1082 results about "High volume manufacturing" patented technology

Silicon photonics technologies adds integrated optics functionality to CMOS integrated circuits thereby leveraging high volume manufacturing. Independent of geometry or technology these silicon photonic devices require packaging with single mode optical fibers to interface to the optical network and / or co-packaging with active semiconductor devices, discrete microoptoelectromechanical systems (MOEMS) s or monolithically integrated MOEMS. Stringent performance constraints and minimizing manufacturing costs / times are consistent demands on such photonic circuits. Accordingly, there is a demand for low-cost and low-loss optical coupling technologies for packaging that can easily be scaled for mass production that overcome limitations in the prior art. The inventors have established design methodologies, packaging schemes and component designs that leverage automated passive assembly techniques for speed / cost in combination with directly written optical interconnects that allow for offsetting the losses that would arise from the manufacturing tolerances of these passive assembly techniques.

The invention provides a multilayer circuit board and a processing method thereof, a chip system and electronic equipment, and the processing method comprises the steps: processing a second hole channel, a first conductive pattern and a second conductive pattern on a first substrate, and processing a third hole channel on a second substrate; the first substrate, the second substrate and the first insulating layer are stacked, pressed and fixed; the processing method further comprises the following steps: carrying out electroplating hole filling on the first substrate to form a second conductive channel; the processing method further comprises the steps that the second substrate is electroplated so that a sixth conductive pattern and a third conductive channel can be formed, the first insulating layer comprises a first conductive part, and the first conductive pattern, the second conductive pattern and the sixth conductive pattern are electrically connected with the second conductive channel through the third conductive channel and the first conductive part. The second hole channel and the third hole channel are filled in an electroplating hole filling mode, so that the wiring density and the chip signal transmission capability of the multilayer circuit board are improved, and the electrical performance and the thermal performance of the multilayer circuit board are improved; electroplating hole filling is suitable for mass production, and the process yield is stable.

The invention belongs to the technical field of metal material forming, and relates to a high-strength plastic titanium-based composite material annular part and a preparation method and application thereof. The preparation method comprises the following steps: firstly, uniformly mixing titanium alloy powder and reinforced phase powder, then preparing an annular blank according to the technological process of smelting, plasma rotating electrode atomization, degassing seal welding, hot isostatic pressing and ring rolling, and finally, annealing the annular blank to prepare the target annular part. According to the method, the titanium-based composite material powder is prepared by replacing a traditional laboratory small-batch ball milling method with a large-batch mixing method, a vacuum induction melting rod manufacturing method and a plasma rotating electrode atomization method, a reinforced phase can be introduced into a titanium matrix crystal and uniformly distributed, and the method is suitable for industrial large-batch production requirements; the titanium-based composite material annular part is prepared through the technology of powder metallurgy blank making and thermal deformation, and the effects of shortening the machining period and improving the material utilization rate and the forming rate are achieved through the precise size of powder metallurgy forming and the high efficiency of special-shaped ring rolling.

The invention relates to a vertical chemical vapor deposition furnace which comprises a vertical furnace tube, a liftable furnace door arranged below the furnace tube, a wafer boat assembly, an overturning table assembly, a lifting table assembly, a storage area, a temporary storage area, a wafer conveying box manipulator assembly and a wafer fork hand assembly, the overturning table assembly comprises an overturning table and an overturning driving mechanism for driving the overturning table to overturn; the overturning table is provided with at least one storage position for fixing a wafer conveying box; the lifting table assembly comprises a lifting table arranged below the overturning table, a carrier roller horizontally arranged on the lifting table, a rotation driving mechanism for driving the carrier roller to rotate and a lifting driving mechanism. The automatic edge flattening and arraying device has the advantages that automatic edge flattening and arraying can be achieved, automatic assembly line work of arraying feeding is achieved, and production efficiency is improved. By designing the independent fork hand and the fork hand set which are driven respectively, the function that the independent fork hand stretches out independently during small-batch trial-manufacturing is achieved, the independent fork hand and the fork hand set conduct overall synchronous telescopic operation during large-batch production, and the production efficiency cannot be reduced.

