Patent ID: 8697574
Filing Date: 2014-04-15
Classification: H01L

Abstract:
1. A method for forming a semiconductor device, the method comprising: forming a first through substrate opening within a semiconductor substrate, the first through substrate opening extending from a bottom surface of the semiconductor substrate to an opposite top surface of the semiconductor substrate, wherein, in a plane parallel to the bottom surface, the first through substrate opening includes a ring shaped through substrate trench opening extending around a central region, wherein the ring shaped through substrate trench opening extends from the bottom surface of the semiconductor substrate to the top surface of the semiconductor substrate; lining sidewalls of the first through substrate opening with an insulating material; and forming a coil for an inductor by filling the first through substrate opening at least partially with a conductive material, wherein the inductor comprises the central region surrounded by the coil and the first through substrate opening filled with the conductive material.