Inline Solar Cell Manufacturing Throughput Stabilization
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Solution Overview
Problem
In inline manufacturing of solar cell panels, the varying durations of treatment steps create bottlenecks, and existing methods struggle to efficiently manage processing throughput due to the need for consecutive treatments with different durations.
Innovation Solution
The method standardizes treatment step durations across subsequent stations by splitting longer treatments into sub-steps performed in multiple stations, allowing for flexible adaptation of processing intensity and enabling continued operation even if some stations are disabled, while looping substrates through stations to reduce the number needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If treatment steps are performed with their natural varying durations in inline manufacturing, then each treatment can be completed with appropriate processing time, but the overall throughput is limited by the longest treatment step creating a bottleneck
Solution Approach 1:
The patent divides treatment steps into standardized sub-steps of equal duration. Each treatment step is segmented into multiple identical sub-steps that can be performed in parallel or sequence across multiple treatment stations, eliminating the bottleneck caused by varying treatment durations and enabling standardized throughput.
2Productivity
If treatment steps are standardized to equal duration across all stations, then throughput becomes stable and predictable, but treatments requiring different processing times must be split into multiple sub-steps increasing system complexity
Solution Approach 1:
The patent creates universal treatment stations that can perform any treatment sub-step. Each station is designed with multi-functionality to execute standardized treatment protocols, allowing the same hardware infrastructure to handle diverse treatment requirements through software or process configuration rather than requiring dedicated equipment for each treatment type.
3Productivity
If multiple subsequent treatment stations are used to perform consecutive treatments, then throughput is improved by parallel processing, but the cost and space requirements increase with the number of stations
Solution Approach 1:
The patent implements a nested processing architecture where treatment stations are arranged in a compact, space-efficient configuration. Substrate carriers are nested or stacked in a way that allows multiple treatment stations to occupy minimal horizontal space while maintaining sequential processing capability, effectively nesting the processing sequence within a compact vertical or layered arrangement.
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 stabilizes throughput independent of treatment durations, enhances processing efficiency, and allows for the use of a variety of materials and layer structures, improving antireflection coatings and overall solar cell efficiency by optimizing layer deposition and substrate handling.
Implementation Method 1
deposition of a layer of SiN:H by one of chemical vapour deposition or physical vapour deposition on a silicon wafer
Implementation Method 2
deposition of a layer of SiN:H by one of chemical vapour deposition or physical vapour deposition on a silicon wafer
Data Source
AI summary
Throughput of manufacturing thin-film solar panels by inline technique is made substantially independent from the time extent of different surface treatment steps by accordingly subdividing treatment steps in sub-steps performed in inline subsequent treatment stations. Treatment duration in each of the subsequent treatment stations is equal(τ).