Abstract: Perpendicular magnetic media are described for use in magnetic recording and data storage. For example, a magnetic medium may include a substrate, an amorphous underlayer formed over the substrate, a seed layer formed over the amorphous underlayer, and a multi-layered magnetic stack formed over the seed layer. In this manner, high perpendicular magnetic anisotropy can be achieved and storage densities can be increased.

Abstract: A magnetic recording apparatus comprises a magnetic field impression unit, a current supplying unit and a controlling unit t. The magnetic field impression unit impresses a magnetic field to a magnetic recording medium. The current supplying unit supplies a current to the magnetic recording medium. The controlling unit makes the current supplying unit supply the current to the magnetic recording medium while making the magnetic field impression unit impress the magnetic field to at least a unit of a magnetic recording unit of the magnetic recording medium. Thus, a information is recorded magnetically by making a direction of a magnetization of the magnetic recording unit of the magnetic recording medium in a predetermined direction.

Abstract: A guarantee processing method guarantees the data of an adjacent track in the case of a write fault, and guarantees the data only when there is the possibility of an off track write at a write fault. Even if a write fault is detected or if an offset read retry succeeded, a rewrite for guaranteeing an adjacent track is not executed immediately, but the possibility of an off track write is judged by the movement of the head, and if there is the possibility of an off track write, the sector which became difficult to be read due to the off track write is detected, and only that sector is rewritten.

Abstract: There is provided a high-availability duplexing or multiplexing information recorder where a process is not interrupted by a trouble of a drive or a medium. The information recorder is directed to write data instructed to be written from a host system in recording media of at least two drives. The recorder is configured to: detect an abnormality of each drive itself and an abnormality of the recording medium of each drive; cancel the writing of the data in the recording medium of the drive where an abnormality is detected or the drive having the recording medium where an abnormality is detected; and continue the writing of the data in the recording medium of the following drive without notifying any abnormality to the host system, as long as there is at least one drive where any abnormality is not detected and which has the recording medium where any abnormality is not detected.

Abstract: A thinfilm magnetic head for tape drives that enables onsite, real time temperature monitoring of the head-media interface. The head includes a media interface contacting a data bearing surface of the tape. A thinfilm, read-write element and a thinfilm sensor of a thermosensor are positioned on the head-media interface. The thermosensor generates a signal based on the temperature of the media interface. The media interface includes an active island and an optional inactive island positioned transverse to the tape travel path with the read-write element in the active island. The sensor may be placed on the inactive island or on the active island adjacent the read-write element. In one embodiment, a plurality of read-write elements and thermosensors are provided and sensors of the thermosensors are positioned on the inactive island and/or the active island among or between the read-write elements or adjacent an end element.

Abstract: A hard disk drive that has a locking actuator which can engage and lock a disk and spindle motor of the drive. The locking actuator may have a shape memory alloy element that causes a plunger to engage and lock a disk(s) when power is terminated to the drive. In the locked position the actuator can minimize the impact of shock and vibration loads on the spindle motor, particularly when the hard disk drive is shipped and transported. The shape memory alloy element is heated when the hard disk drive receives power. The heated shape memory alloy element disengages the plunger from the disk and allows for operation of the disk drive.

Abstract: A method for writing servo information in a hard disk drive. The method includes initially writing a seed servo pattern with a servo writer and then self writing the rest of the servo patterns with the heads of the drive. Each head should preferably have a write element that is sufficiently offset from a read element toward an inner diameter of the disks. This will insure that the heads will not write over an existing servo pattern.

Abstract: A method of writing servo patterns on a disc in an external servo track writer (“STW”) includes enclosing the disc and an actuator arm within an internal enclosure, while additionally enclosing the internal enclosure and the remainder of the STW by an outer cover. The internal enclosure is filled with a low-density gas prior to writing the servo patterns on the disc. Gas overflowing from the internal enclosure is contained by the outer cover which further retains the low-density gas once the internal enclosure is opened at the conclusion of the servo writing process. The low-density gas is then purged from the STW for recycling before the outer cover is opened and the disc is removed. The internal enclosure may comprise two separate components moveable between an open and closed position to allow for loading and removal of the disc from a spindle motor of the STW.

