JPS6173208A - Magnetic head for vertical recording and reproducing - Google Patents

Abstract

PURPOSE:To eliminate the azimuth loss and miniaturize the shape of the titled magnetic head, by constituting the head in such a way that the recording medium side ends of the pair of magnetic poles are faced to each other with a narrow gap in between and the other side ends are faced to each other with a Hall element for reproduction in between, and then, a coil for recording which magnetizes the magnetic poles in the same direction is provided. CONSTITUTION:When recording signals are made to flow to a recording coil 5 at the time of recording, magnetic poles 1A and 1B are magnetized in the same direction and, if a recording medium 8 moves in the direction shown by the arrow in the figure, the recording medium 8 is recorded with a high density by means of one end 7B of the downstream side magnetic pole 1B. At the time of reproduction, magnetic fluxes corresponding to the signals recorded on the medium 8 are made to flow from the one end 7A or 7B of one side magnetic pole 1A or 1B to one end 7B or 7A of the other side magnetic pole 1B or 1A facing to the magnetic pole 1A or 1B with a Hall element 4 in between and the quantity of the magnetic fluxes is detected by the Hall element 4. Therefore, signals recorded on the recording medium 8 with a high density can be reproduced without lowering the reproducing sensitivity.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a perpendicular recording and reproducing magnetic head capable of high-density recording and reproducing.

(Prior Art) Conventionally, as a magnetic head for perpendicular recording and reproducing, one is known that includes a single magnetic pole head with a relatively thick film thickness and a ring head with a narrow gap, and performs recording and reproducing with both heads.

(Momme point to be solved by the invention) According to the above-mentioned conventional method, since the recording-only single-pole head can have a relatively thick film thickness, magnetic saturation does not occur even for recording media with high coercive force. The ring head for playback has a narrow gap width, so it can record well without any problems. ! It is possible to play back signals recorded at high speeds with high sensitivity.

However, since two heads are used to record and reproduce signals, if the geometrical arrangement of both heads is not extremely accurate, azimuth loss may occur, and this loss can be a major problem, especially when recording at high density. Become.

It is an object of the present invention to solve such problems and to reduce the size of the device.

(Means for solving the problem) Ko Himi formed thin-film magnetic poles on each of a pair of base materials, made one end of the pair of magnetic poles facing the recording medium through a narrow gap, and reproduced the other end. The first feature is that the recording coil A is fully equipped with a recording coil A that faces each other via a Hall element and magnetizes a pair of magnetic poles in the same direction.

(Example) Figure 1 is one example of the present invention II! Skip column Ii.

In the same figure, (LA) and (IB) are thin film magnetic poles made of soft magnetic metal created by sputtering or vacuum evaporation on the opposing surfaces of base materials (2^) and (2B) made of non-magnetic materials, respectively. The film thickness is selected to be a value that allows reproduction of high-density recording on the recording medium, and the magnetic poles (1A) and (1B)
The thickness of the film is selected to a value that allows high recording sensitivity to be obtained without saturation even when recording on a recording medium with a coercive force.

The recording medium (81 (hard disk, floppy disk, tape, etc.) of the pair of magnetic poles (1A) and (1B) @ -g
s (7A) and (7B) are opposed to each other through a narrow gap (31) made of a non-magnetic thin film, and the other end is connected to the Hall element 14.
) are facing each other through the ◎ base material (2 people) on which the magnetic pole A) is formed and the magnetic pole (1B)
A recording coil (5) is wound around the base material (2B) on which is formed, and a pair of magnetic poles (1 person) and (1B) are magnetized in the same direction by the recording signal flowing through the coil (5). It is supposed to be done.

When reproducing the signal recorded on the recording medium (8), the Hall element (4) moves from one end (7 people) of the magnetic pole (1 phantom or #'1 (IB) or (7B) to the magnetic pole (1B) or ( It detects the magnetic flux corresponding to the signal flowing to one end (7B) or (7 people) on the same side of one person), and the reproduction output obtained from the output line (61) is supplied to a not-so-small reproduction amplifier. It has become.

