Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 7576948 | Magnetic field read sensor based on the extraordinary hall effect A magnetic field sensor includes a metallic bar coupled to a substrate. Current leads are adapted to provide current to the ferromagnetic bar. Voltage leads are coupled to the ferromagnetic bar to sense an induced Hall voltage therein. ... | 08/18/2009 |
| 7463447 | Magnetic thin film sensor based on the extraordinary Hall effect A magnetic field sensor, including an insulating substrate and a conductive thin film deposited on the substrate. The thin film consists of a material having an extraordinary Hall coefficient, the thin film also has a resistivity and a film thickness no greater. tha... | 12/09/2008 |
| 7440227 | Magnetic head having a hall effect sensor and circuit for detecting recorded bits from magnetic recording media A magnetic head has a sensor which employs the “Hall effect”. In one illustrative example, the sensor includes a generally planar body made of a semiconductor heterostructure; first and second contacts comprising first and second drains, respectively, which are ... | 10/21/2008 |
| 7366011 | Power consumption minimization in magnetic random access memory by using the effect of hole-mediated ferromagnetism A low-power memory device that uses hole-mediated ferromagnetism creates substantial advantages over conventional systems. Some of these advantages include reducing power consumption by several orders of magnitude and facilitating wireless monitoring of memory cells... | 04/29/2008 |
| 7355813 | Method of fabricating a narrow projection such as a write pole extending from a substrate An article is formed as a substrate having a projection extending outwardly therefrom. The article may be a magnetic recording head and the projection a write pole. The projection has a width in a thinnest dimension measured parallel to a substrate surface of no mor... | 04/08/2008 |
| 7333361 | Biosensor and sensing cell array using the same A biosensor and a sensing cell array using a biosensor are disclosed. Adjacent materials containing a plurality of different ingredients are analyzed to determine the ingredients based on their magnetic susceptibility or dielectric constant. A sensing cell array inc... | 02/19/2008 |
| 7324309 | Cross-track shielding in a GMR head A magnetoresistive read/write head includes an integral top and side shields deposited on top of and substantially surrounding the multiple layers of the MR sensor stack. Such a design is particularly advantageous in CPP designs in which the only spacing necessary b... | 01/29/2008 |
| 7295401 | Laminated side shield for perpendicular write head for improved performance A perpendicular write head is disclosed for writing information onto tracks. The write head includes a top pole and a return pole and side shields with laminated layers wherein said laminated layers have magnetization in a direction parallel to an air bearing surfac... | 11/13/2007 |
| 7274080 | MgO-based tunnel spin injectors A MgO tunnel barrier is sandwiched between semiconductor material on one side and a ferri- and/or ferromagnetic material on the other side to form a spintronic element. The semiconductor material may include GaAs, for example. The spintronic element may be used as a... | 09/25/2007 |
| 7257018 | Method and apparatus for a low write current MRAM having a write magnet An invention is provided for a low write current MRAM. Each MRAM cell includes a word line and a bit line. A magnetic device is disposed at the intersection of the word line and the bit line. Disposed at either end of the magnetic device is a writing magnet. The pai... | 08/14/2007 |
| 7253995 | Magnetic head and magnetic recording/reproducing device A magnetic head includes a first electrode layer, a first ferromagnetic electrode pair that is electrically connected to the first electrode layer, and a second ferromagnetic electrode pair that intersects with a current which flows between the first ferromagnetic e... | 08/07/2007 |
| 7227173 | Semiconductor devices and methods A method of forming a semiconductor device includes the following steps: providing a plurality of semiconductor layers; providing means for coupling signals to and/or from layers of the device; providing a quantum well disposed between adjacent layers of the device;... | 06/05/2007 |
| 7227774 | MRAM integrated circuits, MRAM circuits, and systems for testing MRAM integrated circuits An integrated circuit includes operational circuitry; a sensor configured to sense an environmental parameter; and adjustment circuitry coupled to the sensor and to the operational circuitry and configured to affect the operational circuitry to at least partially co... | 06/05/2007 |
