75results about How to "High thickness consistency" patented technology

The invention discloses a precise automatic press for electronic ceramics. The precise automatic press comprises a printed electronic-ceramics supporting table face (1), a printing silk screen component (2), a sizing agent scraper component (3) and a control mechanism (4), wherein the printed electronic-ceramics supporting table face (1) and the control mechanism (4) are arranged on a press frame (5), the printing silk screen component (2) is arranged above the printed electronic-ceramics supporting table face (1), the sizing agent scraper component (3) is arranged above the printing silk screen component (2), and the control mechanism (4) controls the printing silk screen component (2) and the sizing agent scraper component (3) to move up and down along a lifting mechanism, and controls the printing silk screen component (2) and the sizing agent scraper component (3) to move left and right along a rail mechanism. The positions and operation of the printed electronic-ceramics supporting table face, the printing silk screen component and the sizing agent scraper component are all controlled through the control mechanism, precision is greatly improved, and printing uniformity and thickness consistency are greatly improved.

The invention relates to a manufacturing technology of a field effect transistor, in particular to a method for thinning a substrate of a gallium nitride-based microwave field effect device. Aiming at the defects of a substrate thinning technology in the method for manufacturing the field effect transistor in the prior art, the invention discloses a method for manufacturing the field effect transistor, improves the substrate thinning technology of the field effect transistor so as to adapt to the thinning of a high-hardness substrate material, and improve the quality of a substrate process technology, the quality of the substrate and the overall performance of the device. By using the method for manufacturing the field effect transistor, in the manufacturing technology process of the field effect transistor, a carborundum substrate and other high-hardness substrates of the field effect transistor can be etched to be thinned by plasma. The invention can avoid the break of wafers and improve the quality of thinned substrates and is particularly suitable for a manufacturing technology of gallium nitride-based field effect transistor devices.

Disclosed are a fluorescent powder color wheel and a manufacturing method thereof. A plurality of substrates are assembled to form the fluorescent powder color wheel, and coated substrates and substrates with surfaces coated with fluorescent powder are assembled by the aid of a jig. By the aid of a novel fluorescent powder color wheel structure and the manufacturing method of the fluorescent powder color wheel, multiple functions of a single fluorescent powder color wheel are applied in a combined manner, and the novel fluorescent powder color wheel and a light source using the same are provided to realize flexible combined application of optical path design of a projection system and meet the requirements of an LED (light-emitting diode) light source and a laser light source for exciting light intensity and chromaticity.

The invention relates to an electrostatic spinning nozzle, in particular to a linear nozzle for electrostatic spinning. The linear nozzle is provided with a solution tank, a rotating shaft, a spiral metal ring, supporting bases and a driving device. The upper surface of the solution tank is open. The rotating shaft is arranged above the solution tank, is conductive and is externally connected with a high voltage electrostatic generation device. The two ends of the rotating shaft are connected with the driving device. The left and right sides of the rotating shaft are fixed to the supporting bases respectively. The rotating shaft is fixedly connected with the two ends of the spiral metal ring and located in the axis position of the spiral metal ring. The linear nozzle for electrostatic spinning solves the problems that the yield of an existing electrostatic spinning device is not high enough and the uniformity of thicknesses of spun fiber membranes is low, and can be used for manufacturing nano-fiber membranes on a large scale. The linear nozzle has the advantages of being simple in structure, low in cost, high in efficiency and the like. The spinning yield is greatly improved compared with a traditional needle tip electrostatic spinning nozzle, the problem that the nozzle is blocked does not exist, and the thickness consistency of the spun nano-fiber membranes is high.

