Patents Assigned to Quantum
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Patent number: 7269687Abstract: Systems and methods for storing data on a tape medium and coping with defective regions on the tape medium are provided. The method includes: writing a plurality of envelopes of data onto the tape medium, each envelope of data comprising a plurality of blocks of data; detecting a defective region of the tape medium; writing a boundary start field after the defective region, the boundary start field indicating that the defective region has been passed; and writing a boundary end field before the defective region of the tape medium, the boundary end field indicating that the defective region follows the boundary end field.Type: GrantFiled: August 20, 2004Date of Patent: September 11, 2007Assignee: Quantum CorporationInventors: Dwayne A. Edling, Charles Klomp
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Patent number: 7267893Abstract: An optical multilayer film includes: a first layer; a second layer that contains titanium oxynitride as a main component; and a third layer that contains magnesium fluoride as a main component; the first layer that has a different refractive index from that of the second layer or the third layer; and the first layer, the second layer, and the third layer being part of a laminated structure that includes a plurality of reflection planes. The thickness of the third layer is smaller than ΒΌ wavelength.Type: GrantFiled: August 27, 2003Date of Patent: September 11, 2007Assignee: Fujitsu Quantum Devices LimitedInventors: Nobumasa Okada, Tadahiro Hiraike
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Patent number: 7265006Abstract: A method of fabricating heterojunction devices, in which heterojunction devices are epitaxially formed on active area regions surrounded by field oxide regions and containing embedded semiconductor wells. The epitaxial growth of the heterojunction device layers may be selective or not and the epitaxial layer may be formed so as to contact individually each one of a plurality of heterojunction devices or contact a plurality of heterojunction devices in parallel. This method can be used to fabricate three-terminal devices and vertically stacked devices.Type: GrantFiled: July 7, 2005Date of Patent: September 4, 2007Assignee: Quantum Semiconductor LLCInventors: Carlos J.R.P. Augusto, Lynn Forester
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Patent number: 7255297Abstract: Tape drives and methods of operating tape drives are provided. The tape drive may include: a first reel motor for rotating a first reel having a data storage tape medium wound about the first reel; a data transfer head; a second reel motor for rotating a second reel to draw the tape medium from the first reel, across the data transfer head, and onto the second reel; and at least one adaptive bearing for guiding the tape medium between the first reel and the second reel, the adaptive bearing including a roller having a first rotational resistance as the tape medium travels past the adaptive bearing at a first linear velocity and having a second rotational resistance greater than the first rotational resistance when the tape medium travels past the adaptive bearing at a second linear velocity greater than the first linear velocity.Type: GrantFiled: June 4, 2004Date of Patent: August 14, 2007Assignee: Quantum CorporationInventor: George A. Saliba
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Patent number: 7255908Abstract: A magnetic tape (1) characterized by having a backcoating layer (5) which comprises a binder and fine particles having been dispersed in the binder and being capable of irreversibly changing in color on oxidation reaction, and has a sufficient number of microvoids of sufficient size to supply sufficient oxygen to cause the oxidation reaction.Type: GrantFiled: October 14, 2003Date of Patent: August 14, 2007Assignee: Quantum CorporationInventors: Akira Ishikawa, Takashi Ishii, Mitsuhiro Katashima, Manabu Hosoya, Tomohiko Onda
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Patent number: 7256963Abstract: In one aspect, an exemplary method of manufacturing a magnetic head assembly is provided. In one example, the method includes forming islands in a magnetic head structure to define a pair of mini-outriggers adjacent a data island, where the data island is separated from each mini-outrigger by a void, and a width of the data island along a direction of tape transport is greater than a width of the mini-outrigger. The method further includes lapping the head structure to remove a portion of the mini-outrigger, thereby creating a wrap angle between the tape and the surface of the data island. In one example, the lapping process reduces the mini-outrigger height relative to the data island in an adaptive manner, where the final contour and height of the mini-outrigger is influenced by the data island surface, e.g., by the width, radius of curvature, and the like.Type: GrantFiled: September 16, 2004Date of Patent: August 14, 2007Assignee: Quantum CorporationInventor: George A. Saliba
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Patent number: 7253513Abstract: A switch device includes a semiconductor chip, and at least two switches formed on the semiconductor chip. Ground parts of the at least two switches are arranged between said at least two switches.Type: GrantFiled: March 26, 2003Date of Patent: August 7, 2007Assignee: Fujitsu Quantum Devices LimitedInventor: Naoyuki Miyazawa
