Vertical magnetic head and manufacturing process

摘要

The head includes a magnetic circuit on the face of the substrate. The magnetic circuit has an airgap formed from a slot filled with an non-magnetic spacer and a winding to carry the signals. A thin layer of a first magnetic material (86) is deposited in the airgap by a vapour phase and covers the spacer (84). A thick layer of a second magnetic material (92) encloses the first magnetic layer. The second layer has inferior mechanical properties to the first and an electrically insulating, non-magnetic layer (87) separates the first and second magnetic layers.