124 results about "Flat interface" patented technology

A flat interface nerve electrode is provided along with a method for its use. The electrode provides a plurality of conductive elements embedded in a non-conductive cuff structure, which acts to gently and non-evasively redefine the geometry of a nerve through the application of a force so as to apply pressure to a nerve in a defined range, namely from 2 to 40 mmHG and more preferably from 15 to 30 mmHG and most preferably from 15 mmHG to 20 MMHG. This range is selected to minimize the reduction of blood flow within the tissue, which preferably is at least 70% of the initial value, more preferably 90% of the initial value. The cuff has an opening, which is elongated relative to the diameter of the nerve to which it is applied. Preferably, the cuff is constructed from an elastic bio-compatible material having top and bottom beam members configured to define a nerve opening. The cuff is open at one side and has a connection at the other side which results in a spring force being applied through the surfaces of the nerve opening to the subject nerve. During implantation the open sides of the cuff are closed so as to capture the nerve in the cuff. As the nerve is reshaped, specific nerve axons become more easily addressed through the epineurium by the embedded conductive elements.

A polycrystalline diamond abrasive element, particularly a cutting element, comprises a table of polycrystalline diamond bonded to a substrate, particularly a cemented carbide substrate, along a non-planar interface. The non-planar interface typically has a cruciform configuration. The polycrystalline diamond has a high wear-resistance, and has a region adjacent the working surface lean in catalysing material and a region rich in catalysing material. The region lean in catalysing material extends to a depth of 40 to 90 microns, which is much shallower than in the prior art. Notwithstanding the shallow region lean in catalysing material, the polycrystalline diamond cutters have a wear resistance, impact strength and cutter life comparable to that of prior art cutter, but requiring only 20% of the treatment times of the prior art cutters.

A cutter for a drill bit used for drilling wells in a geological formation includes an ultra hard working surface and a chamfer along an edge of the working surface, wherein the chamfer has a varied geometry along the edge. The average geometry of the chamfer varies with cutting depth. A depression in the shaped working surface is oriented with the varied chamfer and facilitates forming the varied chamfer. A non-planar interface has depressions oriented with depressions in the shaped working surface to provide support to loads on the working surface of the cutter when used.

A composite structure includes a first portion comprising a first metallic material, a monolayer of particles extending into and bonded with the first portion, and a second portion comprising a second material, the second portion bonded with the monolayer of particles and extending into interstices between the particles. A method for fabricating a composite structure includes bonding a monolayer of particles to a first portion comprising a first metallic material, such that the monolayer of particles extends into the first portion and bonding a second portion comprising a second material to the monolayer of particles, such that the second portion extends into interstices between the particles.

A flat interface nerve electrode provides a plurality of electrical contacts embedded in a non-conductive cuff structure, which acts to gently and non-evasively redefine the geometry of a nerve through the application of a force acting on the nerve without causing damage to the nerve. The cuff is open at one side and has a connection to a lead at the other side. During implantation the open sides of the cuff are closed so as to capture the nerve in the cuff in a single motion.

Thermally stable polycrystalline constructions comprise a diamond body joined with a substrate, and may have a nonplanar interface. The construction may include an interlayer interposed between the diamond body and substrate. The diamond body preferably has a thickness greater than about 1.5 mm, and comprises a matrix phase of bonded together diamond crystals and interstitial regions disposed therebetween that are substantially free of a catalyst material used to sinter the diamond body. A replacement material is disposed within the interstitial regions. A population of the interstitial regions may include non-solvent catalyst material and/or an infiltrant aid disposed therein. The diamond body comprises two regions; namely, a first region comprising diamond grains that may be sized smaller than diamond grains in a second region, and/or the first region may comprise a diamond volume that is greater than that in the second region.

A reflection-type terahertz spectrometer includes an input optical path through which terahertz waves are propagated, an irradiating mechanism that irradiates a sample with terahertz waves propagated through the input optical path, an output optical path through which terahertz waves exiting from the irradiating mechanism are propagated, and a detector that receives and detects the terahertz waves propagated through the output optical path. The irradiating mechanism has at least one planar interface and a refractive index greater than that of a peripheral region contacting the planar interface and is disposed between the input optical path and the output optical path such that the terahertz waves propagated through the input optical path to be incident on the planar interface undergo total internal reflection at the planar interface, and the sample is disposed in the peripheral region contacting the planar interface of the irradiating mechanism. When the terahertz waves undergo the total internal reflection at the planar interface, the sample is irradiated with evanescent waves scattering from the planar interface to the peripheral region contacting the planar interface, so as to measure a spectrum.

In one aspect of the present invention, a high impact resistant tool has a superhard material bonded to a cemented metal carbide substrate at a non-planar interface. The cemented metal carbide substrate is bonded to a front end of a cemented metal carbide segment. A stem formed in the base end of the carbide segment opposite the front end is press fit into a bore of a steel body. The steel body is rotationally fixed to a drum adapted to rotate about its axis.

