Patents Issued in July 17, 2008
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Publication number: 20080170289Abstract: A Raman waveguide amplifier includes a waveguide comprising a core of a Raman-active medium dimensioned and configured as a self-imaging multimode waveguide. At least one input signal is coupled into the core at a wavelength within a Raman gain spectrum of the Raman-active medium relative to at least one pump beam. The pump beam is coupled into the core so as to amplify the at least one input signal via stimulated Raman scattering to provide an output signal corresponding to an amplified replica of the at least one input signal.Type: ApplicationFiled: January 16, 2007Publication date: July 17, 2008Inventors: Robert Rex Rice, Hagop Injeyan, Hiroshi Komine, Joseph M. Fukumoto, Bahram Jalali
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Publication number: 20080170290Abstract: A Raman amplifying device includes a plurality of Raman amplifiers having a gain wavelength characteristic with a gain peak at which an amplification gain becomes the largest, including a first Raman amplifier having a gain wavelength characteristic with a plurality of gain peaks including a first gain peak and a second gain peak adjacent to the first gain peak; a second Raman amplifier having a gain wavelength characteristic with at least one gain peak including a third gain peak between the first gain peak and the second gain peak; and a third Raman amplifier having a gain wavelength characteristic with a fourth gain peak between the first gain peak and the third gain peak, the fourth gain peak forming an arithmetic sequence between the first gain peak and the third gain peak.Type: ApplicationFiled: February 25, 2008Publication date: July 17, 2008Applicant: THE FURUKAWA ELECTRIC CO., LTD.Inventors: Koji Fujimura, Masami Ikeda, Misao Sakano
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Publication number: 20080170291Abstract: The present invention relates to a laser processing apparatus which can be miniaturized and has a structure for achieving effective protection of the fiber laser light source. The laser processing apparatus comprises a fiber laser light source, a collimator, a spatial filter, an optical isolator, and a condenser lens. The optical isolator emits laser light from the collimator laser light in parallel to the direction of incidence of the laser light, and emits return light from the condenser lens at a predetermined angle with regard to the direction of incidence of the return light. The spatial filter comprises a pair of condenser lenses disposed such that the focal point is formed therebetween, and a pinhole mask disposed such that the pinhole is located at the focal point. At least, a part of the return light emitted from the optical isolator is blocked by the pinhole mask of the spatial filter.Type: ApplicationFiled: January 9, 2008Publication date: July 17, 2008Applicant: Sumitomo Electric Industries, Ltd.Inventors: Kazuo Nakamae, Hiroki Moriwaki
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Publication number: 20080170292Abstract: An observation apparatus for observing an observation object mounted at an observation position on a stage through an immersion objective lens placed below the observation object. The observation apparatus has a liquid pouring device, constructed to be relatively movable with respect to the immersion objective lens, pouring a liquid on a top lens surface of the immersion objective lens from the upper side of the immersion objective lens at a distance from the observation position on the stage; and a position control device automatically adjusting relative positions of a liquid pouring position of the liquid pouring device and the immersion objective lens and automatically adjusting relative positions of the immersion objective lens on which the liquid is poured by the liquid pouring device and a desired observation position on the stage.Type: ApplicationFiled: January 7, 2008Publication date: July 17, 2008Applicant: OLYMPUS CORPORATIONInventors: Mitsuo HARADA, Yoshihiro Shimada
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Publication number: 20080170293Abstract: It has been discovered that emissive display devices can be used to provide display functionality in dynamic autostereoscopic displays. One or more emissive display devices are coupled to one or more appropriate computing devices. These computing devices control delivery of autostereoscopic image data to the emissive display devices. A lens array coupled to the emissive display devices, e.g., directly or through some light delivery device, provides appropriate conditioning of the autostereoscopic image data so that users can view dynamic autostereoscopic images.Type: ApplicationFiled: March 15, 2007Publication date: July 17, 2008Inventors: Mark E. Lucente, Michael A. Klug, Anthony W. Heath, Tizhi Huang, Mark E. Holzbach
