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| Number | Title | Issue Date |
| 5939133 | Method of manufacturing a slider having a carbon overcoat and an electrically conductive adhesive layer A slider of the type for use with a rotatable magnetic disk is disclosed. The slider has two ends and a bottom surface which includes an air bearing surface. An adhesive layer and continuous coating of carbon is located on the air bearing surface. A metho... | 08/17/1999 |
| 5764445 | Exchange biased magnetoresistive transducer A magnetoresistive (MR) transducer is disclosed in which an exchange coupled anisotropy field is provided by an antiferromagnetic NiMn alloy in contact with the MR alloy. Improved exchange coupling is achieved using an MR layer and adjacent NiMn exchange ... | 06/09/1998 |
| 5748416 | Magnetoresistive playback head An SAL-type magnetoresistive playback head that is highly sensitive and that limits Barkhausen noise is provided by optimizing the magnetic properties of the permanent magnet film. On top of a lower insulating layer are stacked a soft magnetic bias film (... | 05/05/1998 |
| 5715597 | Method for manufacturing thin film magnetic head An improved thin film magnetic recording head includes a pole tip assembly which has a precisely formed physical geometry. The physical geometry of the pole tip assembly minimizes deleterious effects due to undershoots, while the method of manufacturing t... | 02/10/1998 |
| 5682669 | Method of making a magnetic head gimbal suspension assembly with double dimple A head-gimbal assembly for suspending a magnetic head over a spinning disk in a magnetic disk drive having head suspension positioning apparatus includes a base plate fastenable to the positioning apparatus in the magnetic disk drive. a load beam coupled ... | 11/04/1997 |
| 5675461 | Thin film magnetic recording head for minimizing undershoots An improved thin film magnetic recording head includes a pole tip assembly which has a precisely formed physical geometry. The physical geometry of the pole tip assembly minimizes deleterious effects due roundershoots, while the method of manufacturing th... | 10/07/1997 |
| 5654850 | Carbon overcoat with electrically conductive adhesive layer for magnetic head sliders A slider of the type for use with a rotatable magnetic disk is disclosed. The slider has two ends and a bottom surface which includes an air bearing surface. An adhesive layer and continuous coating of carbon is located on the air bearing surface. A metho... | 08/05/1997 |
| 5604651 | Read head with 4-point magnetoresistive sensing A read head assembly senses data recorded on tracks of a moving magnetic media. The read head includes a magnetoresistive sensor element for sensing data, and a circuit connected to the sensor element. The circuit is used to electrically activate the sens... | 02/18/1997 |
| 5479696 | Method of making combination read/write magnetic head There is provided a method for producing erase bands of varying width between tracks of information on a recording medium. In accordance with the method, a magnetic head having a write gap and trailing pole with non-parallel portions is produced. In the p... | 01/02/1996 |
| 5452166 | Thin film magnetic recording head for minimizing undershoots and a method for manufacturing the same An improved thin film magnetic recording head includes a pole tip assembly which has a precisely formed physical geometry. The physical geometry of the pole tip assembly minimizes deleterious effects due to undershoots, while the method of manufacturing t... | 09/19/1995 |
| 5452158 | Magnetic head gimbal having two degrees of fredom with localized torsion and bending for respective degrees of freedom A gimbal embodying the present invention couples the magnetic head to the load beam through torsion fingers which twist to permit rotational motion of the head in one degree of freedom (e.g., pitch or roll) and bending arms which bend to permit rotational... | 09/19/1995 |
| 5381288 | Center moment suspension assembly A suspension for a rigid disk drive suspends a magnetic head over a recording disk in a cantilever fashion. The suspension includes a load beam and a spring assembly which are integrally formed together. The spring assembly includes a bonding tab suspende... | 01/10/1995 |
| 5359479 | Magnetic head slider having a magnetic transducing element affixed to a slider body side surface A composite magnetic head slider is shown. The magnetic head slider includes a slider body having a leading edge, a trailing edge and a side surface extending therebetween. The slider body includes an hydrodynamic surface which co-acts with an air cushion... | 10/25/1994 |
