JPH0638005U - Thin film head slider - Google Patents

Abstract

(57) [Abstract] [Purpose] When the exciting coil terminal of the thin film head chip mounted on the slider body is drawn to the outside, its lead wire is prevented from coming into contact with the medium drum. A slider portion 2a having at least two side rails 7 for generating a positive levitation force on a surface with respect to a medium drum, and a thin film head chip 9a mounted between the side rails 7 of the slider portion 2a. Become. The thin film head chip 9a is provided with via holes 12 _{1 to} 12n for drawing out the respective internal terminals of the coil for exciting the magnetic core to the outside of the surface facing the air bearing surface, and on the peripheral surfaces of these via holes. Connecting terminals are formed respectively, and lead wires 14 are connected to these connecting terminals 13 ₁ to 13 n.
Connect. As a result, the terminals for the exciting coil of the thin film head chip 9a can be taken out from the side opposite to the air bearing surface of the medium drum.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a thin film head slider for flying a thin film head (also referred to as a thin film magnetic head) by rotation of a medium drum in a magnetic printing apparatus or the like, and particularly to an exciting coil terminal of a thin film head chip mounted on the slider body. It is related to the drawing and wiring structure of.

[0002]

[Prior art]

 Hereinafter, a case where this type of flying slider is applied to a magnetic printing apparatus will be described as an example. As is generally known, a magnetic printing apparatus is a magnetic latent image of printing information on a magnetic drum by the magnetic head for recording while floating and moving the magnetic head for recording in the axial direction of a magnetic drum that rotates at high speed. Is formed, is developed with a magnetic toner, and is then transferred to recording paper.

As a magnetic head for this magnetic printing apparatus, a magnetic head generally used in a magnetic recording apparatus such as a magnetic disk can be used, and there are a monolithic (bulk) type and a thin film type, but a multi-channel type. The thin film type is superior in terms of high speed, high definition recording and high speed. In this thin-film magnetic head, for example, an exciting coil and an upper core that crosses a part of the coil are formed by a thin-film forming technique on a magnetic substrate that serves as a lower core. Since the end of the junction surface of is a magnetic gap, the head magnetic field that contributes to recording is steep, high-definition recording can be performed, and it has excellent features such as high speed because of low inductance. ing.

By the way, when such a thin film magnetic head is incorporated in a magnetic printing apparatus, the thin film magnetic head is mounted on a slider in order to float at a predetermined spacing by the rotation of the magnetic drum. In this case, the thin film magnetic head is mounted on a side surface different from the air bearing surface of the slider, and the upper and lower magnetic cores are arranged perpendicular to the magnetic drum, which is called a vertical type.

However, in a flying slider in which such a vertical thin-film magnetic head is mounted on a slider, it is difficult to set a wide gap between the upper and lower cores when manufacturing the thin-film magnetic head, so that the magnetic flux in the rear part may reach between the cores before it reaches the gap tip. There is a limit to miniaturization and high precision of the thin film magnetic head because it leaks, the magnetic efficiency is lowered, or the magnetic pole needs to be mechanically polished to a predetermined gap depth when manufacturing the head. This has been a factor in hindering the multi-channel structure in which a large number of thin film magnetic heads are arranged in parallel.

On the other hand, as a structure for facilitating multi-channelization, a horizontal type thin film magnetic head is used instead of a normal vertical type thin film magnetic head, and the horizontal type thin film magnetic head is surface-mounted between side rails. It is possible to use a slider. Before describing the structure, an outline of the magnetic printing apparatus will be described with reference to FIG. 3 for easy understanding.

The magnetic printing apparatus rotates the magnetic drum 1 at a high speed as described above, and scans the slider 2A in the axial direction of the magnetic drum 1 while floating the flying slider 2A described later by the rotation of the drum. As a result, a magnetic head mounted on the flying slider 2A forms a magnetic latent image of printing information on the magnetic drum 1, and the latent image is developed with magnetic toner and transferred to recording paper.

However, FIG. 3 shows a state in which the flying slider 2A is levitated by the rotation of the magnetic drum 1. An arrow a indicates the rotational direction of the magnetic drum 1, and 3 indicates the drum 1 and the flying slider 2A. The minimum clearance, 4 is a spring stem, 5 is a spring, and 6 is a support rod for supporting the flying slider 2A. In this case, the flying slider 2A is constructed so as to fly by a predetermined spacing amount by the floating force due to the rotation of the magnetic drum 1 and the load of the spring 5, and the slider 2A extends along the support rod 6 in the direction perpendicular to the paper surface. Is to be surveyed. Although not shown in FIG. 3, a magnetic head to be described later is installed at the minimum clearance position 3 of the flying slider 2A.