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Publication number: 20080170294Abstract: A retardation film having excellent optical characteristic realizing properties, which is capable of obtaining a highly durable polarizing plate having a viewing angle compensating function by being used as a polarizing plate protection film. The retardation film can be used as a viewing angle compensating film of a liquid crystal display of the IPS system, with a wide realizable range of optical characteristics, excellent adhesion properties to a polarizer, and the adjustment easiness of the optical characteristics. The retardation film has an optically anisotropic film, an optically anisotropic layer, and a first optically anisotropic material showing a positive dispersion type wavelength dependency of a retardation, in which a refractive index nx1 of a lagging phase axis direction in an in-plane direction and a refractive index ny1 of a leading phase axis direction in the in-plane direction satisfy the formula of nx1>ny1.Type: ApplicationFiled: October 16, 2007Publication date: July 17, 2008Inventors: Takashi KURODA, Runa NAKAMURA, Hiroki NAKAGAWA, Yuya INOMATA, Masanori FUKUDA
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Publication number: 20080170295Abstract: Use of an organic optical material whose Abbe's number (vd) and secondary dispersion (?g,F) satisfy the relationship ?g,F??2vdĂ—10?3+0.59 provides an optical material which causes reduced optical scattering, the optical material having excellent optical scattering characteristics and secondary dispersion characteristics equivalent to those of a compound in which fine particles of conductive metal oxides such as ITO are dispersed in an organic resin.Type: ApplicationFiled: December 19, 2007Publication date: July 17, 2008Applicant: CANON KABUSHIKI KAISHAInventor: Hidefumi Iwasa
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Publication number: 20080170296Abstract: An optical manifold for efficiently combining a plurality of blue LED outputs to illuminate a phosphor for a single, substantially homogeneous output, in a small, cost-effective package. Embodiments are disclosed that use a single or multiple LEDs and a remote phosphor, and an intermediate wavelength-selective filter arranged so that backscattered photoluminescence is recycled to boost the luminance and flux of the output aperture. A further aperture mask is used to boost phosphor luminance with only modest loss of luminosity. Alternative non-recycling embodiments provide blue and yellow light in collimated beams, either separately or combined into white.Type: ApplicationFiled: August 6, 2007Publication date: July 17, 2008Applicant: Light Prescriptions Innovators, LLCInventors: Julio C. Chaves, Waqidi Falicoff, Juan C. Minano, Pablo Benitez, Oliver Dross, William A. Parkyn
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Publication number: 20080170297Abstract: An optical unit includes one or more optical elements. At least one 40 of the optical elements has: an optical functional surface, that refracts incident light, within an effective diameter; and a rough surface 49 formed on an optical functional surface 42b that is formed outside the effective diameter and that scatters the incident light which has been internally reflected. With this configuration, light which is incident on the optical element and which may generate flare or the like when it is internally reflected by the optical functional surface outside the effective diameter is scattered by the rough surface formed on the optical functional surface outside the effective diameter. Therefore, generation of the flare or the like is suppressed. Also, since the optical unit is constituted by such an optical element having the rough surface, generation of the flare or the like is suppressed.Type: ApplicationFiled: December 17, 2007Publication date: July 17, 2008Inventor: Yohei SHINOZAWA
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Publication number: 20080170298Abstract: The invention relates to a device (22) comprising a first layer of material (10), a second layer of material (20) and walls (14) defining tight cavities (16) between the first and second layers of material, at least partially filled with a fluid (18), blocks (50, 60) rigidly connected to the first layer of material (10), and defining a housing (500) filled at least partially (V) of the material of the second layer (20). According to the invention, the housings (500) of the blocks each form an adhesion point of a sealing material (20) of the cavities (16).Type: ApplicationFiled: January 10, 2008Publication date: July 17, 2008Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUEInventor: Jean-Charles SOURIAU
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Publication number: 20080170299Abstract: An imaging device includes: a plurality of photoelectric conversion devices configured to convert a received light into an electronic signal; a plurality of collector lenses configured to collect a light and to supply the light to the photoelectric conversion devices, the collector lenses being arranged before each of the photoelectric conversion devices; and a fluid lens configured to refract a light and to supply the light to the collector lenses, the fluid lens being arranged before the collector lenses, wherein the fluid lens has a first and second fluids with refractive indices different from each other and an electrode that applies a voltage to the first and second fluids, and the fluid lens changes an interface topology between the fluids in accordance with a voltage to be applied to the electrode and varies a refractive index of a light supplied to each of the plurality of the collector lenses.Type: ApplicationFiled: January 11, 2008Publication date: July 17, 2008Applicant: Sony CorporationInventor: Masaru Kawabata
