Tdk Corporation

Alps Electric Co., Ltd.

Yasuyuki Kondo

Junsei Ueda

Hirohisa Ishihara

Jun Tanaka

Keishi Nakashima

Satoshi Morikawa

Mihoko Ueda, Legal Representative

Shouhei Ueda, Legal Representative

A magnetic head device includes a slider with a facing side and a magnetic function part. The facing side of the slider includes a front positive pressure surface located close to a leading end of the slider, a rear positive pressure surface located close to a trailing end of the slider, and a pair of side positive pressure surfaces located closer to the trailing end than the front positive pressure surface and disposed at both sides of a longitudinally extending centerline. Air inlet grooves for introducing air into the side positive pressure surfaces are each disposed in front of each side positive pressure surface. Each air inlet groove extends between the front positive pressure surface and a corresponding side face of the slider and opens toward a leading end face of the slider.

Magnetic head device

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 slider is configured wherein on the trailing side, which is divided in the lateral direction, a first right-side groove portion and a first left-side groove portion are formed, on the leading side of the first right-side groove portion and the first left-side groove portion, which is divided in the lateral direction, a second right-side groove portion and a second left-side groove portion are formed, the bottom face of each groove portion serves as a negative pressure generating face, and the negative pressure (absolute value) generated at a first right-side negative pressure generating face and a first left-side negative pressure generating face is greater than the negative pressure (absolute value) generated at a second right-side negative pressure generating face and a second left-side negative pressure generating face.

Magnetic head slider with optimized flying attitude

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

In a magnetic head, a center pad provided with a magnetic core is formed at the center of an edge at a trailing side of the recording medium opposing surface of a slider body. Two side pads are formed at both ends in the direction of the width at positions closer to a leading side than the center pad is located. A total value of the areas of the recording medium opposing surfaces of the two side pads is set to be larger than a value of the area of the recording medium opposing surface of the center pad. Each of the side pads has, at the leading side, a front stepped surface that is lower than the remaining portion.

Magnetic head having pads provided on the medium-facing surface for minimizing influences of air changes and magnetic recording apparatus provided with the same

A first step portion is formed at a portion at which on an outer end portion of a facing surface of a surface of the slider meets the side panel of the slider. Furthermore, a second step portion is formed at the portion at which the outer end portion of the first step portion meets the side panel of the slider. An edge or the like due to machining occurs at an outer end portion of the second step portion. However, even if the magnetic head is steeply inclined, the outer end portion of the second step portion in which the edge or the like due to machining occurs is barely brought into contact with the recording medium because of the formation of the second step portion.

Growing community of inventors

Niigata-ken, Japan

Yasuyuki Kondo