JPS59127216A - Magnetic head - Google Patents

Abstract

PURPOSE:To simplify the constitution of a magnetic head and to decrease working manhours by setting magnetic cores with high magetic permeability at intervals from a medium on both outsides of a gap part in a gap width direction so that they are nearly parallel to medium opposing end surfaces of the gap part, and specifying the height between separate surfaces and the end surfaces between 1 and 20 microns. CONSTITUTION:A nonmagnetic part 202 is embedded in a core 201 near the gap part of a center member. There is the gap part 302 between magnetic cores 301. Then, nonmanetic parts 202 are formed at the circumferential parts of the gap part 302 on the side where the magnetic cores 301 faces a medium. Data is recorded on the medium in an area E of the gap part and data on the medium is erased in areas F and G. When H is >=1 micron in a figure, a data pattern is left recorded easily in erasing areas and this possibility further increases when the abrasion a head material is considered. Consequently, the value of H is designed preferably to about 5-10 microns. It is difficult to use practically unless the value of H is at least 1-20 microns.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head for a magnetic storage device, and sometimes relates to the structure of an M1 head that simultaneously performs recording on both sides of a recording data track.

In the cooperative storage device, the relative position t between the magnetic medium for storage and the magnetic A head for recording or reproducing 1=r2
f relationship, dgfVc The positional relationship in the width direction of the recording data track is one of the major issues in device design because it has a large effect on the quality of the signal, such as the output level of the reproduced signal and the signal-to-noise ratio. In particular, when the sensitive medium is removed from the storage device itself for use or maintenance, or when one medium is used for 1 meter between multiple storage devices with uniform specifications, Mutual control of data track positions becomes extremely easy. Specifically, the correlation between the track position of the data recorded on the medium by the storage device used for recording and the track position of the reproduced data on the medium of the storage device used for reproduction is electrical. Ideally, it is desirable that both track positions be one mile apart, or that the reproduction track position be included in the recording track position.

For example, in magnetic tape drive devices, floppy disk drive devices, rigid disk drive devices, etc., the operating temperature and frequency of the device vary widely, and the medium is in the form of a cassette or cartridge. There are times when I often work as a chivalrous man.

In this case, the track position of the data recorded on the medium and the recorded data? Depending on the environment, the position of the writer's track during playback may vary depending on the device.

, In order to obtain a large recording capacity, magnetic storage devices usually use
Design to minimize this misalignment as much as possible! 1
Obtain many lbC recording tracks. Reduce this gap at the foot of the foot,
In addition, as a way to eliminate the disadvantages of front G output deterioration of 100 degrees and reduction of the signal-to-line sound ratio caused by n, it is generally done to improve the groove depth of the 63° C. head.

Figure 1 shows an example of the structure of a magnetic head commonly used in 70's disks, etc. I would like to congratulate you on the head structure shown in Figure 1 below. , A is the head core part,
The shape of the surface facing the medium is of course shown. The core component is IQ
l, 102. It consists of three swords (No. 103), each with its sensitive core section shown diagonally. , IQ4 represents the write or write/read head gap, on both sides of the 105U recording data trunk, above the erase head gear. Gap 105&'X, Gap iQA and have been cutting it for a while. Member 1 [41,102,1
The parts other than the magnetic core part 5 are made of insensitive strong door members. FIG. 1B is a diagram showing all the members constituting the completed head so that their relative positions can be seen. , 1o
6 is the IL of the first evil A] 1,102.10! The head center part system consisting of 1 sword ≧ t-107, 108 is a slider part that reinforces the center member 106, 109 is Agagome and reading The coil 119 is an eraser coil 111 which is a sensitive back core member. Then, insert the center member into the hole indicated by the arrow or paste and assemble -C.

In the first step A, the head moves in the direction of the arrow relative to the medium, and the write head gap section 1 [IA records the data, and the recorded data is removed from both sides of the head gap. Erase by IO5. gd recorded by the erase head and by the write head gap 104 fL
At the same time, the old data that may remain on both sides of the recorded data track is erased in a neat manner. The reason why the gap ios is tilted with respect to the gap IQ, i is that in the case of bamboo, each playback signal detected by the erase core due to the gap 105 jumps to the rad core for both recording and playback, which causes deterioration of the signal. This is to recommend.

As is clear from the diagram, the structure is extremely sloppy.
There are also many parts dealers. Also, as is clear from the symmetry of the head, the dimensions and tolerances IF of each part are required, i.e. the width of the recording casso 104, the width of the erasing gap 1050, the members of 1o1°102, '103. The length of the blade, the flatness of the flat surface, etc., are obvious to bamboo experts regarding this four-piece sword V-shape. The reason for this is that the number of recording tracks has increased in recent years, as the manufacturing process for the head shown in Figure 1 or Figure 1 is quite large, and the cost is also extremely large. has become a necessity, and in order to increase the number of tracks per unit length, the thickness of the member? We had to finish it into thin pieces of about tens of microns. Temporarily take 4'&I%'AIk
S9, step? IIv also fell in love - no sokosuto has one stomach.

The present invention has been made in view of the drawbacks of the magnetic head due to the previous structure, and is:
The aim is to simplify the process, reduce processing man-hours, increase yield, and facilitate high-cutting rate processing similar to the increase in track productivity, thereby significantly reducing costs. .

