Reconfigurable Detector Array With Integrated Pixel Switching
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Solution Overview
Problem
Existing electron detectors face challenges such as limited flexibility, high complexity, large dead areas, and manufacturing difficulties, which hinder their scalability and ability to provide comprehensive information about electron beam performance and sample properties.
Innovation Solution
A detector system with a substrate having a plurality of sensing elements and a switching region that connects adjacent elements, allowing for field reconfiguration and reduced dead areas, enabling high pixel counts without manufacturing complexities, and incorporating a circuit layer for signal processing and image reconstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a detector array with multiple sensing elements is used to provide spatial information and flexibility, then adaptability is improved, but device complexity increases due to the need for separate switch matrices and complex signal routing circuits
Solution Approach 1:
The patent merges the switch matrix functionality directly into the sensing element structure by integrating switching regions within the semiconductor substrate. This eliminates the need for separate external switch matrices and complex signal routing circuits, thereby reducing device complexity while maintaining the adaptability of reconfigurable pixel groups for different detection modes
Solution Approach 2:
The sensing elements are designed with multi-functionality, serving both as detection elements and as part of the switching network. The same semiconductor substrate hosts both the sensing pixels and the switching regions, allowing a single structure to perform multiple functions: signal generation, signal routing, and pixel group reconfiguration
2Manufacturing precision
If sensing elements are arranged in a grid with isolation areas to separate pixels, then manufacturing precision is improved, but the active detection area is reduced due to large dead areas between pixels
Solution Approach 1:
The isolation areas are merged with the switching regions in the semiconductor substrate. Instead of being separate structural elements that reduce active area, the isolation regions serve dual purposes: providing electrical separation between pixels and hosting switching functionality. This integration eliminates dead areas while maintaining pixel isolation and manufacturing precision
3Ease of manufacture
If a simple point detector arrangement is used, then ease of manufacture is improved, but measurement precision is reduced because spatial information is lost due to averaging over the whole active area
Solution Approach 1:
The detector is segmented into multiple discrete sensing elements (pixels) arranged in a grid pattern on the semiconductor substrate. Each pixel independently detects signals from specific beamlets, preserving spatial information. The segmented structure maintains manufacturing simplicity through standard semiconductor fabrication processes while enabling precise spatial resolution and beamlet-specific detection
4Productivity
If existing electron detectors are used to detect electron beams, then productivity is maintained, but loss of information occurs because these detectors cannot provide information about electron optical sub-system performance or compensate for drift and imperfections
Solution Approach 1:
The detector array provides feedback capability by enabling detection of electron optical sub-system performance through precise measurement of beamlet positions and intensities. The reconfigurable pixel groups allow the system to monitor drift and imperfections by comparing expected versus actual beam patterns, facilitating real-time compensation and correction of optical system deviations
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 system achieves high pixel counts with reduced manufacturing difficulties, facilitates wide band operation, and provides detailed information about electron beam spots and sample properties by eliminating the need for separate switch matrices and minimizing dead areas.
Implementation Method 1
each sensing element is configured to generate an electrical signal in response to detecting a respective one of the charged particles
Data Source
AI summary
Systems and methods for implementing a detector array are disclosed. According to certain embodiments, a substrate comprises a plurality of sensing elements including a first element and a second element, and a switching region therebetween configured to connect the first element and the second element. The switching region may be controlled based on signals generated in response to the sensing elements receiving electrons with a predetermined amount of energy.