Patent application number | Description | Published |
20100149696 | MAGNETIC SENSOR INCLUDING AN ELEMENT FOR GENERATING SIGNALS RELATED TO RESISTANCE CHANGES - A magnetic device includes first and second electrodes and a sensor stack connected to the first and second electrodes proximate a sensing surface of the magnetic sensor. A resistive element is connected to the first and second electrodes in parallel or in series with the sensor stack and adjacent the sensing surface. In some embodiments, the resistive element is configured to generate signals related to changes in its resistance. A controller to respond to the resistive element signals can also be included. | 06-17-2010 |
20140055884 | MAGNETIC STACK WITH SEPARATED CONTACTS - An apparatus for two dimensional reading may be constructed, in accordance with some embodiments, with a number of magnetic stacks respectively configured to engage adjacent data tracks of a data storage media. Each magnetic stack can be disposed between top and bottom shields while each shield is segmented into a number of contacts different than the number of magnetic stacks. | 02-27-2014 |
20140106183 | MAGNETIC READER WITH TUNED ANISOTROPY - Various embodiments may be generally directed to a stack capable of reading magnetic data bits. Such a stack can have a non-magnetic spacer layer disposed between a magnetically free layer and a synthetic antiferromagnet (SAF) where the SAF is configured with an anisotropy tuned to a non-normal direction with respect to an air bearing surface (ABS). | 04-17-2014 |
20140146418 | SIDE SHIELD BIASING LAYER SEPARATED FROM AN AIR BEARING SURFACE - Various embodiments may configure a data storage device with at least a magnetic element having a magnetic stack that is configured with an air bearing surface (ABS) and is separated from a side shield. The side shield can be biased by a biasing layer that contacts the side shield and is separated from the ABS. | 05-29-2014 |
20140153137 | Magnetic Element with Coupled Side Shield - A magnetic element may be constructed in accordance with various embodiments as a data reader. The magnetic element can have at least a magnetic reader that contacts a top shield and is separated from a side shield on an air bearing surface (ABS). The side shield may be antiferromagnetically coupled to the top shield via a coupling layer disposed between the top and side shields. | 06-05-2014 |
20140160596 | DATA STORAGE DEVICE WITH VARIABLE ANISOTROPY SIDE SHIELD - Various embodiments may be generally directed to a data storage device with at least a magnetic element having a magnetic stack positioned adjacent to and separated from at least one side shield on an air bearing surface (ABS). The side shield can be configured with a predetermined anisotropy variation along a down-track direction. | 06-12-2014 |
20140168818 | READ SENSOR FOR RECORDING HEAD - Implementations described and claimed herein provide a read sensor structure having a synthetic anti-ferromagnetic (SAF) structure with a pinning that is canted with respect to an air bearing surface (ABS) of the read sensor. In an implementation of the read sensor, the angle between the pinning direction of a reference layer (RL) and the pinning direction of a free layer (FL) is obtuse. | 06-19-2014 |
20140218823 | Magnetic Element With A Bi-Layer Side Shield - A magnetic element is generally provided that can be implemented as a data reader. Various embodiments may connect a magnetic stack to a top shield and separate the magnetic stack from a bi-layer side shield. The bi-layer side shield may have a fixed magnetization layer and a soft magnetic layer each magnetically isolated from the top shield. | 08-07-2014 |
20140218825 | SIDE SHIELD PEDESTAL FOR DATA READERS - Various embodiments may be generally directed to a magnetic element capable of reading magnetic data bits. Such a magnetic element may have at least a magnetic stack laterally adjacent a side shield and non-magnetic pedestal on an air bearing surface (ABS). The non-magnetic pedestal can be configured to have a greater stripe height from the ABS than the side shield. | 08-07-2014 |
20140327989 | Side Shield Biasing Layer Separated from an Air Bearing Surface - Various embodiments may configure a data storage device with at least a magnetic element having a magnetic stack that is configured with an air bearing surface (ABS) and is separated from a side shield. The side shield can be biased by a biasing layer that contacts the side shield and is separated from the ABS. | 11-06-2014 |
Patent application number | Description | Published |
20140254047 | READER WITH DECOUPLED MAGNETIC SEED LAYER - An apparatus comprising a base shield and a sensor stack, wherein the base shield is separated from the sensor stack via a first soft magnetic layer that is magnetically decoupled form the base shield. | 09-11-2014 |
20140340793 | MAGNETORESISTIVE SENSOR - Implementations disclosed herein allow a signal detected by a magnetoresistive (MR) sensor to be improved by providing for one or more regions of reduced anisotropy proximal to a sensor stack within a shielding structure. | 11-20-2014 |
20150036245 | MAGNETORESISTIVE SENSOR - An apparatus disclosed herein comprises a magnetically free layer and a bottom shield, wherein a first portion of the bottom shield substantially adjacent the free layer is pinned perpendicular to an air-bearing surface (ABS) of the apparatus and a second portion of the bottom shield not substantially adjacent the free layer is pinned parallel to the ABS of the apparatus. | 02-05-2015 |
20150055251 | READER STRUCTURE - An apparatus disclosed herein includes a sensor with a free layer having cross-track easy axis anisotropy. | 02-26-2015 |
20150062735 | DUAL READER STRUCTURE - Implementations described and claimed herein provide a stacked dual reader with a bottom sensor stack and a top sensor stack wherein the bottom sensor stack and the top sensor stack are mirrored along a down-track direction. | 03-05-2015 |
20150062755 | DUAL READER STRUCTURE - Implementations described and claimed herein provide a dual reader wherein a bottom shield is attached to side shields. | 03-05-2015 |