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Publication number: 20080170300Abstract: The invention relates to a less costly zoom lens that can offer a sensible tradeoff between size reductions and high zoom ratios with a well-kept image quality, and that lends itself to an electronic imaging device such as a CCD or CMOS. The zoom lens comprises a positive first lens group G1, a negative second lens group G2, a positive third lens group G3 and a positive fourth lens group G4, wherein zooming is implemented by changing the space between adjacent lens groups. The first lens group G1 comprises one positive lens, the second lens group G2 comprises two lenses, and the fourth lens group G4 comprises one positive lens. The zoom lens satisfies condition (1) needed for making sure an ideal situation for the zoom ratio and low costs and condition (2) needed for the first lens group to comprise a minimum one lens and to hold back chromatic aberration of magnification as much as possible.Type: ApplicationFiled: December 7, 2007Publication date: July 17, 2008Inventors: Fumikazu Kanetaka, Toshio Takahashi, Tomoyuki Satori
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Publication number: 20080170301Abstract: A sensor mounting structure for mounting sensors onto sensor mounting portions formed on a case body includes: an elastically deformable mounting flat spring mounted on the case body so as to cover outer surface part of the case body, allowing the sensors to be mounted on the sensor mounting portions by pressing the sensors from outside. The mounting flat spring includes sensor pressing portions for pressing the sensors, a pair of pressed portions being pressed in directions nearing each other from outer surface sides by predetermined members, and engaging portions for engaging with the case body in a direction orthogonal to the directions in which the pressed portions are pressed.Type: ApplicationFiled: December 13, 2007Publication date: July 17, 2008Applicant: Sony CorporationInventors: Yutaka MAEDA, Tsubasa Sugiyama
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Publication number: 20080170302Abstract: Provided is a camera module. The camera module includes an aperture stop, a first lens, a second lens, a third lens, and an image sensor. The first lens has a positive refractive power to transmit light that has passes through the aperture stop, and the second lens has a negative refractive power to transmit light that has passed through the first lens. The third lens has a negative refractive power to transmit light that has passed through the second lens. The image sensor detects light that has passed through the third lens.Type: ApplicationFiled: April 13, 2007Publication date: July 17, 2008Inventor: Hye Jung Jeong
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Publication number: 20080170303Abstract: Optical assembly supported in an arrangement, especially in an objective (1, 8) or in an illuminating or exposure system, in the interior of a housing comprising at least one optical element, especially a lens (34, 35), a mirror, or an aperture (9), wherein the at least one element is influenceable by at least one manipulator and wherein (i) the at least one manipulator (10, 22, 25) is arranged either outside of the housing or in a holding means that is separated entirely or to a large extent by the help of a decoupling means, and that there is provided an effective coupling between the manipulator (10, 22, 25) and the element to be influenced by the manipulator (10, 22, 25) in the interior of the arrangement, (ii) the manipulator comprises a mechanism for adjusting precisely or for micro-adjusting of the optical element, or (iii) the manipulator comprises a first and a second means wherein the first means generates a repelling force and/or a repelling torque and the second means (5, 6, 11, 15, 19) counteractType: ApplicationFiled: January 26, 2006Publication date: July 17, 2008Applicant: CARL ZEISS SMT AGInventors: Hermann Bieg, Karl-Eugen Aubele, Yim-Bun Patrick Kwan, Stefan Xalter, Martin Schmidt, Saverio Sanvido, Uy-Liem Nguyen
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Publication number: 20080170304Abstract: A tilt adjustment device K for objective lenses which comprises: a positioning stand 52 for supporting a holder 3 which fixedly holds a first objective lens 1; at least three pins 57a, 57b, and 57c for supporting an inferior surface of an edge of a second objective lens 2 by each tip of the pins; a pin fixedly supporting member 57 for fixedly supporting the ends of the pins; tilt adjusting means for tilting the pin fixedly supporting member 57 so that the second objective lens 2 is tilt-adjusted around a principal point center with respect to an inferior surface of an edge of the first objective lens 1; and a press member 54 for pressing a superior surface of the second objective lens 2, which can be removed after the second objective lens 2 is fixed.Type: ApplicationFiled: January 10, 2008Publication date: July 17, 2008Applicant: SHARP KABUSHIKI KAISHAInventor: Akiho Yoshizawa
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Publication number: 20080170305Abstract: A lens module includes a holder and a barrel. The barrel has at least one lens received therein. At least one given lens is integrated with the barrel and the holder. A method for making a lens module includes the steps of: providing a die assembly having a molding cavity configured for forming an integrated structure including a lens, a barrel, and a holder; placing a moldable material capable of being molded as the integrated structure into the molding cavity; and forming the moldable material into the integrated structure.Type: ApplicationFiled: June 1, 2007Publication date: July 17, 2008Applicant: HON HAI PRECISION INDUSTRY CO., LTD.Inventor: TIEN-WU TSAI
