Polycrystalline silicon film containing Ni

摘要

The present invention is related to a polycrystalline silicon film containing Ni which is formed by crystallizing an amorphous silicon layer containing nickel. The present invention includes a polycrystalline silicon film wherein the polycrystalline film contains Ni atoms of which density ranges from 2x10¹⁷ to 5x10¹⁹ atoms/cm³ in average and comprises a plurality of needle-shaped silicon crystallites. In another aspect, the present invention includes a polycrystalline silicon film wherein the polycrystalline film contains Ni atoms of which density ranges from 2x10¹⁷ to 5x10¹⁹ atoms/cm³, comprises a plurality of needle-shaped silicon crystallites and is formed on an insulating substrate. Such a polysilicon film according to the present invention avoids metal contamination usually generated in a conventional method of metal induced crystallization.