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Patent number: 7253365Abstract: A die carrier for holding a die, such as a microdisplay die, may be electrically connected to a substrate by pressing the substrate against flexible, resilient leads of the die carrier. The package includes a housing and a shroud mounted to the housing. The substrate is inserted through a slot in the shroud and, within the shroud, engages against the flexible, resilient leads, thereby establishing an electrical contact.Type: GrantFiled: June 29, 2004Date of Patent: August 7, 2007Assignee: Quantum Leap Packaging, Inc.Inventors: Stanford W. Crane, Jr., Myoung-soo Jeon, Charley Takeshi Ogata
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Publication number: 20070177303Abstract: A cleaning apparatus for cleaning a media drive transducer head is provided. In one example, the apparatus includes a cleaning member (e.g., a brush having a plurality of bristles) and an actuator assembly operable to move the cleaning member from a position vertically offset from a drive head to a position engaging the drive head, the vertical direction being perpendicular to the direction of tape transport adjacent the drive head. The apparatus may further include a displacement feature operable to engage a leader member (e.g., the drive leader or tape) and displace the leader member from the drive head.Type: ApplicationFiled: February 1, 2006Publication date: August 2, 2007Applicant: Quantum CorporationInventors: Stephen Stamm, Ray Chapman, Joe Jurneke
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Publication number: 20070171577Abstract: A high-frequency tape head actuator has a positioning coil mounted close to a tape read/write head and between two thin flexures, which are flexible in a plane of flexion but stiff in other planes. One end of each flexure is attached to a fine positioner that holds the coil and the tape head. The other end of each flexure is attached to a base, such as a coarse positioner, which moves in the plane of flexion transversely to the length of a magnetic tape to read and write data on the tape. The base includes a magnet, which produces a magnetic field to precisely move the fine positioner in the plane of flexion. The position of the coil close to the center of mass of the fine positioner allows the fine positioner to operate at high frequencies, thereby allowing increased tracking precision and greater data storage capacities.Type: ApplicationFiled: January 20, 2006Publication date: July 26, 2007Applicant: Quantum CorporationInventor: John Ycas
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Publication number: 20070170294Abstract: A data storage cartridge that uses a tape buckling mechanism to connect a reel of tape to a tape drive is enhanced with a buckle reinforcement feature on the cartridge door. The reinforcement feature fits between two buckle clips of the buckling mechanism, and provides reinforcing support to the buckle clips. The reinforcement feature supports the clips and thereby prevents bending and misalignment of the clips. If the clips do become bent or misaligned, the reinforcement feature prevents the door from closing completely. A user will clearly see that damage has occurred, and the user will be less likely to damage the drive by attempting to use the cartridge. Furthermore, the reinforcement feature can be wedge-shaped, so that the user may straighten the bent clips by applying additional force to the door.Type: ApplicationFiled: January 20, 2006Publication date: July 26, 2007Applicant: Quantum CorporationInventors: Kevin Fletcher, Michael Krasilinec
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Patent number: 7247960Abstract: A magnetic/encoder assembly has a compact design and combines the features of motor, encoder and chuck locating feature within a single motor housing. The motor/encoder includes a DC brushless motor with an inner magnetic rotor. The motor windings and the commutation electronics are mounted towards the bottom side of a printed circuit board. The rotor of the motor is extended above the surface of the printed circuit board. The extended rotor provides a precision seat for the magnetic wheel with multiple poles. The top surface of the printed circuit board mounts the sensor for the encoder. The extension of the rotor provides the precision mounting surface of the cartridge driving chuck.Type: GrantFiled: May 11, 2006Date of Patent: July 24, 2007Assignee: Quantum CorporationInventors: Ashok B. Nayak, Robert R. Heinze
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Patent number: 7247961Abstract: A magnetic/encoder assembly has a compact design and combines the features of motor, encoder and chuck locating feature within a single motor housing. The motor/encoder includes a DC brushless motor with an inner magnetic rotor. The motor windings and the commutation electronics are mounted towards the bottom side of a printed circuit board. The rotor of the motor is extended above the surface of the printed circuit board. The extended rotor provides a precision seat for the magnetic wheel with multiple poles. The top surface of the printed circuit board mounts the sensor for the encoder. The extension of the rotor provides the precision mounting surface of the cartridge driving chuck.Type: GrantFiled: May 11, 2006Date of Patent: July 24, 2007Assignee: Quantum CorporationInventors: Ashok B. Nayak, Robert R. Heinze
