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7744results about "Magnetic recording" patented technology

Magnetic data recording device

A Q-Chip MEMS magnetic device comprises a thin-film electronic circuit for implantation in the Track-2 area of a magnetic stripe on the back of a credit card. The Q-Chip MEMS magnetic device periodically self-generates new sub-sets of magnetic data that are to be read in combination with other magnetic data that is permanently recorded in the surrounding surface of the magnetic stripe. A collocated battery and microcontroller provide operating power and new data for magnetic bit updates. A swipe sensor triggers such updates by sensing electrical contact with a legacy card reader. Several thin-film coils of wire are wound end-to-end around a common, flat, ferrous core. These are driven by the microcontroller. In one instance, such core comprises “hard” magnetic material with a coercivity of 200-300 Oersteds. Magnetic data written from the corresponding adjacent coils will persist for later readings by a legacy card reader. In another instance, the core comprises “soft” magnetic material with a coercivity of about one Oersted. A media stripe of “hard” magnetic film material overlays respective coils to receive magnetic data transfers. Magnetic data written from the corresponding adjacent coils will persist in the overlaying hard media for later readings by a legacy card reader. In a data input mode, the thin-film coils can be used as readers to provide updates and new programming to the microcontroller.
Owner:FITBIT INC

Adhesive microstructure and method of forming same

A fabricated microstructure comprising at least one protrusion capable of providing an adhesive force at a surface of between about 60 and 2,000 nano-Newtons. A stalk supports the protrusion at an oblique angle relative to a supporting surface. The microstructure can adhere to different surfaces.
Owner:RGT UNIV OF CALIFORNIA

Moisture barrier coatings

A barrier assembly having a flexible or rigid substrate overcoated with an all polymer multilayer stack. A multilayer on the substrate includes alternating diamond-like glass or carbon layers with polymer layers. Another multilayer includes alternating polymer layers using different types of polymers. The barrier layers can be used to mount, cover, encapsulate or form composite assemblies for protection of moisture or oxygen sensitive articles
Owner:3M INNOVATIVE PROPERTIES CO

Chemical manufacture of nanostructured materials

A low temperature chemical route to efficiently produce nanomaterials is described. The nanomaterials are synthesized by intercalating ions into layered compounds, exfoliating to create individual layers and then sonicating to produce nanotubes, nanorods, nanoscrolls and / or nanosheets. It is applicable to various different layered inorganic compounds (for example, bismuth selenides / tellurides, graphite, and other metal complexes, particularly transition metal dichalcogenides compounds including oxygen, sulfur, tellurium or selenium).
Owner:RGT UNIV OF CALIFORNIA

Activatable material

InactiveUS6846559B2Assist in flow controlPreventing fatigue crack growthSynthetic resin layered productsRecord information storageEpoxyElastomer
An activatable (e.g., heat expandable) material and articles incorporating the same is disclosed. The material includes an epoxy resin; an epoxy / elastomer hybrid or reaction product; a blowing agent; a curing agent; and optionally, a filler. In preferred embodiments, the material includes aramid fiber, nanoclay or both.
Owner:ZEPHYROS INC

Doubled-sided and multi-layered PCD and PCBN abrasive articles

A doubled-sided PCD or PCBN compact as well as a new multi-layered PCD and PCBN can be produced using high pressure high temperature processes allowing for increased effective thickness of abrasive tools. A polycrystalline compact can include a substrate having a first surface and a second surface which are non-contiguous. Additionally, a first polycrystalline layer can be attached to the first surface of the substrate and a second polycrystalline layer attached to the second surface of the substrate. The first and second polycrystalline layers can include superabrasive particles bonded together by sintering or chemical bonding with an additional metal. Such double-sided PCD and PCBN compacts as well as a new multiple layered PCD and PCBN allow for increased effective thickness of a tool without suffering from non-homogenous results typical of standard PCD and PCBN compacts, regardless of superabrasive particle size. Each polycrystalline layer can include superabrasive particles of varying particle sizes such that the final tool is tailored for specific abrading characteristics. Such doubled-sided and / or multiple layered PCD and PCBN compacts can be incorporated into a wide variety of abrasive tools for use in cutting, milling, grinding, polishing, drilling and other similar abrasive applications.
Owner:CHO HYUN SAM +2

Method and system for providing an energy assisted magnetic recording writer having a ring shaped NFT

A method and system provides an EAMR transducer. The transducer is coupled with a laser for providing energy and has an air-bearing surface (ABS) configured to reside in proximity to a media during use. The EAMR transducer includes a near field transducer (NFT) for focusing the energy onto the region of the media, a write pole, and at least one coil for energizing the write pole. The NFT includes a ring portion having an aperture therein and a pin portion proximate to the ABS. The write pole is configured to write to a region of the media.
Owner:WESTERN DIGITAL TECH INC

Four pad self-calibrating electronic lapping guide

Lapping guides for use in fabrication of a magnetic recording head are provided. The lapping guides comprise a first differential electronic lapping guide (ELG) disposed in a first layer of the magnetic recording head. The first differential ELG has a first resistive element and a second resistive element between which is disposed a first common electrical lead. The lapping guides further comprise a second differential ELG disposed in a second layer of the magnetic recording head. The second differential ELG has a third resistive element and a fourth resistive element between which is disposed a second common electrical lead. The first and second differential ELGs share a common ground and a common current injection source. Remaining lapping distances at the first and second layers of the magnetic recording head are determined by measuring changing voltages across the first, second, third and fourth resistive elements, respectively.
Owner:WESTERN DIGITAL TECH INC
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