| 5349175 | Focus sensing apparatus using electrical AGC to enhance differential focus error signal A focus sensing apparatus for determining the focus of an illuminating beam relative to an optical disk is disclosed herein. In one preferred embodiment, a light source generates a linearly polarized beam which is collimated by a collimating lens. The col... | 09/20/1994 |
| 5336550 | Carbon overcoat for magnetic head sliders A slider of the type for use with a rotatable magnetic disk is disclosed. The slider has two ends and a bottom surface which includes an air bearing surface. An adhesive layer and continuous coating of carbon is located on the air bearing surface. A metho... | 08/09/1994 |
| 5331622 | Compact optical head A compact optical head for reading or writing data on an optical disc is disclosed wherein the optical head comprises an integrated laser diode/photodetector package, a half-cube beamsplitter, and an objective lens. Light emitted from a diode laser is in ... | 07/19/1994 |
| 5315469 | Magnetic recording head which produces variable erase bands The present invention provides a method for producing erase bands of varying width between tracks of information on a recording medium. In accordance with the invention, a magnetic head having a write gap and trailing pole with non-parallel portions is pr... | 05/24/1994 |
| 5313332 | Flexure suspension for two axis actuator A device for reading information from or writing information to an optical disc memory system using light from a laser diode includes an upper and lower flexure suspension. Both flexure suspensions are mounted on both an objective lens holder and its base... | 05/17/1994 |
| 5296767 | Efficient magnetic motor armatures A permanent magnet motor or actuator, such as the voice coil motors used in disk drives to position read/write heads, with an armature to magnet interface or junction modified to expand the magnetic material into regions of the armature that carry less th... | 03/22/1994 |
| 5270888 | Composite slider head with reduced readback oscillation The readback oscillations from a ceramic-ferrite composite head are substantially reduced by applying a dampening material, such as an epoxy coating, to the surface of the slider body--preferably to one or both side edges or to the trailing edge of the sl... | 12/14/1993 |
| 5265079 | Seek actuator for optical recording The present invention is an apparatus for optical reading or recording information on an optical information medium, wherein as a result of the relative position of the components of the apparatus and the magnitude and application points of the forces exe... | 11/23/1993 |
| 5255139 | Ferrite capped Winchester-style slider An improved slider and magnetic cap assembly which reduces flux loss which retards sensitivity in writing and reading in a magnetic head system. The slider incorporates a body, a partial core, a coil and a cap. The cap is mounted on the upper surface of t... | 10/19/1993 |
| 5245174 | Focus sensing apparatus utilizing a reflecting surface having variable reflectivity An apparatus for evaluation of radiation beam geometry that finds application in determining the focus of an illuminating beam relative to an optical disk is disclosed herein. In one preferred embodiment, a light source generates a linearly polarized beam... | 09/14/1993 |
| 5210929 | Method of making a ferrite capped Winchester-style slider An improved slider and magnetic cap assembly which reduces flux loss which retards sensitivity in writing and reading in a magnetic head system. The slider incorporates a body, a partial core, a coil and a cap. The cap is mounted on the upper surface of t... | 05/18/1993 |
| 5177640 | Two-axis moving coil actuator A two-axis electromagnetic actuator for positioning an objective lens in an optical recording system is disclosed wherein the objective lens is mounted on a lens holder. The lens holder is positioned within a magnetic field created by two pairs of permane... | 01/05/1993 |
| 5162073 | Textured air bearing surface The present invention discloses texturing of the slider air bearing surfaces of the magnetic heads in disk drives to reduce stiction that retards take-off and displaces critical lubricant in a magnetic head system. One embodiment of the present invention ... | 11/10/1992 |
| 5155633 | Anamorphic achromatic prism for optical disk heads A multi-element, air-spaced prism system for use in a reflective-type optical media device having a light source to provide an incident light beam provides an achromatic, anamorphic prism which corrects for astigmatism and ellipticity in the light beam fr... | 10/13/1992 |
