Laser Etching Patterns for RF-Transparent Coated Substrates
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Solution Overview
Problem
Existing methods for etching glass-making substrates with metallic coatings face challenges in efficiently reducing the shield effect to allow for effective radiofrequency signal transmission at an industrial rate.
Innovation Solution
A method involving a laser beam treatment unit that moves at velocities greater than the substrate velocity to etch patterns on the coating, alternating directions, and repeating patterns to ensure uniform coverage and minimize discontinuities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a laser beam is used to etch metallic coatings on substrates to reduce shield effect, then radiofrequency signal transmission is improved, but processing speed and industrial efficiency deteriorate
Solution Approach 1:
The laser beam path is segmented into multiple discrete points along each line to be etched. The beam sequentially etches at these segmented positions rather than attempting to etch entire lines continuously, enabling precise control and higher effective processing speed by optimizing the sequence and spacing of etching points.
Solution Approach 2:
The laser beam performs periodic etching actions at discrete points along the substrate scanning direction. By rhythmically activating the laser at specific intervals and positions, the system achieves efficient material removal while maintaining synchronization with substrate motion, thereby improving processing speed without sacrificing etching quality.
2Productivity
If the laser beam moves at high velocity to increase processing speed, then productivity is improved, but etching uniformity and pattern precision deteriorate
Solution Approach 1:
The system dynamically adjusts the laser beam velocity and activation timing based on real-time substrate position and etching progress. The beam velocity is modulated to maintain optimal interaction time at each etching point, ensuring uniform etching depth and pattern precision while maintaining high overall processing speed through intelligent speed variation.
Solution Approach 2:
The system incorporates feedback mechanisms that monitor substrate position, laser beam position, and etching progress. This feedback enables real-time adjustments to beam velocity and activation timing, ensuring that etching uniformity is maintained even at high processing speeds by compensating for variations in substrate motion and beam delivery.
3Manufacturing precision
If continuous line etching is performed to ensure complete coverage, then manufacturing precision is improved, but processing time and productivity deteriorate
Solution Approach 1:
Instead of etching every point along continuous lines, the system applies partial action by selectively etching only the most critical discrete points that provide sufficient signal transmission improvement. This selective approach achieves adequate pattern completeness with significantly reduced processing time compared to exhaustive continuous line etching.
Solution Approach 2:
Continuous etching lines are segmented into discrete etching points spaced at optimized intervals. This segmentation allows the system to achieve sufficient pattern coverage and signal transmission improvement without the time penalty of continuous scanning, as the spaced points collectively provide the necessary shield effect reduction.
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 efficient etching of large substrates with metallic coatings, reducing shield effects and enhancing radiofrequency signal transmission capabilities while maintaining high processing speeds.
Implementation Method 1
producing a first pattern M1 by using the method as according to the method for etching a pattern of the invention, the first pattern having a first line p1 of a length l1 between an etching start point PD1 and an etching end point PA1
Data Source
AI summary
A method for treating a coating on a scrolling substrate by a treatment unit generating a laser beam, the method including producing a pattern including several lines or portions extending in the scrolling direction and/or the direction orthogonal to the scrolling direction, the pattern being repeated to cover treat the surface of the substrate.