| 7221538 | Thin film perpendicular magnetic recording head, their fabrication process and magnetic disk drive using it Thin film perpendicular magnetic head with a narrow main pole capable of a high recording density in excess of 100 gigabits per square inch and generating a high magnetic recording field exceeding 10 kOe while suppressing remanent magnetic fields occurring immediate... | 05/22/2007 |
| 7199391 | Device with quantum dot layer spaced from delta doped layer A method of forming a semiconductor device includes the following steps: providing a plurality of semiconductor layers; providing means for coupling signals to and/or from layers of the device; providing a layer of quantum dots disposed between adjacent layers of th... | 04/03/2007 |
| 7158353 | Magnetoresistive sensor having specular sidewall layers A transducing head includes a multilayered magnetoresistive sensor having an air bearing sidewall opposite aback sidewall and a first sidewall opposite a second sidewall. A specular layer is positioned on at least one of the air bearing sidewall, the back sidewall, ... | 01/02/2007 |
| 7145750 | Perpendicular magnetic recording head and perpendicular magnetic recording and reproducing system There is provided a perpendicular magnetic recording and reproducing system in which the overwrite erase ratio of a perpendicular magnetic head has been improved to prevent the deterioration of an overwrite property. In the perpendicular magnetic head, a third magne... | 12/05/2006 |
| 7145330 | Scanning magnetic microscope having improved magnetic sensor A scanning magnetic microscope SMM (20) includes a sensor (10) for sensing a magnetic field generated by a specimen (78), the sensor including one of a MTJ, a GMR, or an EHE sensor; translation apparatus (22A–C, 52) for translati... | 12/05/2006 |
| 7119538 | Offset-reduced hall sensor A technique for determining an offset-reduced Hall voltage (Uh), and/or an offset voltage (UH, offset) of a Hall sensor (1) includes applying a Hall sensor current (I) at first and second taps (a1, a2, a3) of the Hall sensor (1), a... | 10/10/2006 |
| 7110216 | Magnetic thin film sensor based on the extraordinary hall effect A magnetic field sensor, including an insulating substrate and a conductive thin film deposited on the substrate. The thin film consists of a material having an extraordinary Hall coefficient, the thin film also has a resistivity and a film thickness no greater than... | 09/19/2006 |
| 7106554 | Perpendicular magnetic writer with magnetic potential control shield Conventional perpendicular writers that utilize an extended return pole are subject to large undershoot fields. This problem has been reduced by replacing the prior art extended return pole by one whose magnetic potential has been increased relative to both the main... | 09/12/2006 |
| 7106233 | Integrated galvanomagnetic sensor array system Galvanomagnetic sensor array system and method for providing data interface to a basic sensor array are provided. The sensor system includes an array of galvanomagnetic elements, and a processor coupled to receive each output signal from the array of galvanomagnetic... | 09/12/2006 |
| 7092217 | Magnetoresistive head A magnetoresistive head of CPP structure in which an insulating protective film 20 covers at least part of the boundary between the lower shield layer 10 and the non-magnetic film 11 adjacent thereto so as to reduce the area of the lower shield ... | 08/15/2006 |
| 7085109 | Spin valve type transducer capable of reducing reproducing gap In a spin value type transducer including two magnetic shield layers, a patterned magnetoresistance element is in direct contact with one of the magnetic shield layers. A permanent magnet layer and an electrode layer are formed on the sides of the patterned magnetor... | 08/01/2006 |
| 7061311 | Differential amplifier for dual bridge transducer A plurality of bridge transducers are provided in a dual arrangement. An output terminal from each transducer is coupled to differential inputs of an amplifier. Each of the other outputs from the transducers are respectively coupled together and used to control a bi... | 06/13/2006 |
| 7061062 | Integrated circuit with unified input device, microprocessor and display systems An integrated circuit having at least one micromechanical element thereon is described comprising a support substrate, a sensor element electrically connected to a logic circuit, and the logic circuit electrically connected to a semiconductor visual display element.... | 06/13/2006 |
| 7042682 | Fully shielded perpendicular recoding writer Conventional perpendicular writers that utilize an extended return pole are subject to large flux leakage. This problem has been reduced in the prior art by adding a downstream shield. This still leaves significant upstream leakage. This has now been eliminated by a... | 05/09/2006 |
