Thin film recording head having enhanced electrical insulative p

Details Thin film recording head having enhanced electrical insulative p Thin film recording head having enhanced electrical insulative p

1994-12-23

1997-08-19

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Head

Core

360120, G11B 5147, G11B 5235

Patent

active

056594500

ABSTRACT:
The invention provides a thin film recording head including an upper magnetic substance, a lower magnetic substance cooperating with the upper magnetic substance to form a magnetic circuit, at least one coil layer interposed between the upper and lower magnetic substances, the coil layer being configured in a coil pattern, and an insulative layer interposed between the upper and lower magnetic substances and surrounding the coil pattern. The insulative layer is composed of a hard-cured photoresist. A peak intensity ratio of a surface portion of the insulative layer is equal to or less than 0.5 relative to a peak intensity of aromatic C.dbd.C bonding, which aromatic is a main constituent of the photoresist. The peak intensity ratio represents an amount of hydrophilic radical groups. The invention suppresses the hydrophilic property of a hard-cured photoresist layer to reduce the noise of a thin film head.

REFERENCES:
patent: 4847327 (1989-07-01), Rupp et al.

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