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Publication number: 20080170306Abstract: A lens support structure includes a third lens 53, a fourth lens 54, a first frame 50, and an adhesive agent 58. The first frame 50 has a first portion 55 to which the third lens 53 is fitted and a second portion 56 where the second lens element is disposed inside the inner periphery thereof. The adhesive agent 58 fixes the fourth lens 54 to the first frame 50. The material of the fourth lens 54 has lower stiffness than the material of the third lens 53, or has a larger coefficient of linear expansion. A gap S is formed in the radial direction between the fourth lens 54 and the second portion 56. The inside diameter of the first portion 55 is different from the inside diameter of the second portion 56.Type: ApplicationFiled: January 15, 2008Publication date: July 17, 2008Inventor: Dai SHINTANI
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Publication number: 20080170307Abstract: A focussing device for a lens, including a frame, a lens carrier movable relative to the frame from a first position along an optical axis, a motor for driving the lens carrier along the optical axis, and at least one biasing member adapted to bias the lens carrier towards the first position. The biasing member may include one or more bending members.Type: ApplicationFiled: January 11, 2008Publication date: July 17, 2008Applicant: STMicroelectronics (Research & Development) LimitedInventors: Colin Campbell, Eric Saugier
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Publication number: 20080170308Abstract: A cover to shield a portion of an arc lamp from electromagnetic radiation is disclosed. The cover has a reflective surface formed from a reflective material suitable to reflect the electromagnetic radiation.Type: ApplicationFiled: January 12, 2007Publication date: July 17, 2008Applicant: ASML NETHERLANDS B.V.Inventors: Marcel Mathijs Theodore Marie Dierichs, Henricus Wilhelmus Maria Van Buel, Rene Alexander Dominicus Toussaint, Raoul Maarten Simon Knops
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Publication number: 20080170309Abstract: A mirrored element (101) includes a first section (201) that is translucent when a backlight (301) is on and mirrored when the backlight is off (301). A second section (203) provides a mirrored surface when the backlight (301) is on and when the backlight (301) is off. The mirrored element (101) may optionally be provided with an enclosure (103). A baking process may be utilized to provide the second section (203) of the mirrored element (101).Type: ApplicationFiled: January 13, 2007Publication date: July 17, 2008Inventor: Jacek Helenowski
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Publication number: 20080170310Abstract: The disclosure generally relates to imaging optical systems that include a plurality of mirrors, which image an object field lying in an object plane in an image field lying in an image plane, where at least one of the mirrors has a through-hole for imaging light to pass through. The disclosure also generally relates to projection exposure installations that include such im-aging optical systems, methods of using such projection exposure installa-tions, and components made by such methods.Type: ApplicationFiled: January 9, 2008Publication date: July 17, 2008Applicant: CARL ZEISS SMT AGInventor: Hans-Juergen Mann
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Publication number: 20080170311Abstract: An ultracompact, lightweight, reflective telescope is described which has no loss due to central obscuration for a beam being projected from its focus. The optical surfaces are composed of matched conics of rotation.Type: ApplicationFiled: January 16, 2007Publication date: July 17, 2008Inventor: Eiji Steven Yafuso
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Publication number: 20080170312Abstract: This invention deals with novel method and apparatus for positioning and motion control of the optical elements (mirrors and lenses) of a Fresnel solar concentrator tracking array which approximately eliminates gravitational torque by use of a central universal pivot or gimbals. Linkage torque is produced by induced and/or permanent dipole coupling to an electronic grid to produce angular deflection, and rotational motion that is enhanced by the presence of highly polarizable material. This system is ideally suited for maximization of solar energy focused by the array onto a receiver. Since there are no mechanical linkages, the instant invention is applicable for fabrication from the mini- to the nano-technology realm. The elimination of gravitational torque by balancing the optical elements on a universal pivot or gimbals greatly reduces the power required for the optical elements to track the sun and focus sunlight onto a receiver.Type: ApplicationFiled: March 10, 2008Publication date: July 17, 2008Inventor: Mario Rabinowitz
