Abstract: A mounting device for a disk drive includes a bracket for receiving the disk drive, and a securing member for mounting the disk drive in the bracket. The bracket includes a pair of side panels for receiving the disk drive therebetween. A cutout is defined in each side panel in a front portion thereof. The securing member includes a handle and a pair of cantilevers extending from opposite ends of the handle. The handle includes a base body and a pair of arms extending from opposite ends of the base body to connect the pair of cantilevers. Each arm includes a first bent portion protruding outwardly from the base body, and a second bent portion protruding inwardly from the first bent portion. A resilient protrusion is formed on the second bent portion for inserting in the cutout.

Abstract: A mounting apparatus for a disk drive includes a tray, a bracket, and a latch member. The tray supports the disk drive. A resiliently deformable hook is formed on the tray. The tray defines two pair of first and second sliding slots. The bracket receives the tray and the disk drive, and defines a positioning opening. Two pair of posts are formed at two opposite ends of the latch member. The posts slide and rotate in the sliding slots. A positioning tab is formed the latch member and engages in the positioning opening to prevent the tray sliding out of the bracket. A blocking tab is formed on the latch member, and engages with the hook to remain engagement between the positioning tab and the positioning opening, and to disengage from the hook when the hook is deformed.

Abstract: A perpendicular write head includes a beveled main pole having corners defining a track width and having a planarized surface and encapsulated on either side thereof and below by an alumina layer, the alumina layer having a polished surface and extending above the main pole on either side thereof as steps.

Abstract: A stepped main pole for a perpendicular write head and methods of making the stepped main pole. The stepped main pole has a main pole tip and a base portion. The main pole tip has a surface that forms part of the ABS and a first thickness. The base portion extends from the main pole tip and has a thickness that varies from the first thickness to a second thickness to form a slanted surface with an apex angle adjacent the main pole tip. By placing the base portion away from the ABS and providing a thickness that increases in a direction away from the ABS, the stepped pole can provide the necessary magnetic flux for writing, while avoiding undesired leakage and fringing. To form embodiments of the stepped main pole of the invention, a fluorine-based reactive ion etch (RIE) may be used. By using an RIE to define the stepped main pole, the apex angle can be better controlled and tight edge control can be achieved.

Abstract: During planarization of wafers, the thickness of a layer of a wafer is measured at a number of locations, after the wafer has been planarized by chemical mechanical polishing. The thickness measurements are used to automatically determine, from a center to edge profile model to which the measurements are fit, a parameter that controls chemical mechanical polishing, called “backside pressure.” Backside pressure is determined in some embodiments by a logic test based on the center-to-edge profile model, coefficient of determination R-square of the model, and current value of backside pressure. Note that a “backside pressure” set point is adjusted only if the fit of the measurements to the model is good, e.g. as indicated by R-square being greater than a predetermined limit. Next, the backside pressure that has been determined from the model is used in planarizing a subsequent wafer.

Abstract: A method for constructing a magnetic write head for use in perpendicular magnetic recording, the write head having a write pole with a trailing shield. After forming a magnetic write pole such as by masking and ion milling a magnetic write pole layer, a thin layer of alumina is deposited. This is followed by the deposition of a thin layer of Rh. Then, a thick layer of alumina is deposited, having a thickness that is preferably at least equal to the height of the write pole layer. A chemical mechanical polish is then performed until a portion of the Rh layer over the top (trailing edge) of the write pole is exposed. A material removal process such as ion milling is then performed to remove the exposed Rh layer exposing the thin alumina layer there beneath. Since the Rh trailing gap layer is electrically conductive it can also serve as a seed layer for electroplating the magnetic trailing shield.

Abstract: A method for manufacturing a write pole for a perpendicular magnetic write head. The method employs a damascene process to construct the write pole with a very accurately controlled track width. The method includes depositing a layer of material that can be readily removed by reactive ion etching. This material can be referred to as a RIEable material. A mask is formed over the RIEable material and a reactive ion etching is performed to form a tapered trench in the RIEAble material. A CMP stop layer can the be deposited, and a write pole plated into the trench. A CMP can then be performed to define the trailing edge of the write pole. Another masking, etching and plating step can be performed to form a trailing, wrap-around magnetic shield.

Abstract: A method for manufacturing a write head having write pole with a tapered upper surface to improve the channeling of magnetic flux to a pole tip of the write pole. The method includes depositing a first layer of magnetic material over a substrate. A CMP stop layer, image transfer layer and mask structure are deposited over the first magnetic layer, the mask structure being formed with an edge located a desired distance from an air bearing surface plane. An ion milling operation is performed to remove portions of the magnetic layer that are not protected by the mask structure, the ion milling being performed in a manner to form a tapered surface on the first magnetic layer. Then, a second magnetic layer is deposited over the first magnetic layer to form a tapered magnetic write pole.

Abstract: A method for generating a Linear Dispersion Code (LDC) for use in a Multiple-Input Multiple-Output (MIMO) communication system in which M transmit antennas are used to transmit a codeword over T time slots, each codeword encoding Q constellation symbols, is provided. The method includes determining M, T and Q, wherein M, T and Q are real numbers, generating a first matrix having 2Q columns and a predefined number m of rows, each column including a plurality of elements, each element being a real number within a respective predefined range for the respective row, deriving a second matrix having 2Q columns and m rows from the first matrix such that the elements of one row of the second matrix are dependent upon the corresponding elements of a corresponding row of the first matrix, and upon M and T, and deriving a set of 2Q LDC dispersion matrices, each including dimensions T×M, from the second matrix.

