Thin film magnetic head having multilayer winding structure

Details Thin film magnetic head having multilayer winding structure Thin film magnetic head having multilayer winding structure

1989-10-31

1992-06-23

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Head

Core

360123, 360110, 360122, G11B 5147

Patent

active

051248700

ABSTRACT:
In a thin film magnetic head having a multilayer structure, a plurality of coil conductive layers are piled up to be formed between a lower magnetic layer and an upper magnetic layer. Each coil conductive layer is formed by one spiral-wound coil. The number of turns of the coil of the upper-side coil conductive layer is set smaller than that of the coil of the lower-side coil conductive layer. These coils are connected together such that first and second portions of the connected coils are respectively connected to a center terminal which is provided at the middle position of the connected coils. Thus, the number of turns of the first portion of the connected coils is set identical to that of the second portion of the connected coils. In addition, the winding direction of the first portion is set reverse to that of the second portion. Such coil conductive layers are surrounded by and buried in an insulation layer formed between the lower magnetic layer and upper magnetic layer. Due to the above-mentioned structure, the coil of each coil conductive layer can be easily formed within the insulation layer. Further, the reproduction output and the efficiency of the magnetic circuit can be improved.

REFERENCES:
patent: 3148347 (1964-09-01), Morrison
patent: 3505569 (1970-04-01), Schweizerhof
patent: 3549825 (1970-12-01), Trimble
patent: 3798059 (1974-03-01), Astle et al.
patent: 3848210 (1974-11-01), Felkner
patent: 3855561 (1974-12-01), Gottschalt
patent: 4694368 (1987-09-01), Bischoff et al.
patent: 4841402 (1989-06-01), Imanaka et al.

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