Patent ID: 6747313
Filing Date: 2004-06-08
Classification: H01L

Abstract:
A thin film transistor, comprising:a stepped substrate provided with a sidewall between upper and lower portions thereof; an active layer formed on the stepped substrate; a gate insulation film formed on a lower portion of the active layer and a sidewall portion of the active layer contiguous the lower portion of the stepped substrate and the sidewall of the stepped substrate, respectively; an insulating film formed on a lower portion of the gate insulation film and a sidewall portion of the gate insulation film contiguous the lower portion of the active layer and the sidewall portion of the active layer, respectively; a gate electrode formed on the gate insulation film corresponding to an upper part of each of the sidewalls of the substrate and the gate insulation film; impurity regions in the active layer corresponding to the upper and lower portions of the substrate; and an offset region formed on a lower sidewall portion of the active layer and the lower portion of the active layer below a bottom of the insulating film.