The InnoLas ILS TT laser processing system is designed to execute a variety of laser processing techniques such as Selective Emitter, Contact Opening, Junction Isolation, LFC, EWT and MWT to achieve improved cell efficiencies. A system for production scale manufacturing as well as pilot line research and development, the system is equipped with a high speed turntable and custom tooling to fit specific processing steps.

Problem

The production of premium crystalline silicon solar cells is facing several challenges: New techniques, to increase the efficiency and performance of photovoltaic solar cells, have to be developed and transferred into industrial mass production. Furthermore, the processing time has to be minimized in order to guarantee utmost throughput and a most cost efficient way of manufacturing.

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Solution

The InnoLas ILS TT laser system makes state-of-the-art laser processing technologies available to large scale production. The ILS TT is a highly flexible machine tool, which meets the high production demands of the PV industry, with respect to throughput, accuracy, productivity and reliability. All machine concepts can be used in pilot or mass production environments. This allows a direct progression from development and process optimization into new or existing production lines.

Applications

High speed laser processing of mono and multi-crystalline silicon solar cells.

Platform

The system offers the ability to integrate two laser sources in the same system for processing two individual cells simultaneously or to allow subsequent processing with different laser sources / wave lengths if two different laser sources are selected. This allows maximum flexibility and high throughput depending on the application (up to 3600 cells per hour maximum). Available laser sources include: Q-switch Nd:YAG, Nd:Vanadate, CO2 and Pico-second lasers.The appropriate laser source is chosen to meet the specific requirements of the application.