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Publication number: 20080170313Abstract: A card viewer having a main body having a cover with at least one transparent portion, a first reflective surface, and a second reflective surface. The image of the first side of the card is received by the second reflective surface, transferred from the second reflective surface to the first reflective surface, and observed on the first reflective surface from the location above a second side of the card through a single transparent portion of the at least one transparent portion. The viewer can include at least one clamping device to secure the viewer to an object or the viewer can be made integrally with the object.Type: ApplicationFiled: January 17, 2007Publication date: July 17, 2008Inventors: William A. Sims, William A. Sims
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Publication number: 20080170314Abstract: A color wheel assembly includes a motor and a color filter. The motor has a main body and a housing. The housing is integrally formed and covers the main body. The color filter is disposed directly on the housing.Type: ApplicationFiled: December 6, 2007Publication date: July 17, 2008Inventors: Kuang-Hua Chang, Chih-Huang Wang, Ke-Shu Chin, Chong-Han Tsai, Kai Hsiung Tsao, Shiau-Wu Lai
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Publication number: 20080170315Abstract: The present disclosure is directed to spectral analysis of a position error signal. In a particular embodiment, the method includes analyzing a spectral content of a position error signal. The method also includes comparing the spectral content to a threshold. Further, the method includes determining a result based on the comparing the spectral content to the threshold. In another particular embodiment, the spectral content of the position error signal is determined by performing a discrete fourier transform (DFT) on the error signal, determining a magnitude of the DFT output, and low pass filtering the magnitude.Type: ApplicationFiled: January 12, 2007Publication date: July 17, 2008Applicant: SEAGATE TECHNOLOGY, LLCInventors: Jeff Nelson, Farhad Navid, Richard Martin, Anton Viktorovich Goldade
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Publication number: 20080170316Abstract: A method of using an optical test stand to perform both intensity-based and phase-based interferometry to create improved estimates of the flying height of a slider off of rotating disk surface, which are used to generate a three-dimensional map of the air bearing surface, crown and camber estimates, take-off and touch down estimates, all of which are product of these methods. Apparatus implementing these methods.Type: ApplicationFiled: January 17, 2007Publication date: July 17, 2008Inventor: Dongman Kim
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Publication number: 20080170317Abstract: An inspection head is used for an inspecting apparatus that inspects whether there is an abnormal projection on a disk surface having a first lubrication layer, and floats over the disk surface. The inspection head includes a floating surface covered with a second lubrication layer that is repellent to the first lubrication layer.Type: ApplicationFiled: November 19, 2007Publication date: July 17, 2008Applicant: Fujitsu LimitedInventors: Masahiro Aizawa, Takeshi Tokairin, Jun Fujii, Takako Yamauchi
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Publication number: 20080170318Abstract: The magnetic recording medium includes a substrate and a recording layer formed in a predetermined concavo-convex pattern over the substrate, and the recording layer includes recording elements each formed as a convex portion of the recording layer. Surface steps are formed in an inner area including a radially innermost portion of a recording area. Each surface step is formed in such a manner that a portion over a concave portion between the recording elements is recessed toward a substrate to a level below a portion over the recording element. The surface steps are formed such that the recording area can be sectioned into an annular area adjoining the inner area and the inner area where height of the surface steps is larger than that in the annular area.Type: ApplicationFiled: December 20, 2007Publication date: July 17, 2008Applicant: TDK CORPORATIONInventors: Takahiro Suwa, Kazuya Shimakawa
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Publication number: 20080170319Abstract: A magnetic recording apparatus includes a write element and an optical device for heating a portion of a magnetic medium. The optical device and the write element are arranged to generally prevent the write element from affecting the optical fields generated by the optical device.Type: ApplicationFiled: January 17, 2007Publication date: July 17, 2008Applicant: Seagate Technology LLCInventors: Michael Allen Seigler, Sharat Batra, William Albert Challener, Hua Zhou
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Publication number: 20080170320Abstract: An actuator supports a head at one end of a rotatably supported shaft unit and supports a coil of a voice coil motor at the other end, and moves the head to an arbitrary track position of a recording medium. A sensor, attached to a coil support unit of the actuator, detects the coil vibration and outputs a vibration detected signal. A control unit controls the actuator to reduce a head position error signal based on the vibration detected signal of the sensor in time of seek and in time of settling of moving the head to a target track position on the medium through drive of the actuator and drawing the same. The vibration detected signal of the sensor includes bending vibration component of the coil and the twisting vibration component of the coil when the actuator is driven.Type: ApplicationFiled: November 5, 2007Publication date: July 17, 2008Applicant: Fujitsu LimitedInventors: Kei Funabashi, Tomoyoshi Yamada, Takeyori Hara
