INDUCTORS AND METHODS OF MANUFACTURE THEREOF

摘要

An inductor core (6) is described along with methods for its manufacture. The core comprises a body (20) formed of electrically insulating magnetic material,and a stack (22) of layers over the body, formed alternately of electrically conductive magnetic material (24) and insulating material(26), wherein the magnetic saturation level of the magnetic material of the body is lower than that of the magnetic layer material.Thus, two magnetic paths are provided in parallel, one through the stack of layers and one through the body material. This results in a higher inductance at low currents and maintenance of a lower inductance at higher currents. The core (6) is particularly suitable for use in inductors integrated inside a device package for example in an integrated DC/DC converter.