Next, its operation will be explained.

When a recording signal is applied to the recording coil (51) during recording, the magnetic poles (1 person) and (1B) are magnetized in the same direction, and if the recording medium (8) moves in the direction of the arrow in the figure, the downstream side The recording medium (81) is recorded with high density by one end (7B) of the magnetic pole (1B).

During reproduction, the magnetic flux corresponding to the signal recorded on the recording medium (81) is transmitted from one electrode (1 person) or one end (7 people) of (IB) or (7B) through the Hall element (41) to the -m (
One end (7B) or (1 person) of the other magnetic pole (1B) or (1 person) facing 7A) or (7B) through a gap (3).
7A), and the magnetic flux wave is detected by the Hall element (4).

As with the conventional ring head, it is possible to reproduce signals recorded at high density on a recording medium with almost no reduction in reproduction sensitivity.

Since this magnetic head uses a pair of magnetic poles 8I (1*) and (1B) in common for recording and reproduction, azimuth loss can be reduced, and a pair of magnetic poles (1*) and (1
B) in parallel through the gap (3) and each v
If the thickness is made uniform, azimuth loss can be further reduced.

If the parts of the base materials (2 people) and (2B) made of non-magnetic material shown in Figure 1 are respectively soft magnetic 7-element f91 as shown in Figure 2, then the parts not shown in Figure 1 are One end of the horizontal magnetic pole (1 person) and (1B) (7A) and (7B)
It is possible to concentrate more of the magnetic flux corresponding to the recording signal, and the recording characteristics can be improved.

In addition, as shown in Figure S, the trap and recording coil +51 is composed of two coils (5A) and (5B), and each coil (s
A) (5B) may be read in series so that the magnetization of the magnetic field fi(+A) (1!l) is in the same direction.

In the case shown in Fig. 4, the base materials (2A) and (2B) are each composed of a soft magnetic ferrite (9) having a yoke portion θG that serves as a return path for magnetic flux during recording, and a nonmagnetic material συ. Sensitivity can be improved.

Recording media (8) with auxiliary magnetic poles as shown in Figures 1 to 4
((2) not shown), or the fifth
As shown in the figure, a recording coil (5 mm) may be wound around the auxiliary Mi placed on the opposite side of the recording medium (8).

(Effects of the Invention) The present invention includes a pair of base materials each having a membrane-type magnetic pole,
One end of the pair of magnetic poles on the recording medium side is opposed to each other via a narrow gearing, and the other end is opposed to each other via a reproduction Hall element, and a recording coil is provided to magnetize the magnetic poles at the one end in the same direction. Similar to the conventional method, it is possible to record and reproduce data on and from a recording medium with high density and high efficiency, and it also has the advantage of being able to eliminate 70% loss, and also having a smaller size.

[Brief explanation of drawings]

1 to 5 each show a front view of an embodiment of the present invention. (January (1B)... Thin film magnetic pole (2^) (2E)... Base material (3)... Gap 14)... Hall element t51 (5A) (5E)... For recording Coil (6)
... Output line (7Al (7B) ... Magnetic pole (IA)
(iB) end (8+...recording medium (91・(9
)1...Soft magnetic ferrite concave...Yoke part
0... Auxiliary magnetic pole characteristics Applicant: 2 people other than Japan Vacuum Technology Co., Ltd. Figure 1 Figure 2 Figure 4 Figure 3 Figure 5

Claims (1)

[Claims] A thin film type magnetic pole is formed on each of a pair of base materials, one end of the pair of magnetic poles on the recording medium side is opposed to each other through a narrow gap, and the other end is opposed to each other through a Hall element for reproduction. A magnetic head for perpendicular recording and reproducing, characterized in that it is equipped with a recording coil that magnetizes in the same direction.