Patent ID: 9219106
Filing Date: 2015-12-22
Classification: H01L

Abstract:
1. A semiconductor device comprising: a conductive line over a semiconductor substrate, the conductive line being a spiral; a magnetic material in a central region of the spiral; a first underbump metallization over the semiconductor substrate, wherein the magnetic material and the first underbump metallization have the same first composition of materials and wherein a top surface of the first underbump metallization is at least partially planar with a top surface of the magnetic material; a first seed layer between the magnetic material and the conductive line, wherein the first seed layer has a first side perpendicular with the semiconductor substrate, a second side perpendicular with the semiconductor substrate, and a third side extending from the first side to the second side, wherein the third side faces the semiconductor substrate and is in physical contact with only dielectric material; a second seed layer between the first underbump metallization and the substrate, wherein the second seed layer and the first seed layer have the same second composition of materials; and an external bump in physical connection with the top surface of the first underbump metallization.