| 5150337 | Method and apparatus for measuring time elapsed between events An apparatus and a method for determining the time difference between electrical events utilizes a sinusoidal signal as a reference from which to determine the elapsed time between events represented as electrical pulses. A sine wave and a cosine wave are... | 09/22/1992 |
| 5136558 | Two axis electromagnetic actuator An optical disc player/recorder incorporates a laser, and an electromagnetically driven objective lens. The objective lens is mounted to a lensholder which is movable with respect to a base. A single pair of permanent magnets are mounted to the lensholder... | 08/04/1992 |
| 5124865 | Microminimonolithic magnetic head slider having vertically extending slots to reduce flux leakage losses A magnetic head slider suspension assembly for loading a head slider having air bearing surface onto the surface of a magnetic rotating disc is shown. The magnetic head slider suspension assembly includes an elongated slider arm adapted to be attached to ... | 06/23/1992 |
| 5109147 | Soldering tip for magnetic wire hookup A small solder tip, which advantageously allows for the rapid production of reliable solder joints without the addition of extra solder, flux or striping the insulation on the wire. The solder tip is preferably formed of tungsten carbide and is used in co... | 04/28/1992 |
| 5107382 | Head core slider having an air bearing surface of a particular configuration A head core slider for a rigid magnetic disk drive, including a slider body, a track portion, a yoke portion and a narrow stepped portion. The slider body has two spaced-apart parallel air bearing portions, and the track portion is formed integrally with ... | 04/21/1992 |
| 5107385 | Read head assembly for multiple-width tracks A read head assembly senses information recorded on magnetic media from tracks having different widths. The read head comprises a magnetoresistive strip which is positioned normal to the direction of movement of the magnetic media. In a preferred embodime... | 04/21/1992 |
| 5086360 | Constant flying height slider The surface of a slider for a magnetic recording head, a burnishing head, or a glide head includes a pair of rails that, in operation, face the magnetic recording medium to form air bearing surfaces. These air bearing surfaces have slots cut into them at ... | 02/04/1992 |
| 5081553 | Combination of elongated load arm and microminimonolithic head slider A magnetic head slider suspension assembly for loading a head slider having air bearing surface onto the surface of a magnetic rotating disc is shown. The magnetic head slider suspension assembly includes an elongated slider arm adapted to be attached to ... | 01/14/1992 |
| 5079831 | Method of making a dual stripe magnetic head The present invention is a method for constructing dual stripe magnetoresistive read heads by depositing each stripe on a separate substrate and then bringing the stripes together in the assembly process. The method of the present invention first forms tw... | 01/14/1992 |
| 5079657 | Textured air bearing surface The present invention discloses texturing of the slider air bearing surfaces of the magnetic heads in disk drives to reduce stiction that retards take-off and displaces critical lubricant in a magnetic head system. One embodiment of the present invention ... | 01/07/1992 |
| 5057953 | Head slider suspension assembly load beam having a fundamental mode vibration characteristic in the range of about 2000 hertz to about 4000 hertz A load beam adapted for use in a head slider suspension assembly is shown. The load beam has a generally rectangular shape and includes a member for defining a support arm end and a head/slider loading end. The load beam has a torsional vibration mode cha... | 10/15/1991 |
| 5020213 | Method of producing a head core slider Method for producing a head core slider for a rigid magnetic disk drive, including a ferrite slider body having a pair of air bearing portions which have a predetermined height and are spaced apart from each other in a transverse direction perpendicular t... | 06/04/1991 |
| 5012572 | Method for producing a head core slider A head core slider for a rigid magnetic disk drive, and a method of producing the same. The core slider includes a slider body, a track portion, a yoke portion and a narrow stepped portion. The slider body has two spaced-apart parallel air bearing portion... | 05/07/1991 |