The invention provides a growth method and device of a high-quality silicon carbide crystal. The method comprises the following steps: (1) an assembling stage; (2) heating stage; (3) nucleation stage: keeping the temperature of the center of the top end of the crucible at T1, controlling the thermal insulation cover to move downwards along the side wall of the thermal insulation cylinder, and controlling the temperature difference between the temperature of the center of the top end of the crucible and the temperature of the edge of the top end of the crucible to be gradually increased to deltaT2 so that the silicon carbide raw material gas phase is transmitted to the seed crystal for nucleation; and (4) growth stage: transmitting the silicon carbide raw material gas phase to the seed crystal for crystal growth. In the nucleation stage, an annular temperature field with the center of the seed crystal as the circle center is formed on the surface of the seed crystal, the heat preservation cover is controlled to move downwards, the annular temperature field is more uniform and stable, the radial temperature gradient is gradually and slowly increased, directional quantitative adjustment of the radial temperature gradient is achieved, the radial temperature gradient at the seed crystal is gradually increased, and multi-core competition and merging in the nucleation stage are promoted through the combined action; uniform and compact growth steps are formed, the generation probability of crystal defects is reduced, and the crystal growth quality is improved.

The invention discloses a control device for automatic and quantitative paste feeding to a lead storage battery coating plate. The control device comprises a photoelectric sensor, a switching power supply, a first intermediate relay, a time relay, a second intermediate relay and a paste feeding motor. The photoelectric sensor, the switching power supply, the first intermediate relay, the time relay, the second intermediate relay and the paste feeding motor are connected in sequence. A breaker is connected between the photoelectric sensor and the switching power supply. A switch is connected between the second intermediate relay and the paste feeding motor. The control device controls the paste feeding motor to add lead paste continuously, quantitatively and uniformly through the photoelectric sensor, the switching power supply, the intermediate relays and the time relay, arbitrariness and non-quantization of paste feeding are avoided, the influences imposed by inconsistent pressure of the lead paste in a paste hopper on paste feeding can be eliminated fundamentally, the weight and thickness uniformity of a polar plate is greatly improved, and the service life of a battery is prolonged.

The invention relates to the technical field of passivation protection of chips of semiconductor devices, in particular to a table chip double side electrophoresis glass passivation technology. The table chip double side electrophoresis glass passivation technology includes: using a modified electrophoresis frame, directly placing a silicon slice in an anodic metal half ring so as to use the silicon slice as an anodic plate, and placing negative plates on two sides of the anodic plate for electrophoresis. Accordingly, distances from table grooves in two sides of the silicon slice to the negative plates are equal, electric field distribution is even, and glass layers of the same thickness can be formed. Furthermore, an appropriate electrophoresis solution proportion and a glass sintering technology in a wet oxygen atmosphere are used, and therefore consistency of a double face glass passivation layer can be improved, glass is in complete and uniform in modeling, and simultaneously qualified rate and reliability of products can be improved, surge resisting ability of the semiconductor devices is enhanced, and production efficiency can be improved.

The invention belongs to the technical field of plastic processing and forming, and particularly relates to a PVC (Polyvinyl Chloride) sheet coated with an ASA (Acrylonitile Styrene Acrylate) film and a film coating method. The method comprises the following steps: acquiring the ASA film; fixing the ASA film on a film coating rack device, using the double-roller pressing and coating technique to thermally press and adhere the ASA film to the surface of the PVC sheet extruded from an extruding die head, and obtaining a prefabricated product of the PVC sheet coated with the ASA film, wherein the temperature of the PVC sheet is 100-250 DEG C; and dragging the prefabricated product of the PVC sheet coated with the ASA film to a forming machine, and conducting compression molding. The ASA film is firmly adhered to the PVC sheet through the temperature of the just extruded PVC sheet, the double-roller embossing and the subsequent compression molding pressure, so that the consistency and the evenness of the thickness of the ASA film are guaranteed effectively, the service life of the product is prolonged, and moreover, the time is saved, the production efficiency is improved, and the purposes of saving energies and reducing consumption are fulfilled.