Abstract: A magnetic disk apparatus includes a following compensator for measuring a frequency characteristic of an under-control object to stabilize a vibration mode of the under-control object with phase condition and a resonance filter having a resonance point in the vicinity of a frequency at which positioning accuracy is to be enhanced, being coupled in parallel to the under-control object. Polarity of mode constant of the resonance filter is so determined as to stabilize a vibration mode brought about by the resonance filter on the basis of a relation between the frequency stabilized by a control system and the phase−180° crossover frequency. Positioning accuracy at a specific frequency can be enhanced without involving unstability in the control system even in a frequency range where sensitivity function of the control system is higher than 0 dB inclusive.

Abstract: The present invention is directed towards a disk drive that comprises at least one head carrying assembly that includes an actuator arm, a suspension attached to the actuator arm, and a head carried by the suspension. Each head is positioned upstream of its actuator arm. This reversed-flow orientation reduces head vibration and disk power requirements.

Abstract: An apparatus for securing the internal rotational components of a disk drive utilizes an annular clamp retention device. The clamp retention device has a rigid, metallic, main ring body from which protrudes a plurality of compliant tabs having a generally L-shaped cross-section. The compliant tabs extend radially inward from the body to form an inner circular array of the tabs. In addition, a plurality of rigid planar flanges, which are larger than the compliant tabs, extend radially outward from the body. The compliant tabs are designed to engage the hub and cartridge of the disk drive rotational components at the upper end of the disk stack.

Abstract: A disk drive device includes a recording medium, a head slider having a head element for recording data on the recording medium and for reading data recorded on the recording medium, a spindle motor for rotating the recording medium, and a clamp for applying a pressing force to the recording medium to fasten the recording medium to the spindle motor. The disk drive device has a feature in which a film body formed from a material which is more pliable than a material forming the clamp is interposed between the clamp and the recording medium. Even if the clamp does not have a high flatness, the film body absorbs irregularities of the clamp. Thus, it is possible to fasten the recording medium with the clamp while apparently keeping flatness.

Abstract: A thin film inductive write head for magnetic recording has a write gap formed as a lamination of alternating layers of a nonmagnetic gap layer and a ferromagnetic spacer layer. There are N gap layers and N−1 spacer layers, with each pole tip of the write head being located adjacent to a gap layer. The spacer layers in the gap structure are formed of a ferromagnetic material with a high saturation moment density (BS) that is close to the BS of the spacer material from which the pole tips are formed. Unlike the pole tips, the spacer layers are not part of a magnetic circuit and are magnetically isolated, i.e., completely surrounded by nonmagnetic gap material. The effect of the spacer layers is to effectively divide the gap into a plurality of smaller gaps. The write head with the laminated gap creates a write bubble that is narrower in the off-track direction and wider in the in-track direction.

Abstract: A disk cartridge includes a substantially box-shaped outer case that has an opening on one end face, and an inner case that is housed in the outer case such that the inner case can be pulled out and has a concave portion for an optical disk to be placed therein. In an end portion on a side of the opening of each of an upper side plate and a lower side plate of the outer case, a substantially V-shaped cutout formed by a substantially circular arc and an inclined substantially straight line is formed. In the inner case, a substantially U-shaped cutout formed by a substantially circular arc and two inclined substantially straight lines is formed. The substantially straight line forming the substantially V-shaped cutout and the two substantially straight lines forming the substantially U-shaped cutout are virtually parallel to each other.

Abstract: A magnetic disk cartridge comprising a magnetic disk medium, a casing for rotatably housing the magnetic disk medium, and dust-removing liners fixed to inner surfaces of the casing that face both sides of the magnetic disk medium. The dust-removing liners are formed from a porous material that has a great number of pores whose size is in a range of 60 to 100 &mgr;m.

