Browse Prior Art Database

Magnetic Head Manufacturing

IP.com Disclosure Number: IPCOM000093361D
Original Publication Date: 1967-Sep-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 64K

Publishing Venue

IBM

Related People

Norture, A: AUTHOR

Abstract

This process is for manufacturing and layer assembling of the different parts constituting magnetic head circuits. The coordinates of the basic pattern of the part are first obtained, drawing 1.

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Magnetic Head Manufacturing

This process is for manufacturing and layer assembling of the different parts constituting magnetic head circuits. The coordinates of the basic pattern of the part are first obtained, drawing 1.

This pattern is photographically reduced as in drawing 2. Then by photomultiplication there is obtained on the final negative a number of parts directly related to the unitary part size. A tore is provided for test as shown in drawing 3. This final negative, completed by two reference holes, is the basic element of the ultimate operations. Then by photo-engraving the photographic images of the basic element are transferred on a metal coated on its two faces with a photosensitive substance. A series of layer groups is thus obtained, all positioned in connection to the reference holes as in drawing 4. The thermal treatment is realized from the basic element, containing for example 200 parts, obtained by photoengraving. Each layer is mounted between two stainless steel or ceramic blocks to plane the laminations during one pass in a furnace.

The stratification is then realized by stacking the layers.

The first layer is placed on two reference studs corresponding to the reference holes and glued. The second layer is then placed and glued and so on until the wanted gratification is obtained. If the magnetic head circuits include elements made of different metals, these elements can be obtained by the same photonegatives and produced by the same proce...