Magnetic head slider and magnetic disc unit
View Patent ↗A magnetic head slider in which a leading pad is projected in a thicknesswise direction of the slider, in comparison with a trailing pad so as to reduce vibration caused by contact between a flat medium surface of a disc and the slider carrying thereon a magnetic head, to reduce variation in flying height caused by wavy unevenness of the medium surface, and to reduce variation in atmospheric pressure around the slider, thereby it is possible to enhance the recording density and the reliability of the magnetic head slider while reducing the costs thereof. Further, a magnetic disc unit using the above-mentioned magnetic head slider.
1. A magnetic head slider having opposite sides and a leading edge side on which an air stream induced by a magnetic disc flows into the slider, and a trailing edge side on which the air stream flows out from the slider, and comprising a leading pad formed on the leading edge side and serving as an air bearing surface, a trailing pad formed on the trailing edge side, and serving as an air bearing surface, a pair of side rails formed along the opposite sides having rail surfaces, and a recess surface defined between the leading pad and the trailing pad, wherein the leading pad has a height which is measured from the recess surface and which is greater than that of the trailing pad, the leading pad including a first surface and a second surface which is formed on a leading edge side of the first surface and which is lower than the first surface, the second surface being higher than the rail surfaces of the side rails.
2. A magnetic head slider as set forth in claim 1 , wherein the first surface is projected from a recess surface, and the trailing pad includes a third surface projected from the recess surface and a fourth surface which is formed on a leading edge side of the third surface and which is lower than the third surface, the second surface of the leading pad being higher than the third surface of the trailing pad.
3. A magnetic head slider as set forth in claim 2 , wherein the third surface is higher than the rail surfaces of the side rails.
4. A magnetic head slider as set forth in claim 2 , wherein the second surface is higher than the rail surfaces of the side rails, and the third surface is higher than the rail surfaces while the fourth surface is flush with the rail surfaces of the side rails.
5. A magnetic head slider as set forth in claim 2 , wherein the height of the third surface of the trailing pad measured from the recess surface is set to be not greater than 4 μm.