Abstract:
A transducer (35) suspension (30) for a drive system has a beam (33) which is bendable in a vertical direction for holding the transducer adjacent to the media, but is torsionally stiff for wuicker access times and reduced noise and errors. This inherently contradictory performance occurs by joining a laterally elongated brace (53) which is torsionally stiff about its elongated dimension across a pair of laterally disposed strips (48, 50) to cause the strips to flex in unison, allowing bending but reducing torsional motion in the suspension about an axis which is substantially perpendicular to the torsionally stiff axis of the brace. The torsionally stiff brace may take the form of a tube having a rectangular (53), triangular (95) or circular (71, 72) cross section, and may be formed of material cut from the suspension to define the hinge strips. The brace may have reduced longitudinal dimensions at the connections to the strips to further filter torsional versus bending vibrations. A plurality of braces (166) joined to hinge portions (160, 161) may also occur in a single suspension for increased effect.
Abstract:
An electromagnetic read/write system includes a contact interface formed by a pole-structure-carrying wear pad (30) and a recording surface (12). The uppermost portion of the recording surface is characterized by a buffed, generally planarized topography. Lower elevations of the recording surface may be texturized or untexturized. Various methods of producing such an interface are described.
Abstract:
A disk drive slider (20) having a planar transducer (46) in virtual contact with a spinning rigid disk (50) during information storage and retrieval has a substrate and a strata formed on a disk-facing side of the substrate including a transducer (46), air-bearing side pads (25, 28) and a trailing central pad (30). The transducer has a pair of pole tips (44) exposed in a trailing portion of the trailing central pad (30). During operation the slider (20) tilts slightly so as to place the pole tips (44) in closer proximity to the disk surface (48) than the trailing end (35) of the slider (20). The disk-contacting pads (25, 28), with the exception of the minute poletip region, are composed of amorphous, diamond-like carbon. The transducer (46) contains a magnetic circuit that is mostly planar but has sloped regions in order to form a highly efficient, magnetically permeable loop.
Abstract:
Flexure/transducer structure (60, 70, 140, 160, 200, 280, 300, 395, 400, 410, 460, 500, 520, 526, 530, 545, 547, 587 a , 588 e , 590) employable in an electromagnetic information storage and retrieval system wherein mechanical load-bearing responsibilities and electrical-current-carrying responsibilities are merged into and shared by common structure. The invention subject matter is useable in systems characterized by contact operation, as well as by quasi-contact and non-contact operations, in relation to the recording surface in an information recording medium (64, 98).
Abstract:
A hard disk drive has a head (22) with a read element (33) adjacent to a write element (30), with the write element extending closer to the disk (25) than the read element so that the write element is close to the disk for writing sharp patterns and the read element is removed from the disk to avoid wear and thermal asperities. The write element is encompassed with diamond-like carbon (DLC) to allow at least occasional dynamic contact with the disk while the read element, which includes a magnetoresistive material, is disposed in a recessed area and may be covered with a thin coating of DLC to avert corrosion. The disk may have a multilayer granular media for low-noise, high-strength perpendicular data storage. Perpendicular data storage may also be provided by keeping the write element in such close proximity to the media that perpendicular write fields predominate, while perpendicular signals from the media are favored by the read element.
Abstract:
An information storage system having a ring head (220) sliding on a rigid magnetic storage disk in such close proximity that the magnetic field felt by the media layer or layers of the disk has a larger perpendicular than longitudinal component so that data is stored in a perpendicular mode. The head to media separation during writing of data to the media is a small fraction of the amagnetic gap (160) separating the poletips (155, 157) of the head. Reading of data may be inductive or may be via a magnetoresistive sensor (222) which is coupled to the magnetically permeable core of the ring head far from the poletips. The media preferably has a high perpendicular anisotropy.