Flexible Substrate Terminal Regions for Radiographic Imaging
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Solution Overview
Problem
Existing radiographic imaging apparatuses face challenges in reworking the connection of cables to flexible substrates due to deflection, making it difficult to detach and reconnect cables without damaging the terminal regions or substrate.
Innovation Solution
A radiation detector with a flexible substrate featuring terminal regions arranged along the outer edge, allowing for multiple connection points and flexible cable lengths to facilitate reworking, ensuring consistent distance between the circuit part and pixels regardless of reconnection attempts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a flexible substrate is used for the sensor board, then the weight of the radiographic imaging apparatus can be reduced and imaging of a subject becomes easy, but the reworking in the connection of the cables to the sensor board is not easily performed due to deflection of the substrate
Solution Approach 1:
The substrate is divided into a pixel formation region and a terminal region, with the terminal region positioned at the outer periphery. This segmentation allows the terminal region to be spatially separated from the pixel region, enabling cable connections to be made at the edges where access is easier even when the substrate is flexible and may deflect during operation.
Solution Approach 2:
The terminal regions are arranged along the outer peripheral edge of the substrate, transitioning from a distributed pattern across the surface to a concentrated arrangement at the boundary. This dimensional reorganization allows cable connections to be accessed from the perimeter, facilitating reworking without requiring access to the central pixel formation area, thus solving the problem of cable reconnection difficulty on flexible substrates.
2Reliability
If cables are connected to the substrate of the sensor board, then electrical charges accumulated in the pixels can be read, but deviation of the connecting positions or problems with mounted circuit parts require reworking which is difficult on flexible substrates
Solution Approach 1:
The terminal regions are pre-positioned at the outer periphery of the substrate before cable connection. This preliminary arrangement of terminal regions at accessible locations allows for easier cable attachment and future reworking, as the connection points are strategically placed at the edges where manipulation is simpler, even on flexible substrates that may deflect during use.
3Ease of manufacture
If terminal regions are formed on the first surface of the substrate, then connection to pixel groups is achieved, but access for cable connection and reworking becomes difficult
Solution Approach 1:
The terminal regions are relocated from the central pixel formation area to the outer peripheral edge of the substrate. This spatial reorganization maintains the electrical connection function while dramatically improving physical accessibility for cable connection and reworking operations, as the terminals are now positioned at the boundary where tools and hands can more easily access the connection points.
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
Facilitates easy reworking of cable connections to the substrate, reducing the risk of damage and maintaining image quality by keeping the circuit part at a constant distance from the pixels, thus preventing heat transfer and image artifacts.
Implementation Method 1
a plurality of pixels provided on a first surface of the substrate to accumulate electrical charges generated in accordance with light converted from radiation
Data Source
AI summary
A radiation detector includes a flexible substrate; a plurality of pixels provided on a first surface of the substrate to accumulate electrical charges generated in accordance with light converted from radiation; and a terminal region part formed with a plurality of terminal regions each including terminals connected to a predetermined pixel group including some of the plurality of pixels and formed on the first surface of the substrate.