The invention discloses a weak-rigidity free-form surface monocrystalline silicon reflecting lens and a processing method thereof. The method comprises the following steps: obtaining a monocrystalline silicon block; cutting into blocks; diamond wire cutting; precisely grinding the back surface; performing slicing; the free-form surface sucker adsorbs the lens; precisely grinding the front surface into a cylindrical surface; polishing the magnetorheological elastomer; releasing the lens; the cylindrical sucker adsorbs the lens; precisely grinding and thinning the back surface; releasing the lens; cutting edges and carrying out wet etching on the back surface; and carrying out ion beam modification processing to achieve the final surface shape precision of the free-form surface. According to the X-ray reflecting lens machining method, the free-form surface weak-rigidity reflecting mirror is clamped and deformed into the cylindrical surface for machining, the whole process is ultra-precision grinding and polishing of the cylindrical surface, the machining method is simple and mature, the manufacturing cost is extremely low, dependence on an ultra-high-precision multi-axis linkage machine tool is completely eliminated, and the machining precision is greatly improved. And the machining efficiency is greatly improved, and the method is suitable for mass production of reflectors.

The invention discloses a preparation method for ensuring thickness uniformity and form and location tolerance of a coating of a slender shaft, the slender shaft is a slender stepped shaft-shaped part, the preparation method comprises base body processing before plating, hard chromium plating and machining after plating, in the base body processing process stage before plating, a center hole is adopted as a processing reference, finish machining is carried out according to the shape of the part, and the thickness uniformity and the form and location tolerance of the part are guaranteed. It is ensured that the form and position error and dimensional tolerance of the machined part meet the requirements; in the hard chromium plating stage, the non-chromium-plated part is protected, and the chromium-plated part is subjected to hard chromium plating; and in the post-plating machining stage, the center hole is adopted as a machining standard, post-plating rough machining is conducted firstly, then post-plating finish machining is conducted, grinding is conducted to meet the design requirement, and a plated workpiece is obtained. By the adoption of the preparation method, the problem of machining deformation of the slender shaft type structural part is thoroughly solved, the machining performance is stable, the production efficiency is high, special equipment and tools do not need to be configured, and the method is suitable for large-scale production and machining.

The present invention is directed toward an addressable ignition stage which produces an output sufficient to detonate a secondary explosive, generally. The present invention comprises addressability and ignition functions that may be used together or separately to incorporate a high-power resistor with a thermally conductive substrate allowing for operation at high temperatures for ignition. The ignition stage is amendable to high volume production, exhibits a high degree of reliability, robustness and operational dependability for use alone or configurable into existing technology.

The invention discloses flexible battery piece slitter edge removing equipment, a flexible battery piece slitter edge removing method and a battery production line, and relates to the technical field of flexible batteries. The flexible battery piece slitter edge removing equipment comprises a rack, a conveying device and a slitter edge removing device, wherein the conveying device and the slitter edge removing device are installed on the rack. The flexible battery piece is clamped through the jacking mechanism and the pressing and holding mechanism, then the waste edge of the flexible battery piece is subjected to bidirectional pushing and breaking through the first pushing and breaking mechanism and the second pushing and breaking mechanism in sequence, so that the waste edge is broken along a waste edge crack on the flexible battery piece, the waste edge removing efficiency is effectively improved, the labor cost and the time cost are reduced, the automation degree is high, and the production efficiency is improved. And moreover, the pushing and breaking force is uniform, and the quality of the flexible battery piece is ensured.

