Patent ID: 7985996

Claim:
A semiconductor device having a first capacitance formation region and a second capacitance formation region in a semiconductor substrate, the semiconductor device comprising: a first capacitive element including: (a1) a first lower electrode having a first semiconductor region formed in the semiconductor substrate; (a2) a first capacitor insulating film formed over the first semiconductor region; and (a3) a first upper electrode having a first conductive film formed over the first capacitor insulating film; and a second capacitive element including: (b1) a second lower electrode having the first conductive film; (b2) a second capacitor insulating film formed over the first conductive film; and (b3) a second upper electrode having a second conductive film formed over the second capacitor insulating film, formed in the first capacitance formation region, and a third capacitive element including: (c1) a third lower electrode having a second semiconductor region formed in the semiconductor substrate; (c2) a third capacitor insulating film formed over the second semiconductor region; and (c3) a third upper electrode having a first conductive film formed over the first capacitor insulating film, and a fourth capacitive element including: (d1) a fourth lower electrode having the first conductive film; (d2) a fourth capacitor insulating film formed over the first conductive film; and (d3) a fourth upper electrode having a second conductive film formed over the second capacitor insulating film, formed in the second capacitance formation region, wherein the first capacitive element and the third capacitive element are coupled in series to form a series capacitive element; wherein the series capacitive element and the second capacitive element are coupled in parallel; and wherein the series capacitive element and the fourth capacitive element are also coupled in parallel.