Detection Substrate with Segmented Photoelectric Layer for X-Ray Imaging
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Solution Overview
Problem
Traditional X-ray detection technologies suffer from low resolution and image quality due to the presence of additional electric fields and carrier generation in gap regions between detection pixels, leading to reduced space resolution and ghost shadows.
Innovation Solution
A detection substrate is designed with a ray absorption layer positioned over the gaps between first electrodes, minimizing carrier generation and absorption of X-rays, while maintaining high space resolution and detection sensitivity by overlapping the ray absorption layer with the gaps between electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a photoelectric conversion layer is arranged over the entire surface including gap regions between electrodes, then the detection area is increased, but carrier generation in gap regions causes reduced space resolution and ghost shadows
Solution Approach 1:
The detection substrate is segmented into active detection regions (over electrodes) and inactive gap regions (between electrodes). The photoelectric conversion layer is selectively positioned only over the electrode regions, while the gap regions are left without photoelectric conversion material, thus preventing carrier generation in gaps while maintaining detection area over electrodes.
Solution Approach 2:
Different regions of the detection substrate are given different properties: the electrode regions have photoelectric conversion layer for detection, while the gap regions have no photoelectric conversion layer to avoid unwanted carrier generation. This local differentiation resolves the contradiction by making each region's quality match its functional requirement.
2Stability of the object's composition
If additional electric fields are present in gap regions, then the structural integrity is maintained, but carrier generation leads to ghost shadows and reduced image quality
Solution Approach 1:
The photoelectric conversion layer is extracted from the gap regions, leaving only the electrode regions with this functional layer. This removes the source of unwanted carrier generation in gaps while preserving the electrode structure and its electric fields for actual detection purposes.
3Reliability
If the photoelectric conversion layer covers the entire surface, then the detection sensitivity is improved, but carrier generation in gap regions reduces image quality
Solution Approach 1:
The detection substrate is segmented into active detection regions (over electrodes) and inactive gap regions (between electrodes). The photoelectric conversion layer is selectively positioned only over the electrode regions, while the gap regions are left without photoelectric conversion material, thus preventing carrier generation in gaps while maintaining detection area over electrodes.
Solution Approach 2:
Different regions of the detection substrate are given different properties: the electrode regions have photoelectric conversion layer for detection, while the gap regions have no photoelectric conversion layer to avoid unwanted carrier generation. This local differentiation resolves the contradiction by making each region's quality match its functional requirement.
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 solution effectively reduces carrier generation in gap regions, maintaining high space resolution and preventing ghost shadows, thus enhancing the detection sensitivity and image quality without affecting the photoelectric detection efficiency.
Implementation Method 1
a photoelectric conversion layer arranged on a whole face of sides, facing away from the base substrate, of the plurality of first electrodes
Implementation Method 2
a ray absorption layer located on a side, facing away from the plurality of first electrodes, of the photoelectric conversion layer, wherein an orthographic projection of the ray absorption layer on the base substrate is overlapped with an orthographic projection of gaps between the first electrodes on the base substrate
Data Source
AI summary
The present disclosure provides a detection substrate, a manufacturing method thereof and a ray detector. The detection substrate includes: a base substrate; a plurality of independent first electrodes arranged on the base substrate on the same layer; a photoelectric conversion layer arranged on a whole face of sides, facing away from the base substrate, of the plurality of first electrodes; a ray absorption layer arranged on a side, facing away from the plurality of first electrodes, of the photoelectric conversion layer, wherein an orthographic projection of the ray absorption layer on the base substrate is overlapped with an orthographic projection of gaps between the first electrodes on the base substrate; and a second electrode arranged on a whole face of a side, facing away from the plurality of first electrodes, of the photoelectric conversion layer.