121results about How to "Offset stress" patented technology

The invention relates to a preparation method of a low-stress gallium nitride epitaxial layer. The preparation method includes: etching square or round patterns on the front or the back of a substrate; corroding the etched substrate layer with sulfuric acid or sulfuric acid/phosphoric acid mixed solution, cleaning with deionized water, and growing the gallium nitride epitaxial layer on the processed front of the substrate by an MOCVD (metal organic chemical vapor deposition) method; wherein etching depth of the patterns is 1-100 micrometers, and space between each two patterns is 1-10 micrometers. By the preparation method, low stress is borne by the gallium nitride epitaxial layer when the gallium nitride epitaxial layer grows on the processed substrate, production process is simplified, production stability is improved, piezoelectric polarization of active area of a light-emitting diode is avoided, and light-emitting efficiency of the light-emitting diode is improved. The light-emitting efficiency of the light-emitting diode made by the low-stress gallium nitride epitaxial layer is improved by 10%.

The invention provides a method for manufacturing a pre-deformation line diamond line saw through powder metallurgy, comprising the following steps: basic line manufacturing: selecting metal wires, stranding at least two metal wires into a line, and deforming the stranded line by a deformer to obtain a pre-deformation base line; powder preparation: weighing metal powder, a binder and diamond by mass percent, and adding the mixture into a blender mixer to evenly mixing; line blank manufacturing: putting the base line and powder into a mould, and taking the pre-deformation base line as a center to prepare a line blank by using a forming technology; and line saw manufacturing: putting the line blank to a sintering furnace for sintering, and cooling with the furnace to obtain the line saw. The manufacturing method provided by the invention has the advantages of simple process, low cost and high production efficiency. The produced line saw has excellent performance, high strength, good flexibility, high hold to diamonds, stable cutting performance, good chip discharging performance and long service life, and is not easy to crack.

The invention discloses a trench-type super-junction device layout structure. A plurality of grooves for forming a column in each grain, the adjacent parallel grooves as a groove array, the array direction of the grooves adjacent to each other perpendicular to the array. The present application also discloses a method of manufacturing a trench-type super junction devices, it has formed a super junction structure having two or more of an array of channels in each grain, each groove by adjacent and parallel array composed of grooves, the grooves adjacent to the array direction of the array perpendicular to each other; said method comprising the ion implantation process is formed to cover all the grooves of the array ion-implanted region, ion-implanted region is formed at least one groove parallel to the array and at least another array of channels perpendicular to; final on all array of channels are formed super junction devices. This application is arranged perpendicular to each other by adjacent grains or cell array of channels, and to counteract the stress of deep trenches etched, and overcome the dislocations and other defects.

The invention provides a home decoration toilet pipe-side floor drain treatment process. The treatment process comprises the steps of S1, digging out a groove in the concrete floor around the root of a pipeline, removing residue in the groove and cleaning the groove by use of water, S2, coating the groove with an interface waterproof agent once or twice under the condition of moist, S3, evenly mixing a multifunctional emulsion with quick-setting cement in the weight ratio of (0.3-0.5): 1 into a paste, applying the paste into the groove, and compacting and trowelling, S4, after the filler in the groove is solidified, coating the root and the four sides of the pipeline with a secondary pipe fixation waterproof glue. According to the home decoration toilet pipe-side floor drain treatment process, at least three waterproof layers, namely the interface waterproof agent layer, the mixed layer of the multifunctional emulsion and the quick-setting cement, and the waterproof layer of the pipe fixation waterproof glue are provided. Due to triple waterproofing operations, the waterproof effect is excellent and the service life is long.

By indirectly monitoring a warping amount of a substrate, it is possible to examine causes easily when substrate processing such as deposition is performed with nonuniform in-plane temperature of the substrate and a defect in a substrate characteristic, for example in uniformity of a film thickness, is caused. In a substrate processing apparatus for processing a substrate, a substrate holding body for holding the substrate on its surface and a resistance heater for heating the substrate through the substrate holding body are provided. Radiation thermometers for measuring temperature of the substrate holding body, which has a correlation with a warping amount of the substrate, from its rear surface side are provided to the resistance heater. The substrate holding body is provided to be rotatable with respect to the radiation thermometers so that temperature information of the substrate holding body in a circumferential direction can be obtained. A calculator as a monitor for monitoring the warping amount of the substrate having a correlation with the temperature of the substrate holding body, based on the measured values of the radiation thermometers, is provided. A command for correcting the warping amount is sent to a control means, based on the warping amount determined by the calculator, to control the resistance heater, as necessary.

The invention relates to a back coating material for tipping paper for cigarettes. The back coating material comprises, by weight, 1-10 parts of a resin, 10-50 parts of a softener and 5-25 parts of awater-retaining agent; and the resin is primary amine modified polyethyleneimine and/or acrylamide modified polycarbonate, and the softener is amino modified organosilicon. The invention also relatesto the tipping paper for cigarettes. The invention further relates to a preparation method of the tipping paper for cigarettes.

