Press Release

PowerLine F30 LP

DQ 010

PowerLine L400

Lasergeschweißte/lasergelötete Punkte

C LAS Selective Emitter Maschine mit PLL100 SHG von ROFIN

ROFIN at the EUPVSEC 2011 in Hamburg

From solar thin film laser processing to high volume production solutions for the cSi solar industry

Starnberg (Germany), 12th August 2011: ROFIN is the worldwide leader in development and manufacturing of industrial laser systems. With more than 35 years of experience in laser material processing ROFIN develops solutions for all industrial laser applications in solar cell manufacturing. At the EUPVSEC 2011 show ROFIN will be previewing new product innovations and high end industrial laser solutions for the solar industry and solar research and development customers.

More Productivity and Lower Costs for the Solar Thin Film Industry

ROFIN offers a wide range of laser sources for solar thin film edge deletion applications. The 1000 Watt DQ010 laser offers the highest available power in the laser market for edge deletion applications. This allows ultrafast processing of up to 80 cm²/sec and high productivity using power or time sharing concepts. The PowerLine L 400 introduced at EUPVSEC last year has established itself very well in the Asian market for small size panels. Both lasers feature the ROFIN top hat  beam profile to achieve the highest maximum efficiency per pulse.
The PowerLine SL series is now offered as a ready for integration package coming with all necessary beam optics and adjustable focus head. Installed on moving gantries this product has shown superior beam and pulse stability in hundreds of installations specifically for a-Si/µ-Si high volume manufacturing lines.
High Performance Laser Processing for Back-Contact Solar Cells Using Fiber Laser

Manufacturing advanced solar cell concepts like MWT or EWT cells need innovative laser concepts. The easy automation of laser processing and low manufacturing costs of laser tools are key functions for a sunny future of the solar cell industry.
ROFIN introduces the new fiber laser PowerLine F30 Long Pulse system at EUPVSEC 2011 which is combining high drilling performance on silicon solar cells with the lowest cost of ownership. By using optimal pulse length, high pulse energy and high TEMoo average power, the ROFIN PowerLine F30 LP realizes processing speeds of less than 1 wafer/sec for trepanning drilling on MWT cells.

Typically MWT solar cells also require cell edge respectively via isolation. Another fiber based product, the Power Line F50 achieves best isolation values at the highest processing speeds with up to 1 m/s. This 50 Watt unit with pulse frequency up to 200 kHz extends the successful PowerLine F product family.  
Laser Welding of Cell/Module Connections

Today, contact-free infrared, hot air or laser soldering is used to connect tin-plated copper ribbons in solar module assembly. The fast and reliable bi-wavelength copper welding process  opens up new possibilities for flexible assembly of standard and back contact cells. Especially for MWT/EWT cells the laser welding process is a very attractive joining process in combination with a pre-patterned copper foil. In this way arbitrary interconnection patterns become an option avoiding lead (Pb) content and complying with RoHS directives.
More Cell Efficiency with Selective Emitter Technology Using ROFIN PowerLine L 100 SHG

ROFIN and Centrotherm have successfully developed the selective emitter technology using the PowerLine L 100 SHG (532 nm) from ROFIN. This laser- induced diffusion process of phosphor into the finger and busbar surface of the solar cell increases the cell efficiency by up to 0.4 %. The unique laser source with average power up to 100 Watts, ROFIN’s patent pending top hat profile and fast scanning technology finally paved the way to creating selective emitters in an economically viable way. The turnkey manufacturing equipment  has been operating successfully  at multiple customers with a throughput capacity per machine up to 2400 wafers/h. Due to its attractive cost structure and the minor changes compared to a standard production line, it offers an excellent way of improving cell efficiency with selective emitter technology and standard screen printing metallization.
 ‘The laser is a universal material processing tool, and is excellently suited for photovoltaics applications’ (Stephan Geiger, Managing Director ROFIN-BAASEL Lasertech.)
Petra Fischer
Marketing Communications
Telefon +49-(0)08151-776-4113