83results about How to "Reduced contact area" patented technology

A trench insulation gate bipolar transistor (IGBT) power device includes a plurality of trench gates surrounded by emitter regions of a first conductivity type near a top surface of a semiconductor substrate encompassed in base regions of a second conductivity type and a collector layer disposed at a bottom surface of the semiconductor substrate. The trench IGBT power device further includes an insulation layer covering over the top surface over the trench gate and the emitter regions having emitter-base contact trenches opened therethrough between the trench gates and extending to the base regions and an emitter-base contact dopant region disposed in the base region of the second conductivity type surrounding a lower region of the contact trenches. The emitter-base contact dopant region is disposed at a distance away from a channel near the trench gates for reducing an emitter-base resistance without increasing a gate-emitter threshold voltage.

An inner spacer is formed in a sidewall of a gate in contact with a first active region that is electrically connected to an upper capacitor, thereby reducing a gate induced drain leakage (GIDL). A structure of a recess gate transistor includes a gate insulation layer, a gate electrode, a first gate spacer, a second gate spacer and source/drain regions. The gate insulation layer is formed within a recess. The gate electrode is surrounded by the gate insulation layer and is extended from within the recess. The first gate spacer is spaced with a predetermined distance horizontally with a portion of the gate insulation layer, being formed in a sidewall of the gate electrode. The second gate spacer is formed in another part of the sidewall of the gate electrode. The source/drain regions are formed mutually oppositely on first and second active regions with the gate electrode therebetween.

A shank milling cutter includes a cutting portion which is intended to come into engagement with the workpiece, wherein the envelope surface of the cutting portion is substantially cylindrical. At least one major cutting edge is arranged at the peripheral surface of the cutting portion and at least one minor cutting edge (face cutting edge) is arranged at the end face of the cutting portion and with an end diameter D. The minor cutting edge, in projection onto a plane containing the milling cutter axis, has a convexly curved portion with a radius of curvature R>D/2 and a center of curvature M located such that a distance from the center of curvature M to the axis is in a range from zero to a value smaller than D/2.

A roller bearing retainer (13) includes a pair of annular ring parts (14) and a plurality of column parts (15) each including a column center part (16) provided in an axial center region so as to be positioned relatively on the radial inner side, a pair of column end parts (17) provided in axial end regions so as to be positioned relatively on the radial outer side, and a pair of column sloped parts (18) positioned between the column center part (16) and the pair of column end parts (17), and connecting the pair of ring parts to each other. A thickness of each part of the column center part, the pair of column end parts, and the pair of column sloped parts is smaller than a thickness of a boundary part between the adjacent parts.

The invention discloses an auxiliary device for blue anodic corrosion of a low-pressure turbine disc. The auxiliary device comprises a fixture, the tail end of the fixture serves as a clamping end for fixedly clamping the turbine disc, the clamping end comprises a first clamping arm and a second clamping arm, the first clamping arm and the second clamping arm are provided with a first positioning bolt and a second positioning bolt which are used for transversely fixing the turbine disc respectively, and the tail end of the first clamping arm and the tail end of the second clamping arm are provided with a first fixing base and a second fixing base which are used for longitudinally fixing the turbine disc respectively; the auxiliary device further comprises bubble discharging pipes for discharging bubbles in a groove formed in the lower surface of the turbine disc, and the bubble suction ends of the bubble discharging pipes stretch into the bottom of the groove formed in the lower surface of the turbine disc. According to the auxiliary device, the turbine disc is effectively fixed through the positioning bolts arranged on the fixture and the fixing bases arranged at the bottom ends of the positioning bolts, and therefore the condition that when the low-pressure turbine disc is subjected to blue anodic corrosion, unexpected accidents occur due to the fact that the turbine disc swings back and forth due to stirring is avoided.

An antenna for enhancing characteristic of a beam with reducing PIMD is disclosed. The antenna includes a reflection plate, at least one first choke member disposed on one side of the reflection plate, an insulated member disposed between the reflection plate and the first choke member, thereby separating the first choke member from the reflection plate, wherein the insulated member is an insulator, and a connection member configured to connect electrically the first choke member to the reflection plate through the insulated member, wherein the connection member is a conductor.

