JPH0467376A - Floating head slider - Google Patents

Abstract

PURPOSE:To realize a floating head slider whose floating quantity in magnetic gaps is small and whose stability of a slider posture is high by providing slots which are arranged on an air inflow-side as against the supporting part of a slider and whose bottoms are in places deeper than the bottom of a pulleyed slot part in a direction perpendicular to an air flow. CONSTITUTION:The slots 9 and 10 which cross floating surfaces 2 and 3 and the pulleyed slot part 6 in the direction perpendicular to the air flow and which have the bottoms in the places deeper than the bottom of the pulleyed slot part 6 are formed on the air inflow-side from the position of the center of gravity of the slider. Consequently, rise force by the air flow A in-flows from the front through the slots 9 and 10 in the right-angled direction of the air flow A is given. The rise force is received in more front than the position of the center of gravity of the slider and therefore a pitch angle where an air inflow end direction is set to be upward can be given. Thus, the floating quantity in the magnetic gaps 7a and 8a arranged at an air outflow end can be reduced. Furthermore, a roll can be reduced by reducing force in a lateral direction operating on the slider.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a floating head slider, and particularly aims to provide a floating head slider with excellent skew stability.

[Prior Art] In recent years, there has been a strong demand for higher storage capacity and smaller device sizes for hard disk drives and other devices equipped with floating magnetic heads used as magnetic storage devices in information processing devices. In response to the increasing density of magnetic heads, floating head sliders of magnetic heads have achieved a low flying height of, for example, about 0°-2 in the range of the magnetic gap.

A conventional magnetic head having a floating head slider will be described with reference to FIG. In the same figure, the floating head slider 1 has an air bearing surface 2° 3 formed long in the direction of the air streamer, and a vertical groove (bleed) in the center sandwiched between both air bearing surfaces 2 and 3. slot portions) 6, and support electromagnetic transducer elements 7.8 at the rear end portions of the air bearing surfaces 2.3, respectively.

The air bearing surfaces (rail surfaces) 2 and 3 serve as one air bearing surface and are an open sea upper surface 3 that faces the radially outer position of the magnetic recording medium.
and an inner thick upper surface 2 which serves as the other air bearing surface and faces a position radially inner of the magnetic recording medium than the open ocean upper surface 3. A ramp angle 4.5, which is an inclined surface, is formed on the air inflow end side of both air bearing surfaces 2 and 3, and the air flowing from the ramp angle 4.5 due to the rotation of the magnetic recording medium is Flying blades are generated on the air bearing surfaces 2 and 3, whereby the magnetic head flies above the magnetic recording medium and accesses the magnetic recording on the medium.

Methods for moving a floating head slider on a magnetic recording medium include a slide arm method with a parallel movement mechanism and a swing arm method with a rotational movement mechanism, but the swing arm method is more and more often used because it is highly economical. There is a tendency to

[1lli to be solved by the invention] In a swing arm type floating head slider,
This is due to the difference in peripheral speed between the inner and outer recording positions of the magnetic recording medium (magnetic disk).

There is a fluctuation in the flying height in which the flying height becomes relatively small on the inner circumferential side of the access position, and furthermore, the inflow angle (skew angle), which is the angle between the designed airflow direction of the slider and the actual airflow direction, occurs. Due to the difference in
There is a problem of instability in attitude due to changes in pitch angle) and inclination perpendicular to the airflow (roll angle).

An increase in the inflow angle generally causes pitching, in which the front end on the air inflow side becomes higher, and rolling, in which the flying height decreases at the side near the air inflow side, in a floating head slider. Of these, pitching is preferable on the one hand because it reduces the flying height of the magnetic gap in the magnetic head, but rolling causes a collision between the magnetic head and the magnetic disk due to fluctuations in the relative position to the magnetic disk. This is not preferable because it may cause fluctuations in the signal magnetic field. This becomes an even more serious problem, especially in the case of a magnetic head with a low flying height and a swing arm type magnetic head, as it impairs the reliability of the magnetic storage device.

The present invention deals with swing arm type floating head sliders, in particular in view of the fact that as the inflow angle increases, the flying height of the slider decreases and the roll angle increases. It is an object of the present invention to provide a floating head slider for a magnetic head that eliminates instability, has good recording and reproducing performance, and has a long life.

A further object of the present invention is to provide a floating head slider that is as simple as possible when machining the floating head slider, thereby reducing the number of man-hours and costs for machining.

[Means for Solving the Problems] An object of the present invention is to provide a bleed slot portion in the air flow direction arranged between two or more upper surfaces in the air flow direction and the air bearing surfaces on the side facing the magnetic recording medium. In the floating head slider, a slot that crosses the air bearing surface and the bleed slot portion in a direction perpendicular to the air flow and has a bottom surface at a position deeper than the bottom surface of the bleed slot portion is located on the air inflow side from the center of gravity of the slider. This is achieved by a floating head slider characterized by being formed.

[Function] The floating head slider of the present invention is given a lifting force by the airflow flowing in from the front through the slot (horizontal groove) perpendicular to the airflow, and receives this lifting force in front of the center of gravity of the slider. For.