Abstract: Methods of fabricating perpendicular write elements for perpendicular magnetic recording heads are discussed. In write element fabrication, write poles are fabricated according to one of many desired methods. The write poles during fabrication are typically covered by a hard mask and a photolithographic soft mask. According to the methods described herein, the soft mask is removed such as by chemical etching. The hard mask is then removed, such as by CMP and ion etching, to expose the write poles. Shield gap material may then be deposited on the write poles to define the shield gap between the write poles and the trailing shields. Trailing shield material may then be deposited on the shield gap material to form the trailing shields corresponding with the write poles.

Abstract: A supporting bracket for adjusting tilt of a liquid crystal display (LCD) includes a fixing member configured for supporting the LCD, a gear capable of rotating in the fixing member, and a sliding member received in the fixing member configured for connecting to the LCD. The sliding member comprises a rack to engage with teeth of the gear. The gear rotates to drive the sliding member moving relative to the fixing member to adjusting the angle of the LCD.

Abstract: A method of making a magnetoresistive sensor includes defining a track width of a magnetoresistive element stack of the sensor. Further, processes of the method enable depositing of hard magnetic bias material on each side of the stack. These processes may permit both milling of excess depositions of the material outside of regions where the hard magnetic bias material is desired via use of a photoresist and making the material have a planar surface via chemical mechanical polishing, which also removes the material on top of the stack. The method includes removing excess material outside of the photoresist, wherein the excess material includes part of the hard bias layer, while a portion of the hard bias layer remains directly above the MR sensor stack.

Abstract: A magnetic disk drive head is disclosed including a write head, which includes a P1 layer having a pedestal portion, a gap layer formed on the P1 layer, and a P2 layer formed on the gap layer. The P1 layer includes a shoulder formation having a neck portion and a beveled portion. Also disclosed is a disk drive having a write head with a P1 layer with shoulder formation, and a method for fabricating a write pole for a magnetic recording head having a P1 layer with shoulder formation.

Abstract: A magnetic write head for perpendicular magnetic recording having a write pole with a concave trailing edge. The magnetic write pole can have a trapezoidal shape with first and second laterally opposed sides that are further apart at the trailing edge than at the leading edge. The write head may or may not include a magnetic trailing shield, and if a trailing shield is included it is separated from the trailing edge by a non-magnetic write gap layer. The concave trailing edge improves magnetic performance such as by improving the transition curvature. A method for constructing the write head includes forming a magnetic write pole by forming a mask structure over a deposited write pole material, the mask structure having an alumina hard mask and an image transfer layer such as DURAMIDE®. An alumina fill layer is then deposited and a chemical mechanical polish is performed to open up the image transfer layer.

Abstract: A mounting apparatus for a data storage device includes a chassis (10), a data storage device (50) with a groove (522) defined in a sidewall (52) thereof, a supporting bracket (20) fixed to the chassis (10), the supporting bracket (20) having a sidewall (22) defining a through hole (221) and a recess (228) therein and a positioning member (30) adapted to be pivotably mounted to the supporting bracket (20). The positioning member (30) has a protrusion (361) engaging in the recess (228) for locating the positioning member (30) and a locating pin (341) extending through the through hole (221) of the supporting bracket (20) to engage in the groove (522) of the data storage device (50) for securing the data storage device (50) on the chassis (10).

Abstract: A music playing evaluation system, comprising: (i) an input, (ii) a real-time digital signal processing system having an A/D converter, a signal storage, a volume analyzer, a pitch analyzer, a tempo analyzer and a music notes recognizer, (iii) an original score storage, (iv) a played score storage, (v) a performance analyzer, (vi) a music output interface, and (vii) a music display interface, wherein the played music is analyzed, and the amplitude information, the pitch information and the tempo information are extracted and sent to the music notes recognizer and the played music score is obtained. The played music score is compared with the original music score in real time based on the amplitude information, the pitch information and the tempo information extracted from the played music so as to generate a performance evaluation report displayed on the music display interface.

Abstract: Methods and structures for the fabrication of a thin film, perpendicular recording write head are disclosed. The fabrication involves the deposition of two different oxide layers which have mutually high etch selectivities. This characteristic allows a write pole structure to be built wherein the track width is independent of the location of the flare point. The process also produces a structure wherein the throat height of the shield is self aligned to the location of the flare point of the write pole.

Abstract: A method of making a magnetoresistive sensor includes defining a track width of a magnetoresistive element stack of the sensor. Further, processes of the method enable depositing of hard magnetic bias material on each side of the stack. These processes may permit both milling of excess depositions of the material outside of regions where the hard magnetic bias material is desired via use of a photoresist and making the material have a planar surface via chemical mechanical polishing, which also removes the material on top of the stack.

Abstract: Methods and structures for the fabrication of a thin film, perpendicular recording write head are disclosed. The structure provides a pole tip separated from a rear pole by a non-magnetic separation layer located adjacent the flare point. The rear pole contains an imbedded non-magnetic layer. The separated pole tip and imbedded layer aid in the high data rate recording as well as the erasure performance of the write pole structure. The fabrication involves the deposition of two different oxide layers which have mutually high etch selectivities. This characteristic allows a write pole structure to be built wherein the track width is independent of the location of the flare point. The process also produces a structure wherein the placement of the throat height of the shield is self aligned to the flare point of the write pole.

Abstract: Read elements and associated methods of fabrication are disclosed. During fabrication of the read element, and more particularly, the fabrication of the hard bias magnets, a non-magnetic sacrificial layer is deposited on top of the hard bias material. When a CMP process is subsequently performed, the sacrificial layer is polished instead of the hard bias material. The thicknesses of the hard bias magnets are not affected by the CMP process, but are rather defined by the deposition process of the hard bias material. As a result, the variations in the CMP process will not negatively affect the magnetic properties of the hard bias magnets so that they are able to provide substantially uniform effective magnetic fields to bias the free layer of the magnetoresistance (MR) sensor of the read element.