JPS62114114A - Magnetic head using magneto-resistance effect element - Google Patents

Abstract

PURPOSE:To reduce the cost and to facilitate the manufacture by adhering a magneto-resistance effect element provided with a magnetism detection part on a base onto the base, utilizing a throughhole of the base so as to connect an external terminal of the element thereby facilitating the alignment of the element. CONSTITUTION:One face of a wear resistance base 1 is provided with the magnetism detection part 2 having a required pattern made of a ferromagnetic thin film and external terminals 5, 6 to constitute the magneto-resistance effect element MR. The element MR and a connection part D are adhered onto the base A having a throughhole 7 at a position opposed to the terminals 5, 6, and the terminals 5, 6 and an exposed terminal of the part D are soldered by inserting an iron solder through the throughhole 7. Thus, the element MR is positioned correctly and since the throughhole is sued to facilitate the connection with the external terminal, the cost is reduced and the manufacture is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a magnetic head using a magnetoresistive element.

(Prior Art) A magnetic head using a magnetoresistive element is a magnetic head for reproducing signals recorded across a magnetic tape in order to locate the beginning of a magnetic signal recorded on a magnetic tape. It has traditionally been used in magnetic recording and playback devices.

By the way, in a general configuration of a magnetic head using a magnetoresistive element, a magnetic tape and A base member made of a metal plate, in which a part that becomes a part of the sliding surface of the magnetoresistive element and a part on which the magnetoresistive element and the permanent magnet are mounted and fixed are integrally formed, and 2 of patterns made of ferromagnetic material adhered to a wear-resistant substrate in an element
Correctly install two lead members made of metal plates to be electrically connected to each terminal,
A synthetic resin material is injected into the mold, and the one base member made of metal plate and the two lead members made of metal plate are integrally embedded in the case of the magnetic head. Then, using the space of the notch formed in the case of the magnetic head, the magnetoresistive element and the permanent magnet in the base member made of the metal plate described above in the case of the magnetic head are made. The surface of the magnetoresistive element, which will be the sliding contact surface with the magnetic tape, is the surface of the part of the base member made of the metal plate that will be part of the sliding contact surface. The magnetoresistive element is fixed so that the magnetoresistive elements are flush with each other, and a permanent magnet that generates a bias magnetic field to be applied to the magnetoresistive element is located behind the magnetoresistive element. Then, after electrically connecting the terminal portion of the required pattern of the magnetoresistive element and the connecting portion of the two metal plate lead members by soldering or wire bonding, the magnetic It was constructed by filling a notch formed in the case of the head with synthetic resin.

(Problems to be Solved by the Invention) However, in the general configuration of the magnetic head using the above-mentioned magnetoresistive element, some of its components, that is, one metal plate When manufacturing by injection molding a base member and two lead members made of metal plates embedded in a case of a magnetic head, it is necessary to correctly position each component in the mold, The surface of the magnetoresistive element that is in sliding contact with the magnetic tape is on the same plane as the surface of the part of the metal plate base member that is part of the sliding surface of the metal plate member. When fixing the magnetoresistive element in such a manner, it is necessary to correctly position the magnetoresistive element, which requires a large number of man-hours during manufacturing.

(Means for Solving the Problems) The present invention provides a magnetic detection section formed of a desired pattern of a thin film of ferromagnetic material on one surface of a substrate having wear resistance, and a magnetic detection section electrically connected to the above-mentioned magnetic detection section. A magnetoresistive element member on which an external terminal is provided, and a surface of the substrate of the magnetoresistive element member on which the magnetic detection section and external terminal are provided are bonded to a predetermined area. A through hole is provided in a region corresponding to the external terminal, and the base body of the magnetic head has at least the outer shape of a half of the case of the magnetic head, and the outer part of the magnetoresistive element member described above. The present invention provides a magnetic head using a magnetoresistive element configured with a flexible connecting wire portion connected to a terminal.

(Example) Hereinafter, specific details of a magnetic head using the magnetoresistive element of the present invention will be described in detail with reference to the accompanying drawings. 1 and 6 are perspective views of an embodiment of a container for a magnetic head using the magnetoresistive element of the present invention,
2 is an exploded perspective view of a magnetic head using the magnetoresistive element shown in FIG. 1, and FIGS. 3 to 5 are an exploded perspective view of a magnetic head using the magnetoresistive element shown in FIG. A perspective view for explaining the manufacturing process of the magnetic head, FIG. 7 is an exploded perspective view of a magnetic head using the magnetoresistive element shown in FIG. 6, and FIG. 8 shows the magnetoresistive effect shown in FIG. 6. 9 is a perspective view from the back of a magnetic head using an element, in which NR is a magnetoresistive element member, and this magnetoresistive element member MR is made of, for example, glass as shown in FIG. On one surface of a substrate 1 having such abrasion resistance, a magnetic detecting section 2 formed of a desired pattern of a thin film of ferromagnetic material is electrically connected to the magnetic detecting section 2 by lead wire sections 3 and 4. The external terminals 5 and 6 are provided.