| 7031121 | Perpendicular recording magnetic head with a write shield magnetically coupled to a first pole piece A perpendicular recording write head has ferromagnetic first and second pole pieces which are connected at a back gap and an insulation stack with a write coil layer embedded therein is located between the first and second pole pieces and between a head surface of t... | 04/18/2006 |
| 7031110 | Thin film magnetic head, magnetic head device and magnetic recording/reproducing device A first magnetic film includes a first pole piece, and a second magnetic film includes a second magnetic piece. A gap film is disposed between the first pole piece and the second pole piece. The first magnetic film and the second magnetic film are magnetically joine... | 04/18/2006 |
| 7016094 | Nonvolatile solid state electro-optic modulator Perovskite materials having magnetoresistive effect under the influence of an electric field can be employed in the construction of nonvolatile solid state electro-optic modulator. These materials display nonvolatile changes in electrical resistance and reactant whe... | 03/21/2006 |
| 7015557 | Hall element with segmented field plate A Hall element is provided with a segmented field plate. Dynamic bias control is applied to the segments of the field plate. In one embodiment, a feedback signal is derived from an amplified output of the Hall element. The feedback signal is applied to the segments ... | 03/21/2006 |
| 7005915 | Series bridge circuit with amplifiers Two bridge type transducers are coupled in series with their outputs each driving one of a pair of differential amplifiers, with the outputs tied together in a push-pull configuration. In further embodiments, push-pull operation is obtained by matching amplifier gai... | 02/28/2006 |
| 6950289 | Embedded lapping guide for a magnetic head cluster A magnetic head cluster is provided along with a method of making a magnetic head cluster. The magnetic head cluster comprises a substrate having a plurality of magnetoresistive (MR) read and inductive magnetic write transducers and a plurality of terminals formed t... | 09/27/2005 |
| 6937434 | Magnetic field sensor utilizing anomalous hall effect magnetic film A magnetic field sensor for sensing an applied magnetic field by utilizing a Hall effect. Used, as a sensor portion, are compound materials such as FeN showing a significant anomalous Hall effect, and materials containing magnetic properties such as a magnetic semic... | 08/30/2005 |
| 6927948 | Differential CPP GMR sensor with free layers separated by metal gap layer A differential current-perpendicular-to-the-plane (CPP) giant magnetoresistive (GMR) sensor is provided having nonmagnetic high conductivity leads to achieve low lead resistance. The differential CPP GMR sensor comprises a first spin valve (SV) sensor, a second SV s... | 08/09/2005 |
| 6791792 | Magnetic field sensor utilizing anomalous hall effect magnetic film A magnetic field sensor for sensing an applied magnetic field by utilizing a Hall effect. Used, as a sensor portion, are compound materials such as FeN showing a significant anomalous Hall effect, and materials containing magnetic properties such as a magnetic semic... | 09/14/2004 |
| 6542068 | Vertical hall effect sensor and a brushless electric motor having a vertical hall effect sensor A vertical Hall sensor includes a semiconductor crystal with three or more arm sections that are arranged at a uniform angle distance to each other. A central electrode and external current electrodes are arranged on the surface of the sensor, and a plura... | 04/01/2003 |
| 6439762 | Mainspring device and a winding protection structure A timepiece, whose hands move by mechanical energy of a mainspring transmitted through a wheel train, includes a winding-up portion for accumulating energy in the mainspring, an addition and subtraction wheel train driven by addition and subtraction of ac... | 08/27/2002 |
| 6267004 | Glide test head assembly with high take-off resolution A glide test head assembly optimized for glide avalanche testing. The glide test head assembly of the present invention includes air bearing surfaces formed with a negative crown, or slightly concave surface. The negative crown of the air bearing surfaces... | 07/31/2001 |
| 6195228 | Thin, horizontal-plane hall sensors for read-heads in magnetic recording Thin, horizontal-plane Hall sensors for read-head in magnetic recordings and methods for fabricating the sensor provide a novel sensor exhibiting high sensitivity and high spatial resolution.... | 02/27/2001 |