Abstract: A flying head slider is disclosed which can fly stably above the surface of a recording medium and thereby prevent deterioration of a reproduction signal output of the head. The flying head slider has a head for recording and reproducing information onto and from a recording medium and has an air bearing portion at an opposing portion thereof which opposes to the recording medium. The flying head slider is acted upon by buoyancy by air bearing caused by dynamic pressure between the air bearing portion and a surface of the recording medium. The flying head slider is disposed with respect to the recording medium such that, within a flying region of the flying head slider in a radial direction of the information recording medium between an inner circumference position and an outer circumference position of the surface of the recording medium, a flying pitch angle equal to or greater than 120 &mgr;rad is formed between the air bearing portion and the surface of the recording medium.

Abstract: A ramp formed of a material made by adding an inorganic filler to a thermoplastic resin or a thermosetting resin.

Abstract: A disc drive includes an actuator assembly mounted on a base. The actuator assembly is able to move a transducer head over a data surface of a disc. The disc drive also includes a voice coil motor that is able to rotate the actuator assembly. The voice coil motor includes a bottom pole adjacent the base, an opposing top pole adjacent the cover and a coil mounted on the actuator assembly between the top and bottom poles. A flexible cable is coupled to the head and has first and second ends and a middle section extending between the first and second ends, wherein the first end is secured to the actuator assembly. The disc drive also includes a flex clamp fastened to the base and securing the second end of the flexible cable to the base. The flex clamp has a body and a clamp arm extending from the body. The clamp arm extends over the bottom pole of the voice coil motor and retains the bottom pole between the clamp arm and the base.

Abstract: A magnetic reading head is provided. The magnetic reading head reads information recorded on a recording medium having a soft underlayer and a magnetic layer stacked on the soft underlayer, and includes a magneto-resistive element and a pair of shield layers. The magneto-resistive element is positioned over the magnetic layer, keeping a predetermined distance G from the soft underlayer. The pair of shield layers are arranged parallel to the magneto-resistive element, keeping predetermined distances from both sides of the magneto-resistive element. Here, the shield layers have widths less than double of the predetermined distance G. In this structure, by properly adjusting the widths of the shield layers, magnetic fields formed by the magnetization of the recording medium under the shield layers do not affect the magnetoresistive element. As a result, sensitivity of the magnetic reading head can be improved.

Abstract: A reproducing head of a thin-film magnetic head incorporates an MR element, a pair of bias field applying layers located to be adjacent to the side portions of the MR element, and a pair of electrode layers that are located on the bias field applying layers and overlap the MR element. The electrode layers each have a first layer that is laid over part of the top surface of the MR element via a protection layer, and a second layer that overlaps the first layer. In the method of manufacturing the reproducing head, after forming the protection layer on an element-to-be film to make the MR element, a first electrode-to-be film to make the first layers is formed continuously without interposing a step of exposing the protection layer to the air.

Abstract: A lead overlay magnetic sensor for use in a disk drive is provided having a protective cap layer disposed between the electrical leads and the sensor. The protective cap layer is preferably formed from ruthenium, rhodium, or other suitable material. The sensors thus formed have low resistance between the electrical leads and the sensor and also have well defined magnetic trackwidths.

Abstract: The invention includes a magnetic field detection sensor. The magnetic field detection sensor includes a first magnetic sensor including a first sense layer and a first reference layer. A second magnetic sensor includes a second sense layer and a second reference layer. The first magnetic sensor is physically oriented relative to the second magnetic sensor so that external magnetic fields detected by the magnetic field detection sensor cause a relative magnetic orientation of the first sense layer to the first reference layer to be opposite of a relative magnetic orientation of the second sense layer to the second reference layer. A differential amplifier can senses the relative magnetic orientations of the first junction sensor and the second junction sensor.

