Patent ID: 8441054
Filing Date: 2013-05-14
Classification: H01L,H02M

Abstract:
1. A capacitor comprising: a semiconductor substrate of a first conduction type; a first region of a second conduction type formed in the semiconductor substrate, the first region surrounded by isolation regions and isolated at each of said isolation regions; no less than three second regions of the second conduction type formed in the first region with a higher impurity density than the first region, any of the second regions having an elongate rectangular shape; an insulator layer formed on the first region; a first electrode arranged to commonly connect all of said second regions; second electrodes interconnected and formed on the insulator layer, any of the second electrodes having a rectangular shape elongating in parallel with the second regions and located among adjacently positioned ones of said second regions; and an extra region of the second conduction type that connects the second regions at one end.