JP2776824B2 - Terminal pull-out method for multitrack thin film magnetic head - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal drawing method of a multi-track thin-film magnetic head, and more particularly to a terminal arrangement of a head suitable for high-density connection between a head and a driving circuit.

[Conventional technology]

A conventional method of extracting a terminal from a multi-track thin-film magnetic head has been described in Japanese Utility Model Application Laid-Open No. 60-1335813. That is, the terminals are provided in parallel with the surface facing the recording medium as in a one-turn recording head in FIG. 10 so as not to cross between adjacent tracks. Here, FIG. 11 shows a pattern in the case where the thin film pattern is a two-turn recording head, and FIG. 12 shows a pattern in the case of a magnetoresistive head having a center tap.

[Problems to be solved by the invention]

In the above prior art, the increase in the number of terminals due to the increase in the track density is not taken into consideration, and the pitch of the terminals 3 is reduced due to the increase in the density, and it is difficult to connect to an external circuit. become. The improvement can be achieved by making the terminal lead-out portion larger than the pitch of the track at the head end (that is, widening the back surface of the head element). However, this leads to an increase in the size of the head element block, and as a result, 1
It is not preferable because the number of element blocks per wafer is reduced.

An object of the present invention is to make it easy to pull out the terminals without lowering the pitch between terminals at the terminal portions 3 of such a thin film head.

[Means for solving the problem]

The above object is achieved by arranging a plurality of terminals on the element surface forming the multi-track thin-film magnetic head in the back direction with respect to the surface of the recording / reproducing element facing the recording medium.

[Action]

The terminals provided in the back direction with respect to the recording / reproducing element and the facing surface of the medium do not narrow the pitch between the terminals. Therefore, the terminal pitch of the multitrack head can be substantially equal to or larger than the track pitch, so that the terminals can be easily pulled out.

〔Example〕

Hereinafter, first and second embodiments of the present invention will be described with reference to FIGS. 1, 2, and 3. FIG.

FIG. 1 is a diagram showing an embodiment of a one-turn recording head,
FIG. 2 is a diagram showing an embodiment of a two-turn recording head, and FIG. 3 is a diagram showing a section AA 'of FIG.

The configuration of the first and second embodiments will be described. A thin-film conductor layer 2 is formed in a coil shape on an insulator magnetic substrate 1, and an insulation layer 4 is formed on a portion where the conductor layer 2 is not provided. At this time, the pattern of the conductor layer 2 includes the back gap 6 made of the insulating layer 4 and the terminal portion 3 is moved in the direction opposite to the facing surface 10 of the medium as shown in FIGS. Are arranged in two. Further, a counter substrate 5 made of an insulating magnetic material is fixed on the substrate on which the conductor layer 2 and the insulating layer 4 are formed with an adhesive layer 11.

A third embodiment of the present invention will be described with reference to FIG. 4 and FIG. 5 which is a sectional view taken along the line BB '.

This embodiment is a reproducing head using, for example, a magnetoresistive element 7 having a center tamper. A first insulating layer 41 is formed on the magnetic substrate 1, and a shunt bias film 8 for supplying a bias magnetic field to the magnetoresistive element 7 is formed.
74523 magnetic transducer). After the magnetoresistive element 7 and the thin conductor layer 2 are formed thereon, a second insulating layer 42 is formed. At this time, as shown in FIG. 4, the conductor layer 2 is pattern-formed so that two terminal portions 3 are arranged in the back direction with respect to the facing surface 10 of the medium. Further, a counter substrate 5 made of a magnetic material is bonded to form a reproducing head.

 A fourth embodiment of the present invention will be described with reference to FIG.

This embodiment relates to a recording head using a two-turn thin-film coil. As shown in FIG. 6, a terminal portion 31 of the first head and a terminal portion 32 of the second head are formed on the insulating magnetic substrate 1, and two pairs are formed in the back direction with respect to the contact surface 10 of the medium. A conductor pattern of two adjacent heads is formed on the conductor layer 2 such that four terminals are arranged.