FIG. 4 is a principle explanatory view showing an example of the flying slider. As shown in FIG. 4, this flying slider 2A has a double-barreled slider portion 2 in which two side rails 7 are formed in order to generate a positive floating force on the surface of the magnetic drum 1 (see FIG. 3). When provided with a magnetic head 9 comprising a plurality of horizontal thin-film magnetic f head 8 ₁ ~8n mounted in the central portion between the side rail 7 of the slider portion 2. Then, when the length of the magnetic head 9 and L _0, and the distance from the outlet end of the fluid of the magnetic head 9 of the minimum gap position 11 with its head portion 9 and the magnetic drum and L _01, L ₀₁ In the region of / L ₀ > 0.5, the levitation force of the head portion 9 is zero or close to zero.

In this case, the horizontal thin film magnetic heads 8 _{1 to} 8 n have a basic shape as shown in FIG. 5, for example, a pair of exciting coils 23 and 24 by a thin film process on a magnetic substrate to be the lower core 21. An upper core 22 is formed so as to cover a part of these coils, and a magnetic gap 25 is formed in the central portion of the upper core 22 to have a planar structure.

Further, between the side rail 7 of the slider portion 2 and the magnetic head portion 9, there is formed a groove 10 having a depth such that the levitation force can be ignored, and the chain line indicated by reference numeral 11 in FIG. The minimum clearance position with the drum 1 is shown, and the reference numeral 16 shows the air flow direction. In the case of a magnetic head, the gap positions of the thin film magnetic heads 8 _{1 to} 8 n are aligned with the minimum clearance position 11 in order to improve electromagnetic conversion efficiency. In FIG. 4, reference numeral L ₁ denotes the distance from the fluid outflow end of the side rail at the minimum clearance position 11 of the side rail 7, and L denotes the length of the side rail 7.

In the slider having such a structure, a positive flying force is exerted in a region from the minimum clearance position 11 of the head surface 9 to the inflow end of the head, and conversely, from the minimum clearance position 11 of the head surface 9 to the outflow end. The area has a negative levitation force. Then, the effective flying force with respect to the head surface 9 is the sum thereof. Therefore, by adjusting L ₀₁ / L ₀ , the levitation force of the head surface can be effectively set to zero or a state close to zero. Therefore, it becomes as a floating force of the head surface 9 sandwiched side rail 7 having a thin film magnetic f head 8 ₁ ~8n small enough effectively negligible compared to the flying force of the side rails, thin The magnetic head can be easily multi-channeled, damage to the magnetic drum and the head can be reduced, and the flying slider can be stably levitated without reducing the restoring force of the tilt of the slider.

[0013]

[Problems to be solved by the device]

However, in such a thin film head slider, since the thin-film head chip 9 is surface-mounted on the air bearing surface of the slider part 2, the air bearing surface of each terminal of the coil for exciting the magnetic core of the thin film head 8 ₁ ~8n If it is pulled out from the outside, there is a risk that the lead wiring will come into contact with the medium drum.

In view of the above points, the present invention has been made to solve such a problem, and its purpose is to externally connect the exciting coil terminal of the thin film head chip mounted on the slider body to the outside. It is an object of the present invention to provide a thin film head slider which prevents the lead wiring from coming into contact with the medium drum when it is pulled out.

[0015]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a thin film head slider for flying a thin film head by rotation of a media drum, wherein at least two side rails are provided to generate a positive levitation force on a surface with respect to the media drum. It consists of a slider part formed and a thin-film head chip mounted between the side rails of this slider part. This thin-film head chip consists of a coil that excites its magnetic core. Each via hole is to be pulled out to the outside, connecting terminals are formed on the peripheral surfaces of these via holes, and the lead wires are connected to these connecting terminals.

[0016]

[Action]

 Therefore, in the present invention, each terminal for the exciting coil of the thin film head chip mounted on the slider portion can be taken out from the side opposite to the air bearing surface of the medium drum.

[0017]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. 1A and 1B show an embodiment of a thin film head slider according to the present invention. FIG. 1A is a schematic perspective view thereof, FIG. 1B is a partial side view thereof, and FIG. 1C is a pair of wirings. FIG. 3 is a pattern diagram of a connection terminal portion for use in the above. FIG. 2 is an enlarged plan view of the thin film head chip of FIG. As shown in FIGS. 1 and 2, the thin film head slider of this embodiment has a double-sided rail having at least two side rails 7 for generating a positive levitation force on the surface with respect to the magnetic drum 1 (see FIG. 3). The body type slider portion 2 and the thin film head chip 9a mounted on the center portion between the side rails 7 of the slider portion 2 are provided.