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Publication number: 20080170321Abstract: Upon correction, an amplitude measurement unit repeats a process of attaining a write heat state by a write clearance control unit and writing user data to a data region of a measurement track in the state in which a head is positioned to an arbitrary measurement track and then switching the state to a read heat state by a read clearance control unit so as to detect an amplitude of a read signal from a preamble unit in a servo region. A variance calculation unit calculates a variance from the plurality of amplitude measurement values measured by the amplitude measurement unit; and a contact determination unit repeats the measurement process by the amplitude measurement unit while sequentially increasing the base heater control value when the variance is less than a predetermined threshold value and determines contact between the head and the medium when the variance exceeds the threshold value.Type: ApplicationFiled: November 9, 2007Publication date: July 17, 2008Applicant: Fujitsu LimitedInventor: Toru Shimozato
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Publication number: 20080170322Abstract: Embodiments of the present invention provide a data recording device capable of achieving desired performance while increasing the convergence rate. According to one embodiment, in a data recording device, an update-width determination unit included in a setting updating unit determines an update-width of a set frequency Ć’ in a digital filter according to the size of a position error signal PES, and an update-width adjuster included in the setting updating unit changes the update-width of the set frequency Ć’ determined by the update-width determination unit according to the size of the set frequency Ć’. Thus, while the convergence rate being kept properly, the set frequency Ć’ can precisely be converged on a frequency of a disturbance component.Type: ApplicationFiled: January 15, 2008Publication date: July 17, 2008Applicant: Hitachi Global Storage Technologies Inc.Inventor: Takashi Konishi
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Publication number: 20080170323Abstract: A method for writing servo information onto a disk of a hard disk drive with a servo writer. The method includes accelerating a head to a constant velocity across a disk. The disk being defined as having an acceleration zone and a constant velocity zone. The head is then used to write a spiral servo pattern in the constant velocity zone. A final servo pattern is written in the constant velocity zone using the spiral servo pattern. A servo reference pattern is also written in the acceleration zone. The servo reference pattern is used to write a final servo pattern in the acceleration zone. The final servo pattern may be copied using a run-out cancellation algorithm to improve the accuracy of the servo pattern in the acceleration zone.Type: ApplicationFiled: October 17, 2006Publication date: July 17, 2008Inventors: Bipinchandra V. Gami, Yih Hurng Jung, Hao Ping Wen, Kwong-Tat Chan
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Publication number: 20080170324Abstract: On a rotary-type magnetic recording medium, servo patterns are formed in servo pattern regions on one surface and the other surface of a disk-shaped substrate by patterns including recording regions and non-recording regions. In the servo pattern regions on both the one surface and the other surface, plural functional regions are defined in order in a direction of rotation of the magnetic recording medium. In the pattern formed in at least one region out of the plural functional regions on the one surface, the non-recording regions are formed at formation positions on the one surface corresponding to formation positions of the recording regions on the other surface and the recording regions are formed at formation positions on the one surface corresponding to formation positions of the non-recording regions on the other surface.Type: ApplicationFiled: January 11, 2008Publication date: July 17, 2008Applicant: TDK CORPORATIONInventors: Shuichi OKAWA, Kazuhiro HATTORI, Makoto MORIYA
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Publication number: 20080170325Abstract: The present invention provides a centering assembly for centering a plurality of disks being assembled onto a spindle hub, and further provides a spindle hub being capable of centering disks being assembled.Type: ApplicationFiled: January 11, 2008Publication date: July 17, 2008Applicant: LaserResearch (S) Pte LtdInventors: Kien Wee LAI, Alex MORARU, Jui Kiat GOH
