ROFIN’s PowerLine L Series lasers designed for large-scale solar cell manufacturing

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Product Briefing Outline: ROFIN has introduced a new laser series for high-speed micro material processing, with a special focus on photovoltaic manufacturing. The new PowerLine L series are q-switched solid-state lasers specifically designed for micro material processing applications, which require high average power and high pulse energy.

Problem: Compared to ROFIN's DQ series, which offers 500 to 1000W, the PowerLine L 300 features more than 200W of laser power at 10kHz with smaller optical fibers and an optimized 400μm-square fiber. Compared to round fibers, square fibers provide greater efficiency by machining a larger area per pulse  

Solution: Selective opening of dielectric layers and direct laser doping are popular topics of interest in solar cell manufacturing. For both applications, the frequency-doubled PowerLine L 100 SHG has already proven its suitability as a result of various research projects. The laser source offers optimum beam characteristics and sufficient power for large-scale production. Green lasers with 532nm show the desired near-surface absorption in silicon and can be equipped with a wide range of long-life optical components and fibers. With optimized fibers, a top-hat beam profile can be realized which provides homogenous energy distribution within the entire laser spot area.   

Applications: Thin film removal on glass and flexible materials, ablation of dielectric layers, silicon processing together with drilling and cutting operations.

Platform: The Nd:YAG (neodymium-doped yttrium aluminium garnet) lasers are efficiently diode-pumped and designed to be reliable within an industrial environment and 24/7 operation. The PowerLine L 100 SHG uses a high performance SHG assembly with harmonic generator crystal for frequency conversion. The principle of q-switching yields peak pulse performances 1000 times higher than those created by CW laser power. Standard configuration includes a fiber delivery to the processing head. Optional accessories include fiber outcoupling and scan head assemblies supporting scan speeds of > 10m/sec precision.

Availability: Currently available.

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