A fabrication method of a coreless packaging substrate is provided, including the steps of: forming an inner built-up circuit board on a carrier; removing the carrier; and symmetrically forming a first outer built-up structure and a second outer built-up structure on top and bottom surfaces of the inner built-up circuit board, respectively. The present invention effectively increases the product yield, saves the fabrication cost, and reduces wastes.

The invention discloses a refrigerator, which comprises a refrigerator body and a door body, wherein a refrigeration room is arranged in the refrigerator body, in addition, the refrigerator body comprises a refrigerator case, a refrigerator liner and a foaming layer, the foaming layer is positioned in a foaming space between the refrigerator case and the refrigerator liner, the refrigerator case is provided with a top cover plate, the top cover plate comprises a top cover frame and a high-density plate, the high-density plate is fixedly arranged on the lower surface of the top cover frame for shielding a center hole of the top cover frame, and the door body is arranged on the refrigerator body and is used for opening and closing the refrigeration room. The refrigerator according to the embodiment of the invention has the advantages that the manufacture is easy, the deformation cannot easily occur, the finished product rate is high, the cost is low, and the like.

A steel structure including pre-stressing brackets for improving load-carrying capacity and serviceability comprises: a steel girder; a plurality of connecting brackets connected to the bottom surface of the steel girder spaced and apart from one; and a cover plate connected to the bottom surfaces of the connecting brackets. Since the cover plate is installed regardless of the connecting portion of the steel girder, pre-stressing section can be consecutively formed therefore pre-stress effect is improved. Moreover, since the connecting brackets space the cover plate a constant distance from the steel girder, the moment of inertia is increased so the span of a bridge might be increased.

The invention discloses a dismantling robot for a residual refractory brick in a rotary kiln and a dismantling method, and belongs to the technical field of industrial robots. The robot comprises a bearing moving system, a displacement system, a locking system, a feeding system, a feedback system and a control system. According to the dismantling robot, four feeding boxes are mounted on a machineframe, and the dismantling of the residual refractory brick is completed by using the coordination work of all systems; and the dismantling robot is a very typical electro-mechanical integrated system, technologies such as mechanical, electronic, control and sensing are integrated, the robot meets the relevant requirements of the cleaning of the residual refractory brick of the rotary kiln, the cleaning operation of the residual refractory brick can be completed efficiently, meanwhile, a kiln body is not damaged, and the automation and intelligence of the dismantling of the residual refractorybrick are achieved.

The invention discloses conductive foam suitable for electromagnetic shielding. The conductive foam sequentially comprises an outer protection layer, a foam layer, a first pasting layer, a metal foillayer and a second pasting layer, wherein the layers are combined to form the conductive foam, a nickel-titanium alloy thin film is formed on each of an upper surface and a lower surface of the metalfoil layer, leakage holes are formed in the foam layer and are filled with carbon nanotubes, the carbon nanotubes are porous spongy carbon nanotube block-shaped materials, first surfaces of the nickel-titanium alloy thin films are connected with the foam layer and the carbon nanotubes in the foam layer by the first pasting layer, and second surfaces of the nickel-titanium alloy thin films are connected with the second pasting layer. In the conductive foam provided by the invention, relatively excellent integral shielding performance and conductive performance can be provided for electronic equipment in a closed and narrow space with poor cooling performance.

The invention discloses a robot-supported flexible arm tunnel boring machine (Robot-TBM) with multiple cutters boring tunnels with arbitrary cross sections, so as to meet the boring needs of diversified tunnel cross sections at present and make up for the single shortcomings of cross section boring by the existing tunnel boring machine. The robot-supported flexible arm tunnel boring machine (Robot-TBM) with multiple cutters boring tunnels with arbitrary cross sections comprises a cutter system and a main beam, wherein the rear part of the main beam is connected with the front part of a rear support shoe through a thrust cylinder, and the rear part of the rear support shoe is connected with a rear support; the front part of the main beam is connected with the cutter system through a robot;and the cutter system comprises at least three cutters. Due to the combined cutter system structure with multiple cutter moments coupled, the stress generated during working can be offset, the structure is optimized, and the cost is reduced.

The invention discloses a compound technique capable of improving the wear resistance and fatigue resistance of an engine gear. According to the structural form of the gear, a machining path for carburization-laser shock peening is designed, and the machining demands of different positions are met. The compound technique specifically comprises the steps of 1, adopting a gas carburization technology for conducting carburization treatment on the surface of the gear; 2, conducting quenching and tempering treatment on the gear obtained after carburization treatment in step 1; 3, conducting laser shock peening treatment on the gear obtained after quenching and tempering treatment in step 2, and determining parameters of laser shock peening such as the laser wavelength, pulse width, power density, shock frequency and shock angle according to the features of materials adopted by the gear, wherein during laser shock peening treatment, the diameter of light spots is 2.4 mm, and the overlap rateof the light spots is 50%. By means of the compound technique, the technological advantages of carburization and laser shock peening are comprehensively utilized, the surface hardness and residual compressive stress of the aeroengine transmission gear are effectively increased, thus the wear resistance and fatigue performance are improved, and the requirement of industrial application is met.

