JPS63124205A - Magnetic head - Google Patents

Abstract

PURPOSE:To easily and accurately control the depth of a magnetic head by forming a depth regulating groove on the joining face side of a magnetic core with a non-magnetic base, filling the groove with bond, executing depth working, and when the depth reaches a prescribed depth value, exposing the groove to the medium sliding face side of the core. CONSTITUTION:The depth regulating groove 21 is formed on the 1st magnetic plate 20 on its joining side with the non-magnetic base 22 and joined with the base 22 with a glass material or the like. A groove 23 for a coil is formed on the magnetic plate 20 to form the 2nd magnetic plate 20', the coil is wound around a projection part 25, the 2nd magnetic plate 20' is joined with the 1st magnetic plate having no groove 23, and the groove 21 is filled with bond such as the glass material. Then, a front projection part forming grooves, a rear wide part and a shielding material filling cut or the like are formed on the combined body. In case of executing the depth working of the magnetic head, the prescribed depth value is automatically obtained at the time of exposing the front end of groove 21 to the surface of the medium sliding face and the final two-channel in-line type magnetic head unit can be obtained by slicing the worked magnetic head.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Field of Industrial Application The present invention relates to a magnetic head used in electronic still cameras, '/TRs, etc., and a method for manufacturing the same.

(b) Prior art Convention 1 For example, regarding the structure and manufacturing method of a two-channel in-line magnetic head for electronic still cameras, Japanese Patent Application Laid-Open No. 110-11-8 (G11E5/28)
has already been proposed. That is.

The structure of this conventional head will be explained with reference to FIGS. 13 and 14. 1 gap (G1) is formed, and the magnetic core +11 is provided with a groove (5) for winding the coil, and a protrusion at the rear part (6+-2 coils is wound around the head chip for one channel). Similarly, the magnetic cores (21 and (4) form a second gap (G2),
History C bimagnetic core (20D is the groove for winding the coil (
7) is provided, and a protruding portion (8)c at the rear portion is wound around the coil to constitute a head chip (H2) for one more channel. And (9) is the magnetic core (l12
+ is a non-magnetic substrate to which clol is bonded, clol is the magnetic core +
31 (4) is a bonded nonmagnetic substrate. In addition, the front side of such a magnetic head is processed into a convex part, and the rear side thereof is processed to be wide, and in the center of this convex part, a notch extending backward (all) is formed. The headtegg (Hl) (H2) is filled with a shielding material α2 that divides.

Such a magnetic head is manufactured through a process as shown in FIG. 15 (1m1). That is, in Fig. 5 1al, a first magnetic plate α31t made of Sendust or the like is bonded to a non-magnetic substrate (1) and a glass material (2).

By providing a groove ttS as shown in the magnetic plate (13 in FIG. 15 (1) in the same figure) in FIG. The magnetic plate on which the two beams Oe and the protrusion surface are formed is used as a second magnetic plate (13), and a coil is wound around the protrusion aD. Then, the second magnetic plate α3 and the protrusion surface are connected to each other as shown in FIG. The g1 magnetic plate G3, which is not provided with the shown groove, is joined via a gap spacer.

FIG. 15 (A combined object like C1 is formed. Next, this combined object C is processed with two grooves to form the convex part and the rear wide part.

Form a cut etc. for filling the shielding material. After that, a plurality of these magnetic heads are cylindrically ground (thus, they are simultaneously machined to obtain a predetermined depth and curvature, and then sliced.)Thus, a single 2-channel in-line magnetic head shown in factor 16 is obtained. is created.

(c) Problems that the invention attempts to solve In the magnetic hekudo C2 obtained in this way.

Controlling the amount of depth applied by iDl in FIG. 16 is very important for the performance of the magnetic head. That is, if this depth is larger than the effective range amount, the characteristics of the magnetic head cannot be fully exhibited, and if the depth is too small, problems will arise in terms of head life.

