JPS61160811A - Magnetic head for floppy disk - Google Patents

Abstract

PURPOSE:To secure the satisfactory magnetization of media by attaching a material of high saturated magnetic flux density to the butting face of a read/ write head gap part. CONSTITUTION:A read/write gap is formed by the ferrite 1 held by a protection plate 3 made of TiC. A CoZr amorphous alloy is sputtered at the read/write part in its depth direction with about 5mum thickness. Thus a sputtered film 2 of amorphous is formed, and a material of large Bs is used at the gap part only. This amorphous alloy has the characteristics of mu=2,000(1MHz) or so with the Bs set at about 110,000.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a head for a floppy disk drive having a carriage and a gimbal.@ [Prior Art] The density of 70 tsupi disk drives has been increasing year by year. It has been done. For this purpose, the media was improved, and from the 7-Fe, 03 coated film with Ha of about 3ooo'''e, to
γ1' e 203 of CO deposition with 600-7000e
It has changed to It is also expected that from now on there will be a shift to high Ha types of about 9000s and metal disks of 15000e. Therefore, the magnetic saturation characteristics of the head during recording become a problem.In other words, the head cannot generate a sufficient magnetic field during recording, so the media cannot be sufficiently magnetized.

That's what happens.

[Problem that the invention seeks to solve]

In particular, if we examine this kind of magnetic saturation in detail, we can see that the saturation in the narrow part of the core near the gap is a problem. This is because it has to flow near a narrow gap, which results in early saturation.

Therefore, the head saturation characteristics are determined by the characteristics near the gap. In other words, if the area near the head is not saturated, a very large magnetic field can be created without deteriorating the head.

[Means to solve the problem]

The present invention aims to prevent saturation near the gap by attaching a substance with a high saturation magnetic flux density near the gap by sputtering.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Is Figure 1 the invention? FIG. 3 is a diagram of the DD head viewed from the sliding surface. Generally known FDD head (bulk type)
It has almost the same structure. In other words, the 7 elite cores sandwiched between the TiC protection plates form a read/write gap. 1 is ferrite and 3 is made of Tie. However, there is one difference: 0oZr amorphous is sputtered to a thickness of about 5μ in the direction of the gap depth in the read/write gap. This 0o
Zr-based amorphous alloy has BS=about 11000, A=
It has very good characteristics at around 2000 (IMHz).

FIG. 2 is an enlarged view of the head gap part. 01 is a ferrite, 2 is a CoZr-based amorphous alloy, and 3 is a gap forming material S10. It is a sputtered film. In this way, a material with a high Bg content is used only in the gap portion.

FIG. 3 shows a side view of the core. 01 is a 0oZr amorphous sputtered film, 2 is a ferrite type bar, 3 is a ferrite T type bar, and 4 is a 7z light T type bar. 4-7) Sputter an amorphous alloy onto the T-shaped bar.

Another example will be shown. FsAIS sputtering material
It is also possible to use an i-based sendust material. It is also effective to use both a single bar and a T-shaped bar for sputtering, and to use a sputtered alloy film on all the gap contacting surfaces. In addition, it is effective to use a sputtered alloy film not only for the read/write gap [1] but also for the erase gap part to improve the erase characteristics. [Effect of the invention] It is also effective for high Ha media. Since a strong magnetic field can be generated, the media can be sufficiently magnetized.

[Brief explanation of drawings]

Figure 1 is a view of the head of the present invention viewed from the sliding surface. FIG. 2 is an enlarged view of the gap portion. FIG. 3 is a side view of the core. 1...Head Core 7 Elite 2.--sputtered film 3...TiO protection plate that's all

Claims (1)

[Claims] A magnetic head for a floppy disk, which is used in a floppy disk device attached to a gimbal or a carriage, characterized in that a material with high saturation magnetic flux density (high Bs material) is attached to a mating surface of a read/write head cap part.