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Publication number: 20080170326Abstract: A head gimbal assembly (HGA) has an improved interconnection between a head slider and a suspension of the HGA. The interconnection is achieved by using a reverse surface of an air bearing surface of the head slider as bonding surface to provide more space for arranging more slider electrical bonding pads thereon. The head slider is mechanically and electrically connected to the suspension at the bonding surface to have good performance on shocking conditions. The suspension further has an attitude control layer located between the head slider and the suspension. The attitude control layer serves as a datum plate for the head slider lying thereon and supporting the head slider so as to ensure the head slider a good attitude and reduce variation of slider flying height. The present invention also discloses a magnetic disk drive with the improved HGA and a fabricating method for the HGA.Type: ApplicationFiled: January 12, 2007Publication date: July 17, 2008Inventors: XianWen Feng, YiHua Pei, JuGang Zhang, ShuMing Zhang, Takeshi Nakada, ShanLin Hao
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Publication number: 20080170327Abstract: The present invention provides a method for forming a carbon protective film and a method for producing a magnetic recording medium, that decreases the generation of particles in a plasma CVD apparatus thereby improving flatness of the surface of a carbon protective film, and also can manufacture a magnetic recording medium having high recording density and excellent recording/reproducing characteristics; a magnetic recording medium; and a magnetic recording/reproducing apparatus using the magnetic recording medium.Type: ApplicationFiled: January 10, 2008Publication date: July 17, 2008Applicant: SHOWA DENKO K.K.Inventor: Hiroyuki MACHIDA
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Publication number: 20080170328Abstract: The present invention provides a magnetic head that can sustain favorable head contact even when magnetic tapes having different thicknesses are used. A magnetic head has a sliding surface coming in contact with a moving magnetic tape. An electromagnetic transducing element is disposed in the sliding surface. First edges are formed at each end of the sliding surface in the direction of movement of the magnetic tape. Second edges are formed in positions extended in the direction of movement of the magnetic tape from each end of the sliding surface and come in contact with the magnetic tape.Type: ApplicationFiled: January 10, 2008Publication date: July 17, 2008Inventors: Shinji Kawakami, Toshio Kawakita, Sadamu Kuse
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Publication number: 20080170329Abstract: A method of manufacturing a granular perpendicular magnetic recording medium with improved corrosion resistance comprises sequential steps of providing a non-magnetic substrate including a surface; forming a soft magnetic underlayer (SUL) over the surface; post-deposition heating the SUL; forming an intermediate layer stack over the heated SUL; and forming at least one granular, magnetically hard perpendicular magnetic recording layer over the intermediate layer stack. Heating of the SUL prior to formation of the intermediate layer stack results in formation of an intermediate layer stack with a smoother surface and a granular perpendicular recording layer with increased corrosion resistance than when SUL post-deposition heating is not performed.Type: ApplicationFiled: January 11, 2007Publication date: July 17, 2008Inventors: Raj Thangaraj, Huan Tang, Jing Gui, John Wang, Tommy T. Cheung
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Publication number: 20080170330Abstract: A recording tape cartridge is structured so as to accommodate, within a case, a reel on which is wound a magnetic tape which is a recording medium. The recording tape cartridge has a so-called WORM function such that overwriting of data on a recording region of the magnetic tape where data is already written, is prohibited. Within the case are provided a first memory board which stores data managing information for managing data written on the magnetic tape, and a second memory board which stores WORM managing information for managing writing of data to the magnetic tape.Type: ApplicationFiled: February 28, 2008Publication date: July 17, 2008Applicant: FUJIFILM CORPORATIONInventor: Katsuki Asano
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Publication number: 20080170331Abstract: A magnetic recording medium is provided, which has recording layers having concavo-convex patterns formed on both sides of a substrate and can easily distinguish one face from the other face. A magnetic recording and reproducing apparatus having the magnetic recording medium is also provided. The magnetic recording medium includes a substrate, a first recording layer formed in a first concavo-convex pattern on a side of a first face, and a second recording layer formed in a second concavo-convex pattern on a side of a second face. The magnetic recording medium also includes a distinction element which can distinguish the first face from the second face. At least part of the distinction element is disposed in a non-recording area adjacent to at least one of an inner part and an outer part of a recording area in a radial direction.Type: ApplicationFiled: January 3, 2008Publication date: July 17, 2008Applicant: TDK CORPORATIONInventors: Daisuke Yoshitoku, Minoru Fujita, Narutoshi Fukuzawa
