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IRSA Final DR 18/12/09 09:32 Page 23
INSPECTION
POWERSCAN is then used directly after the
coating process to inspect whether the coating
was applied properly. This is typically followed by
the edge processing of the solar cells, which also
involves an inspection process of the corners and
edges. Further steps include the scribing, chemical
vapor deposition (CVD), cutting and lamination
processes. Each of these steps can conclude with
an inspection process so that at each step only
100% inspected merchandise arrives for further
processing throughout the entire front and back
end area. This assures that costs for the
production of thin film modules are reduced
considerably.
POWERSCAN can be used to inspect all of today's
and the future's glass and module sizes quickly
and at highest resolutions. Because of the modular
systems that can easily be integrated into a variety
of different production stages, every customer is Maximize the rate of return of production Exact 100% inspection
supplied with a customized solution. As far as the systems at all processing
camera modules in use are concerned, the The POWERSCAN system is so flexible that it can stages in thin-film
systems are scalable, which makes it possible to also be used successfully in other fields of the photovoltaic module
satisfy any requirement. photovoltaic industry. ISRA inspection tools, which production – from front
have been considered a proven technology for a to back end - assures
Simple, reliable and precise defect long time in many different areas, such as for higher yield, higher
classification inspecting optical display films, thin films or in energy efficiency, and
Because of the extremely high resolution in the µm glass inspection technology, is not only the better customer
range, even the smallest defects are detected selection of choice when it comes to quality control acceptance
23
reliably at a maximum sheet width and at highest and process optimization in the production
production speeds. High-resolution high speed processes of thin-film solar, such as CIS, CIGS,
www
cameras provide crystal clear images of any CSG and CdTe, and also of solar wafers for
.solar
defects and the QUICKTEACH function allows inspecting defects in the coating, structure, edges
them to be categorized easily, reliably and exactly. and other typical glass defects.
-pv-management.com
The state-of-the-art teaching classification software
processes the inspection data in real-time. It is also the product of choice for inspecting solar
QUICKTEACH allows a “learning by showing” modules (inspecting for completeness, position,
process: The software needs only to be taught the size, geometry and glass defects) and cover glass
products and the names of the defect types once (inspecting for glass and edge defects as well as
and no expert knowledge is required. size/dimension errors).
Issue VI 2009
Data and images of all significant defects are
stored to be analyzed at a later time and can be A big problem for
called up during the processes with one click of quality, not for
the mouse. The information collected in this way POWERSCAN:
can be used for optimizing the production process. patches
This makes it possible to ideally configure the
production processes. The customers benefit from
thin film solar cells of top quality.
Typical defect,
detected by
POWERSCAN:
pinholes
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