E-Beam Detector Pixel Segmentation for Resolution-Speed Switching
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Solution Overview
Problem
Conventional detectors for charged particle beam tools lack the ability to optimize operating modes for enhanced signal processing speed and resolution, leading to degraded performance in either mode due to fixed sensing element sizes and parasitic effects.
Innovation Solution
A charged particle detector is designed with sub-sensing elements that can operate in a picture mode for higher resolution and switch to a beam mode for improved processing speed, minimizing parasitic effects by structuring each sensing element to break into smaller arrays during picture mode and function as a single element in beam mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the detector uses fixed sensing element sizes, then the device complexity is reduced, but the measurement precision deteriorates in different operating modes
Solution Approach 1:
Each sensing element is divided into multiple sub-sensing elements (e.g., 2x2, 3x3, or 4x4 arrays). During picture mode, the detector operates with higher resolution by utilizing the individual sub-sensing elements. During beam mode, the sub-sensing elements are combined to function as a single sensing element, reducing parasitic effects and improving processing speed. This segmentation allows the detector to adapt its effective resolution based on operating mode without requiring physically different detector structures.
Solution Approach 2:
The detector implements dynamic reconfiguration of sensing element groupings based on operating mode. Control circuitry dynamically adjusts the readout configuration to either access individual sub-sensing elements (picture mode) or combine them into larger effective elements (beam mode). This dynamic adaptation enables the detector to optimize between resolution and processing speed without physical reconfiguration.
2Measurement precision
If the detector operates in picture mode with high resolution, then the measurement precision is improved, but the productivity decreases due to slower processing speed
Solution Approach 1:
The detector dynamically switches between two operational configurations: picture mode with high resolution using individual sub-sensing elements, and beam mode with faster processing by combining sub-sensing elements. This dynamic reconfiguration allows the system to select the appropriate resolution-speed tradeoff based on the specific application requirements, achieving both high resolution when needed and fast processing when required.
Solution Approach 2:
The detector changes operational parameters (effective sensing element size, readout configuration, parasitic effect compensation levels) based on the selected mode. In picture mode, parameters are optimized for maximum resolution with smaller effective pixel sizes. In beam mode, parameters are adjusted to combine sub-sensing elements into larger effective elements, reducing parasitic effects and improving signal-to-noise ratio while increasing processing speed.
3Productivity
If the detector combines multiple sensing elements to improve processing speed, then the productivity is improved, but the measurement precision deteriorates
Solution Approach 1:
The sensing elements are segmented into sub-elements that can be independently addressed or combined. When processing speed is prioritized (beam mode), multiple sub-sensing elements are combined into larger effective elements, which reduces the total number of readout channels and parasitic effects, thereby improving processing speed. When resolution is prioritized (picture mode), the sub-elements are addressed individually to maintain high spatial resolution.
Solution Approach 2:
The detector structure serves multiple functions through the same physical hardware. The array of sub-sensing elements can function either as individually addressable high-resolution pixels or as combined lower-resolution elements with reduced parasitic effects. This multi-functionality allows a single detector design to optimize for either resolution or processing speed depending on operational requirements.
4Measurement precision
If the detector uses smaller sensing elements for higher resolution, then the measurement precision is improved, but parasitic effects increase leading to degraded performance
Solution Approach 1:
The detector uses an array of sub-sensing elements within each sensing element. During beam mode, multiple sub-elements are combined to form a larger effective sensing element, which reduces the relative impact of parasitic effects associated with small element sizes. During picture mode, the sub-elements are used individually to achieve high resolution, and parasitic effects are managed through the increased number of available elements for statistical averaging and signal processing.
Solution Approach 2:
Multiple sub-sensing elements are merged to function as a single sensing element during beam mode. This combining reduces the total number of readout channels and associated parasitic effects, improving signal-to-noise ratio and processing efficiency. The merging allows the detector to overcome the parasitic effects that would otherwise limit the performance of small individual sensing elements.
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 detector achieves higher resolution in picture mode and faster processing speed in beam mode without significant parasitic effects, optimizing performance based on the operating requirements.
Implementation Method 1
a first plurality of sub-sensing elements configured to convert a charged particle landing event into an electrical signal
Data Source
AI summary
A charged particle detector includes a plurality of sensing elements, with each sensing element being further divided into sub-sensing elements. The sub-sensing elements may be individually addressed during high-resolution image acquisition in a picture mode, and may be grouped together during high speed detection in a beam mode. The arrangement allows a selectable tradeoff between speed and resolution without introducing significant parasitic parameters.