Browse Prior Art Database

Magnetic Head Fabrication

IP.com Disclosure Number: IPCOM000085596D
Original Publication Date: 1976-May-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Smathers, EW: AUTHOR

Abstract

This procedure provides a technique for the manufacture of a magnetic transducing head utilizing combined ferrite and thin-film technology.

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Magnetic Head Fabrication

This procedure provides a technique for the manufacture of a magnetic transducing head utilizing combined ferrite and thin-film technology.

As shown at Fig. 1 a block of magnetic material 1, such as ferrite, is provided including finished surfaces and dimensions substantially corresponding to the desired final dimensions of the head under fabrication. Then, as further shown in Fig. 1, a thin magnetic film 2 is deposited on one surface of the block 1. The thickness of the deposited film 2 is carefully controlled and is selected to match the desired throat height of the magnetic head under fabrication. This film is deposited, for example, by vacuum or sputtering techniques to very accurately controlled height dimensions.

Then, as shown in Fig. 2, a gap line 3 is etched or scribed completely through film 2, and if desired on into magnetic block 1. The structure can then be sliced along a plurality of lines 4 to provide any desired track width. Then, as shown in Fig. 3, each sliced segment is provided with a winding window 5 and appropriate electrical windings 6 so that it may be used as a magnetic transducer.

Magnetic film 2 is selected of material which is magnetically more permeable than ferrite. In this manner, the more permeable film 2 serves to concentrate substantially all of the magnetic flux or signal in the film portion and provide the effective throat height of the head. Other considerations in selecting the magnetic film include...