Patent ID: 8860030

Claim:
A thin film transistor comprising: conductive particles; a semiconductor film containing germanium at a concentration greater than or equal to 5 at. % and less than or equal to 100 at. % which is provided over a gate electrode with a first insulating film interposed therebetween and which is provided in an inner region of the gate electrode so as not to overlap with an end portion of the gate electrode; an amorphous semiconductor film formed over the semiconductor film containing germanium at a concentration greater than or equal to 5 at. % and less than or equal to 100 at. %; a pair of impurity semiconductor films to which an impurity element imparting one conductivity type is added, which form source and drain regions, over the amorphous semiconductor film; a second insulating film covering a side surface of the semiconductor film containing germanium at a concentration greater than or equal to 5 at. % and less than or equal to 100 at. %, a side surface of the amorphous semiconductor film, and at least one side surface and part of a top surface of the pair of impurity semiconductor films; and a pair of wirings which are formed over the second insulating film and which are in contact with the pair of impurity semiconductor films, wherein the conductive particles are between the first insulating film and the semiconductor film containing germanium at a concentration greater than or equal to 5 at. % and less than or equal to 100 at. %.