COVERSTORY
provide the inspection result as well as the classification results back to the user while the inspected module is being unloaded.
Silicon ingot fabrication variations are diverse in terms of silicon grain boundaries. This turns out to be a difficult point to distinguish defects from solar cell grain boundaries pattern. Therefore, it is extremely difficult to develop a set of parameters that is able to inspect defects for all solar cell patterns. In this case, we opened a full range of inspection parameters to the machine administrator in order to tune up a correct set of parameters for each group of solar cells obtained from different solar cell or wafer manufacturers. In contrast, we can guarantee that the inspection process will work for all types of silicon grain boundaries pattern independent of origin.
High speed inspection for mass production
ESCAD Automation offers two possible cycle times with two different ELC pinpoint solutions:
a. 60s per 6x10 module with 6” Mono/Multi Crystalline Solar Cells with one eCI-005 ELC M1080 unit
b. 35s per 6x10 module with 6” Mono/Multi CrystallineSolar Cells with two eCI-005 ELC M1080 units
The high-speed ELC pinpoint inspection system of ESCAD Automation enhances productivity with non-stop operation. The inspection process, production line logic and automation as well as result reporting and module categorization are done in parallel. This speeds up the inspection throughput rate as well as reduces the speed and acceleration of machine motion in order to gain longer lifetime of mechanical components.
Options for every need
ESCAD Automation provides inspection system based on Electroluminescence Technology in three options to serve demands from both manufacturers and research engineers. The first option is the
eSYS Photovoltaic eCI-005 ELC Pinpoint R&D System
“Basic Set”, which provides only the optical system for those module manufacturers or machine producers, who might want to integrate an optical system into their existing machines. It is possible to parallelize more than one measurement unit into a single machine in order magnify the inspection time per module. This includes measurement unit as well as software and processing computers.
Secondly the “Complete Machine Solution”, provides a complete machine solution in the form of plug-and-play to those manufacturers who would like to fit the automatic inspection machine solution into their factory space (Inline Solution).
The complete machine solution is sunny- side up or sunny-side down selectable to fit customers existing solar module handling mechanism. This option includes machine basis, automation components, measurement unit, processing pc as well as software suite. Thirdly is the “Laboratory System”, which provides the
electroluminescence system in the form of laboratory set. Researcher engineers will be able to feed solar cell samples from their production both in single solar cell or stack forms in order to perform the test and statistically analyze the result on their own in the laboratory.
This helps improve current production quality by adjusting or improveing the current production processes from samples test results. ESCAD Automation is a part of ESCAD Group and evolved to one of the leading providers of engineering services for the automotive, aerospace, and industrial machinery.
ESCAD Group is one of the 100 most innovative German enterprises with more than 550 employees. The company has a network providing a global reach
The application know-how from a wide field of Industries, tools and methods combined with right business attitude enable us to address correct products and solutions to the market.
17
www.solar-pv-management.com Issue III 2010
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