Protrusions called ridges are formed on the surface of a crystalline semiconductor film formed by a laser crystallization method or the like. A heat absorbing layer are formed below a semiconductor film. When the semiconductor film is crystallized by laser, a temperature difference is produced between...http://www.google.fr/patents/US7635866?utm_source=gb-gplus-shareBrevet US7635866 - Semiconductor device and its manufacturing method
