Substrate Position Imaging With Pulsed LED Synchronization
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Solution Overview
Problem
Existing deposition technologies face challenges in achieving precise positioning and imaging of substrates for high-precision inkjet printing, particularly in industries requiring small-volume material deposition, as conventional vision systems for substrate positioning are time-consuming.
Innovation Solution
A deposition device equipped with a substrate support and an imaging system comprising an LED light source and an imaging unit, which uses LED light sources to capture images quickly and accurately by emitting short pulses of radiation synchronized with substrate movement, allowing for precise substrate positioning and imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional vision systems using cameras are used to photograph and determine substrate position, then substrate positioning precision is improved, but image capture time increases
Solution Approach 1:
The patent employs pulsed LED illumination instead of continuous lighting, activating the light source only during the brief moment when the substrate feature passes through the illumination field. This periodic action reduces image capture time while maintaining positioning precision, as the imaging unit captures images only during these pulsed illumination intervals rather than continuously.
Solution Approach 2:
The system rushes through the imaging process by using fast pulsed LED illumination and capturing images only during the brief transit time of the substrate feature through the illumination field. This approach skips unnecessary continuous imaging, reducing overall capture time while still achieving the required positioning precision through targeted snapshots.
2Productivity
If substrate imaging is performed during movement, then productivity is improved, but image quality and positioning accuracy deteriorate
Solution Approach 1:
The system uses synchronized pulsed illumination that activates precisely when the substrate feature is at the optimal position in the illumination field, regardless of substrate movement speed. This periodic synchronization allows high-speed imaging while maintaining position determination accuracy, as each pulse captures a clear reference point for positioning calculations.
Solution Approach 2:
The imaging system provides feedback by capturing substrate position information during movement, which is then used to adjust and determine precise substrate positioning. The captured images during transit provide real-time position data that enables accurate positioning determination even while the substrate is moving at high speed.
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
Enables rapid and precise determination of substrate position, facilitating high-precision deposition by minimizing image capture time and substrate movement during imaging, thereby improving the accuracy of material placement.
Implementation Method 1
an imaging unit disposed to capture radiation reflected through the optical assembly
Implementation Method 2
the imaging system comprising an LED light source
Data Source
AI summary
A deposition device is described. The deposition device has a substrate support and an imaging system disposed to image a portion of a substrate positioned on the substrate support. The imaging system comprises an LED light source and an imaging unit, and is coupled to a deposition assembly disposed across the substrate support.