Apparatus to Increase Magnetic Field During Thin Film Head Processing to Maintain Saturation and Film Anisotropy
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-30
The present apparatus increases the magnetic field and thus overcomes magnetic curling near the edges of yoke during thin film head processing in which the track density has been increased to about 2000 and the pole tips have been decreased to about 6mm. The Figure shows the apparatus of the present invention which serves as a flux concentrator. The flux concentrator 2 is placed within a permanent magnet 4. The flux concentrator 2 has a nonmagnetic nonconducting frame 6 made of a material such as lucite. Soft magnetic iron inserts 8, perpendicular to the flux field 10 created by the permanent magnets 4, are inserted in the frame 6. The thin films 12 are positioned between soft iron concentrators 14 and stainless steel deflectors 16.