Patent ID: 8314491

Claim:
A semiconductor device comprising: a semiconductor substrate that is provided with a semiconductor element and an electrode terminal including a first conductive layer for the semiconductor element on a surface; a first dielectric layer that is formed on a main surface on which the electrode terminal is provided of the semiconductor substrate, has a first opening and a second opening reaching the electrode terminal in an area on the electrode terminal, and is formed by modifying a photosensitive resin; a redistribution that is provided to fill in at least the first opening and includes a second conductive layer that is electrically connected to the electrode terminal; a conductive protective layer that is formed on an uppermost layer of the redistribution, and includes a third conductive layer that has an oxidation-reduction potential of which difference from the oxidation-reduction potential of the first conductive layer is smaller than a difference of the oxidation-reduction potential between the first conductive layer and the second conductive layer; a second dielectric layer that is formed on the first dielectric layer and the conductive protective layer, has a third opening reaching the conductive protective layer and a fourth opening reaching the electrode terminal via the second opening, and is formed by modifying a photosensitive resin; and a bump that fills in at least the third opening and is formed on the conductive protective layer.