Patent ID: 7639541

Claim:
A semiconductor device comprising: a semiconductor substrate; a circuit forming area and a memory area disposed in the semiconductor substrate; a plurality of memory cells formed in the memory area; a first well and a second well formed in the memory area; a first conductor film formed over the first well and the second well and extending in a first direction; a second conductor film formed over the first well; first semiconductor regions formed in the first region; and a second semiconductor region formed in the second region; wherein each of the memory cells includes a capacitance element, an element for reading data and a selection field effect transistor of the element for reading data, wherein the capacitance element includes the first conductor film and the second semiconductor region, wherein the element for reading data includes the first conductor film and the first semiconductor regions, wherein the selection field effect transistor of the element for reading data includes the second conductor film and the first regions, wherein, in a second direction perpendicular to the first direction, a length of the first conductor film of the capacitance element is larger than a length of the first conductor film of the element for reading data, wherein a word line of the memory cell is electrically connected to the second semiconductor region of the capacitance element, and wherein, during a reading data operation, a first bit line of the memory cell is electrically connected to the first semiconductor region of the element for reading data via to the selection field effect transistor.