Patent ID: 6417039
Filing Date: 2002-07-09
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device comprising a semiconductor body having a surface which is provided with a coil having a magnetic core, in which method, the surface of the semiconductor body is provided with a first metallization layer having a first pattern of conductor tracks embedded in insulating material, and a surface, which faces away from the semiconductor body, on which a single substantially planar layer of a magnetic material is deposited directly on the first metallization layer in which the magnetic core is formed by means of an etch treatment, whereafter the magnetic core and the adjacent surface of the first metallization layer are provided with a second substantially planar metallization layer having a second pattern of conductor tracks embedded in an insulating material, said second pattern of conductor tracks being connected to the first pattern of conductor tracks at both ends thereof so as to form windings of the coil, characterized in that the first metallization layer is formed on the surface of the semiconductor body in such a manner that the surface of said first metallization layer facing away from the semiconductor body is flat, and comprising the step of depositing the layer of a magnetic material to a thickness of less than 50 nm, and wherein the magnetic material is selected to be substantially electrically insulating.