Patent ID: 8916447
Filing Date: 2014-12-23
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor device, the method comprising: forming a plurality of first conductive line layers on a semiconductor substrate, the plurality of first conductive line layers extending in a first direction and spaced apart from each other in a second direction perpendicular to the first direction, the semiconductor substrate having an active region extending in a third direction, the third direction being oblique with respect to the first direction; forming a first mask layer on the plurality of first conductive line layers, the first mask layer having line patterns extending in the second direction; forming a second mask layer on the first mask layer, the second mask layer having an open area for a first contact; forming a trench comprising a line area corresponding to the line patterns and a contact area corresponding to the open area in the second mask layer by etching the plurality of first conductive line layers using the first mask layer and the second mask layer; forming a gap filling layer filling the line area of the trench and forming spacers on sidewalls of the contact area of the trench; and forming a second conductive line layer on the gap filling layer, the second conductive line layer extending in the second direction and electrically connected to the active region.