The invention discloses a method for preventing peeling of a photoresist. The method is used after an ion implantation process and before an etching process, and specifically comprises the following steps: 1) carrying out treatment on a silicon substrate surface, so that the silicon substrate surface not coated with the photoresist is changed to be hydrophilic; 2) treating the silicon substrate surface by employing water, so that a silicon substrate not coated with the photoresist absorbs the water and is expanded; and 3) carrying out curing treatment on the photoresist. According to the method disclosed by the invention, after the ion implantation, through firstly treating the silicon substrate surface by employing an ASH plasma so that the exposed silicon substrate surface is changed to be hydrophilic, and then treating the silicon substrate surface by employing the water so that the exposed silicon substrate absorbs the water and is expanded, a stress produced by colloid shrinkage when UVC is cured is offset; and thus, the photoresist, when being etched, is prevented from occurring the peeling with the silicon substrate, and the etching is guaranteed to obtain good graphics.

The invention provides a growth method of a light emitting diode epitaxial wafer and the light emitting diode epitaxial wafer, and belongs to the technical field of semiconductors. The growth method comprises the following steps: putting a sapphire substrate into a reaction chamber; introducing a reaction gas into the reaction chamber, and forming a GaN crystal nucleus containing In atoms in a partial region of the sapphire substrate; at least one composite layer grows on the GaN crystal nucleus, the GaN crystal nucleus grows to form a buffer layer, and each composite layer comprises an InGaNsub-layer and a GaN sub-layer growing on the InGaN sub-layer; and sequentially growing an N-type GaN layer, an active layer and a P-type GaN layer on the buffer layer to form an epitaxial wafer, wherein the active layer comprises InGaN quantum wells and GaN quantum barriers which are alternately stacked. By forming the GaN crystal nucleus which is large in size and stable, stress generated by lattice mismatch between the sapphire substrate and the GaN-based material is effectively counteracted.

The invention discloses a double-curing one-component bamboo wood waterproof coating. The coating comprises the following components, in parts by weight: 30-98 parts of acrylic resin containing activeisocyanate groups, 0-60 parts of a reactive diluent, 0.5-10 parts of a photoinitiator, and 0.1-2 parts of a water removing agent. The invention also provides an application of the above double-curingone-component bamboo wood waterproof coating. The waterproof coating provided by the invention can be widely applied to waterproof treatment of wood products such as wood floors, wood furniture and veneer and bamboo products, has a simple production process and rapid curing, does not contain volatile organic compounds, is environmentally friendly and safe, and has firm combination with wood and excellent waterproof and anti-cracking effects.

The embodiments of the invention disclose a foamed decorating plate production device and method. The foamed decorating plate production device comprises a discharging part, a segmented cooling part,a flattening part and a receiving part, wherein the discharging part comprises an extrusion die head for extruding a material body into a template prototype; and the segmented cooling part at least comprises an indirect cooling structure, a temperature rising structure and a blowing cooling structure which are sequentially arranged in the conveying direction. The production method comprises the steps that raw materials are mixed, heated and then cooled; after being subjected to extrusion molding, the mixed raw materials are cooled by a contact cooling structure, then sent into the temperaturerising structure to be reheated and then cooled by the blowing cooling structure; after being flattened by the flattening part, the cooled template prototype is pulled into the receiving part for cutting and receiving; the temperature of cooling water in the contact cooling structure is 40-60 DEG C; and in the reheating process, the temperature in the temperature rising structure is 80-85 DEG C. The effects that shrinkage deformation is avoided, the effectiveness of the cooling process is ensured, the physical and chemical properties are improved, and the product quality is improved are realized

The invention discloses a full-automatic production line and method for finished spooled yarn sorting, film sealing and packaging. The full-automatic production line comprises a feeding structure, a weight disc assembling mechanism is fixedly mounted on one side of the feeding structure, a film feeding mechanism is fixedly mounted on one side of the weight disc assembling mechanism, a film sealingmechanism is fixedly mounted on one side of the film feeding mechanism, and a turnover mechanism is fixed on one side of the film sealing mechanism. The full-automatic production line and method serve for products of domestic and overseas textile enterprises, the full-automatic production line and method for sorting, film sealing and packaging of finished spooled yarns well solve the problem of labor consumption in the finished yarn packaging link, and a better solution is provided for solving the problems that labor is difficult and expensive, and management is difficult and the like of thetextile enterprises after epidemic, full automation of the whole process from finished yarn sorting to film sealing, turning over and packaging is achieved, participation of people is reduced, workshop management is facilitated, and quality control over spooled yarn packaging by enterprises is improved; and the requirement for operators is low, and a simple operation interface is easy to master.