20150213815 | SYNTHETIC ANTIFERROMAGNETIC READER - Implementations disclosed herein provide for an apparatus, comprising a synthetic antiferromagnetic reader structure, wherein total moment of a pinned layer is substantially greater than total moment of a reference layer. In one implementation, the pinning strength of the pinned layer is substantially reduced. | 07-30-2015 |
20150371670 | DUAL READER STRUCTURE - Implementations described and claimed herein provide a stacked dual reader with a bottom sensor stack and a top sensor stack separated by a top mid-shield and a bottom mid-shield, and a pre-amplifier circuit comprising a top lead connected to the top mid-shield, configured to collect current flowing from the top mid-shield through the top sensor stack opposite a direction of current flowing from the bottom mid-shield to a bottom lead through the bottom sensor stack. | 12-24-2015 |
Patent application number | Description | Published |
20100067701 | Method and System for High Rate Uncorrelated Shared Secret Bit Extraction From Wireless Link Characteristics - A new methodology to exchange a random secret key between two parties. The diverse physical characteristics of the wireless medium and device mobility are exploited for secure key exchange. Unique physical characteristics of wireless channels between the two devices are measured at different random locations. A function of these unique characteristics determines the shared secret key between the two devices. | 03-18-2010 |
20100207732 | Robust Location Distinction Using Temporal Link Signatures - The ability of a receiver to determine when a transmitter has changed location is important for energy conservation in wireless sensor networks, for physical security of radio tagged objects, and for wireless network security in detection of replication attacks. In embodiments of the present invention, a measured temporal link signature is determined to uniquely identify the link between a transmitter and a receiver. The temporal link signature is an impulse response of a transmitted signal from the transmitter over a channel between the transmitter and a receiver over a channel. When the transmitter changes location, or if an attacker at a different location assumes the identity of the transmitter, the proposed link distinction methodology reliably detects the change in the physical channel. This detection can be performed at a single receiver or collaboratively by multiple receivers. | 08-19-2010 |
20110273321 | Method and System for Tracking Objects Using Radio Tomographic Imaging - New systems and methodologies that use radio tomography for object tracking. | 11-10-2011 |
20120009882 | Statistical Inversion Method and System for Device-Free Localization in RF Sensor Networks - A new methodology for detecting, localizing, tracking, and counting objects. The method for state/space estimation includes arranging in a space a first pair of radio frequency sensors in a network of nodes. The first pair of radio frequency sensors is calibrated to determine a first fading condition associated with the first pair of radio frequency sensors. A signal strength of at least one signal sent between the first pair of nodes is measured. A first likelihood model is determined based on the first fading condition. A first posterior distribution is estimated based on the signal strength of the at least one signal using the first likelihood model for purposes of determining object information within the space. | 01-12-2012 |
Patent application number | Description | Published |
20120146788 | SYSTEMS AND METHODS OF DEVICE-FREE MOTION DETECTION AND PRESENCE DETECTION - Systems and methods are provided for device-free motion detection and presence detection within an area of interest. A plurality of nodes, configured to be arranged around the area of interest, form a wireless network. The plurality of nodes transmit wireless signals as radio waves and receive transmitted wireless signals. The received signal strength (RSS) of the transmitted wireless signals between the plurality of nodes are measured and a value is reported. A computing device receives the reported values for the measured RSS and tracks the reported values over time. The computing device processes the reported values using an aggregate disturbance calculation to detect motion and presence within the area of interest. The computing device may notify notification device of a detected disturbance within the area of interest. | 06-14-2012 |
20140200856 | SYSTEMS AND METHODS OF DEVICE-FREE MOTION DETECTION AND PRESENCE SENSING - Systems and methods are provided for device-free motion detection and presence detection within an area of interest. A plurality of nodes, configured to be arranged around the area of interest, form a wireless network. The plurality of nodes transmit wireless signals as radio waves and receive transmitted wireless signals. The received signal strength (RSS) of the transmitted wireless signals between the plurality of nodes are measured and a value is reported. A computing device receives the reported values for the measured RSS and tracks the reported values over time. The computing device processes the reported values using an aggregate disturbance calculation to detect motion and presence within the area of interest. The computing device may notify notification device of a detected disturbance within the area of interest. | 07-17-2014 |
20140313913 | MONITORING BREATHING VIA SIGNAL STRENGTH IN WIRELESS NETWORKS - Systems and methods are disclosed for the use of sensor links in a network to estimate the breathing rate of a breathing subject within a structure, estimate the location of the subject within the structure, and detect if the subject is breathing. The structure may be a bed, a building, or a room in the building. The received signal strength of the sensor links is obtained and is then used in various breathing models to determine the breathing rate estimation, the location estimation, and the breathing detection. | 10-23-2014 |