The invention discloses a NaFePO4 modified sodium ferric phosphate pyrophosphate composite positive electrode material, a preparation method thereof, a positive plate and a battery, the chemical formula of the composite positive electrode material is Na < 4 + x > Fe < 3 + x-y > (PO4) < 2 + x > (P2O7), 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 Xlt; 0 < = y < = 0.1. Wherein x represents the content of NaFePO4, and when 0 lt, x represents the content of NaFePO4; x is more than 0.3 and less than or equal to 0.3, the material exists in the form of a solid solution, no NaFePO4 phase appears, when x is more than 0.3 and less than 1, NaFePO4 appears in the form of a second phase, and the material is a composite phase of NaFePO4 and Na4Fe3 (PO4) 2 (P2O7). The positive electrode material provided by the invention has the characteristics of high theoretical specific capacity, long cycle life and high average working voltage in the aspect of electrochemical performance, is low in cost, environment-friendly, smooth in synthesis path and easy for mass production, and is an ideal sodium ion battery positive electrode material.

The utility model discloses a drawer-type core-pulling structure wheel speed sensor injection mold which comprises an upper mold base, a lower mold base, a lower mold base and a plurality of positioning guide columns, wherein the upper mold base is provided with a profiling mold cavity and a plurality of positioning guide columns; a fixed seat, a core-pulling seat and a plurality of positioning guide holes are arranged on the lower die seat, the plurality of positioning guide holes are matched with the plurality of positioning guide columns for positioning, a chip die cavity and a wire positioning groove are formed in the top of the fixed seat, a bushing die cavity is formed in the fixed seat, and an opening communicated with the bushing die cavity is formed in the side surface, facing the core-pulling seat, of the fixed seat. The core pulling seat is horizontally connected with the lower die seat in a sliding mode and can move towards the fixing seat, a lining positioning die core is arranged on the side face, facing the fixing seat, of the core pulling seat, and the lining positioning die core can penetrate through the opening and stretch into the lining die cavity; the injection mold is exquisite and flexible in structure and refined, meets the requirement for large-scale production of small-tonnage machines and has the advantage of reducing energy conservation and energy consumption of the machines, and the development cost can be reduced by about 30%.

The invention relates to the technical field of ship engine manufacturing and machining, in particular to a machining method of a special-shaped locking gasket with a hole and a stamping die tool of the special-shaped locking gasket with the hole. Comprising a base, a blanking and punching die, discharging rubber, a discharging plate, an upper support, a die handle, a pushing rod, a base plate, a male die base, a blanking female die, a discharging device, a pushing block and a punching male die, a machine tool is started, an upper die of the punching die tool is lifted and separated from a lower die, then a long-strip-shaped plate blank is placed on the discharging plate, the upper die of the punching die tool is pressed downwards to a fixed distance, and the punching male die is pressed downwards. The special-shaped stop gasket with the hole is punched by pushing the push rod to eject the punched and formed special-shaped stop gasket with the hole down, one-time punching machining of the special-shaped stop gasket with the hole is completed, and continuous punching machining can be carried out by repeating the operation, so that the machining efficiency of the special-shaped stop gasket with the hole is improved. By the adoption of the structure, one-time stamping forming of the special-shaped locking gasket with the hole is achieved, the process route is simple, operation is easy and convenient, and the requirement for mass production can be met.

The invention discloses a low-splash laser welding method suitable for X-Pin motor stator pins, and relates to the field of laser processing application, the method comprises the following steps: configuring a pin clamping tool, and clamping and lapping the pins of a permanent magnet motor stator by using the pin clamping tool; performing laser welding on the pins of the permanent magnet motor stator by using a pre-configured composite laser welding lens based on the laser welding position, the laser welding path and an anti-reflection mechanism; and a laser beam spot control mechanism is utilized to expand the range of a molten pool for laser welding and reduce the welding energy density of laser. According to the X-Pin motor copper welding device, the characteristics that light spots of a semiconductor blue light laser are uniform, the blue light absorptivity of copper is high, and the absorptivity changes slightly along with the temperature are utilized, the mode that the blue light spots replace infrared annular light spots is adopted, extremely-low splashing of X-Pin motor copper welding is achieved, the use cost is lower, and large-batch production is better facilitated.

