JPS59127210A - Magnetic head - Google Patents

Abstract

PURPOSE:To eliminate mutual interference between coils and to simplify a manufacturing process by employing a main magnetic pole exciting type head as a recording and reproducing core and a ring type head as an erasing core, and arranging the recording and reproducing coil and erasing coil at distance. CONSTITUTION:The recording and reproducing core 21, erasing core 22, and nonmagnetic bases 23 and 24 are laminated; and the recording and reproducing core 21 uses the main magnetic pole exciting type head equipped with a thin layer 19 having high magnetic permeability and ferrite 25 and a coil is arranged at a position 32. The erasing core 22 uses the ring type head having the closed magnetic path of materials 26, 27, and 28 with high magnetic permeability and also having a gap 20, and a coil is arranged at a position 33. Thus, the recording and reproducing coil and erasing coil are at distance and the erasing core 22 has the closed magnetic path, so the leakage of magnetic flux from the cores is small and the influence upon the recording and reproducing core is ignored.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes an erase core and a
- Regarding the sliding of a magnetic head, an object of the present invention is to provide a guard band between each recording track on a flexible disk-like perpendicular magnetic recording medium. The object of the present invention is to obtain a P-head suitable for a vertical sharpening nail method in which a perpendicular magnetic r-needle is applied to C and the like.

At present, the development of vertical recording using Co-0r vertical recording and chemical film as the vertical stamp and punch recording medium is not progressing with the aim of achieving Amagawa because of its high density and pre-curved needles.

It is assumed that the vertical t', sign and sign type method is suitable for the digital riP memory button, and that the storage device of the floppy disk drive of the information system equipment (/i' cannot be considered that the tree method will be put into practical use. There is.

The best Koyasu head for the vertical Imen 8e recording system is the King's Shun-Fuda 1 Sukegoku type head shown in Figure 1.

This head has a main magnetic pole 1 made of a high magnetic permeability thin film on one side of the recording medium, and a ferrite material 2 and a coil 6 wound around it on the opposite side. However, this type of $tahenodo is a type that is separated into two parts, and it is practical from a cost standpoint. The head takes advantage of the characteristics of the strong main pole, and the second
A main 6B pole excitation type head with a structure like the one shown in the figure, in which a ferrite 7 is attached to a high magnetic permeability thin film 6 and a coil 8 is wound in its place, has been devised. It is not separated into two parts, and has high performance and practicality.

This improved version is configured for a full floppy disk drive, and an example is shown in Figure 6.
It is shown in the figure. Figure 6 is a cross section showing the arrangement of the head.
FIG. 4 shows a high-iljm heavy membrane 11, which is 1 when viewed from the tip. Ferrite 12. A recording/reproducing core extends from the coil 16 and has a high crushing rate of 14° to 15°. Extending from the coil 16 is an erase core. , FIG. 5 shows its configuration. For the construction shown in the figure (a)
, (b), (c) from the six σ) blockers.

After forming the high magnetic permeability thin film 11 or the 14 ridges on the substrate, the film is patterned to a predetermined size by a photo-etching process, and then the shape of the substrate is processed. The coil will unwind after the tip of the head is polished. The problem with the thick h in this head is that the recording/reproducing coil and the erase coil are adjacent to each other.

Since both the erase core and the erase core are made by Kaiken, they interfere with each other. stomach.

In order to solve this problem, the uninvented device adopts a 1j ring type I head structure with a menopausal Pif< structure for the erase core, and also has one button, a reproducing coil, and an erase coil 'ff-.
The coils are placed 1,000 feet apart to eliminate mutual interference between the coils.

The appearance of the magnetic core according to the present invention is shown in Fig. 6.
to recording/reproducing core 21. A cross-sectional view of the recording/reproducing core, in which the erase core 22 and the unsupported support 23.2A are removed and constructed as 1ζ, is shown in Figure 7I. High transparency S in recording/playback core
Unthin wisteria 19. This is the above-mentioned main pole excitation type head including the ferrite 25.

A coil is placed at position 62. A cross-sectional view of the erase core is shown in Figure 8, but the head shadow type is made of high transparency material 2
6, 27. A closed magnetic circuit is formed at 2'8 with a tongue cap 20
It is a ring-shaped head with a ring.The coil is installed at the 36th position.

Coil 53&'i, pre-wound h4c one apart.
.

Place it before placing the bar 26f. Whether or not to use a bank bar is decided on a case-by-case basis, and it is not always necessary to use it.

In order to show the effects of the present invention, σ) is a diagram showing the positional relationship between the recording/reproducing core and the erase core.

As is clear from Figure 9, when the recording/reproducing coil and the erase coil are separated, the erase core forms a closed magnetic path, so the Ito's chime from the core is less and the shadow on the recording/reproducing core is less. One of the obvious benefits of the present invention is that the manufacturing process is easy.At first glance, it may seem that both the recording/reproducing core and the erase core are responsible for complex work. Each core is prepared by first manufacturing a rod-shaped block with a cross-sectional view shown in Figures 7 and 8M, and then slicing it, so mass production is high, and there is no patterning process for a high magnetic permeability thin film (there is no patterning process at the time of slicing). There is also a cost advantage as the main magnetic pole is a highly permeable thin film that is highly resistant to etching forces and corrosion resistant. (I would like to emphasize that the reliability of the head is determined by the reliability of the main electrode membrane.) Since trench coils can be arranged by inserting a coil into each core, it is possible to increase the number of coil turns and increase the head output.8, productivity is also high.7 As mentioned above, In addition, a main-excitation-type head is adopted for the recording/reproducing core, and a link-type head is adopted for the erase core1.
．． The head of the invention has many advantages as a small complete head of the id vertical correction method, both in terms of characteristics and soft spots in the manufacturing process. Although the explanation has been made regarding the So type research head, the present invention is not limited to this type of head, and the main-polar excitation U-type ten uses a ring-type research head for the erase core of the head. The unexploited 8I:I is effective even in the manufacturing method of shape 9 with l:5.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a main base pole-sode support male pole type head. Figure 2 shows a schematic diagram of the main base pole excitation type head.
This is an example of a $2000 head using a evening excitation type head. Fig. 6 is a schematic cross-sectional view, Fig. 4 is a view from the tip of the head, and Fig. 5 is the configuration of the head. show. Figure 6 shows an example of the tree-climbing head. The 8th and 1st are each recording/reproducing core 9 erase core, -9
Described in Figure 1! This shows Do 1, which is a combination of S[encore and erase core. 1.6, 11.14.19...Takawako Honko Membrane 2
．． 7.12, 15.25.26.27.28...
・a Transparent a' Filling material (soft ferrite, permalloy,
Sendust, etc.) 3.8.13, 16.32.33... Coil 4
．． 9... Perpendicular magnetization film (Tarukekikenki recording medium) 5.
10...High magnetic permeability thin film (the layer of vertical 8-shaped ribs) 17, 18.26.24.29.50.31=. ...Non-sensitive support 20...Gap 22...Erase core or above Applicant: Nebokikosha Co., Ltd.,'Ryo10',,'i2!・・１：、'i 4 J (a) 8th ■ 9th

Claims (1)

[Claims] A high magnetic permeability thin film, a 1ζ high magnetic permeability material 1. Said high play? A gap is provided between the recording-reproducing core, the high permeability material 2, and the high permeability straw material 3, which is removed from the coil wound around one portion of the high permeability material 1. M is composed of a plurality of erase cores for trimming recorded patterns, which are wound from a coil wrapped around either the front high permeability material 2 or 3.
t-head,