Patent ID: 6921960

Claim:
A semiconductor device comprising: a semiconductor substrate; a main circuit region provided on the semiconductor substrate; a structure in which a first electrode layer, an inter-electrode insulating film and a second electrode layer are sequentially laminated, the structure being formed in the main circuit region; a peripheral circuit region provided around the main circuit region on the semiconductor substrate, the peripheral circuit region having a capacitor element provided; a lower electrode of the capacitor element formed of the same layer as the first electrode layer formed in the peripheral circuit region; a charge storage layer of the capacitor element formed on the lower electrode, the charge storage layer being formed of the same layer as the inter-electrode insulating film; an opening portion formed in the charge storage layer and spaced form each of the storage layer,the opening portion having a bottom to which the lower electrode is exposed; a first region formed on the charge storage layer and formed of the same layer as the second electrode layer, the first region being electrically connected to the lower electrode via the opening portion; and an upper electrode of the capacitor element formed on the charge storage layer and formed of the same layer as the first region, the upper electrode being electrically isolated from the first region; element isolation regions buried in the semiconductor substrate; an interlayer insulating layer covering the first region and the upper electrode; a first contact hole formed in the interlayer insulating layer, the first contact hole having a contact portion on the first region; and a second contact hole formed in the interlayer insulating layer, the second contact hole having a contact portion on the upper electrode, wherein the first region and the upper electrode at least partially overlap the element isolation regions, respectively, and both the first contact hole and the second contact hole are formed above the element isolation regions but not above the lower electrode.