According to the cold extrusion forming process and die for the thin-wall pure aluminum camera shell, a 1060 pure aluminum plate serves as a blank, surface pretreatment, first extrusion, annealing, surface retreatment and second extrusion are conducted in sequence, and finally a small amount of machining is conducted to obtain a finished product. According to different extrusion procedures, dies matched with the method are divided into a floating radial extrusion die and a floating combined extrusion die, and each of the floating radial extrusion die and the floating combined extrusion die comprises an upper die assembly, a middle floating die assembly and a lower die assembly; the floating radial extrusion die forms a radial extrusion cavity in the die assembly process, first-order extrusion is completed, and a radial extrusion forging stock is obtained; and the floating combined extrusion die forms a combined extrusion cavity in the die assembly process, two-order extrusion is completed, and a combined extrusion forging stock is obtained. Radial extrusion and combined extrusion share the same press frame, the die cost is remarkably reduced, and the die is suitable for large-scale production of thin-wall pure aluminum camera shells in multiple scenes such as vehicle-mounted scenes and security and protection scenes.

The invention discloses a detection assembly system and a detection assembly method for a frame bushing, the detection assembly system comprises a press fitting part, a positioning part, a first detection part, a second detection part, a third detection part and a control part, the problem of separation of detection and assembly is solved, the axial rigidity detection of the bushing can be completed in the initial stage of press fitting, and the detection efficiency is improved. Extra detection procedures are not needed, the overall production cycle is greatly shortened, and the method is suitable for the large-batch production rhythm; potential quality hazards caused by sampling detection are eliminated, and abnormal linings are prevented from flowing into subsequent links; the positioning ends of the positioning pieces can be close to or far away from each other, and by combining the supporting design of the guide inclined surfaces, the tool can be adaptive to bushing outer sleeves of different sizes, frequent tool replacement is not needed, and the equipment debugging cost is reduced; while the assembly precision of the bushing is ensured, high efficiency, no damage and full coverage of rigidity detection are realized, the production quality and efficiency of the auxiliary frame are obviously improved, the later rework cost is reduced, and the control performance of the whole vehicle and the stability of NVH (Noise Vibration and Harshness) performance are ensured.

The invention discloses a rapid punch forming process and die based on multiple stations. The die comprises a workbench, an upper die, a lower die, a driving assembly and a combined driving mechanism. The air cylinder drives the lower die to ascend and descend and suck blanks in a vacuum mode, the motor drives the upper die to conduct stamping, the dies are locked during stamping and accurately rotate by 90 degrees to switch stations during resetting by means of differential meshing of a groove and a plane of a tooth part, and finished products fall into a collecting box after being demolded through gravity. The problems of insufficient station switching precision, action interference and low automation degree of a traditional multi-station mold are solved, full-process automatic linkage of adsorption, punching, rotation and demolding is achieved through cooperation of pneumatic and magnetic attraction assemblies, and manual intervention is avoided. The four-station continuous punching machine has the characteristics of four-station continuous machining, motion interlocking interference prevention, accurate positioning, high efficiency and stability, the mass production efficiency and the finished product percent of pass are remarkably improved, and the four-station continuous punching machine is suitable for high-speed punching forming in the fields of automobile parts, electronic elements and the like.

The invention relates to the technical field of die monitoring, and discloses a new energy heavy truck stamping die wear monitoring system and method.The new energy heavy truck stamping die wear monitoring system comprises a monitoring unit and a control unit, and the monitoring unit comprises a multi-channel acoustic emission monitoring module, an ultrasonic monitoring module, a spectrum confocal monitoring module, a temperature monitoring module, a pressure monitoring module and a data acquisition module; the data acquisition module is used for acquiring monitored data signals, and the control unit is used for controlling the monitoring unit and displaying a monitoring result. The effect of monitoring the abrasion condition of the stamping die in real time can be achieved, the situation that mass produced parts do not reach the standard is avoided, the acoustic emission sensor is installed on the stamping die to monitor acoustic signals of the stamping die in the using process in real time, and therefore the abrasion condition of the stamping die is judged; the wear condition is monitored by measuring sound wave reflection inside or on the surface of the stamping die through the arranged ultrasonic sensor, and tiny changes on the surface of the stamping die can be detected.