In the magnetic head shown in the embodiment of the magnetic head using the magnetoresistive element of the present invention shown in FIGS. 1 and 6, A is the base body of the magnetic head; The surface of the substrate 1 of the magnetoresistive element member MH on which the magnetic detection section 2 and the external terminals 5 and 6 are provided corresponds to the external terminals 5 and 6 in the predetermined area to be bonded. A through hole 7 is provided in the outer portion of the magnetic head, and the magnetic head is configured to have at least the outer shape of a half of the case of the magnetic head.

The base A of the magnetic head in the embodiment shown in the first diagram is made of, for example, flat glass, and the case of the magnetic head in the embodiment shown in the first diagram is composed of the base A of the magnetic head described above and the magnetic head described above. It is composed of plate members B and C to be adhered to the upper surface of the base body A. For example, glass plates can be used as the plate members B and C described above.

Further, as the base body A of the magnetic head in the embodiment shown in the sixth figure, a molded product made of, for example, a suitable synthetic tree M can be used. The base A is a case of a magnetic head.

D is a flexible connecting wire portion connected to the external terminals 5 and 6 in the magnetoresistive element member MH, which is not shown in each figure as the flexible connecting wire portion. In addition to using a flexible printed wiring board such as the one shown in FIG.

Now, the magnetic head using the magnetoresistive element of the present invention shown in FIG. After properly adhering the magnetoresistive element member MR, the magnetoresistive element member MR, and the plate members B and C to their respective predetermined positions, using the through hole 7 formed in the base body A of the magnetic head, Insert a soldering iron from the surface 11 side opposite to the surface 8 described above, and connect the external terminals 5 and 6 in the magnetoresistive cable member HR and the exposed ends 9 and 10 of the conductor in the connection line portion. After soldering, the through holes 7 made in the base A of the magnetic head are filled with a suitable synthetic resin as necessary. Next, as shown in FIGS. An example of how the magnetic head using the magnetoresistive element of the present invention shown in FIG. 1 is manufactured will be described with reference to FIG.

First, a connection end 9, which is a mist sprayed at one end of the connection line, is attached to the through hole 7 formed in the base A of the magnetic head shown in the exploded perspective view of FIG. , 10 are positioned using a jig, and the connecting line portion is adhered to the surface 8 of the base A of the magnetic head. This state is shown in FIG.

Next, use a jig so that the external terminals 5 and 6 of the magnetic low resistance effect element member MR are correctly positioned in the through hole 7 formed in the base body A of the magnetic head in the state shown in the third figure. is used to set the position of the magnetoresistive element member MR, and adhere the magnetoresistive element member MR to the surface 8 of the base body A of the magnetic head. This state is shown in FIG.

Next, a plate member B is attached to the surface 8 of the base body A of the magnetic head.

Glue C. This state is shown in FIG. 5, which is a view seen from the surface 11 side. Next, a soldering iron is inserted through the through hole 7 shown in FIG. 5 to connect the connecting end 9 of the connecting line. lO and magnetoresistive element member M
Solder the external terminals 5 and 6 at R. Although the above-mentioned through-hole 7 may be left as is, filling the through-hole 7 with a suitable synthetic resin is a desirable embodiment from the viewpoint of protecting the above-mentioned connection portion.

After bonding the plate members B and C to the surface 8 of the base A of the magnetic head in the state shown in Figure 5, the magnetic head shown in Figure 1 is polished by polishing the sliding contact surface of the magnetic head. A magnetic head using a resistive effect element can be obtained.

Furthermore, the magnetic head using the magnetoresistive element of the present invention shown in FIG. After sequentially bonding the connecting wire portion and the magnetoresistive element member MR to the position, a soldering iron is applied from the surface 11 side using the through hole 7 drilled in the base body A of the magnetic head. Insert the external terminals 5, 6 in the magnetoresistive element member MR, and the mist ends 9, 10 of the conductor in the connection line portion.
After soldering, the through hole 7 made in the base A of the magnetic head is filled with a suitable synthetic resin as necessary.
An example of how a magnetic head using the magnetoresistive element of the present invention shown in FIG. 6 is manufactured will be described with reference to FIGS. 8 to 8.

