Sony Chemical & Information Devices Corporation has begun full-scale mass production of solar cell conductive film for photovoltaic modules. The SP100 Series is a film-type conductive bonding material that bonds solar cell with metal ribbon which acts a conductive line for the electricity generated by the cell.
The new SP100 Series offers a low-temperature bonding at 180 degrees Celsius in comparison to conventional soldering of 200 degrees Celsius or more, resulting in significant reduction in residual stress after bonding on cells for an improved yield during module production. The SP100 Series can also be used to bond thin cells measuring approximately 150?m, which are weaker against thermal stress during soldering than standard thick solar cells.
The SP100 Series uses Anisotropic Conductive Film (ACF) technology which normally used for such applications as mounting of a driver IC on an LCD panel, providing a stable contact between the solar cell and metal ribbon through heating and pressurizing conductive particles which has been distributed evenly into the epoxy-type resin, resulting in simultaneous heat-curing of the resin and reliable conductive equivalent to that of soldering.
Furthermore, since the material is a film type, there is no dispersal of material to the light receiving area, making it ideal to be installed in narrow areas, capable of usage at widths as small as approximately 1mm, allowing it to ensure a wide light-receiving area through reduction of busbar width. The SP100 Series is free of such materials as flux and lead, with an aim of alleviating the environmental impact after disposal.
