Abstract:
A simple method of manufacturing a magnetic head having a head face and including a planar magnetic coil (7) which extends parallel to the head face. According to the method, the magnetic coil is formed at a first side of a first substrate (1). Thereafter, the first substrate provided with the magnetic coil is adhered with its first side to a side of a second substrate (9), whereafter material of the first substrate is removed from a second side of the first substrate, the second side being turned away from the first side, in order to form the head face, in such a manner that the magnetic coil is situated near to the head face.
Abstract:
A piezoelectric actuator is disclosed including an annular piezoelectric element and a base. There is a gap along the radial direction of the annular piezoelectric element. One of the two ends, i.e., the fixed end of the said annular element, is connected to the base, while the other end is free. The base is made of piezoelectric materials. Furthermore, the annular element is divided into two or more annular parts along the direction of its circumference by the electrode patterns applied on its two opposite surface and/or its polarization directions. When driving voltages are applied, the actuator can generate roughly a rotary motion around the center of the annular piezoelectric element. The annular rotary actuator could be either a single plate or with multilayer structure. The present invention further relates to a dual stage head positioning actuator system of a hard disk drive with a plurality of disks and a plurality of vertically aligned head sliders mounted on distal ends of a plurality of suspensions via the annular piezoelectric actuators.
Abstract:
The present invention is embodied in an air bearing slider (10). The slider contains a magnetic head (20) for writing and reading data to and from the magnetic medium of a hard disk. The slider is attached to an actuator arm which reciprocates over the disk surface to position the slider over the surface of the disk. When placed in the airflow existing just above the surface of a rotating disk the slider flies above the disk. The slider which has a leading edge (32), a trailing edge (34) and two sides defined between the leading and trailing edges comprises a pair of leading pads (40) positioned near the leading edge, a channel defined between the leading pads, a side pad positioned adjacent to each of the sides respectively, a center pad positioned near the trailing edge and a cavity disposed between the pads. With the side pads being separate from the leading pads as well as the inclusion of the channel providing a reduction in stiction. Further, the present invention's configuration of elements provides a slider with a nearly constant flying height over the entire disk surface, even during changes in airflow velocity, skew angles and loading. Also, the slider possess high pitch and roll stiffness, which contributes to its ability to maintain a near constant flying height.
Abstract:
The present invention is embodied in an air bearing slider (10). The slider contains a magnetic head (20) for writing and reading data to and from the magnetic medium of a hard disk. The slider is attached to an actuator arm which reciprocates over the disk surface to position the slider over the surface of the disk. When placed in the airflow existing just above the surface of a rotating disk the slider flies above the disk. The slider which has a leading edge (32), a trailing edge (34) and two sides defined between the leading and trailing edges comprises a pair of leading pads (40) positioned near the leading edge, a channel defined between the leading pads, a side pad positioned adjacent to each of the sides respectively, a center pad positioned near the trailing edge and a cavity disposed between the pads. With the side pads being separate from the leading pads as well as the inclusion of the channel providing a reduction in stiction. Further, the present invention's configuration of elements provides a slider with a nearly constant flying height over the entire disk surface, even during changes in airflow velocity, skew angles and loading. Also, the slider possess high pitch and roll stiffness, which contributes to its ability to maintain a near constant flying height.
Abstract:
A magnetic recording and reproducing device comprises a magnetic record medium and a magnetic head including a surface modified chemically with hydrocarbon opposed to the magnetic record medium. The magnetic record medium includes nonmagnetic support having a principal face coated with at least magnetic metal covered with a layer of fluoric lubricant.
Abstract:
A card type magnetic recording device (1), wherein a head arm (14) is of a flat platy swing arm type, a guide arm (27) projected to a side opposite to a disk (2) is provided on the head arm (14), a clearance is provided between the head arm (14) and a load lamp (15), and a projected end (29) of the guide arm (27) remains on the load lamp (15) at a position where the tip part of the head arm (14), to which a head (26) is installed, is disengaged from the load lamp (15).
Abstract:
An improved slider design with stiction reduction pads (71, 73) is presented along with a method of making the same. In one embodiment, the bases for the stiction reduction pads (71, 73) are made first during an etching process for the air bearing surfaces, then the stiction reduction pads (71, 73) are made higher so as to prevent unwanted contact between the air bearing surface and the disc. A reduction in meniscal forces that can be caused by a lubricant on the disc may also be obtained. Stiction reduction pads (71) may be placed at the leading edge step (72) of the slider.
Abstract:
An improved slider design is presented including first and second rails, where the rear portions of the rails have an angle greater than 0 DEG . Adjacent to an inside edge of at least one of the rails, a secondary structure is placed having a height less than that of the rails. Though subambient pressure is present between the first and second rails, the pressure is greater at the secondary structure. In one embodiment, the pressure at the secondary structure is less than one atmosphere over all diameters of the moving recording medium. The slider design of the present invention provides a "stiffer" air bearing, in that the slider resists changes due to gram loading to achieve a narrow distribution in flying height variations as well as roll and pitch variations.
Abstract:
A monolithic optical head (200) facilitates reading and writing optical data on an optical recording medium. The optical head (200) includes a monolithic substrate (210) formed of an optically transparent material. The substrate (210) has a first side (212) and a second flat side (216) opposing the first side (212). The first side (212) includes a central region that has a curved surface (220) to produce a lensing effect, and a peripheral region (201). The second flat side (216) has a central portion opposing the curved surface to couple radiation from and to the curved surface through the substrate. The second flat side (216) also has a peripheral portion opposing the peripheral region of the first side (212).
Abstract:
An improved slider design is presented including first and second rails, where the rear portions of the rails have an angle greater than 0 DEG . Adjacent to an inside edge of at least one of the rails, a secondary structure is placed having a height less than that of the rails. Though subambient pressure is present between the first and second rails, the pressure is greater at the secondary structure. In one embodiment, the pressure at the secondary structure is less than one atmosphere over all diameters of the moving recording medium. The slider design of the present invention provides a "stiffer" air bearing, in that the slider resists changes due to gram loading to achieve a narrow distribution in flying height variations as well as roll and pitch variations.