It is given a pitch angle with the air inlet end facing upward, which enables a low flying height in the magnetic gap disposed at the air outlet end. On the other hand, at the access position on the inner and outer circumferential sides where a +5keV angle occurs, the airflow that hits the slider side surface from the lateral direction and causes rolling escapes through the slot.

Roll is reduced by reducing the lateral forces acting on the slider.

If a structure is adopted in which the groove depth of the slot is deeper than the depth of the bleed slot part, the airflow flowing into the lateral groove from the bleed slot part will also apply a lifting force to the bottom surface of the lateral groove, which will further increase the lifting force. Can be made larger.

[Embodiment] A swing arm type floating head slider according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a magnetic head equipped with a floating head slider of this embodiment. The floating head slider 1 has a rail surface 2.3 that serves as a long flying surface in the airflow direction, and a groove depth from the floating surface between the rail surfaces 2 and 3 is, for example, 50 mm.
A central bleed slot portion (vertical groove) 6 is arranged. The rail surface 2.3 has ramp angles 4.5 each forming an inclined surface at its front end, and magnetic gaps 7g and 8a of the electromagnetic transducers 7 and 8 are arranged at its rear end.

The electromagnetic transducers 7 and 8 are the rear end surface 1 of the floating head slider 1.
A is constructed using the thin film method.

The slots (transverse grooves) 9,10 according to the invention are arranged perpendicular to the air stream. The slot 9.10 has a bottom surface 9b parallel to the rail surface 2.3 and the bottom surface of the bleed slot portion 6.
, 10b and side surfaces 9J1.10m perpendicular to these, the groove bottom surface 9b of the horizontal groove.

a groove side surface 9a facing the air flow with an inclination such that the fob becomes slightly deeper from the rail surface 2.3 on the air inflow side;
It is also possible to tilt the lea, in which case the lifting force acting on the slot can be increased. Generally, it is sufficient that the depth of the slot is equal to or greater than the bottom of the bleed slot portion.

FIG. 2 shows a side view of the flying attitude of the magnetic head having the floating head slider of the above embodiment above the magnetic disk 20. As shown in FIG.

The slider 1 is point-supported by a nine-rotary arm 11 via a central ball-shaped support member 12 so as to be tiltable in all directions, and between the magnetic disk 20, the air bearing surface 2.3, and the bleed slot portion 6. Air flow A that flows in and forms a single layer flow
The receivers are fixed in slots 9 and 10, and slots 9.1
A force that becomes a rising force at 0 is received from this air flow A.

Therefore, the airflow imparts to the slider 1 a pitch angle such that the air inflow end points further upwards around the ball-shaped support member 12. Therefore, the slider is moved by the magnetic field of the electromagnetic transducer 7.8 arranged at the rear end of the slider. Gap 7a.

The minimum flying height h can be obtained at 8a.

Slot 9. According to lO, even at the inner and outer radial positions of the magnetic disk 20 where a skew angle occurs, the flying posture of the slider becomes stable due to the influence of the airflow from the side.

In the above embodiment, slot 9. Although the floating head slider 1 is shown as having two IOs, the number may be one or more, and both are arranged on the front side of the slider in the air inflow side direction from the ball-shaped support member 12. Further, the number of air bearing surfaces 2.3 is not limited to two, and there may be two or more, and the number of bleed slots 6 is not limited to -, but may be - or more.

Slot 9. lO is at the time of slider manufacture.

A large number of sliders can be fabricated as a single substrate and formed through machining before being cut into individual sliders, in which case many sliders can be easily formed by one machining process. can be done.

Further, since the slots 9 and 10 have their bottom surfaces deeper than the bottom surface of the bleed slot portion 6, it is easy to set the machining end position in the 9 machining.

Since the machining accuracy of the groove depth can be increased, it is possible to increase the yield in mass production of floating head sliders provided with slots having desired characteristics.

[Effects of the Invention] In the present invention, the slider is disposed on the air inflow side with respect to the support portion of the slider supported by the swing arm.

In addition, by providing a slot whose bottom surface is at least as deep as the bottom surface of the bleed slot section in a direction perpendicular to the air flow, a desired pitch angle can be obtained by the rising force of the air flow in the slot, and the inflow angle can be adjusted. It is possible to suppress the occurrence of roll angle at the radially inner access position due to fluctuations in When machining slots, it is easy to set the end position of one machining process.

It has become possible to provide a floating head slider with high groove depth accuracy and high yield in mass production.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a magnetic head including a floating head slider according to an embodiment of the present invention. FIG. 2 is an explanatory diagram of the flying posture of the magnetic head of FIG. 1. FIG. 3 is a perspective view 2 of a magnetic head having a conventional floating head slider. (Explanation of symbols) 1...Floating head slider 2.3...Flying surface (rail surface) 4.5...Ramp angle 6...Vertical groove (bleed slot part) 9.10...Slot (horizontal groove)

Claims (1)

[Scope of Claims] A floating head slider comprising two or more air bearing surfaces in the air flow direction on the side facing the magnetic recording medium and a bleed slot portion in the air flow direction disposed between the air bearing surfaces, A slot is formed on the air inflow side of the center of gravity of the slider, crossing the air bearing surface and the bleed slot portion in a direction perpendicular to the airflow, and having a bottom surface at a depth equal to or deeper than the bottom surface of the bleed slot portion. Floating head slider.