The invention provides a technical scheme of a gas inlet structure and a gas inlet method of chemical vapor deposition equipment. A concentration detection unit is used for detecting the current concentration value of source gas on a gas inlet pipeline, and a control unit is utilized to control a flow regulating unit to regulate the flow value of the process gas according to the current concentration value and the target concentration value so that the mass of the process gas in the reaction chamber can be regulated, and the mass of the source gas in the process gas is equal to the target mass. Therefore, the quality of the source gas in the process gas in the reaction chamber can be consistent when the substrate is prepared at different moments, and the consistency of the growth rate of the silicon wafer in the reaction chamber is ensured, the thickness consistency of the silicon wafer is improved and the product yield is further improved. In addition, the invention also provides thechemical vapor deposition equipment.

The invention relates to spraying heads for electrostatic spinning, and provides a strip-shaped spraying head for electrostatic spinning, which can increase the yield of electrostatic spinning equipment and improve the thickness uniformity of spun fiber membranes and cannot be blocked. The strip-shaped spraying head comprises a solution feeding mechanism, a strip-shaped conductive sheet and a conductive sheet bracket, wherein the strip-shaped conductive sheet is fixedly connected with the conductive sheet bracket; the solution feeding mechanism is used for uniformly coating the surface of one side of the long edge of the strip-shaped conductive sheet with a spinning solution. During spinning, the strip-shaped conductive sheet is connected with the anode of a high-voltage direct-current power supply, a spinning collection plate is connected with the cathode of the high-voltage direct-current power supply, the solution is uniformly applied to the surface of one side of the long edge of the conductive sheet through the solution feeding mechanism, the solution on the strip-shaped conductive sheet forms electro-spinning under the action of an electrostatic force, and the solution feeding mechanism continuously coats the strip-shaped conductive sheet with the solution. The strip-shaped spraying head is simple in structure, the yield is greatly increased in comparison with that of a conventional spraying head for needle electro-spinning, no problem of spraying head blockage is caused, and the thickness uniformity of the spun nano fiber membranes is relatively high.

The invention relates to the technical field of mechanical equipment, in particular to surface rust-proof treatment equipment for a metal shell of wind power generation equipment. The surface rust-proof treatment equipment has the advantages that paint is continuously and automatically sprayed onto the metal shell, so that the physical strength during manual operation can be effectively saved, thepaint spraying speed can be increased, the working efficiency can be improved, meanwhile, the equipment automatically sprays the paint, the uniformity of the paint attached to the metal shell is improved, the paint thickness consistency is improved, the paint spraying quality is effectively improved, and the practicability and the reliability are improved. The surface rust-proof treatment equipment comprises a base, a workbench, a first flat plate and four groups of first fixing plates, the workbench is arranged at the top of the base, a power device is arranged at the top of the workbench, the first flat plate is located above the power device, the four groups of first fixing plates are evenly arranged on the outer side of the first flat plate, the bottoms of the four groups of first fixing plates are all fixed to the workbench, and multiple groups of conveying balls are evenly arranged on the first flat plate in a penetrating and inserted mode.

The invention discloses a paste mixing temperature and automatic acid-adding controlling device, which comprises a temperature control part and a pressurized acid spray control part, wherein the temperature control part comprises a temperature sensor, an A/D module, a controller and a D/A module; the temperature sensor, the A/D module, the controller and the D/A module are sequentially connected; the pressurized acid spray control part comprises a frequency converter, an acid adding pump and an acid mist spray head; the frequency converter, the acid adding pump and the acid mist spray head are sequentially connected; and the D/A module is connected with the frequency converter. By the control device, the lead paste temperature in the paste mixing process and the condition that an acid and a solution are mixed unevenly are effectively controlled through temperature control and pressurized acid spray control; the weight and thickness uniformity of the pole plates is greatly improved; and the service lifetime of a battery is prolonged.

