SOLAR INDUSTRY AWARDS I WINNERS
PV TOOL AWARD
Innolas solutions GmbH ILM-2 Laser Machine
INCREASING CELL EFFICIENCY is the most effective way to reduce the cost of solar power, and PERC (Passivated Emitter and Rear Contact) is one of the technologies that meet the balance between manufacturing cost and efficiency.
InnoLas used its 15 years of experience in laser processing for the PV industry to design the cost effective ILM-2 production platform for lowest maintenance costs and best Cost of Ownership in the market. The ILM-2 platform is further optimized for easy integration into existing production lines and reduces handling steps if integrated e.g. via conveyor interface prior to a screen printer line or directly after a passivation tool. Alternatively, it can be combined with an InnoLas high speed automation system and operated as a stand-alone tool. The output can be adjusted between 1,600 and 3,600 wafers per hour at an excellent uptime of >96%.
InnoLas Solutions sees increasing demand for PERC solutions that can be adapted flexibly to current and future production line designs and requirements. The company designed the ILM-2 as a modular machine concept that can be
used as a stand-alone or in-line system, with the option to use different laser sources. The ILM-2 offers our customers a future-proof 24/7 production solution with an excellent uptime.
This high volume production machine to open the passivation coating of PERC cells by a laser lift off process.
A local BSF and rear contacts are formed by controlling the interaction of the laser beam and the Si material at high process speed. The optimized laser and optical parameters of the system together with a new innovative dash pattern layout lead to a higher efficiency of solar cells compared to state of the art PERC process schemes.
Previous laser processes suffered from low throughputs and high cost due to limited process speeds as well as imperfect passivation layer openings. The ILM-2 comprises an improved laser and optical setup which allows perfect control of the contact opening at the highest process speed.
For the first time a novel dashed line pattern layout was enabled at high process speed enabling cell efficiency.
Markus Nicht, CEO of Innolas
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www.solar-international.net I Issue V 2014
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