Alps Electric Co., Ltd.

Tdk Corporation

Hirohisa Ishihara

Tomoo Otsuka

Junsei Ueda

Yasuyuki Kondo

Keishi Nakashima

Isao Nakabayashi

Satoshi Morikawa

Shouhei Ueda, Legal Representative

Mihoko Ueda, Legal Representative

Takao Soma

Soichiro Matsuzawa

Tadashi Otagiri

A magnetic head device is provided. A slider of a magnetic head device has a side that faces a recording medium and on which a first positive pressure is exerted on the leading side and a second positive pressure is exerted on the trailing side. In the area between the first positive pressure area and the second positive pressure area, a small second negative pressure is created at the front. A first negative pressure larger than the second negative pressure is created at the rear. A third positive pressure is exerted on both sides of the first negative pressure area. When air density decreases, the small second negative pressure in a middle area and the large first negative pressure at the rear of the second negative pressure area stabilize the pitch angle of the slider and prevent an excessive decrease in the flying distance of a trailing end portion.

Magnetic head device having rear positive pressure surface and rear side positive pressure surface

A magnetic head apparatus including a magnetic head slider having an overall front half region area (S) and a step surface area (S) and a positive-pressure generating surface area (S) both in the front half region, such that the area ratio S/S is about 0.180 to about 0.232 and the area ratio S/Sis about 0.30 to about 0.47. With this arrangement a difference in pitch angles of the magnetic head slider at the moment when it is just levitated and during levitation is large, and a variation of the pitch angle due to a pressure change is small, thereby preventing damage to a magnetic element within the magnetic head slider while achieving a stable levitation attitude of the magnetic head slider.

Magnetic head apparatus having magnetic head slider and magnetic disk apparatus equipped with magnetic head apparatus

The present invention provides a magnetic head slider including rails formed on the medium-facing surface on the magnetic disk side for generating buoyant force so that the slider flies and moves above a magnetic disk to write or read magnetic information. In the magnetic head slider, a first carbon film having corrosion resistance is provided on the surfaces of the rails provided on the medium-facing surface of the slider body through an adhesive layer, protrusions formed by alternately laminating an intermediate film and a second carbon film are provided on the first carbon film, and at least the outermost second carbon film of the second carbon films, which constitute each of the protrusions, has abrasion resistance.

Magnetic head slider having protrusions provided on the medium-facing surface and manufacturing method therefor

A trailing ABS face, which is a surface generating positive pressure, is formed to rise from a surface facing a recording medium, which is a surface generating negative pressure, toward the recording medium and furthermore, a surface facing the element, in which a gap portion of a magnetic element is located, is formed to rise from the trailing ABS face. Thereby, the floating lift of a magnetic head can be reduced while the floating position can be stabilized and furthermore, collision of the magnetic head with a disk surface can be properly avoided.

Magnetic head having raised element and magnetic head apparatus using the same

The present invention provides a magnetic head slider including rails formed on the medium-facing surface on the magnetic disk side for generating buoyant force so that the slider flies and moves above a magnetic disk to write or read magnetic information. In the magnetic head slider, a first carbon film having corrosion resistance is provided on the surface of the rails provided on the medium-facing surface of the slider body through an adhesive layer, protrusions formed by alternately laminating an intermediate film and a second carbon film are provided on the first carbon film, and at least the outermost second carbon film of the second carbon films, which constitute each of the protrusions, has abrasion resistance.

Magnetic head slider having protrusions with high abrasion resistance provided on the medium-facing surface and manufacturing method therefor

Disclosed is a magnetic head in which there is no fear of the surface of the magnetic recording medium being damaged by the acute edge portion of the magnetic head if the magnetic head approaches the magnetic recording medium in an inclined state. According to the present invention, there are provided on the medium opposing surface of the slider main body rail portions for causing the slider main body to fly, wherein, in the slider main body, the upstream side with respect to the rotating direction of the magnetic recording medium is the leading side, the downstream side with respect to the rotating direction being the trailing K side, and wherein there is provided in a corner portion of the medium opposing surface on the trailing side of the slider main body a protrusion which is lower than the sub rail portion and which is closer to the magnetic recording medium than the end portion on the trailing side of the slider main body in the rolling state of the slider main body.

Magnetic head having protrusion on medium opposing surface and magnetic recording apparatus

The use of a Nd-YAG laser or excimer laser enables easy formation of protrusions on a protecting layer and a portion of an opposite surface near the trailing side end thereof and a thin film element. It is thus possible to avoid direct contact between the thin film element and the disk surface, and thus prevent damage to the thin film element and wearing thereof even if a slider and the disk surface repeatedly slide on each other.

Method of producing magnetic head

Thin protective films for protecting a thin films device are formed on ABS (air bearing surfaces) of a slider, and thin films made of the same material as that of the protective films are formed on the surfaces of the protective films. The thickness &dgr; of each of the thin films can be 10 nm or more, and the ratio of the area of the thin films with respect to the air bearing surfaces can be, for example, 80% or less.

Floating type magnetic head with non-magnetic thin film coating pattern to reduce starting friction

The present invention provides a magnetic head including a slider 1 and a thin-film element 3, a magnetic recording/reproducing apparatus including the same, and a method for manufacturing the same. According to the present invention, since a resist layer is formed on the thin-film element 3 prior to a milling process, the thin-film element can be protected from the influence of the milling process, and generation of an element recess can be inhibited. Further, since the slider 1 is preferably formed of a ceramic composition including Al.sub.2 O.sub.3 and TiC, the roughness can be readily adjusted by the milling process. Moreover, when the center line mean roughness of each opposing surface 5 of the slider, said surface opposing the recording medium, is represented by R.sub.ah1 and that of the disk serving as the recording medium is represented by R.sub.ad, the relationship, 6 nm.ltoreq.R.sub.ah1 +R.sub.ad .ltoreq.19 nm is preferably satisfied. Due to this, adsorption between the opposing surface and the surface of the disk can be prevented, and the torque for starting the disk can be lowered.

Growing community of inventors

Niigata-ken, Japan

Hirohisa Ishihara