Patent ID: 8686426
Filing Date: 2014-04-01
Classification: H01L

Abstract:
1. A semiconductive device comprising: a gate electrode; a gate insulating layer; a first semiconductive oxide layer comprising a first composition that includes a first semiconductive oxide; a second semiconductive oxide layer comprising a second composition that is different from the first composition and includes the first or a different second semiconductive oxide and that further includes at least one additional component that is not included in the first composition, where the first and second semiconductive oxide layers overlap with one another in a common overlapping region of both, where the gate electrode insulatively overlaps at least the common overlapping region, where the gate insulating layer is interposed between the gate electrode and the common overlapping region of the first and second semiconductive oxide layers; a source electrode connected to at least one of the first and second semiconductive oxide layers; and a drain electrode connected to the at least one of the first and second semiconductive oxide layers, the drain electrode being spaced apart from the source electrode, wherein the at least one additional component of the second composition includes at least one of gallium (Ga), silicon (Si), niobium (Nb), hafnium (Hf), and germanium (Ge), wherein the first semiconductive oxide layer is interposed between the gate insulating layer and the second semiconductive oxide layer, and a content of the additional component is in a range from about 1 at. % to about 30 at. % relative to the 100 atomic percent of the second composition.