An electronic device with grounding structure consists of a conductive load-carry board with a conductive fixing column and a circuit board with a through hole. It is featured as arranging a grounding layer at periphery of said through hole, checking said fixing column into said through hole for fixing said circuit board and connecting said fixing column with said grounding layer.

Embodiments relate to a lens assembly, a lens driving apparatus, and a camera module comprising same. A lens assembly according to an embodiment may comprise: a first pin; a first housing which moves along the first pin; a first lens group arranged in the first housing; and a first wheel which is arranged in the first housing and moves along the first pin. The first wheel may include a first rotation shaft coupled to the first housing, and a first rotation part which rotates about the first rotation shaft. The first rotation part may include a groove corresponding to the first pin, wherein the maximum depth of the groove may be less than one-half the maximum thickness of the first pin in a direction perpendicular to the first rotation shaft.

The invention discloses a wave piercing type buoy structure and a buoy system. The wave piercing type buoy structure comprises an upper end cover plate, middle pontoons, a lower end cover plate, a tail cylinder and a balance weight, wherein the multiple middle pontoons are arranged between the upper end cover plate and the lower end cover plate, gaps are formed between adjacent middle pontoons, and the tail cylinder and the balance weight are arranged at the bottom of the lower end cover plate sequentially; multiple lifting lugs are arranged at the top of the upper end cover plate and the bottom of the lower end cover plate respectively. The wave piercing type buoy structure and the buoy system can allow wind, waves and flow to pass through, the action areas of the wind, the waves and the flow contacted with a buoy are effectively reduced, the acting force of the wind, the waves and the flow to the buoy is reduced, the stability of the buoy is effectively improved, and the working reliability of the buoy is improved by means of the multiple middle pontoons.

The invention discloses a hydraulic driving underwater drilling machine drill bit structure. The hydraulic driving underwater drilling machine drill bit structure comprises a core barrel, a straight joint, a clamp spring and a drill bit which are coaxially arranged. The drill bit is of an integrated structure which is formed by a drill bit steel body and a diamond carcass through hot pressing, the clamp spring is of an inverted circular cone elastic tubular structure which is consistent with the conicity of the inverted circular cone face, an axial opening is formed in the side wall and installed in the drill bit steel body, and an inward annular boss is arranged at the front end of the straight joint. According to the hydraulic driving underwater drilling machine drill bit structure, the structural design of the drill bit and the clamp spring is ingenious, using of the tools of the clamp spring, a clamp spring seat, a short circuit, a reamer and the like in a traditional core-taking process is simplified, in the drilling process, abrasion of the clamp spring and the clamp spring seat can be effectively slowed down, the service life is prolonged, the surface of the rock core is prevented from being damaged, in the core-taking process, the clamp spring seat extrudes the whole clamp spring inwards simultaneously, so that the clamp spring tightly clamps the rock core, the clamp sprig is effectively prevented from moving upwards along with the clamp spring seat, and therefore rock core drilling and taking can be completed with once operation.

A press-fit terminal held in a through hole provided in a board by being inserted into the through hole along an inserting direction includes a first contacting portion and a second contacting portion configured to resiliently contact an inner peripheral surface of the through hole. A value obtained by dividing a radius of curvature of the second contacting portion by a radius of curvature of the first contacting portion is 0.75 or smaller in a cross-sectional view perpendicular to the inserting direction. By providing the first and second contacting portions adjacent between adjacent press-fit terminals, a contact part where a contact pressure applied to the inner peripheral surface is small and a contact part where a contact pressure applied to the inner peripheral surface is large are adjacent between adjacent through holes. Thus, it can be suppressed that damaged parts of the board approach between the adjacent through holes.

A silver nanowire ink intermediate product having dispersed therein silver nanowires has an organic protective agent attached to a surface thereof, the protective agent being 1.5 to 8.0% by mass based on the total amount of the organic protective agent and silver. The intermediate product is subjected to a dispersion treatment by a thin film revolution method to control the silver nanowires in the ink to have a number of folds per unit length of the wires of 20.0 per mm or less, obtained by measuring over a total wire length of 1.0 mm or more. The ink has an existing amount of particles having a particle diameter exceeding 7 μm of 50 per mL or less per unit volume of the ink, measured with a liquid borne light extinction particle counter. The ink has a suppressed amount of coarse foreign particles to enhance conductivity of a transparent conductive film.