JPS5972637A - Thin film magnetic head - Google Patents

Abstract

PURPOSE:To prevent the deterioration in the insulating performance due to working and slide-contact of a magnetic tape, by projecting the end of an MR element thin film from the end line of a conductor band provided on a base and overlapping the end of a lead 5 onto the end of the conductor band. CONSTITUTION:A thin film magnetic head consists of a base plate 1, the conductor band for bias current supply, an insulating layer 3, an MR element 4, and the lead 5. The thin film layer 4 is formed into coil shape, the projecting end 6 is an electric lead, the end 6 is projected from the end line 7 of the conductor band 2 and the end 8 of the lead 5 is overlapped onto the end line 7 of the conductor band 2. Since the lead 5 is not exposed at a magnetic tape sliding face 9, the deterioration in the insulation due to the processing and sliding of the magnetic tape is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thin film magnetic head, particularly a magnetoresistive thin film magnetic head for reproduction.

Conventionally, this kind of magnetoresistive thin film magnetic head for reproduction has a structure as shown in FIGS. 12. An insulating layer 13 and a magnetoresistive element (hereinafter abbreviated as MR element) 14 are laminated, and lead wires 15 are provided at the left and right ends of the M element to derive all electrical signals. 15 is formed. The thin film magnetic head A configured in this manner comes into contact with a magnetic tape (not shown) at the magnetic tape sliding surface 16.
Information can be played back.

Generally, the multilayers described above are extremely thin, for example, the insulating layer 13
is 5,000^, and MR sweets 14 is 500 dai.

The lead wire 15 has a mechanical strength of about 2500A, so its mechanical strength is extremely low. However, in the conventional type described above, the lead wire 15.15 extends to the magnetic tape sliding surface 16, so the thin film When the magnetic head A is subjected to machining such as cutting or wrapping, a left-hand edge is formed at the tip of the lead wire 15 and comes into contact with the conductor band 12, as shown in FIG. There was a drawback. In addition, there is a possibility that such a phenomenon may occur not only during processing of the thin-film magnetic head but also due to sliding contact of the magnetic tape.
This caused a decrease in the reliability of thin film magnetic heads.

The purpose of the present invention is to solve the above-mentioned drawbacks of the conventional ones,
An object of the present invention is to provide a thin film magnetic head in which there is no possibility that the insulation properties will deteriorate due to processing or sliding contact of a magnetic tape.

Below, the configuration of the present invention will be explained as shown in FIGS. 4 and 5, which are examples thereof.
This will be explained based on the diagram.

In the figure, 1 is a base, 2 is a conductor band for supplying a non-wire current, 3 is an insulating layer, 4 is an MR element, and 5 is a lead wire. As shown in the figure, the thin film layer 4 is formed in a U-shape tt, and its protruding end 6 serves as an electrical signal deriving part, and the protruding end 6 also serves as an end line 7 of the conductor band 2. The end 8 of the lead wire 5, which projects and is to be connected thereto, overlaps the end wire 7 of the conductor strip 2. With the above configuration, the lead wire 5
is not exposed on the sliding surface 9 side of the magnetic tape, and therefore, there is no running hem in the lead wire 5 due to the processing of the thin film magnetic head or the sliding contact of the magnetic tape as in conventional ones, and the insulation properties are extremely high. Becomes good. Further, since the end portion 8 of the lead wire 5 is formed by auto-cooling the end wire 7 of the conductor band 2, the adhesion to the M-type element 4 is good, and there is no risk of breakage or the like.

According to the thin film magnetic head according to the present invention, the conductor band for supplying a common noise power supply provided on the insulating pace plate;
A magnetoresistive thin film for reproduction including an MR element consisting of a magnetoresistive thin film layer with an insulating layer on its upper surface, and a glue-P line for deriving a stain signal from the thin film layer. In the magnetic head, the MR element is formed in a C-shape, and the protruding end thereof serves as an electric signal lead-out part, and the protruding part protrudes beyond the end line of the conductor band. Since the end of the lead wire to be connected to this overlaps the conductor band end wire, the lead wire can be easily connected to the lead wire by processing the thin film magnetic head or slidingly connecting the magnetic tape. This does not occur, and the insulation is extremely good. In addition, since the lead wire and the thin film layer have good closeness, there is no risk of cutting, etc., and the lead wire has an excellent length.

[Brief explanation of the drawing]

1 to 3 show a conventional N-film magnetic head.
The figure is a plan view, Figure 2 is a front view, Figure 3 is a cross-sectional view, Figures 4 and 5 are full examples of the thin film magnetic head according to the present invention, and Figure 4 is a patent application filed for patent application. People Trio Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] An MR element consisting of a conductor band for supplying common and noisy power provided on an insulating base plate, and a magnetoresistive thin film layer placed on the top surface of the conductor band with an insulating layer interposed therebetween. , a magnetoresistive thin film magnetic head for reproduction including a lead wire for leading out all electric signals from the MR element, the MR element is formed in a U-shape, and the protruding end thereof is electrically connected. In addition to serving as a signal derivation part, the protrusion protrudes by a distance υ from the conductor band end line, and the end of the lead wire to be connected to this protrusion overlaps the conductor band end line. Thin film magnetic spatula F0 with a % characteristic of