Abstract: A semiconductor slider including an integral spin valve transistor (SVT) having a read width of 250 nm or less disposed on a monolithic semiconductor substrate, useful in magnetic data storage applications. The monolithic slider may also include other magnetic and semiconductor transistor structures and is fabricated in a single process using standard thin-film processing steps. The SVT includes a sensor stack having a top surface and including a first ferromagnetic (FM) layer in contact with and forming a Schottky barrier at the monolithic semiconductor substrate, a FM shield layer disposed over the sensor stack and in electrical contact with the top surface thereof, a SVT emitter terminal coupled to the FM shield, a SVT collector terminal coupled to the substrate and a SVT base terminal coupled to the first FM layer. The sensor stack may include a spin valve (SV) stack or a tunnel valve (TV) stack, for example.

Abstract: A magnetoresistive sensor having two free layers with shape anisotropy induced magnetic alignment is disclosed. The magnetoresistive sensor includes a first ferromagnetic free layer having a first quiescent state magnetization direction. The magnetoresistive sensor also includes a second elongated free layer having a second quiescent state magnetization direction and positioned such that the first quiescent state magnetization direction is generally orthogonal to the second quiescent state magnetization direction. Further, a portion of the second ferromagnetic free layer overlaps a portion of the first ferromagnetic free layer proximal to an air bearing surface to form a v-shape. A nonmagnetic spacer layer is also positioned between the first ferromagnetic free layer and the second ferromagnetic free layer.

Abstract: A transducing head has a magnetoresistive sensor, a first bias element, and a second bias element. The magnetoresistive sensor is positioned between the first and second bias elements, and has a sensor width. The first bias element has a first length and the second bias element has a second length. The direction of the first and second lengths are substantially similar to the direction of the sensor width. The first and second lengths in the range of about one-tenth to about twenty times the sensor width.

Abstract: A starter control device includes an auxiliary switch for controlling an operation of a starter main switch, the auxiliary switch having a cap made from an insulating member. The starter control device also includes a control circuit part disposed on the cap, a terminal disposed on the cap, and a connection metal attachment for connecting the control circuit part and the terminal.

Abstract: An integrated circuit having either or both ESD and noise suppression devices that use the inherent resistance in the substrate as an ESD trigger and/or part of the noise suppression.

Abstract: An early triggered MOSFET ESD protection circuit based on reduction of the trigger voltage is described. A transient negative voltage is generated and applied to a gate of a MOSFET during a positive ESD event. The instant invention improves ESD performance, and is particularly useful for thin gate oxide of 40 Å and less.

Abstract: An over-voltage protection circuit for protecting an integrated circuit includes an external power supply terminal to which a power supply voltage is supplied, a grounding terminal to which a ground voltage is supplied, and an internal power supply terminal for supplying the power supply voltage to the integrated circuit. A voltage dividing unit is connected between the external power supply terminal and the grounding terminal for dividing a voltage supplied from the external power supply terminal, and has a Zener diode and a first resistor connected in series. A signal generating unit is connected between the external power supply terminal and the grounding terminal for outputting the power supply voltage or the ground voltage, and a switching unit is connected between the internal power supply terminal and the signal generating unit for performing a switching operation.

Abstract: Dynamic thresholds for power circuit switch operation are calculated in real-time using instantaneous operating parameter measurements. The dynamic thresholds are self-adapting and are used to provide shutdown criteria independent of switch control systems. A characteristics field containing information related to operation parameters is used to make overload evaluations in real-time. These dynamic overload evaluations allow complete protection against thermal overload for entire power circuits in addition to power components. Reserve load capacity can also be determined based on well known component characteristics, which permits the power circuit to be driven at optimal efficiency. The power circuit output profile can also be modified in response to dynamic overload evaluation, thus preventing overload shutdown or damage to components, while operating at optimal efficiency.

Abstract: A PCB scrap edge removal tool comprising scrap removal jaws formed of two matching opposing pieces of metal having cut-outs in a castellated fashion. The jaws have a gap between them for receiving a PCB work piece to be finished. Metal dowels for PCB positioning span the gap. A PCB is positioned in the gap and rocked back and forth to break off the scrap edge pieces. The cut-outs in the scrap removal jaws correspond to portions of the PCB edge that are not to be removed. These portions move freely in the cut-outs as the PCB is rocked back and forth.