Below, regarding non-invention, I will write about the non-invention.

FIG. 2 is a one-person embodiment showing the structure of the head mount according to the present invention. The central member 201 records or records]kp+
It is a raw core member, and on both sides of it, there is a gap 105 for erasing as shown in FIG.
f, L & I. Therefore, it is interesting to note that the number of components that make up the head has been reduced to just one. Instead, a non-magnetic part 202 is provided near the gear part of the central member.
It is embedded and formed in 1. FIG. 3 is an enlarged view of the vicinity of the gap. Gap part 3 between 6-degree core 501
There is 02. Then, on the side of the surface where the magnetic core 301 faces the medium, a non-magnetic part 202 is provided around the gear part 3020.
is formed. Data is recorded on the medium in the area E of the circle in the gap, and the data on the medium in the scarlet area F and the area () has a width i'L.

That is, the 45th figure E corresponds to the hair 1 figure 104, and the 6th figure E corresponds to the 1st figure 1.
[, a, Hori 6, F, G, Rin 1 (corresponds to 105).

Is the sincerity H of the non-sensitive part 202 correlated with the data recording density? I can't decide without taking it. Due to the unique magnetic system, the gap between the end of the head and the medium is submicron, and the magnetization reversal interval of recorded data is between submicron and micron. The recorded data on the medium can be fully erased, and -! Due to the structure of the head in which the recording core and the erasing core are shared, it is necessary to have a number in which data is not inserted into the 7th part and the G part. FIG. 44 shows the distribution 7 of the recording magnetic field in the plane of the medium on the same plane as the medium of the magnetic core that forms the gap, centering on the gear gap 302. 4Q1 is the distribution in area E, a 02. is area F
(This is the distribution that dies in U.Distributive fLMa131 and A
The shape of 02 is important because the magnetic core blood and the medium surface are both in contact with each other. Figure 5 consists of the media! #Change in the magnetic field at the position where the head stops recording?
501 is the recording magnetic field in area E, 502 is area j
The erase magnetic field is below or GVr-. In 501, magnetization recording is performed by a recording magnetic field that is generated momentarily.
At 02, erasing is performed by a gradually decreasing magnetic field. The breaks in the diagram; l11jlHo, -Ha represent the sardine noboru kuni・) direct necessary for the medium ke record or 7.

Figure 3 mark B indicates that the maximum of 1st shift of Figure 4 Gokuken 402 is the 5th shift.
If the slope of 402 is large and the slope of 402 is a sword), it will be selected as a break. At 20 microns or more, the coil current necessary to obtain a sufficient erasing magnetic field becomes thicker, and the amplitude of the recorded data is absorbed, the erasing width on the medium expands, and the erasing field becomes unreliable. Become clear. 3rd evil E
When the diameter is less than 1 micron, there is no possibility that any data turns will remain recorded in the extinction zone, and if you take into account the four pillars of the head material, the magnetism will become even stronger. For reasons such as this, H's first shift is 5.
It is desirable to design it to ~10 microns/). It is difficult to use it unless it is 1 to 20 microns dark at night. Fig. 6 shows yet another embodiment in which the non-grinding portions 601 and 6022 are formed to extend over the entire core area.

The effect of the non-sensitive part is fi9 mentioned above, and various other forms of the non-sensitive part PK can be thought of in history.

Contrary to FIG. 3, it also belongs to the present invention that the area around the gear lug in the non-grinding end is made of a sonomagnetic material. Example 2 is shown in FIG.

As described above, by using the head of the present invention having a tray, the number of parts that make up the head can be greatly reduced, and the number of processing and assembly steps can be reduced, thereby making it possible to reduce costs. Also, high track th! ! It is possible to counter and avoid the thinning of parts and the increase in processing precision that accompany the diversification. Furthermore, a dedicated erasing coil and its driving circuit become unnecessary on the circuit. On the medium, the recording gap position and the erasing gap position are located at the same position on the track, eliminating the need for a phase delay circuit, which is indispensable in conventional systems. According to the present invention, a head-containing, anti-phase, and still track title murmuring ml memory device having many features is realized.

[Brief explanation of drawings]

FIG. 1 shows the structure of a conventional magnetic head of the type that erases inside the recording head, and FIGS. 2 and 3 show the structure of the conventional magnetic head. Figures 6 and 7 show examples of the magnetic head according to the present invention. Figures 4 and 5 show the distribution of recording (intervention) and erasing magnetic fields (B) produced by the head that is not invented. Shown is the iQA...d self-recording bellybutton file section 105...
Erasing head cap group 109.203...Recording coil 110...Erasing coil 111...Back core 202, 601...Non-Imi 1 Ikunoso 7Di
...-Sumibe and above Applicant Co., Ltd. Mayuzya Tan U Kozueko Itl 5, 31 Figure 2 Figure 1, s Figure 3 jr; Figure 4:,: Figure '-6 Figure 7:

Claims (1)

[Claims] On the side of the end that intersects or contacts the medium, the high permeability magnetic cores on both outsides of the gap part of the gap (@Garo) are arranged so that they are approximately parallel to the same end face of the gap part facing the medium. A magnetic head characterized in that the magnetic head is separated from the medium blade λ, and the height of the separated surface and the end surface is 1 to 20 microns.