JPS58212614A - Composite type thin film magnetic head - Google Patents

Abstract

PURPOSE:To attain recording and reproducing with high density by arranging respective head arrays for recording and reproducing so that respective head elements are separated each other and met with the abutted surfaces upon a tape at right angles. CONSTITUTION:Protective layers 12, 13 are formed with angles so that their width on the side of the head elements 3, 6 is wider than the other side. Consequently, the head arrays 1, 4 are arranged so that respective head elements 3, 6 are separated each other and met with the abutted surface 14a upon a tape at right angles. Namely, the head arrays are arranged so that an angle beta1 made by the recording head element 3 and the abutted surface 14a upon the tape and an angle beta1 made by the reproducing head element 6 and the abutted surface 14a are 90 deg. respectively. Since the respective head arrays 3, 6 are separated each other in the magnetic head 14, recording and reproducing are not interfered each other electrically even if both the operations are performed simultaneously. Since the head elements 3, 6 are arranged so as to meet with the abutted surface at right angles, these elements are perpendicularly abutted upon the magnetic tape 11.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite thin-film magnetic head used in various types of cage devices that perform smooth recording and reproduction using a magnetic recording method.

In general, in various tape devices, when a magnetic head made of ferrite is used, the KFi recording and reproducing functions are performed by one magnetic head, but when a thin film magnetic head is used, the recording head Usually, a magnetic head and a reproducing head are provided separately, and the pair constitutes one magnetic head. A single-turn or multi-turn inductive tape head is usually used as a recording head, and a magnetoresistive head (hereinafter abbreviated as MR type) is used as a reproducing head.

Figure 1.2 shows a general recording thin film magnetic RAD array (hereinafter abbreviated as recording RAD array), and the recording RAD array 1 consists of an inducting head with a width Wl at one end on a substrate 2. It is formed by arranging a plurality of recording head elements 3. Further, FIG. 3-4 shows a general thin-film magnetic RAD array for reproduction (hereinafter abbreviated as RAD array for reproduction).
It is formed by arranging a plurality of R-shaped reproducing head elements 6.

FIG. 5 shows a conventional composite thin-film magnetic head which is formed by integrating such a recording RAD array 1 and a reproducing RAD array 4, and 7.8 indicates the recording and reproducing RAD arrays 1 and 4, respectively. The protective layer 9 affixed to is an adhesive such as epoxy or glass for bonding each head array 1.4 together through the respective protective layer 7.8. At the time of bonding, the track positions of the head elements 3 and 6 of each head array 1.4 are aligned and bonded, and as a result, a composite thin film magnetic head 10 is formed. 11 is a magnetic tape that comes into contact with the magnetic head 10, and 10a is an arcuate contact surface with a magnetic tube 11 formed on each head element 3.6 side of the magnetic head 10.

In the conventional magnetic head 10 described above, each head array 1.4 is arranged in parallel and close to each other. Therefore, when recording and reproducing are performed simultaneously, leakage signals from the recording RAD array 1 appear as noise in the reproducing RAD array 4, which is not suitable when recording and reproducing are performed simultaneously. Further, the tape contact surface 10a of the magnetic head 10 is generally formed in a circular arc shape, and the angle α between the recording head element 3 and the tape contact surface 10a and the contact between the reproduction head element 6 and the tape are Angle β with surface 10a
are both smaller than the right angle. The angles α and β become smaller than 90° as the distance between the head elements 3 and 6 becomes larger. Therefore, each of the head elements 3 and 6 comes into contact with the magnetic tape 11 at an angle, and both the recorded signal transferred to the magnetic cage IIK and the reproduced signal reproduced from this recorded signal are distorted and become high. Dense recording and playback becomes impossible. Further, the recording efficiency of the recording RAD array 1 and the reproducing efficiency of the reproducing RAD array 4 are both reduced and the gap length is widened, which also makes high-density recording and reproduction impossible.

The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and provides a composite thin film magnetic field capable of simultaneously performing recording and reproducing simultaneously and with high density recording and reproducing. Then, the purpose is 1.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 6, 12.13 indicates each head array 1.
4, each head array 1.4 is attached to each head element 3 by adhesive 9 through the protective layer 12.13.
, 6 are integrally glued so that the track positions match,
A composite thin film magnetic head 14 is formed. 14m is an arcuate tape contact surface formed on each element 3.6 side of this magnetic helad 14. The protective layers 12 and 13 cover the head elements 3 and 6.
Therefore, each head array 1.4 has its head elements 3.6 separated from each other and the bed element 3.6 at a 90° angle to the tape contact surface 14m.
It is arranged so that That is, the angle α between the recording head element 3 and the tape contact surface 14a and the angle β between the reproduction head element 6 and the tape contact surface 14a are both 90°.
It is arranged so that

In the magnetic head 14 having the above configuration, each head element 3
．． Since the numbers 6 and 6 are different from each other, there is no mutual electrical interference even when recording and reproducing are performed at the same time, so that recording and reproducing can be performed satisfactorily at the same time. In addition, each head element 3
．． 6 is disposed at 90° with respect to the tape contacting surface 14a, so that it contacts the magnetic chip 11 perpendicularly. For this reason, high-density recording and reproduction can be performed without causing distortion or reduction in efficiency in the recording signal and reproduction signal, and without fear of widening the gap length.

In the above embodiment, the recording head array 1 and the reproducing head array 4 are arranged in this order with respect to the traveling direction of the magnetic chip 11 shown by the arrow, but the arrangement may be reversed.

As described above, in the present invention, the recording and reproducing head arrays are arranged such that the respective head elements are separated from each other and are at 90 degrees with the tape contact surface. Therefore, the spacing between the head elements becomes large, and electrical interference between them does not occur, so that recording and reproduction can be performed simultaneously and satisfactorily. Furthermore, since each head element contacts the magnetic tape perpendicularly, there is no distortion or reduction in efficiency during recording and reproduction, and no widening of the gap length occurs, making it possible to perform high-density recording and reproduction.

[Brief explanation of the drawing]

Figures 1 and 2 are a plan view and a vertical side view of a general thin film magnetic head array for recording, respectively, Figures 3 and 4 are a plan view and a vertical side view of a general thin film magnetic head array for reproduction, and Figure 5 The figure is a cross-sectional view of a conventional composite thin-film magnetic head.
The figure is a sectional view of a composite thin-film magnetic head according to the present invention. l... Thin film magnetic RAD array for recording, 3... Head element for recording, 4... Thin film magnetic RAD array for reproduction, 6
. . . Reproducing head element, 11 . . . Magnetic tape, 14
. . . Composite thin film magnetic head, 14a . . . Tape contact surface. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Shin Kuzuno - Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure O

Claims (1)

[Claims] (1) A thin film magnetic RAD array for recording in which a plurality of recording head elements are arranged at one end and a thin film magnetic RAD array for reproduction in which a plurality of reproducing head elements are arranged at one end are arranged so that the track position of each head element is In a composite thin-film magnetic head in which the recording thin-film magnetic head array and the reproducing thin-film magnetic head array are integrated with each other and have arcuate tape contact surfaces formed on each head element side, each head element is integrated with the other. A composite thin film magnetic head characterized in that the head is separated from the tape and is arranged at an angle of 90 degrees with the tape contact surface.