Therefore, the manufacturing process of the conventional magnetic head described above (:
In this case, the depth is controlled by the final cylindrical grinding C: Therefore, the depth is controlled by the 16th factor C: Observation from the side of the head. However, if such a construction method was adopted, it had the disadvantage that it required frequent observation from the side, which resulted in poor work efficiency and was not suitable for the slope of the ground. Furthermore, it may not be easy to check the depth end (Dm) due to dirt or the like when joining the magnetic plates together.

This makes accurate depth observation difficult.

Depth control was uncertain (d), which was a major drawback in terms of head performance management.

In order to solve the above-mentioned problems, the present invention solves the above-mentioned problems by bonding a pair of non-magnetic substrates C: flat magnetic cores bonded together, and then filling the front with a shielding material. In an in-line magnetic head ζ2, in which a convex portion with a notch is formed (a wide C2 is formed at the rear of the Yu), and the channels of the head chip are separated by this notch, at least one of the magnetic cores is non-magnetic. A groove for defining the depth is formed on the surface to be bonded to the substrate, and this groove is filled with a bonding material, and depth processing is performed to reach a predetermined depth value. It is configured so that it is exposed or disappears on the moving surface side.

(e) Effect With the magnetic head of the present invention having the above-described configuration, the depth can be easily and accurately controlled during depth processing (-), and the working efficiency can be significantly improved. .

(F) Embodiment First, FIGS. 1 and 2 show the external appearance of the magnetic head of the present invention, and the same components C as in the prior art are given the same reference numerals and their explanations will be omitted.

That is, FIG. 1 shows the state before the depth processing, and the second factor shows the state after the depth processing. Magnetic substrate (9) (
Two new grooves α9 for depth regulation are provided at the joints with 10. Here, the front ends of the grooves tt81α9 for depth regulation begin to be exposed to improve the sliding of the medium during depth processing. It is formed at a position where a predetermined depth value can be obtained when the depth processing is completed at the point in time.

Although the first section and FIG. 2 show a single magnetic head, in the actual manufacturing process, it is an assembly of multiple heads.

Next, method C for manufacturing the above-described magnetic head of the present invention will be explained with reference to FIG. That is.

Fig. 3 (AlTol is a first magnetic plate made of Sendust or the like, so a groove 12υ for depth regulation is provided on the side that connects with a non-magnetic substrate to be described later.The position of this @cn is the depth of the magnetic head, determined by the curvature.Then, the fourth
Factor 11LI(1)l is a magnetic plate (1) bonded to a non-magnetic substrate (2) using a glass material (C2). Fig. 4 shows the grooves for the magnetic plate CAc coil (
By providing a protrusion (24), a protrusion (C) on the rear side is formed by providing a protrusion (24).
The magnetic plate on which the protruding portion (C) is formed is used as a second magnetic plate -, and the protruding portion C25+nicoil is wound around the magnetic plate. after that,
This second magnetic plate (1) and the first magnetic plate (1) without the groove shown in FIG.
It forms a union like Ll(t)l. In addition, the groove for depth regulation (211 (2D) is filled with a bonding material such as glass material for bonding the magnetic plate Then, a front convex part, a rear wide part, a notch for filling the shield material, etc. are formed.Then, a plurality of these magnetic heads are simultaneously machined by cylindrical grinding, and a groove +2B for defining the depth is used to form a predetermined shape. The depth and curvature of the nth index: 1° and the thickness of the second magnetic plate (20) and (20') are each 200 μm.
.

An example in which depth processing was performed with a curvature of 5- when the thickness was 100 μm is shown. In other words, when depth processing is performed under these conditions, the final shape of the media sliding surface at the dotted line position (gap at G1. Junction tP as shown in the figure
I is the gap (G is located 95 μm below, and the junction (PI is located 1 μm below. Therefore, the depth t-
20μm (If you want to set 2, please use the depth regulation groove c!D
The front end is 15 μm from the depth end (CDI).
, 19 μm above. That is, when performing depth processing of a magnetic head, when the front end r2υ of the medium sliding surface (: depth defining groove (211) is exposed, the predetermined depth value of C2 is automatically reached, and by slicing, the second CM as shown in the figure
The ultimate two-channel in-line type magnetic head can be obtained.

