| 摘要 |
The invention relates to a method of manufacturing a semiconductor device comprising a semiconductor body (1) having a coil (3) with a magnetic core (4). By means of this method, the surface is provided with a first metallization layer (5) having a first pattern of conduction tracks (6) which are embedded in an insulating material (7, 8, 9). A layer of a magnetic material is provided on the surface (10), which faces away from the semiconductor body. A magnetic core is formed in said layer by means of etching. On the magnetic core and on the adjoining surface of the first metallization layer, a second metallization layer (11) with a second pattern of embedded conduction tracks is formed in an insulating material (13, 14). The second pattern is connected to the first pattern in such a way that windings of the coil are formed. The first metallization layer is formed on the surface of the semiconductor body in such a manner that the surface of the metallization layer facing away from the semiconductor body is planar. The layer of magnetic material having a thickness below 50 nm is subsequently provided. The method in accordance with the invention enables coils to be manufactured which exhibit a relatively high self-induction when used at frequencies above 100 MHz. |