In one aspect of the present invention, a high impact wear resistant tool has a superhard material bonded to a cemented metal carbide substrate at a non-planar interface. The superhard material has a thickness of at least 0.100 inch and forms an included angle of 35 to 55 degrees. The superhard material has a plurality of substantially distinct diamond layers. Each layer of the plurality of layers has a different catalyzing material concentration. A diamond layer adjacent the substrate of the superhard material has a higher catalyzing material concentration than a diamond layer at a distal end of the superhard material.

The electrical and mechanical properties of structures such as lead frames and other electrical/electronic devices containing, during processing, copper/tin interfaces are improved by introduction of nickel to such interface. Typically, a weight percentage of nickel to tin in the range 1 to 12 weight percent yields upon melting of the tin, an intermetallic compound with essentially no occluded, unbound tin. Thus undesirable anomalous structures such as tin needles and substantially non-planar interface compositions are avoided. Advantageously a nickel/tin/copper intermetallic interface that is substantially planar is formed in the substantial absence of needle-like tin structures.

A high impact resistant pick in a holder having a super hard material bonded to a cemented metal carbide substrate at a non-planar interface. The cemented metal carbide substrate is bonded to a front end of a cemented metal carbide bolster. A bore is formed in a base end of the carbide bolster generally opposed to the front end. A steel shank being fitted into the bore of the bolster at a bolster end of the shank, and a portion of the shank is disposed within a bore of the holder at a holder end of the shank.

In one aspect of the invention, a tool has a wear-resistant base suitable for attachment to a driving mechanism and also a hard tip attached to an interfacial surface of the base. The tip has a first cemented metal carbide segment bonded to a superhard material at a non-planar interface. The tip has a height between 4 and 10 mm and also has a curved working surface opposite the interfacial surface. A volume of the superhard material is about 75% to 150% of a volume of the first cemented metal carbide segment.

The invention belongs to the technical field of semiconductor materials, and relates to a Ge/Si1-xGex super-lattice structure and preparation thereof. The high quality strain Ge/Si1-xGex super-lattice structure comprises a Si substrate, and a Si0.2Ge0.8 virtual substrate layer, a B-doped Si0.2Ge0.8 epitaxial layer, a Si0.2Ge0.8 blocking layer, a Ge/Si1-xGex super-lattice layer, a P-doped Si0.2Ge0.8 epitaxial layer, a Si0.2Ge0.8 blocking layer and a Si protective layer sequentially and epitaxially grown on the Si substrate, wherein x is more than or equal to 0.6 and less than or equal to 0.7. The epitaxial layers are sequentially grown on the Si substrate by adopting a reduced pressure chemical vapor deposition method; the obtained super-lattice structure has the properties of low dislocation defect density, low thickness and flat interface/surface, and the Ge/Si1-xGex super-lattice is in a strain state; and the super-lattice structure has high quality and is particularly suitable for manufacturing silicon-based laser devices and waveguide modulators.

There is provided a method for manufacturing a plugged honeycomb structure, where slurry 6 functioning as a raw material for the plugged portions is stored in a storage container 7 so that the slurry 6 may have a flat interface, and the plugged portions are formed by pressing an end face of the honeycomb structure 3 having a mask 8 for forming plugged portions disposed so as to cover open end portions of the cells other than the cells 9 to be plugged of the honeycomb structure 3 against the slurry 6 stored in the storage container 7 to introduce the slurry 6 into the inside of the cells 9 to be plugged.

A high impact resistant pick in a holder having a super hard material bonded to a cemented metal carbide substrate at a non-planar interface. The cemented metal carbide substrate is bonded to a front end of a cemented metal carbide bolster. A bore is formed in a base end of the carbide bolster generally opposed to the front end. A steel shank being fitted into the bore of the bolster at a bolster end of the shank, and a portion of the shank is disposed within a bore of the holder at a holder end of the shank.

A tool has a sintered body of diamond or diamond-like particles in a metal matrix bonded to a cemented metal carbide substrate at a non-planar interface. A working surface has at least one region fir enough away from the non-planar interface that during high pressure, high temperature processing a restricted amount of metal from the substrate reaches the region, the amount comprising 5 to 0. 1 percent of the region by volume, resulting in the region having a high density of superhard particles.

A high impact resistant tool having a sintered body of diamond or diamond-like particles in a metal matrix bonded to a cemented metal carbide substrate at a non planar interface, interface having at least two circumferentially adjacent faces, outwardly angled from a central axis of the substrate. The sintered body has a thickness of 0.100 to 0.500 inches proximate each face. The sintered body also has a flat working surface, wherein the tool has an angle of 30 to 60 degrees between the flat working surface and each face.