[0018] Then, the thin film head chip 9a is essentially made of a plurality of horizontal thin film head 8 ₁ ~8n having the same planar structure as FIG. 5 described above on the magnetic them thin film heads 8 ₁ ~8n internal terminals of each coil for exciting the core is drawn out to the outside of the air bearing surface 15 that faces surface via a pair of via holes 12 ₁ ~12n. Furthermore, on the peripheral surfaces of these via holes 12 _{1 to} 12 n, wiring connection terminals (lands) 13 _{1 to} 13 n (not shown) are provided corresponding to the respective exciting coils in the thin film heads 8 ₁ to 8 n. Are formed, and by connecting the lead wires 14 to these connection terminals 13 ₁ to 13 n, the exciting coil terminals of the respective thin film heads 8 _{1 to} 8 n are taken out.

In this case, the slider portion 2 is made of a non-magnetic material, and a groove 10 having a depth such that the levitation force can be ignored is formed between the side rail 7 and the thin film head chip 9a. Further, the thin film head chip 9a on the slider portion 2 is placed with its end surface protruding so that each lead-out wiring 14 can be taken out easily. Further, in the thin film head chip 9a, the gap positions of the thin film heads 8 _{1 to} 8n are aligned with the minimum clearance position 11 with the magnetic drum in order to improve electromagnetic conversion efficiency. In FIG. 1, the same or corresponding parts as those in FIGS. 3 to 5 are designated by the same reference numerals.

As described above, according to the present embodiment, each terminal for the exciting coil of the thin film head chip 9 a mounted on the slider portion 2 can be taken out from the side opposite to the air bearing surface 15 of the magnetic drum. The lead-out wiring 14 does not contact the magnetic drum. Further, since the levitation force of the thin film head chip 9a sandwiched between the side rails 7 having the thin film heads 8 _{1 to} 8n, that is, the head surface 9a can be effectively reduced as compared with the levitation force of the side rail 7, it can be neglected. Even if the thin film head has multiple channels and the width of the thin film head chip 9a having these thin film heads becomes large, the total flying force of the slider is not increased. Therefore, damage to the magnetic drum and the head can be reduced, and the thin film head slider can be stably levitated without lowering the restoring force of the inclination of the slider.

Further, since the thin film head chip 9a is composed of the horizontal thin film heads 8 _{1 to} 8n, the ratio of the gap length to the magnetic path length of the core can be made smaller than that of the normal vertical thin film head, and the miniaturization and processing can be performed. The magnetic efficiency is improved and the recording current and power consumption are reduced in combination with the magnetic properties, and it is suitable for application to a magnetic printing apparatus.

In the above, the case where the present invention is applied to the magnetic printing apparatus has been described, but the present invention is not limited to this apparatus, and is applied to various apparatuses for floating the thin film head by the rotation of the medium drum. It goes without saying that you can do it.

[0023]

[Effect of device]

 As described above, according to the present invention, in the thin film head slider for flying the thin film head by the rotation of the medium drum, each terminal for the exciting coil of the thin film head chip mounted on the slider portion is connected to the medium drum. Since it can be taken out from the side opposite to the air bearing surface, it is possible to prevent those lead wires from coming into contact with the medium drum.

[Brief description of drawings]

1A and 1B are schematic views showing a thin film head slider according to an embodiment of the present invention, in which FIG. 1A is a perspective view thereof, and FIG.
(c) is a pattern diagram of a wiring connection terminal portion.

FIG. 2 is an enlarged plan view of the thin film head chip of FIG.

FIG. 3 is a diagram showing a state where a slider floats due to rotation of a magnetic drum in a magnetic printing apparatus.

FIG. 4 is a principle explanatory view showing an example of a slider.

FIG. 5 is a schematic view illustrating a horizontal thin film head,
(a) is a plan view thereof, and (b) is a sectional side view thereof.

[Explanation of symbols]

1 magnetic drum 2 grooves 12 ₁ ～12N via hole 13 ₁ -13N wiring connecting terminals 14 lead-out wire 15 the air bearing surface of the side rail 8 ₁ ～8N horizontal thin film head 9a thin film head chip 10 slider portion of the slider portion 7 slider

Claims (1)

[Scope of utility model registration request] 1. A thin film head slider for flying a thin film head by rotation of a medium drum, comprising: a slider section having at least two side rails formed to generate a positive floating force on a surface of the medium drum. The thin film head chip is mounted between the side rails of the slider portion, and the thin film head chip has via holes for pulling out the internal terminals of each coil for exciting the magnetic core to the outside of the surface facing the air bearing surface. A thin film head slider characterized in that each of them is provided, and a connecting terminal is formed on the peripheral surface of each of the via holes, and a lead wire is connected to the connecting terminal.