Wugen Pan

Shaped silicon-crystal wafers obtained by plastic deformation and their application to silicon-crystal lenses

Kazuo Nakajima, Kozo Fujiwara, Hiroshi Okuda, 2005 .

Directional growth method to obtain high quality polycrystalline silicon from its melt

Noritaka Usami, Kazuo Nakajima, K. Fujiwara, 2006 .