Patent ID: 6563174
Filing Date: 2003-05-13
Classification: H01L

Abstract:
A thin film transistor comprising:a semiconductor layer made of ZnO, Mgx Zn1âˆ’x O, Cdx Zn1âˆ’x O or CdO or ZnO, Mgx Zn1âˆ’x O, Cdx Zn1âˆ’x O or CdO that have been doped with (a) an element that can be univalent or (b) Ni; and a gate insulating film, wherein the gate insulating film includes: a first insulating film made of a material other than an oxide for constituting an interface in combination with a gate electrode; and a second insulating film, sandwiched between the first insulating film and the semiconductor layer, that is made of an oxide for constituting interfaces in combination with both the first insulating film and the semiconductor layer.