Patent ID: 7842610

Claim:
A method of manufacturing a through-electrode, comprising the steps of: forming a plurality of first trenches for a plurality of inner through-electrodes at a first surface of a semiconductor substrate; forming a second trench for a first outer peripheral through-electrode at the first surface of a semiconductor substrate, wherein the second trench extends continuously and completely surrounds the plurality of first trenches in plan view of the first surface of the semiconductor substrate; depositing a first insulating layer over the first surface so that an inner through-electrode insulating layer and an outer peripheral through-electrode insulating layer are formed on the first surface and inside the plurality of first trenches and the second trench; forming a conducting layer over the first surface so that the plurality of first trenches and the second trench are filled with the conducting layer and the conducting layer is formed on the inner through-electrode insulating layer and the outer peripheral through-electrode insulating layer; and flattening the first surface to form the plurality of inner through-electrodes and the first outer peripheral through-electrode which are formed of the conducting layer.