Polycrystalline semiconductive film, semiconductor device using the same and method of manufacturing the same

摘要

A semiconductive film is formed on a substrate having a surface with indentations defining a plurality of plane regions and elevated step difference portions between adjacent plane regions. The semiconductive film is irradiated with energy beams to be polycrystallized, whereby the positions of the crystal grain boundaries in the polycrystalline semiconductive film are controlled.