According to the present embodiment, the pitch between the terminals in the track width direction can be set to almost twice the track pitch, and the connection with the connecting means to the external circuit becomes extremely easy.

Also, as shown in FIG. 7, the terminal 31 of the embodiment of FIG.
By exchanging the 32 positions, the pattern length of the conductor 2 can be shortened, and the resistance component of the head can be reduced and the efficiency can be increased.

 A fifth embodiment of the present invention will be described with reference to FIG.

This embodiment relates to a reproducing head using a magnetoresistive element with a center tap.

As shown in FIG. 8, a first head terminal portion 31 and a second head terminal portion 32 are formed on the magnetic substrate 1, and two sets of four terminals are provided in the back direction with respect to the facing surface 10 of the medium. A conductor pattern of two adjacent heads is formed on the conductor layer 2 so as to be arranged.

According to the present embodiment, the pitch between the terminals in the track width direction can be set to almost twice the track pitch, and the connection with the connecting means to the external circuit becomes extremely easy.

Also, as shown in FIG. 9, it is apparent that the same effect can be obtained even if the terminal positions of the embodiment of FIG. 8 are exchanged.

A sixth embodiment according to the present invention will be described with reference to FIG.

FIG. 13 is a view showing a means for connecting a terminal of a head having the terminal arrangement shown in the first to fifth embodiments to an external circuit.

Terminals arranged in the back direction with respect to the surface 10 facing the medium
A multi-conductor film-like cable composed of insulating films 71, 72 and conductors 61, 62 is connected to 31, 32.

According to this embodiment, the conductor pitch of the film-shaped cable to be used can be the pitch between the terminals in the track width direction of the terminal portions 31 and 32, and an inexpensive cable having a large conductor pitch can be used. Further, since the conductor width of the cable can be increased, a reduction in loss due to a reduction in conductor resistance can be expected.

〔The invention's effect〕

According to the present invention, the pitch between the terminals at the terminal portion of the thin-film head can be extended almost to the pitch between the tracks or more without expanding the element block of the head in the track width direction. Connection becomes easy, and a film-like cable having a large pitch between conductors can be used, and the cost is reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a one-turn recording head of the first embodiment of the present invention, FIG. 2 is a diagram showing a two-turn recording head of the second embodiment, and FIG. 3 is a sectional view A of FIG. FIG. 4A shows a third embodiment using a magnetoresistive element with a center tap, FIG. 4B shows a sectional view taken along the line BB 'of FIG. 4, FIG. FIGS. 8 and 9 show a fifth embodiment, FIGS. 10 to 12 show conventional examples, and FIG. 13 shows an external circuit. It is a figure which shows the 6th Example of this invention including the connection means of FIG. DESCRIPTION OF SYMBOLS 1 ... Magnetic substrate, 2 ... Thin film conductor layer, 3, 31, 32 ... Terminal surface, 4 ... Thin film insulating layer, 5 ... Counter substrate, 6 ... Back gap, 7 ... Magnetoresistance effect element, 8 ... Shunt bias film, 10 ... Opposite surface with medium, 11 ... Adhesive layer, 61, 6
2 ... conductor, 71, 72 ... insulating film.

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiyuki Fujishima 1-280 Higashi Koikebo, Kokubunji-shi, Tokyo Inside the Central Research Laboratory, Hitachi, Ltd. (56) References JP-A-57-12409 (JP, A) JP-A-64 -50209 (JP, A) Actually open 58-97717 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) G11B 5/31 G11B 5/39

Claims (1)

(57) [Claims] 1. A multi-track thin-film magnetic head comprising a plurality of adjacent magnetic recording / reproducing thin-film head elements and terminals serving as connecting means for driving the head elements.
The terminal is on the same plane as the thin-film magnetic head element,
Along with being arranged in the back direction of the surface facing the recording / reproducing medium, the length of the terminal in the track width direction is
A terminal drawing method for a multi-track thin film magnetic head, wherein the terminal is arranged so as to be narrower than a track width of the head element.