Radiation Detector Electrode Layout for Larger Effective Pixel Regions
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Solution Overview
Problem
Radiation imaging devices face challenges in expanding the effective pixel region due to gaps between radiation detectors caused by electrode structures, which restrict the number of pixels that can be effectively used for radiation detection.
Innovation Solution
A radiation imaging device design featuring a radiation detector with an electric charge generation part and a reading part, including an intermediate substrate with differently arranged electrodes that allow for increased freedom in pixel arrangement, enabling a larger effective pixel region without interference from signal processing parts on the lead-out substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple radiation detectors are disposed on a circuit board to increase the effective pixel region, then the number of pixels increases, but gaps are generated between adjacent detectors due to interfering electrode structures, reducing the effective pixel region
Solution Approach 1:
An intermediate substrate is introduced between the first substrate (electric charge generation part) and the second substrate (lead-out substrate). This intermediate substrate carries first electrodes that connect to the first substrate and second electrodes that connect to the second substrate, serving as a mediator that enables electrical connection while allowing flexible spatial arrangement. The intermediate substrate resolves the contradiction by decoupling the electrode arrangement constraints from the pixel arrangement, enabling closer detector placement without interference.
Solution Approach 2:
The patent transitions from a planar two-dimensional arrangement to a three-dimensional stacked structure. The first substrate, intermediate substrate, and second substrate are arranged in the vertical dimension (thickness direction), while electrodes are distributed across multiple layers. This dimensional transition allows electrodes to be positioned in three-dimensional space rather than competing for the same two-dimensional plane, enabling closer horizontal spacing of detectors while maintaining proper electrical connections.
2Reliability
If electrode structures are arranged to avoid interference between first and second electrodes, then electrical connection is maintained, but gaps are created between pixels that cannot be used for detection
Solution Approach 1:
Electrodes are distributed across three-dimensional space using the intermediate substrate. First electrodes are positioned on the intermediate substrate facing the first substrate, while second electrodes are positioned on the intermediate substrate facing the second substrate. This spatial distribution in the vertical dimension allows electrical connections to be made without requiring horizontal separation that would create gaps between pixels.
Solution Approach 2:
The intermediate substrate acts as a mediator that separates the first electrodes and second electrodes into different spatial zones. By routing connections through this intermediate layer, the patent enables electrical connectivity while allowing the pixel regions to extend closer together horizontally, as the electrode pathways are resolved in the vertical dimension through the intermediate substrate.
3Adaptability or versatility
If the arrangement interval of second electrodes is made different from the arrangement interval of first electrodes, then flexibility in pixel arrangement is increased, but electrode alignment complexity increases
Solution Approach 1:
The intermediate substrate serves as a flexible intermediary layer that can accommodate different electrode arrangements on its two faces. The first electrodes facing the first substrate can be arranged with one interval, while the second electrodes facing the second substrate can be arranged with a different interval. The intermediate substrate's wiring structure bridges these different arrangements, providing the adaptability needed for flexible pixel positioning while managing the alignment complexity through its mediating role.
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 effectively expands the effective pixel region by allowing for a more flexible arrangement of radiation detectors, increasing the number of pixels and minimizing gaps between detectors, thus enhancing the imaging device's detection capabilities.
Implementation Method 1
a first substrate that converts radiation into electric charge
Implementation Method 2
a first substrate that converts radiation into electric charge
Implementation Method 3
a reading part configured to output a digital value based on the electric charge
Data Source
AI summary
A radiation imaging device includes a radiation detector having an electric charge generation part configured to generate an electric charge corresponding to energy of incident radiation and a reading part configured to output a digital value based on the electric charge, and a circuit board in which a plurality of radiation detectors are disposed two-dimensionally. The reading part includes a lead-out substrate in which a plurality of signal processing parts are disposed two-dimensionally, and an intermediate substrate disposed between the electric charge generation part and the lead-out substrate. A plurality of first intermediate electrodes are disposed on an intermediate input surface. A plurality of second intermediate electrodes are disposed on an intermediate output surface. An arrangement interval of the second intermediate electrodes is different from an arrangement interval of the first intermediate electrodes.