Mar 21, 2008 19:11
Motonobu Kawai, Nikkei Microdevices
Mitsubishi aims to increase its annual output to 500MW in fiscal 2012. Mass-production of cells based on the honeycomb texture technology, which was a key to make the world record, is scheduled to start in fiscal 2010 or later.
When the cell conversion efficiency improves from 16 to 18%, the output is increased by 0.4W per 150mm square cell. With the use of a module composed of an array of 50 cells, the module conversion efficiency will increase by 20W.
To form a honeycomb textured structure, 100 million holes must be made by laser beams on a SiN film formed on the surface of a 150mm square cell. One of the issues for mass-production is to improve the throughput of laser processing equipment, which will be developed in-house. The improvement in throughput will lead to a reduction in the production cost per output.