US Patent 7405439 Memory cell structure and semiconductor memory device

A memory cell structure comprises a first memory capacitor that is arranged in a first local area, and includes a first lower electrode, a first upper electrode, and a first dielectric oxide film interposed between the first lower electrode and the first upper electrode; a second memory capacitor that is spaced apart from the first memory capacitor and arranged in the first local area, and includes a second lower electrode, a second upper electrode, and a second dielectric oxide film interposed between the second lower electrode and the second upper electrode; and a first local interconnection layer.