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Publication number: 20080170332Abstract: Embodiments of the present invention provide a slider that may suppress contamination from being attached to the flying surface of the slider without influence on reduction of the flying height of the slider, and a method for producing the same. According to one embodiment, ions exerting an effect of decreasing surface energy are implanted in the whole surface of a flying surface of a magnetic head slider except for a front rail surface and a center rail surface. According to this, contamination is prevented from being attached to a front step bearing surface, a side step bearing surface, a center step bearing surface and a negative pressure groove where contamination is particularly liable to be attached in the flying surface of the magnetic head slider, so as to suppress destabilization in flying of the slider.Type: ApplicationFiled: September 7, 2007Publication date: July 17, 2008Applicant: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Yuki Shimizu, Junguo Xu, Jianhua Li, Hidekazu Kohira, Tetsuya Matsusaki, Hidetoshi Anan
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Publication number: 20080170333Abstract: A stepped-part 4b with a lower tip side is formed on the top face of a pattern end 4, and a lower face 4c thereof is used as a plane on which a solder ball 7 is provided. One or more protrusions 4d made of a swollen conductive layer are formed on the lower face to limit displacement of the solder ball in the tip direction and the both side directions. The solder ball is held by the protrusions to suppress deviation of the solder ball.Type: ApplicationFiled: January 11, 2008Publication date: July 17, 2008Inventors: Tetsuya Ohsawa, Naohiro Terada
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Publication number: 20080170334Abstract: According to an aspect of an embodiment, a magnetic head comprises a magnetic pole; a first return yoke located under a lower side of the magnetic pole; a second return yoke located over an upper side of the magnetic pole; and a side yokes made of a soft magnetic material, located adjacently to the end of the magnetic pole and connecting the first return yoke and the second return yoke.Type: ApplicationFiled: December 27, 2007Publication date: July 17, 2008Applicant: Fujitsu LimitedInventor: Mitsuru Otagiri
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Publication number: 20080170335Abstract: A read/write head for magnetic tapes configured with an in situ radio frequency (RF) shield is provided. The RF shield of the invention inhibits device elements reading data from reading RF radiation irradiated by other device elements writing data. The RF shield may be situated between the device elements of one module and the device elements of a second module. The dimensions and materials of the RF shield may be selected depending upon the operating frequencies of the head and skin depth of materials comprising the RF shield. The data cable may be bonded to device element pads of a module using ACF bonding. AFC bonding the cable to the module may allow a metal ground plane on the cable to be extended to provide additional RF shielding.Type: ApplicationFiled: January 15, 2007Publication date: July 17, 2008Inventors: Icko E. T. Iben, Luis H. Palacies, Andrew C. Ting
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Publication number: 20080170336Abstract: The invention provides a giant magneto-resistive effect device (CPP-GMR device) having the CPP (current perpendicular to plane) structure comprising a spacer layer, and a first ferromagnetic layer and a second ferromagnetic layer stacked one upon another with the spacer layer interposed between them, with a sense current applied in a stacking direction, wherein the spacer layer comprises a first nonmagnetic metal layer and a second nonmagnetic metal layer, each made of a nonmagnetic metal material, and a semiconductor oxide layer interposed between the first nonmagnetic metal layer and the second nonmagnetic metal layer, the semiconductor oxide layer that forms a part of said spacer layer contains zinc oxide as its main component wherein the main component zinc oxide contains an additive metal, and the additive metal is less likely to be oxidized than zinc.Type: ApplicationFiled: January 3, 2008Publication date: July 17, 2008Applicant: TDK CorporationInventors: Yoshihiro TSUCHIYA, Tomohito Mizuno, Kei Hirata, Koji Shimazawa, Shinji Hara
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Publication number: 20080170337Abstract: A TMR element includes a lower electrode layer, a TMR multi-layer stacked on the lower electrode layer, and an upper electrode layer stacked on the TMR multi-layer. The TMR multi-layer includes a tunnel barrier layer having a three-layered structure of a first crystalline layer, a crystalline semiconductor layer and a second crystalline insulation layer stacked in this order.Type: ApplicationFiled: January 12, 2007Publication date: July 17, 2008Inventors: Kei Hirata, Satoshi Miura
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Publication number: 20080170338Abstract: A method and calculator for obtaining spin polarized quantum transport in 3-dimensional atom-scale spintronic (spin electronics) devices under finite bias voltage, based on implementing Density Function Theory (DFT) in combination with the Keldysh non-equilibrium Greens function (NEGF) formalism to calculate spin polarized quantum transport in 3-dimensional nanostructures under finite bias and external voltage.Type: ApplicationFiled: January 16, 2008Publication date: July 17, 2008Inventors: Hong Guo, Derek Waldron, Brian Larade