Pole Head for Vertical Recording
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09
A pole head for vertical recording is assembled from a head housing, a head pole piece, a prewound coil and awear pad. Head housing 10 is a ferrite material which has coil groove 11 with coil lead slot 12 and pole piece hole 13. Hole 13 can be drilled all or part way through housing 10. Groove 11, slot 12 and hole 13 can be prepared by laser or ultrasonic machining. Head pole piece 20 is prepared from a ferrite substrate having a bonded nonmagnetic wear resisting tip 21. A film of Co-Zr-Nb is sputtered onto lapped surface 22 and, optionally, a ferrite closure piece 23 is bonded to the sputtered surface. Pole piece 20 is prepared with dimensions to closely fit pole piece hole 13. Wear pad 24, approximately 0.004 inch thick, has a machined hole 25 to allow a close fit of head pole piece 20.