Patent ID: 7227736

Claim:
A capacitor device, comprising: a substrate; a capacitor constituted by a lower electrode formed on or above the substrate, a patterned dielectric film formed on the lower electrode, and an upper electrode formed on the dielectric film; an insulating film covering the capacitor; a first contact hole formed in the insulating film on a connection portion of the upper electrode; an electrode pad for preventing a diffusion of solder, said electrode pad having a plug form such that it fills the first contact hole and protrudes from the insulting film; and a solder bump electrically connected to the electrode pad, wherein the upper electrode includes a protrusion portion protruding in a direction in which the dielectric film does not exist from a pattern-edge of the dielectric film, and the upper electrode is connected to the first contact hole on the protrusion portion, and wherein the insulating film directly contacts a side surface of a pattern-edge of the dielectric film at a location away from the direction in which the upper electrode protrudes.