Semiconductor memory device having a decoupling capacitor

摘要

A semiconductor memory device comprises a cell capacitor having a first buried contact connected with a semiconductor substrate of a cell region and a first storage node connected with the first buried contact, and a decoupling capacitor for reducing a coupling noise, having a plurality of second buried contacts formed on a semiconductor substrate portion adjacent in the cell region and extended in parallel with each other and a plurality of second storage nodes connected with the second buried contacts.