Browse Prior Art Database

Magnetic Head

IP.com Disclosure Number: IPCOM000084403D
Original Publication Date: 1975-Nov-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Neter, N: AUTHOR [+3]

Abstract

This design allows construction of a high-density read/write magnetic head having small dimensions and exhibiting close track resolution.

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Magnetic Head

This design allows construction of a high-density read/write magnetic head having small dimensions and exhibiting close track resolution.

As shown in exaggerated schematic exploded top plan view, the head consists of a write section, a center section and a read closure. The basic effective tolerances and dimensions of the read and write heads are determined from the structure of the center section. For example, a common datum surface, not shown, on the center section is utilized to locate each of the magnetically permeable portions 2 which are included in each write head. Similarly, each read head 4 is located on the center section from the same datum as the write portion. Thus, the alignment and tolerances between write head portions 2 and each corresponding read head 4 is controlled.

Additionally, the use of a common datum avoids tolerance buildup from head- to-head. In practice, it is desirable for the width of each read track 4 to be narrower than the width of each write track 2. This provides additional location tolerance and guarantees full alignment of the read heads with the written tracks.

The closure portions 6 of each write head is deposited on the write section, the portions 6 having sufficient excess width to assure that they will align with magnetic proportions 2 on the center section. As between two portions 2 and 6 of the write head, the effective width and location of the write track is determined by the width of the narrower magnet...