The invention relates to a method for manufacturing a high-performance blackbody radiation layer, which comprises the following steps of: firstly, providing a growth substrate for growing the blackbody radiation layer; then, photoetching patterning is carried out on the substrate; then, plasma etching is carried out on the substrate containing the photoetching pattern; and finally, carrying out high-temperature annealing treatment on the substrate. The MEMS infrared light source is simple in process flow, compatible in preparation process and semiconductor process, suitable for process integration and mass production, and beneficial for reducing the cost of the MEMS infrared light source, the black body radiation layer is obtained by carrying out plasma etching on the photoresist and then carrying out high-temperature annealing, the patterning of the black body radiation layer is equal to the patterning of the photoresist, and the manufacturing cost of the black body radiation layer is reduced. Compared with other types of black body radiation layers, the black body radiation layer has the advantage of being easy to manufacture tiny patterns.

The invention discloses a standard formwork full-automatic production system, and relates to the technical field of standard formwork automatic production, and the standard formwork full-automatic production system comprises a production management module which is used for storing production process parameters of various models of formworks and configuration information of formwork assemblies, and carrying out the calling according to the demands of production orders; the reloading module is provided with a standardized formwork interface and a positioning mechanism and is used for mounting and dismounting the formwork, and the monitoring module comprises sensors mounted at the mounting position of the formwork and key parts of production equipment. According to the full-automatic production system for the standard formwork, through the mode that software and hardware of the production management module and the reloading module are combined, the problem of formwork model switching in multi-model and large-batch production is effectively solved, and the flexibility and production efficiency of the full-automatic production system for the standard formwork are improved; manpower is effectively reduced, the efficiency is improved, the labor intensity is reduced, the safety coefficient is improved, and diversified requirements in a real production scene are met.

The present invention relates to the technical field of lithium-ion batteries, and in particular to a mixed slurry for preparing a positive electrode material and a preparation method for the mixed slurry. The preparation method comprises the following steps: dispersing, for N times, a first slurry comprising a manganese iron phosphate precursor and a lithium source in an organic solvent to obtain a second slurry, and performing heat treatment until the pH value of the second slurry tends to be stable, so as to remove gas in the first slurry to obtain a mixed slurry for preparing a positive electrode material, wherein N is a positive integer greater than or equal to 2, the boiling point of the organic solvent is greater than or equal to 160°C, and the temperature of the heat treatment is 100-200°C. The preparation method can greatly reduce the specific surface area of a positive electrode material without affecting the electrochemical performance thereof, is simple to operate, and is suitable for mass production.

The present invention is directed toward an addressable ignition stage which produces an output sufficient to detonate a secondary explosive, generally. The present invention comprises addressability and ignition functions that may be used together or separately to incorporate a high-power resistor with a thermally conductive substrate allowing for operation at high temperatures for ignition. The ignition stage is amendable to high volume production, exhibits a high degree of reliability, robustness and operational dependability for use alone or configurable into existing technology.

The invention relates to a photoelectric integrated double-frequency laser for coherent wind measurement, which comprises a first light source module, a second light source module, a first coupler module, a second coupler module, a third coupler module, a first beam splitter module, a second beam splitter module, a third beam splitter module and a first balanced photoelectric detector module, a second balance photoelectric detector module, a modulator module, an optical phase-locked loop module and a transceiver. Based on the silicon-based optoelectronic chip technology and the photoelectric hybrid packaging technology on the structural level, the coupler, the beam splitter and the photoelectric detector are integrated on the silicon optical chip, and the silicon optical chip, the DFB chip, the coupling optical path, the electrical module and the like are packaged together by utilizing the photoelectric hybrid packaging technology, so that high-density integration is realized; a heterodyne digital optical phase-locked loop technology is applied to a system level, so that a specific frequency difference exists between output signal light and reference light, and pulse light with a high extinction ratio is generated in a modulator cascading mode. Compared with a conventional single-light-source system scheme, the heterodyne Doppler wind measurement laser radar system can greatly improve the integration level, reduce the power consumption and the cost, and is beneficial to mass production, and compared with a homodyne detection mode, heterodyne detection is higher in measurement speed, simpler in scheme and better in stability. The system has extremely high expansibility, and can be applied to systems of optical fiber sensing, laser remote sensing and cold atomic clocks through operations of replacing a transmitting-receiving device, modifying a control program and the like.

