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EU PVSEC
BASF to present new process chemicals
At BASF’s booth B6/39 in Hall B6 BASF silver conductive pastes are also suitable
experts will present in addition to for use in conventional wafer production
SELURIS, a range of chemical solutions (screen printing process).
for wafer processing, a new laser printing With the new COLO-Fast polyurethane
technology and the silver conductive casting system, BASF’s subsidiary
pastes specifically designed for it as well Elastogran offers quick, economical and
as COLO-FAST, a UV-stable polyurethane secure framing of photovoltaic and solar
system for the frames of photovoltaic and panels. The UV-stable PU system is able
solar panels. to replace the aluminum frames normally
used in the past and opens up a variety
With the Seluris range of products, of frame design opportunities for
BASF offers a solution for cutting, chemical solutions to optimize the customers: the PU casting system is
etching, texturing and doping mono- and production processes and increase the poured directly onto the solar cells.
polycrystalline solar cells. The special efficiency of solar cells, which will mean
feature of Seluris is that, under this greater profitability for customers. These Production is by way of the process
name, the company is bringing together solutions include, for, improved cutting known as reaction injection molding (RIM
chemicals that are specifically geared to fluids, with which wafers can be cut even process). Here, the solar cells and solar
the solar cell manufacturing process. The more quickly and thinner. panels are placed into a closed mold and
purity levels are tailored for use in solar COLO-FAST is injected through a mixing
cell production. BASF will also, for the first time, be head. After a reaction time of just 30
presenting the contactless digital laser seconds the framed panel can be
Within the solar cell manufacturing transfer printing process developed by removed and used immediately.
process, BASF cutting fluids are used as the company as well as the
cooling and lubricating agents when the corresponding lead-free pastes for the Apart from the greater design freedom for
wafers are sawn from the high-purity metallization of wafers/solar cells. This solar and photovoltaic modules, COLO
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silicon blocks. Special etching and new process for crystalline solar cells -FAST provides faster production
texturing chemicals eliminate the saw reduces the breakage rate during times, better edge protection, extreme
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damage and the “patterning” created on metallization and enables customers to resistance to weathering and high UV
.solar
the wafer surfaces. High-purity handle even thinner solar cells (below 180 resistance. Consequently, very flexible
phosphorus oxychloride (POCl3) from a Ìm). Further advantages are the shapes can be cast, different shades of
-pv-management.com
new production plant is used for environment-friendly lead-free paste colour achieved and – according to the
subsequent doping of the wafers. technology and a simplified process with customer’s particular requirements – light,
The company is working on, new high throughput. Beyond that, the new thinner or thicker frames produced.
Pall Corporation showcases
Issue V 2009
The Pall display will feature a fully systems return on investment is typically
automated membrane filtration system for under two years,” said Lothar Dalitz,
the recovery of spent process water from market segment leader.A comprehensive
silicon ingot shaping and wafer rinse survey on “Waste treatment and
operations. At the heart of the Pall system reclamation of reusable materials in
is a dynamic membrane filtration unit manufacturing of cSi PV wafers” will be
enabling complete clarification of process presented by Prof. Dr.-Ing. Rolf Berndt,
fluids. The modular system design allows Jochen Ruth, Dipl.-Ing., and Steve
flexible adaptation to various process Waters, BSc (Hons). The visual
tools. The result is reduced water presentation, number 2CV.1.80, will be
consumption, increased cutting and held on Wednesday, September 23rd
grinding speed, improved wafer surface from 8:30-10:10 a.m. in the poster area at gases used in Czochralski (CZ) ingot
quality, reducedequipment fouling and the 24th EU PVSEC. In addition to pullers and in sputtering, thermal
easier reclamation of silicon dust. automated water and material reclamation deposition and distribution equipment.
systems, Pall offers systems to clarify Another Pall exhibit will highlight
“Water reclamation and reuse in ingot polyethylene glycol (PEG) for the Blowback Filtration Systems for the
shaping operations significantly reduces regeneration of sawing slurries. protection of CZ ingot puller
costs and maximizes the utilization of vacuum pumps. Pall will also showcase a
source materials, while enabling Pall will also display its range of products range of filters and uniquely designed
discharge regulations to be met. The for the filtration and purification of process housings for chemical and water filtration.
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