Abstract: A circuit (200) for protection against voltage or current spikes receives an initial clock signal (CI) and transmits at least one resultant clock signal (CN1, CN2, CP1, CP2) to a downstream circuit. This resultant clock signal is inactive if a random voltage or current spike appears upstream. This averts the possibility of disturbing the operation of the downstream circuit. Application to the protection of clock circuits for integrated circuits.

Abstract: A semiconductor circuit system has first, second, and third external terminals electrically separated from each other. The first external terminal is configured to receive a first power supply voltage in a normal operation. A protection circuit section is provided in the circuit system and includes a rectifier to allow a surge current to pass therethrough. The rectifier has a current passage connected between a specific terminal connected to a protection target and the third external terminal. The protection circuit section further includes a first PMOS transistor configured to trigger the rectifier, based on a surge voltage inputted into the second external terminal. The first PMOS transistor has a current passage connected between the second external terminal and a base of the NPN transistor. The first PMOS transistor has a gate connected to the first external terminal.

Abstract: Device for transmission of electromagnetic radiation through a wall.

Abstract: A portal site server system provides services of service systems to user terminals of users via at least one network. The portal site server system includes a user profile registering at least communication methods to the users, a communication priority table registering a priority order of the communication methods, a mechanism for making an inquiry to a specific user by a communication method which has a highest priority and is selected from the communication methods registered in the user profile depending on the communication priority table, when a service request is received from the specific user and an inquiry to the specific user is required, and a mechanism for updating the user profile based on information received from the specific user in response to the inquiry.

Abstract: Capacitors comprising an inert porous shaped body onto which a first electrically conductive layer, a second layer of barium titanate and a further electrically conductive layer have been applied.

Abstract: A housing with paneling elements, at least one of which is embodied as a door panel and can be fixed on the housing in a closed position and an opened position. If threaded receivers, which are oriented toward each other, are positioned on two oppositely located panel elements at least in the connecting area with a vertically adjoining panel element, and fastening elbows are connectible with the bearing receivers in adjustable angular positions by clamping screws having an adjustment knob and can be fixed in place, then the housing can be easily attached to a fastening surface and its angular position can be adjusted.

Abstract: A holder (6), which is suitable in particular for luminaires which do not provide any direct manual access to the capped lighting means, has a slide by means of which the lamp cap and/or the contact pins thereof can be pushed out of the holder or at least released from the holder. In the case of a preferred embodiment, the holder housing (8) is designed in two parts, the housing part (9) being designed as the slide.

Abstract: In one aspect of the invention, a network server is provided. The server includes a computer configured to host a web site for sharing images posted to the web site across a network. The server also includes a housing having a first cover, a second cover, and a spine. The spine connects the first and second covers in the manner of a book. The computer is mounted to the housing, for example at one or more surfaces of the covers or the spine, to provide the visual appearance of a book for the server.

Abstract: The present invention includes a housing for carrying the components or circuits. The housing include a first part that is located in the slot when the present invention is inserted into the computer. The second part of the housing extends outside the slot of the computer. A wireless transmission module is set in the second part for transmitting the signal. A SIM is set also in the second part of the housing. A hot swapping protector is located in the first part of the housing and electrically coupled to the SIM for protection. A card reader is connected to the hot swapping protector and a power control module is connected to the card reader, the hot swapping protector for providing the power.

Abstract: A method and apparatus for cooling includes a chassis and a midplane mounted in the chassis. More than one airflow opening is formed in the midplane. A temperature measuring sensor is mounted [adjacent each opening] in the chassis. More than one heat generating module is positioned on a first side of the midplane and more than one adjustable airflow generating component is positioned on a second side of the midplane to generate an airflow through each opening. A controller is coupled to determine an output for adjusting each airflow generating component in response to the temperature sensed by each sensor.

Abstract: Computing apparatus including a housing that defines a cavity. The computer apparatus further includes within the cavity multiple computing components, such as a processor, memory, and so on, and a fan for generating an airflow to cool these components. There is a first path defining an air inflow for the fan, and a second path defining an air outflow for the fan. One of these paths is externally ducted to a vent facility in a first wall of the housing, and the other one of the paths communicates with the cavity adjacent the first wall. Typically, the externally ducted airflow is arranged to cool a CPU, which is the component most vulnerable to over-heating.

