a scintillator for converting radiation into light
Data Source
AI summary
The radiation detector includes a sensor substrate and a reinforcing substrate. In the sensor substrate, a plurality of pixels for accumulating the charges generated according to light converted from radiation are formed in the pixel region on the first surface of the flexible base material, and the terminal for electrically connecting a flexible cable to the first surface is provided. The reinforcing substrate is provided on the second surface opposite to the first surface of the base material in a region excluding at least the facing region facing the terminal to reinforce the stiffness of the base material.