Multi-Beam Laser Scribing for Precise Thin-Film Solar Cell Lines
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Solution Overview
Problem
The manufacturing process of thin-film solar cells requires precise laser scribing, but existing laser scribing equipment is costly and inefficient, particularly due to the need for multiple scribing steps with high straightness and parallelism requirements.
Innovation Solution
A multi-beam laser scribing method using a laser scribing system that includes a laser, optical path unit, beam splitter assembly, laser-focusing scribing head assemblies, motion module, and drive module, allowing for the simultaneous use of multiple scribing beams and flexible switching between different beam configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple scribing devices are integrated to simultaneously perform scribing, then production efficiency is improved, but device complexity increases
Solution Approach 1:
Multiple laser scribing devices are integrated into a single unified system that performs scribing operations simultaneously on thin-film solar cells. The system combines multiple laser sources, beam splitter assemblies, and focusing scribing head assemblies into one coordinated unit, enabling parallel scribing of multiple lines while managing the inherent complexity through systematic integration
Solution Approach 2:
The laser beam is divided into multiple sub-beams using beam splitter assemblies, which then are directed to separate focusing scribing head assemblies. This segmentation of the optical path allows a single laser source to create multiple scribe lines simultaneously, improving productivity while avoiding the need for proportionally more complete scribing devices
2Productivity
If the number of scribing beams is increased, then production efficiency is improved, but manufacturing cost increases
Solution Approach 1:
The laser scribing system is designed with multi-functionality, where a single integrated system can perform multiple scribing operations with different beam configurations. The system can adjust the number of active beams (4-12 beams) based on production requirements, allowing one device to replace multiple simpler devices and reducing overall manufacturing cost while maintaining high productivity
Solution Approach 2:
The system incorporates dynamic beam switching capability through beam splitter assemblies and movable components, allowing the number of active scribing beams to be adjusted during operation. This dynamic configuration enables the system to optimize between productivity and cost by selecting appropriate beam numbers based on real-time production needs
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 method significantly improves production efficiency and product quality by enabling high-speed and precise scribing of thin-film solar cells, while reducing costs through the use of modular and efficient laser scribing technology.
Implementation Method 1
a laser beam is output by a laser, and split by the optical path unit into two laser sub-beams, or two laser beams are output by two lasers, respectively, and reflected by two reflectors to enter two beam splitter assemblies; the laser beam is split by the beam splitter assembly into 4-12 laser sub-beams
Implementation Method 2
Each of the 1-4 laser-focusing scribing head assemblies is configured to output 6-12 focused laser beams to form a laser focus on the thin-film solar cell
Implementation Method 3
the thin-film solar cell is fixed on a carrying platform of the drive module by vacuum suction
Data Source
AI summary
A method for multi-beam laser scribing of a thin-film solar cell is provided. A laser beam output by a laser is split by an optical path unit or a splitter assembly into multiple sub-beams. The multiple sub-beams are focused by a laser-focusing scribing head assembly to form a laser focus on the thin-film solar cell. The thin-film solar cell is fixed on a bearing platform or clamped by a clamping mechanism, and driven by a drive module to reciprocate in a direction perpendicular to an output direction of the laser-focusing scribing head assembly to create a first scribe line. A position of the laser-focusing scribing head assembly is switched, and the thin-film solar cell is driven to reciprocate again to create a second scribe line. The fume and dust generated during the scribing process are removed through a fume-fume-dust extraction port corresponding to the scribing head assembly.