Abstract: A circulation path, a radiator and a reserve tank which can remove air bubbles from the fluid passageway, constitute parts of a closed circulation path, and are formed by joining a flow path wall-forming radiation board on which curved surfaces as flow path walls are formed, with a flat plate-like flow path wall-forming radiation board as another curved surface by welding or the like. Therefore, the efficiency of heat exchange of a cooling apparatus for electronic equipment can be improved, removal of air bubbles from the flow passageway and reduction in size, weight and thickness is made possible without causing air lock.

Abstract: A cooling assembly for dissipating heat produced in a heat generating component of an electronic system includes a shroud assembly. The cooling assembly also includes a heat dissipating device removably housed within the shroud assembly and a fan assembly removably housed within the shroud assembly. The shroud assembly further includes a plurality of mounting assemblies slidably attached to the shroud assembly and configured to removably secure the cooling assembly in thermal connection to the heat generating component.

Abstract: Disclosed is an improved fan module for use in an electronic enclosure. The fans are arranged in a hybrid serial parallel configuration which provides both redundant flow of successive fans and the ability to flow around a failed or locked fan to continue airflow. The fans are further arranged in an angled configuration to provide airflow through the enclosure without the need for baffles or other thermodynamic steering devices.

Abstract: A pump for circulating a coolant has a housing thereof in direct thermal connection with an electronic component. This provides both the improvement of cooling efficiency of a cooling device and the realization of a compact, slim design of the device.

Abstract: A heat sink clip assembly includes a clip (10) and a frame (50). The clip is formed from a single strand of resilient metallic material that is bent and coiled to become generally U-shaped. The clip includes a retaining bar (11), and two confining poles (12) extending perpendicularly from opposite ends of the retaining bar. Each confining pole comprises a first resilient section (14) near a distal end of the confining pole, a fastener (18) at the distal end of the confining pole, and a second resilient section (16) adjacent the retaining bar. Each first resilient section has a pressed head (142) with a handle (30) attached thereon. The frame comprises a plurality of locking fingers (52) extending perpendicularly from a flat rectangular board. Each locking finger has a hook (53, 54) for respectively locking the retaining bar or one of the fasteners of the clip.

Abstract: A data reading module capable of being built in a computer or plugged into a computer standard slot. The module comprises at least one machine seat installed in a standard slot of a computer. A frame is capable of running across the machine seat. A reading unit is placed in the machine seat. The joint of the reading unit and the connector of the frame are electrically connected; a reading unit is installed in the frame. A front side of the reading unit has a plurality of slots for being inserted by memory cards of various forms. Thereby, the data in the memory card can be read; then the read data is sent to a computer through the joint and the connector. . The data in the computer is read out and then is written to the memory card through the connector and the joint; thereby, data can be transferred bidirectionally.

Abstract: A pluggable transceiver module comprising a housing having a first side and a face perpendicular to the first side, and a tab extending beyond the surface of the first side, and the tab sized to mate with a slot in a receptacle of a host device for receiving the pluggable transceiver module housing; a member slidably mounted on the first side proximate the tab; a lever rotatably mounted on the housing, whereby rotating the lever causes the member to slide between the tab and the slot on the receptacle and remove the tab from within the slot, thereby releasing the pluggable transceiver module from the receptacle. The lever includes a free end and a rotatably mounted end, the rotatably mounted end including an extension adjacent to the member, such that extending the free end outward causes the extension to drive the member inward.

Abstract: A latch for retaining moving parts on an enclosure service module (ESM) is provided. This latch comprises a retaining groove in the latch that holds a self-clinching standoff fastener attached to the ESM. A return spring is contained within a molded cavity in the latch, and an alignment groove in the latch is placed at one end of the return spring. The alignment groove guides an alignment pin on the ESM into a secure position, and the return spring applies pressure against the pin while the pin is in the alignment groove.