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Patent number: 7245956Abstract: A system for unobtrusively measuring bioelectric signals developed by an individual includes multiple sensors, one or more of which constitutes a capacitive sensor, embedded into or otherwise integrated into an object, such as a chair, bed or the like, used to support the individual. The object serves as mounting structure that holds the sensors in place. The sensors are preferably arranged in the form of an array, with particular ones of the sensors being selectable from the array for measuring the bioelectric signals which are transmitted, such as through a wireless link, for display and/or analysis purposes.Type: GrantFiled: August 17, 2004Date of Patent: July 17, 2007Assignee: Quantum Applied Science & Research, Inc.Inventors: Robert Matthews, Igor Fridman, Paul Hervieux
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Patent number: 7245453Abstract: Methods and systems for sensing a position of a transducer head with respect to a storage medium. One method includes generating a read signal from a servo track stored on a magnetic storage medium. The servo track includes servo frames of magnetic flux transitions forming detectable servo marks, the servo marks forming a tone field of repeating servo marks oriented at a first azimuth angle and a mid-frame synchronization mark incorporated within the tone field, wherein the tone field provides a metric reference for dimensional measurements between features within the servo frame(s). The number of servo marks in the tone field of each servo frame along a longitudinal direction of the servo track before the mid-frame synchronization mark and after the mid-frame synchronization mark varies with lateral position.Type: GrantFiled: November 20, 2006Date of Patent: July 17, 2007Assignee: Quantum CorporationInventors: John A. Koski, Timothy C. Hughes
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Publication number: 20070159345Abstract: The present disclosure provides an alternative, cost-effective safety feature for on-board hydrogen storage containers incorporating a fill cycle sensor with a driver warning and shutdown system. The system monitors the number of times a hydrogen container is filled, and then takes action at a predetermined termination point. A controller monitors each time the hydrogen container is filled above 90% of the rated pressure or mass. Once the predetermined termination point of fill cycles is reached, the disclosed device/method will either disable the valve or refueling mechanism such that fuel supply to the vehicle is shutoff and the container cannot be filled again, essentially assuring the end of the life of the container.Type: ApplicationFiled: December 21, 2006Publication date: July 12, 2007Applicant: QUANTUM FUEL SYSTEMS TECHNOLOGIES WORLDWIDE, INC.Inventors: NEEL SIROSH, ROBERT MILLER, TONY STAPLES
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Publication number: 20070161220Abstract: A semiconductor device has: a semiconductor substrate having a pair of current input/output regions via which current flows; an insulating film formed on the semiconductor substrate and having a gate electrode opening; and a mushroom gate electrode structure formed on the semiconductor substrate via the gate electrode opening, the mushroom gate electrode structure having a stem and a head formed on the stem, the stem having a limited size on the semiconductor substrate along a current direction and having a forward taper shape upwardly and monotonically increasing the size along the current direction, the head having a size expanded stepwise along the current direction, and the stem contacting the semiconductor substrate in the gate electrode opening and riding the insulating film near at a position of at least one of opposite ends of the stem along the current direction.Type: ApplicationFiled: March 5, 2007Publication date: July 12, 2007Applicants: FUJITSU LIMITED, FUJITSU QUANTUM DEVICES LIMITEDInventors: Kozo Makiyama, Naoya Ikechi, Takahiro Tan
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Patent number: 7242549Abstract: A media cartridge autoloader is disclosed which includes a media cartridge picker having a turntable capable of supporting a media cartridge and rotating to change the orientation of the media cartridge. A turntable rotating mechanism configured to rotate the turntable and a media cartridge transport mechanism configured to transport the media cartridge onto and off of the turntable are provided on the turntable. A mail slot through which the media cartridge is inserted or ejected, a media drive into which the media cartridge is loaded, and a media cartridge storage section configured to store the media cartridge are provided. The mail slot, the media drive, and the media cartridge storage section are arranged around the media cartridge picker. The media cartridge picker includes a turntable lifting mechanism that raises and lowers the turntable.Type: GrantFiled: November 16, 2005Date of Patent: July 10, 2007Assignees: Mitsumi Electric Co., Ltd., Quantum CorporationInventors: Tomoaki Sakaguchi, Peter A. Johnson
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Patent number: D546562Type: GrantFiled: February 23, 2006Date of Patent: July 17, 2007Assignee: The Quantum Group, Inc.Inventor: J. Michael Davis
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Patent number: D546563Type: GrantFiled: February 23, 2006Date of Patent: July 17, 2007Assignee: The Quantum Group, Inc.Inventor: J. Michael Davis
