Patent ID: 7940497
Filing Date: 2011-05-10
Classification: G11B

Abstract:
1. A magnetic head device comprising: a slider having a facing side that faces a recording medium and a pressing side on which pressing force directed toward the recording medium is exerted; and a magnetic functional unit mounted on a trailing side of the slider and configured to perform a magnetic recording function, a magnetic reproducing function, or both; wherein the facing side of the slider has a front section located on a leading side of the slider, a rear section located on the trailing side, and a middle section between the front section and the rear section; the front section is provided with a front positive-pressure surface; the rear section is provided with a rear positive-pressure surface, a rear negative-pressure surface that is closer to the pressing side than the rear positive-pressure surface is, blocking portions located in front of the rear negative-pressure surface, and rear side positive-pressure surfaces between which a centerline extends from the leading side to the trailing side; the middle section is provided with a central negative-pressure surface that is closer to the pressing side than the front positive-pressure surface is and configured to cause a negative pressure to develop on at least a boundary with the front positive-pressure surface; a depth (SD a direction along the centerline is referred to as a front and rear direction, and a direction orthogonal to the front and rear direction is referred to as a left and right direction, the rear positive-pressure surface comprises a main positive-pressure surface located in a reward position near the trailing side and extending in the left and right direction, a left sub positive-pressure surface extending in the front and rear direction continuously from the left end of the main positive-pressure surface toward the middle section, a right sub positive-pressure surface extending in the front and rear direction continuously from the right end of the main positive-pressure surface toward the middle section, and a central sub positive-pressure surface extending in the front and rear direction continuously from the middle in the left and right direction of the main positive-pressure surface toward the middle section, raised guiding portions extend in the front and rear direction toward the middle section continuously from each of the left sub positive-pressure surface and the right sub positive-pressure surface, and each of the raised guiding portions is connected to each of the blocking portions, and an air guiding channel continuously connected to the central negative-pressure surface is provided between the raised guiding portions, a left step surface is formed between the left sub positive-pressure surface and the central sub positive-pressure surface and a right step surface is formed between the right sub positive-pressure surface and the central sub positive-pressure surface, and the left and right step surfaces are formed lower from the rear positive-pressure surface in a depth smaller than either of the depth (SD a spreading left-to-right width (W the front section is provided with a front step surface in front of the front positive-pressure surface, and a depth from the rear positive-pressure surface to the rear negative-pressure surface is larger than a depth from the front positive-pressure surface to the front step surface.