Patent ID: 7053747
Filing Date: 2006-05-30
Classification: H01F,H01L

Abstract:
1. A method for fabricating a spiral inductance on a substrate, the method comprising the steps of: forming a structured inductance metallization and a structured upper ground metallization on an upper surface of the substrate; forming a first insulating layer at least between the inductance metallization and the upper ground metallization and over the inductance metallization; back-etching of an area of the substrate below the inductance metallization such that at least a portion of the windings of the inductance metallization are embedded in the insulating layer for support and are suspended over the completely back-etched area of the substrate; and structured metallization of the surface of the back-etched area of the substrate for forming an end-to-end-connected ground point, and of the segments of the inductance metallization located above the back-etched area for forming thickened windings of the spiral inductance.