A slider and microactuator elements are disposed on a gimbal portion of a flexure. A first end portion of each of the elements is secured to a first supporting portion. A second end portion is secured to a second supporting portion. A ground-side conductor is provided on the second supporting portion. A limiter member consists mainly of a resin shared with an insulating layer of a conductive circuit portion. The limiter member comprises a grounding junction, a first bridge portion, and a second bridge portion. The grounding junction is secured to the second supporting portion. The first bridge portion extends in a first direction from the grounding junction. The second bridge portion extends in a second direction from the grounding junction.

Disk drive suspension

A head suspension assembly for use in a disk drive having a load and unload ramp, the head suspension assembly including a load beam, a cover having a load and unload tang, a coating sandwiched between the cover and the load beam, and a head lead wire extending through the coating. In a preferred embodiment, the coating is a visco-elastic thermoplastic adhesive and the cover is a constraining material; whereby the cover is adhered to the load beam and undesired vibrations of the head suspension assembly are dampened. In a method of fabricating the head suspension assembly, the cover is placed over the load beam after the coating is applied and after the head lead wire is strung over the load beam, and then the cover is adhered to the load beam by heating the coating, preferably by placing a heated platen over the cover. Consequently, the load and unload tang, which is part of the cover, is not an obstacle when routing the head lead wire over the load beam and bonding the wire to a slider, and the head suspension assembly fabrication process can be automated.

Low profile head suspension assembly with load and unload capability

Disclosed is an integrated lead suspension flexure attachment structure for a micro-actuator with a slider/transducer assembly attached thereto, having a plurality of electrical terminals for both the micro-actuator and the transducer. The suspension provides low gimbal stiffness and allows the slider to have correct pitch and roll static attitudes. An attachment platform is provided for mechanically attaching the micro-actuator. Two elongate cantilever compliance members extend from the transducer edge and the opposite edge of the attachment platform. Two lead termination platforms are provided, each at the distal end of one of the compliance members. The lead termination platforms extend laterally to either side of the compliance members. Electrical leads are positioned laterally of each of the lead termination platforms on either side, and loop towards the compliance member to the lead termination platform to reduce stiffness of the leads. The two lead termination platforms each supports the electrical leads at either side of the compliance member and the compliance members allow flex between the attachment platform and the lead terminations for connecting the leads to the micro-actuator.

Integrated lead suspension flexure for attaching a micro-actuator with a transducer slider

Method and apparatus is provided for controlling unwanted flow of slider bonding adhesive from the flexure tongue portion to the flexure outrigger portion including roughening the tongue portion surface opposite the slider, enclosing the locus of slider attachment fully or partially with a trough etched into the tongue portion, and increasing the depth of fluid adhesive at the locus to increase the adhesive mass and improve the bonding at the slider.

Flexure-slider bonding system

An image projection display system is provided which utilizes an off-axis illumination configuration. A beam splitter is configured to direct a first light beam along a first optical path toward reflective imaging devices adapted to direct a second light beam along a second optical path to produce an image to be projected. Polarizing devices are interposed between the beam splitter and each imaging device, with the polarizing devices configured to allow passage of a first polarized component of the light beam while blocking passage of a second polarized component of the light beam. The display system provides a high contrast ratio and degree of brightness which significantly improves the final image quality projected to a display screen.

Off-axis image projection display system

A load beam for a direct access storage device is disclosed as having an integral flexure formed of two generally uniform cross section intersecting beams with one of the beams extending between two projecting arms of the load beam. The flexure is spaced from an attached slider by a frustroconical projection formed on the flexure. The pitch and roll of the slider is limited by forming surfaces on the load beam structure that will engage the slider as the slider either pitches or rolls excessively. Overlying the flexure and the slider and adhesively engaged with the flexure is a damping layer of visco-elastic material which will absorb energy and suppress undesirable vibrations. The damping layer is provided with tabs or extensions that are adhered to the projecting arms of the load beam to enhance the vibration damping function of the layer.

Low profile head suspension assembly

A two axis electromagnetic actuator having balanced crossed coil structures supported by two sets of leaf springs and positioned in dual air gaps for motion in a direction representing the vector sum of the movement in two orthogonal directions.

Two axis electromagnetic actuator

A two axis electromagnetic actuator is designed for moving an optical element in an optical or magneto-optical recorder. The actuator has balanced, crossed, electro-magnetic coil structures supported by two sets of leaf springs and positioned in dual air gaps for motion in a direction which is the vector sum of the movement in two orthogonal directions. In the actuator the motive forces and the masses of the moving elements are centered on the axis of major motion. Also leaf springs, that allow the major motion, have their forces balanced about the axis of major motion.

Two axis electromagnetic actuator with axis balanced suspension

A magnetic head assembly for reading and/or writing a track of magnetic information on a moving magnetic medium and for tunnel erasing adge portions of the track comprises a central data transfer magnetic core including a pair of core portions (20, 22) providing a data transfer gap (30) on an active face (26) of the head assembly with a read/write coil (32) on one of the core portions. An erase core includes a pair of erase core portions (36, 42).extending along and in contact with one of the write core portions, another pair of erase core portions (34, 40) respectively in alignment with the erase core portions (36, 42) and providing therewith erase gaps (38, 44) on the active face of the head assembly that extend transversely of the direction of movement of the magnetic medium on the active face and a bridging core portion (46) between the erase core portions (38, 44) on which an erase coil (48) is disposed. The two erase gaps are in series with each other in a magnetic circuit which shares a segment in common with the magnetic circuit of the data transfer gap at 22, but the two natural flux flows in the common segment are substantially mutually perpenducular.

Read/write and tunnel erase magnetic head assemblies

A phase retardation element, for use in an optical data storage system, which provides a 90° phase difference between two perpendicular polarized components of an incident wave with a single internal reflection from a surface coated with a thin film of dielectric or metal material.

Holger J. Baasch

Papers

Low profile head suspension assembly

Two axis electromagnetic actuator

Two axis electromagnetic actuator with axis balanced suspension

Read/write and tunnel erase magnetic head assemblies

Phase retardation element and prism for use in an optical data storage system