The invention discloses a double-metal gradient diffusion layer modified high-nickel ternary positive electrode material and a preparation method thereof. The preparation method comprises the following steps: filtering and uniformly dispersing high-nickel ternary positive electrode material powder; introducing inert gas into the atomic layer deposition system, and raising the temperature to a target temperature; respectively preheating the metal precursors A and B to proper temperatures; the preparation method comprises the following steps: sequentially introducing a metal precursor A, precursor water, a metal precursor B and precursor water into a reaction chamber, alternately depositing according to a pulse-reaction-purging sequence, and repeatedly circulating the process to obtain the bimetallic oxide coated high-nickel ternary positive electrode material, and post-annealing treatment. According to the bimetal gradient diffusion layer modified high-nickel ternary positive electrode material prepared by the preparation method disclosed by the invention, the lithium storage performance of the high-nickel ternary material is greatly improved, excellent cycling stability and rate capability are obtained, the coating layer is accurate and controllable, the preparation process is simple, meanwhile, large-batch production can be realized, and relatively high application value is achieved.

The invention relates to an integrated quantum bit output link. The integrated quantum bit output link comprises three sections of circulators; the load is arranged on the three-section circulator, and the load is used for absorbing reversely transmitted signals; a connector is arranged in the Josephson parameter amplifier, and the Josephson parameter amplifier is connected with the three-section circulator through the connector. According to the integrated quantum bit output link provided by the embodiment of the invention, the Josephson parametric amplifier and the three-section circulator are directly transited through the coaxial connector, so that the quantum bit can still keep good performance in a super low-temperature environment, and the effects of high integration, high heat conduction and magnetic shielding are achieved. The overall structure of the device is firm and reliable, parts forming the device are simple, assembly and mass production are easy, and the size of an integrated quantum bit output link is effectively reduced.

The invention relates to the technical field of casting, and discloses a special-shaped chilling block structure for strong chilling and a rapid preparation method.The special-shaped chilling block structure for strong chilling comprises a chilling block body, imbedding connecting pieces are arranged on the two sides of the bottom of the chilling block body, and the imbedding connecting pieces are of hollow structures; an inverted-U-shaped cooling through hole is formed in the portion, between the two imbedding connecting pieces, of the chilling block body. The chilling block body is of a fan-shaped structure, the multiple chilling block bodies form a ring, the interior of the ring is assembled on a sand core, and the surface of the ring is used for chilling of a casting special-shaped structure. The method has the advantages that a thin sand shell only needs to be replicated and printed, low-cost resin sand is used for filling and molding after rapid assembly, and production can be achieved through pouring, due to the fact that most of expensive printing sand materials are replaced with the low-cost resin sand, the manufacturing cost is low, the method has the advantages of 3D printing manufacturing accuracy and short period, and the method is suitable for large-scale popularization and application. The method is suitable for mass production.

The utility model relates to the technical field of vertical band sawing machines, and discloses a steel tube bundle end face vertical band sawing machine which comprises a main body mechanism, a fixing mechanism and a driving mechanism, the driving mechanism comprises a motor and a transmission part and is responsible for driving a saw blade to conduct cutting operation, and the vertical band sawing machine is a main cutting tool. The notch provides a movement path for the saw blade on the operation table, the sliding rail is used for guiding and stabilizing movement of a workpiece, and the control panel provides an operation interface for an operator and is used for controlling operation parameters and states of equipment. The high efficiency of the working process is optimized, due to the fact that the automatic fixing and driving mechanism is adopted, the cutting process is faster and more coherent, the requirement for manual operation is reduced, the production efficiency is greatly improved, the automation degree of the equipment not only accelerates the operation speed, but also reduces material waste through accurate control, and the production cost is reduced. Efficient utilization of resources is ensured, and the method is particularly important for mass production.

