| Eco-conscious Manufacturing Methods |
As a large-scale manufacturer with a keen awareness of our responsibility to the environment, Mitsubishi Electric is committed to the development of cleaner, more efficient manufacturing methods, and actively takes a leadship role. For example, in January 2003 we became the first among Japanese crystalline silicon photovoltaic cell manufacturers to begin volume production of solderless cells and modules with lead-free solder.
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| First in Japan: Lead-free solder module and more |
Traditionally, lead solder coating has been required to ensure that
PV modules remain moisture resistant and weatherproof for years on
end. By developing environmentally friendly composite materials and
manufacturing processes for silver electrodes used on the surface
of crystalline silicon photovoltaic cells, Mitsubishi Electric has
succeeded in producing Japan’s first cells that do not require
a solder coating. We also now use lead-free solder for the solder
and solder plating members used in the cell modularization process.
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| Lead-free solder photovoltaic module, solderless cell configuration |
 
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| Five percent energy reduction during manufacturing |
We have simplified our manufacturing methods in ways that create a better product
while increasing productivity. Reliable, lead-free fabrication techniques that
do not use solder coating improve the power efficiency of each individual cell.
They also reduce work steps to provide for greater manufacturing yield. Overall,
this realizes a five percent reduction in energy use during the manufacturing
process.
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