The invention discloses a stamping die for an aluminum alloy shell of a notebook computer, which comprises a forming die, a die fixing plate, and a lower die base, and the die fixing plate is a frame-shaped plate, which is fixed on the lower die base plane, the forming die is embedded in the frame-shaped cavity of the die fixing plate, and in this technical solution, it also includes a supporting plate and a hydraulic device, and the supporting plate is arranged between the die fixing plate and the Between the stamping parts of the aluminum alloy shell, the output end of the hydraulic device is connected to the support plate to drive the support plate to move up and down. The stamping die sets a supporting plate between the aluminum alloy slab stamping part and the die fixing plate. After the stamping is completed, the punch rises, and the hydraulic device drives the supporting plate to lift the stamping part away from the plane of the groove fixing plate. Therefore, it is convenient to remove the stripping material, the device structure is simple, and the operation is convenient, which effectively saves the stripping time of the stamping parts and improves the stamping efficiency.

The invention provides a vacuum tube type microwave heating carbon furnace, relates to the technical field of high temperature vacuum coating equipment, and solves the technical problems that a heating temperature field inside the furnace is non-uniform and the resistance value of a resistor carbon film is not inconsistent. The vacuum tube type microwave heating carbon furnace comprises a furnacebody, a magnetron, a double-layer vacuum quartz tube with a jacket, and a microwave absorbing heating material, wherein the magnetron is arranged on a furnace body, and the magnetron can emit microwaves inside an inner cavity of the furnace body after being electrified; the vacuum quartz tube is arranged inside the furnace body in a rotating manner, and treated workpieces are placed inside the vacuum quartz tube for carbon coating film treatment; and the microwave absorbing heating material inside the jacket of the vacuum quartz tube can emit heat after absorbing microwaves, and the furnace body is further internally provided with a heat insulation layer made of a microwave-transmitting material. A novel material sintering method has the characteristics of high heating rate, high energy utilization rate, high heating efficiency, uniform material temperature field, good technological controllability, short technological period, good product uniformity and high rate of finished products.

The invention discloses a preparation method of a copper-clad plate, which comprises the following steps: (1) taking at least one prepreg, and stacking copper foils on the single side or double sides of the prepreg so as to obtain prepreg combinations; (2) taking at least one set of the prepreg combination, and placing the at least one set of the prepreg combination between upper and lower heating plates of a laminating machine to carry out laminated pressing; (3) in the stage of glue solution melting in the process of laminating, heating the periphery of the prepreg, so that a glue solution at the periphery of the prepreg achieves a high elastic state prior to a glue solution in the middle of the prepreg, wherein the relative curing degree of the glue solution in the high elastic state is over 60%; and (4) carrying out conventional laminating operation, so that the copper-clad plate can be obtained. According to the invention, a novel copper-clad plate preparation method is developed, so that the glue flowing problem in the process of laminating is prevented, and the problem that the thicknesses of four edges of the copper-clad plate are thin is effectively improved, thereby significantly improving the thickness uniformity and consistency of each part of the plate.

The invention provides a pixel electrode preparation method which can improve the flatness, and the pixel electrode is manufactured on a silicon substrate which is provided with a control circuit, as well as top metal and a protective oxide layer which are stacked on the control circuit. In the prior art, when the pixel electrode is manufactured, latticed oxide is prone to be facilitated to generate a convex, thus affecting the flatness of the pixel electrode, and further affecting the performance of liquid crystal on the silicon substrate. In the pixel electrode preparation method, firstly, a latticed oxide pattern used for dividing the top metal into a plurality of pixel electrodes is prepared by lithography and etching; then, an isolation oxide layer is deposited; after that, optical resist is coated on the isolation oxide layer and a pattern of pixel electrodes is prepared by lithography; then, the isolation oxide layer is etched according to the pattern of pixel electrodes and the optical resist is removed; after that, a flat oxide layer is deposited on the flat surface of the silicon substrate; finally, maskless etching is carried out to form the latticed oxide and the pixel electrodes. The invention has the advantage that the flatness of the pixel electrode can be greatly improved, and then the performance, especially the display contrast, of the liquid crystal on the silicon substrate is improved.