The invention belongs to the technical field of luminescent materials, and discloses an up-conversion nano material as well as a preparation method and application thereof. The up-conversion nano material comprises a core, the element composition of the core is NaErF4: Nd, Yb and Ce, and the molar weight of Nd accounts for 2%-15% of the total molar weight of rare earth elements of the core; the core is coated with a middle shell, the element composition of the middle shell is NaYF4: Yb, and the molar weight of Yb accounts for 20%-100% of the total molar weight of rare earth elements of the middle shell; the outer part of the middle shell is coated with a passivation shell, and the element composition of the passivation shell is NaYF4. According to the up-conversion nano material, through fine ion doping and a unique energy transfer mechanism, efficient up-conversion blue and ultraviolet light emission of Er < 3 + > can be achieved; the preparation method of the up-conversion nano material is simple in process, easy to operate, low in cost, short in period and suitable for mass production.

The utility model discloses a novel automatic tapping machine which comprises a machine frame, a tapping device and a vibration disc. The tapping device is arranged above the rack; the vibration disc is arranged above the placing table assembly and located beside the tapping device. According to the novel automatic tapping machine, equipment can automatically complete the processes of tapping, discharging and the like, manual intervention is reduced, the labor intensity is lowered, and the production safety is improved; the equipment is reasonable in structural design, convenient and fast to maintain and capable of meeting the requirement for long-time efficient mass production; the device is suitable for workpieces of various materials and sizes and can meet different thread machining requirements.

The invention provides an improved trench super-junction MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) which comprises an epitaxial N-type substrate layer, P columns, N columns, an interlayer insulating layer, a body region, a source region, a metal layer, grid polycrystalline silicon, a grid oxide dielectric layer and a dielectric isolation layer, wherein the P columns and the N columns are arranged on the epitaxial N-type substrate layer in a staggered manner; the grid polycrystalline silicon, the grid oxide dielectric layer and the dielectric isolation layer are arranged on the source region; and the P column is a combined P column formed by a P-type layer formed by deep trench injection and P-type epitaxial filling. According to the improved groove super-junction MOSFET provided by the invention, the mixed P column is formed by the bottom formed by injection and the P layer formed on the side wall and the subsequently filled P epitaxial layer, and the P column and the original N-type epitaxial layer form the PN junction, so that the original PN junction is reserved, the advantage that the groove is easy to fill is combined, the product stability is greatly weakened by the factors of process fluctuation, and the product quality is improved. The method is suitable for large-scale production of a production line, and the product cost performance is high.

The invention relates to the technical field of sodium metal batteries, and discloses a composite negative electrode for a low-temperature sodium metal battery, which comprises sodium metal and NaF embedded on the surface or inside the sodium metal, the preparation method comprises the following steps: S1, preparing NaF powder by adopting a freeze-drying method; and S2, rolling the NaF powder prepared in the step S1 into a metal sodium foil by adopting a mechanical rolling mode to prepare the NaF-Na composite negative electrode material. According to the technical scheme, the problems that in the prior art, the preparation process is complex, danger is high, and mass production cannot be achieved can be solved, and meanwhile it is ensured that the composite negative electrode has high specific discharge capacity and excellent cycle performance in the low-temperature environment.

Methods and systems for detecting defects in images of a specimen are provided. One system includes a computer subsystem configured for training an ensemble of deep learning models by altering one or more parameters of the ensemble until a pseudo-loss function determined based on output of the ensemble is approximately equal to but not greater than 0.5. The computer subsystem is also configured for detecting defects in runtime specimen images by inputting the runtime specimen images into the trained ensemble and generating runtime labels for the runtime specimen images indicating if a defect has been detected in the runtime specimen images based on outputs of the deep learning models in the trained ensemble.