Patent ID: 9076864
Filing Date: 2015-07-07
Classification: H01L

Abstract:
1. A method for fabricating a semiconductor device, comprising: forming a first conductive layer doped with a first impurity for forming a cell junction over a semiconductor substrate; forming a second conductive layer over the first conductive layer; forming a plurality of active regions, each having a first sidewall and a second sidewall, by etching the second conductive layer and the first conductive layer, wherein the plurality of the active regions are separated from one another by trenches; ion-implanting a second impurity for forming a diffusion barrier region into a portion of the first conductive layer of the active region on the side of the first sidewall; forming an one side contact connected to the first conductive layer of the active region on the side of the second sidewall; and forming a plurality of metal bit lines each connected to the one side contact and filling a portion of each trench.