PV PROCESSEQUIPMENT
DEK Solar www.deksolar.com
PV3000
DEK is a global provider of next-generation technologies and process support to solar cell manufacturers with solutions that include modular metallization platforms, precision screens and materials applications used in back side field coating, current- collector pattern and termination deposition for photovoltaic substrate production.
DEK recently developed an all-new product and process solution for the metallization of silicon solar cell wafer substrates. Metallization is the process of applying aluminium- based and silver-based materials to the front and back sides of a silicon photovoltaic wafer, in order to effect an electrical connection once these materials are fused to the wafer surface in a furnace.
PV3000
DEK's PV3000 screen printing platform is a very high throughput complete metallization solution. Deploying multiple print heads operating in parallel, the display will show visitors how, if one head halts for operator attention, the others will continue to print - virtually eliminating downtime. Delivering six-sigma repeatability for capability in advance of current solar cell requirements, the platform's inherent accuracy and repeatability is ideal for demanding technologies such as selective emitter and progressive techniques such as print-on-print. Indeed, with these processes fast-becoming industry standard, the PV3000
Despatch Industries www.despatch.com
Portfolio of tools
Despatch's portfolio of tools for solar cell manufacturing includes: the world's best-selling firing furnace; an integrated, in- line diffusion system with phosphorus doper; an in-line rapid thermal shock to remove the bow from fired cells; and a point-of- generation VOC thermal oxidizer abatement tool. In addition to equipment, Despatch runs an Innovation Center that is equipped with process tools and metrology specific to the manufacturing and performance analysis of photovoltaic cells.
UltraFlex Dryer and Firing Furnace with Microzone Technology
Despatch's NEW UltraFlex is a state-of-the-art dryer and firing furnace designed to provide next generation capabilities in performance, profile flexibility and reduced cost of ownership. The new furnace features custom lamps and a furnace chamber design optimized for maximum absorption of energy into the cell. New Microzone technology enables infinite profile flexibility capable of adapting to ever-changing production needs. And the included Thermal Oxidizer provides virtually maintenance free elimination of VOCs. In addition to these exceptional performance capabilities, all models feature an enhanced
graphical user interface, eye-level electronics access, and patented push-button chamber access. For highly efficient solar cells at the lowest possible cost, more solar manufacturers choose Despatch Firing Furnaces than any other brand.
VOC Thermal Oxidizer
Despatch's VOC Thermal Oxidizer was designed to eliminate over 99% of Volatile Organic Compounds (VOCs) from gasses exhausted during the drying step of solar cell manufacturing.
The solar cell manufacturing process creates unwanted environmental pollutants which are by products of the drying process, and contain the non metallic ingredients found in the paste material such as ethanol, Texanol and terpineol. These pollutants can condense inside facility ductwork and create hazardous conditions.
Destroying the VOCs using the Oxidizer eliminates the need to collect and dispose of this waste in a separate process. The exhaust exiting from the VOC Thermal Oxidizer contains only small amounts of CO2 and water vapour.
achieves print-on-print capability (PoP) - +/- 12.5 microns at 2 Cpk. Find out more about the company's ability to provide solutions for print-on-print to substantially extend productivity and end-of-line yield. Ideal for solar manufacturers looking to enhance cell efficiency and drive down cost-per-watt, print-on- print is designed to give finer grid lines more height, printing the lines twice over to enhance current-carrying capacity without shadowing underlying silicon substrate.
Repeatable accuracy is the enabler here since even the slightest misalignment can result in printing paste flooding out and ruining the entire cell. Backed by DEK's experience in process design and control, the PV3000 is equipped to deliver repeatable accuracy without compromise. Robust chassis technology and vibration-tested one-piece construction for exceptional rigidity and mechanical integrity further reinforce the PV3000's inherent precision, future-proofing print alignment accuracy going forward.
DEK Solar is committed to pioneering advances in every aspect of the industry's quest to reach grid parity. DEK is investigating a number of techniques which could extend the commercial potential of photovoltaic production into the future. Generating optimal commercial efficiency on a single printer is one of the ways manufacturers can drive costs down even further.
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www.solar-pv-management.com Issue II 2010
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