Patent ID: 6566174
Filing Date: 2003-05-20
Classification: H01L

Abstract:
A method of making a thin-film transistor element which comprises at least the steps of:(a) successively forming a gate electrode, a gate insulating film, an amorphous silicon film and an n-doped amorphous silicon film on a transparent insulating substrate; (b) depositing a metal for use as source-drain electrodes on said n-doped amorphous silicon film and patterning the metal to form source-drain electrodes; (c) exposing the substrate having said source-drain electrodes formed thereon to a plasma containing ions or radicals of oxygen and/or nitrogen, and thereby modifying said n-doped amorphous silicon film present in the regions where said amorphous silicon film does not overlap with said source-drain electrodes into an insulating film; and (d) patterning said amorphous silicon film into a desired island-like shape.