First, a connecting end 9 is inserted into the through hole 7 formed in the base A of the magnetic head shown in the exploded perspective view of FIG. 7, and is exposed at one end of the connecting wire. The position of the connecting line portion is set using a jig so that IO is located, and the connecting line portion is adhered to the bottom surface of the recess 12 in the base body A of the magnetic head. Next, the external terminals 5 and 6 of the magnetoresistive element member MH are positioned correctly in the through hole 7 formed in the base body A of the magnetic head, and the substrate of the magnetoresistive element member MR is Fit the magnetoresistive element member MR into the recess 13 in the base body A of the magnetic head so that the front surface of the magnetoresistive element member MR is aligned with the front face of the base body A of the magnetic head. It is glued into the recess 13.

Next, a soldering iron is inserted through the through hole 7 of the base A of the magnetic head shown in FIG. 8, and the connecting end 9. IO and the external terminals 5 and 6 of the magnetoresistive element member MR are soldered.

The above-mentioned through hole 7 may be left as is, but
Filling the through holes 7 with a suitable synthetic resin is a desirable embodiment from the viewpoint of protecting the connection portions described above.Next, the sliding surface of the magnetic head is polished. Thus, a magnetic head using the magnetoresistive element shown in FIG. 6 can be obtained.

(Effects) As is clear from the detailed explanation below,
A magnetic head using the magnetoresistive element of the present invention includes a magnetic detecting section formed of a desired pattern of a thin film of ferromagnetic material on one surface of a wear-resistant substrate, and electrically connected to the magnetic detecting section. A magnetoresistive element member on which an external terminal is provided, and a surface of the substrate of the magnetoresistive element member on which the magnetic detection section and external terminal are provided are bonded to a predetermined area. A through hole is provided in a region corresponding to the external terminal, and the base body of the magnetic head has at least the outer shape of a half of the case of the magnetic head, and the outer part of the magnetoresistive element member described above. In the magnetic head using the magnetoresistive element of the present invention, a thin film of ferromagnetic material is formed on one surface of a substrate having wear resistance. A magnetic detection section with a required pattern according to
2 = Using a magnetoresistive element member configured such that it is provided with a connected external terminal, the surface on which the predetermined pattern is attached is attached to a magnetic head used as a case of a magnetic head. By bonding directly to one surface of the base of the head, the base of the magnetic head described above can be used as the upper substrate of a conventional magnetoresistive element comprising an upper substrate and a lower substrate. Therefore, the number of man-hours required to manufacture a magnetic head constructed using a conventional magnetoresistive element is reduced, and a flexible printed wiring board or an insulating material is used as a lead wire for the magnetoresistive element member. Since the coated electric wire is connected to the external terminal of the magnetoresistive element member using a through hole drilled in the base of the magnetic head, the magnetic head can be manufactured at low cost. According to the present invention, all of the above-mentioned conventional problems can be satisfactorily solved.

[Brief explanation of drawings]

1 and 6 are perspective views of embodiments of a magnetic head using the magnetoresistive element of the present invention, and FIG. 2 is an exploded perspective view of the magnetic head using the magnetoresistive element shown in FIG. 3 to 5 are perspective views for explaining the manufacturing process of a magnetic head using the magnetoresistive element shown in Fig. 1, and Figs. 7 and 8 are magnetic heads using the magnetoresistive element shown in Fig. 6. FIG. 9 is a perspective view of the magnetoresistive element member. 1... Substrate having wear resistance, 2... Magnetic detection section with a desired pattern made of a ferromagnetic material thin film, 3.4.
...Lead wire part 5.6...External terminal, 7...Through hole,
12.13... Concavity, A... Base of magnetic head. B, C...Plate member, D...Connection line portion 1MR...Magnetoresistive effect element member,

Claims (1)

[Scope of Claims] 1. A magnetic detection section formed of a desired pattern of a thin film of ferromagnetic material on one surface of a substrate having wear resistance, and an external terminal electrically connected to the magnetic detection section. The provided magnetoresistive element member and the external terminal in a predetermined area to be bonded to the surface of the substrate of the magnetoresistive element member on which the magnetic detection section and the external terminal are provided. The base body of the magnetic head is provided with a through hole in a corresponding portion and has the outer shape of at least a half of the case of the magnetic head, and can be connected to the external terminal of the magnetoresistive element member described above. A magnetic head 2 using a magnetoresistive element constituted by a flexible connecting wire portion, and a magnetoresistive element according to claim 1 in which the base of the magnetic head is constituted by a glass plate. A magnetic head 3, a magnetic head 4 using the magnetoresistive element according to claim 1, in which the base of the magnetic head is made of a synthetic resin molded product, and a through hole in the base of the magnetic head is made of synthetic resin. A magnetic head 5 using the magnetoresistive element according to claim 1, wherein the magnetic head 5 is embedded with a flexible printed wiring board as a flexible connection line portion, claim 1 A magnetic head 6 using the magnetoresistive element according to claim 1, and a magnetic head using the magnetoresistive element according to claim 1, which uses an insulating wire as a flexible connecting wire.