Infrared Thermal Imaging Array Module Verification Architecture
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Solution Overview
Problem
The development of high-quality infrared thermal imaging array modules requires specialized expertise across multiple fields, and existing methods lack a comprehensive verification flow and integrated manufacturing method, leading to inefficiencies in performance optimization and increased research and development costs.
Innovation Solution
A verification architecture and method for manufacturing infrared thermal imaging array modules that includes specification design, epitaxy verification, fabrication processes for single-device-type sensing devices and focal-plane arrays, jointing with a read-out integrated circuit (ROIC), and integrated testing to ensure optoelectronic uniformity and thermal image quality, with iterative steps to optimize performance and reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional separate-field verification methods are used for infrared thermal imaging array modules, then individual component performance can be optimized, but overall module verification efficiency is low and development costs are high
Solution Approach 1:
The patent combines separate verification processes (optical characteristics, electrical characteristics, thermal characteristics, uniformity) into an integrated verification architecture that tests multiple parameters simultaneously on the complete array module, thereby improving verification efficiency and reducing development time
Solution Approach 2:
The verification architecture is designed to be universally applicable to different array types (e.g., different pixel counts, different detector materials) by using standardized test procedures and evaluation criteria that can accommodate various configurations without requiring separate verification methodologies
2Reliability
If comprehensive verification of all parameters is performed, then module quality is improved, but verification complexity and cost increase
Solution Approach 1:
The verification process is segmented into distinct test modules (optical verification, electrical verification, thermal verification, uniformity verification) that can be executed independently but contribute to comprehensive quality assessment, making the complex verification process more manageable and systematic
Solution Approach 2:
The patent establishes specific verification thresholds and pass/fail criteria for each parameter (e.g., detectivity D*≥1.0×10^11 cm·Hz^1/2/W, uniformity≥85%) that simplify the verification decision-making process while ensuring comprehensive quality control
3Manufacturing precision
If detailed optoelectronic uniformity testing is performed on focal-plane arrays, then sensing uniformity is improved, but manufacturing and testing time increase
Solution Approach 1:
The patent implements selective uniformity testing that focuses on critical regions and parameters (dark current uniformity, responsivity uniformity) rather than exhaustive testing of all pixels, achieving sufficient quality control while maintaining manufacturing efficiency
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
Enhances the performance and sensing efficiency of thermal imaging array modules, reduces research and development costs, and shortens the verification cycle time by ensuring compliance with specifications through a systematic verification process.
Implementation Method 1
gluing the completed epitaxy on an insulating base with heat-conducting glue
Implementation Method 2
infrared thermal imaging array module
Data Source
AI summary
The present invention relates to a verification architecture of an infrared thermal imaging array module, which includes the following steps. Perform specification design of thermal imaging module, epitaxy, and verification of optical characteristics for calibrating epitaxial parameters. Perform a fabrication process of single-device-type sensing device and verification of changing-temperature optoelectronic measurement by measuring and calibrating at low temperatures by changing temperatures and voltages. Perform a fabrication process of focal-plane array and verification of optoelectronic uniformity and test for dark-current uniformity. Perform a fabrication process and verification of jointing and thinning the focal-plane array and the ROIC. The focal-plane sensing module and the ROIC are jointed by indium bonding, and optoelectronic signal conversion is performed using the sensing array module. Perform the verification of integrated test on thermal image quality. Optimum driving and controlling output parameters are tuned for performing analysis and test on thermal image quality of the module. Manufacture the prototype of the thermal imaging array module, which is jointed with the focal-plane sensing array by indium bonding. Thereby, the prototype of the thermal imaging array module is completed.