Infrared Radiator Array Spectrum Control for Substrate Processing
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Solution Overview
Problem
Existing infrared heating devices for modifying substrates, such as those used in drying and sintering processes for printed electronics, require frequent and costly conversions to accommodate different substrates due to limitations in adjusting irradiation power and spectrum, leading to inefficiencies and potential damage from excessive heating.
Innovation Solution
The method involves specifying a target radiation spectrum and determining individual operating powers for infrared radiators, allowing for a mixed spectrum and total irradiation power adjustment within a 15% margin, using multiple radiators with adjustable temperatures to achieve the desired emission spectrum and power, while maintaining identical radiator construction for cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the irradiation power of infrared radiators is increased to achieve quick irradiation, then the irradiation speed is improved, but the substrate may be damaged due to excessive heating
Solution Approach 1:
The irradiation system is divided into multiple independently controllable infrared radiators, each capable of being controlled individually in terms of power output and spectral characteristics. This segmentation allows precise control of total irradiation power while maintaining high productivity through coordinated operation of multiple radiators.
Solution Approach 2:
The system enables dynamic adjustment of operating parameters including irradiation power, temperature, and spectral distribution for each radiator. By changing these parameters individually or in combination, the system optimizes irradiation efficiency while preventing substrate damage through precise power control.
2Adaptability or versatility
If different infrared heaters with different emission spectra are used to irradiate different substrates, then the adaptability to various substrates is improved, but the device complexity and cost increase
Solution Approach 1:
The invention makes each infrared radiator capable of emitting multiple spectral ranges by controlling operating temperature. This multi-functionality allows a single radiator type to serve multiple substrate types, eliminating the need for maintaining an inventory of different radiator models while achieving full adaptability.
Solution Approach 2:
The system dynamically adjusts the spectral output of each radiator by varying operating temperature in real-time. This dynamic capability allows the same physical radiator to adapt its emission spectrum to match different substrate requirements, providing versatility without increasing hardware complexity.
3Adaptability or versatility
If infrared heaters are converted to accommodate different substrates, then the adaptability is improved, but the changeover time affects productivity
Solution Approach 1:
The system uses dynamic control of radiator operating parameters rather than physical conversion. By adjusting temperature and power settings, the system adapts to different substrates instantly without requiring changeover time, thus maintaining high productivity while achieving full adaptability.
4Measurement precision
If multiple infrared radiators with individual control are used to achieve target radiation spectrum, then the spectral precision is improved, but the control complexity increases
Solution Approach 1:
The control system continuously monitors the combined radiation spectrum from all radiators and adjusts individual radiator parameters accordingly. This feedback mechanism automates the complex coordination required to achieve target spectral precision, reducing the perceived complexity while maintaining high measurement and control accuracy.
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 approach enables efficient and cost-effective operation by allowing quick conversion to new modes, optimizing irradiation processes, and preventing substrate damage through precise power and spectrum control, thereby enhancing productivity and reducing the need for multiple infrared heaters.
Implementation Method 1
infrared radiators for irradiating the substrate
Implementation Method 2
The infrared heater's light tube is filled with an inert gas
Implementation Method 3
a heating element, for example in the form of a carbon band or a tungsten wire, is arranged
Data Source
Figure 1~2
Figure 3
AI summary
Known methods for operating a device for modifying a substrate by irradiating with infrared radiation, comprising an irradiating unit in which multiple cylindrical infrared emitters with longitudinal axes arranged parallel to one another are grouped together, comprise the method steps of: (a) specifying the total radiation output in dependence on the modification of the substrate to be achieved, (b) operating the infrared emitters with a respective desired operating output. In order on this basis to provide an efficient operating method which makes it possible for the device to be easily and quickly converted to a new operating mode and at the same time makes it possible for the device to be operated easily and at low cost, it is provided according to the invention that (c) a desired radiation spectrum is specified in dependence on the modification of the substrate to be achieved, and that (d) the respective desired operating outputs of the infrared emitters are individually chosen such that, when they are added, the desired radiation spectrum and the total radiation output are obtained, (e) with the proviso that the infrared emitters are of an identical construction and that the total radiation output deviates by a maximum of 15% from a specified desired value.