Next, FIG. 8 shows another embodiment according to the present invention C.

For simplicity, the curvature of the magnetic head is not considered.

The dotted line in the mouth will be the final shape. That is, in the example opening of the same figure, the lower end (2Dt - predetermined depth) of the depth regulating groove (211) is set in advance above the depth end portion (DH). Then, when depth processing is performed, a predetermined depth will be obtained when the groove for depth regulation (2D) is removed to improve the sliding of the medium.

Next, FIG. 9 shows another embodiment in which a depth regulating groove (211) is provided at an angle of 45 @ at the rear.
Improving media sliding during depth machining by locating on the same surface as This relationship is shown in Fig. 10. In other words, Fig. 10 [alt15I] shows the side surface of the head and the sliding surface when the depth is 50 μm, for example. As shown in the figure C2, in the magnetic head according to this embodiment, the actual depth p1
and C on the media sliding surface: Groove c for regulating hail depth! D
The length is l! 1 matches. Note that (g) is a shielding material. Also, in Figure 11, 1altbl has a depth of 20
It shows the side surface of the head and the media sliding surface when machining with μmt, and in this case too, the length of the groove for depth regulation is I! ) and the actual depth (DJ) match. Furthermore, Fig. 12 11L
I [1) I represents the state where there is no depth,
In this case, there are no depth-defining grooves on the medium sliding surface.

(1) Effects of the Invention As mentioned above, according to the present invention (2), after a pair of non-magnetic substrates (- flat magnetic cores bonded together) are bonded facing each other, the previous item C: With a notch for filling the rolled material. When forming the convex part, the rear part of C2 is made wider.

In an in-line magnetic head in which channels of the head chip are separated by this cut, at least 10,000 grooves are formed on the surface of the magnetic core that is bonded to the non-magnetic substrate. When the predetermined depth value is reached by filling the groove with material (; and performing depth processing, the front end or rear end of this groove becomes exposed or disappears on the medium sliding surface side. Therefore, it is necessary to control the depth during depth processing. can be performed easily and accurately (in two steps), and manufacturing efficiency can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 shows the magnetic head of the present invention before depth processing, FIG. 2 shows the state after depth processing, and FIGS. 6 to 7 show the manufacturing process.
Perspective view and side opening of magnetic plate, Fig. 4 1a+(1)l is No.
1. A perspective view and a side view showing the process of bonding the magnetic plate and the non-magnetic substrate, FIG. A perspective view and a side lfI view of the object, Figure 7 is a diagram showing the depth processing process, Figures 8 and 9 are diagrams each showing other embodiments of the depth processing process, and Figure 10 is a diagram showing the depth processing process. A side view and a front view showing the case where the depth is 50 μm, the 11th factor is a side view and a front view showing the case where the depth is 20 μm, Figure 12 M
l) l is a side view and a front view showing the state with no depth, the 16th factor is a diagram showing a conventional magnetic head, Fig. 14 is an exploded view of it, and the 15th prisoner (cap (1) 11ot shows its manufacturing process) The respective figures shown in Fig. 16 are side views after depth processing. (1) 12J (3) (41... magnetic core, (51 (
7)...Groove for coil, (9)(1(I...Non-magnetic substrate, az...Shield material, (IM'J...Groove for depth regulation.

Claims (1)

[Claims] (1) After bonding a pair of non-magnetic substrates with a flat magnetic core bonded to each other, a convex portion with a notch for filling the shielding material is formed in front of the non-magnetic substrate, and a convex portion with a notch for filling the shielding material is formed at the rear thereof. In an in-line magnetic head that separates the channels of a head chip, a depth-defining groove is formed on the surface of at least one of the magnetic cores that is bonded to the non-magnetic substrate, and this groove is filled with a bonding material to perform depth processing. A magnetic head characterized in that when a predetermined depth value is reached by performing this process, the front end or rear end of the groove is exposed on the medium sliding surface side or disappears.