51results about How to "Reduce sag" patented technology

The invention discloses a mask plate and a manufacturing method. The mask plate comprises a first zone and a second zone; the first zone is used for positioning, a welding positioning part between the mask plate edge and a mask plate frame (or support) is provided with a second groove, and the welding positioning part faces back to a substrate and is in the first zone, and the second groove is capable of accommodating one or multiple welding positioning devices; the second zone comprises shielding parts and opening parts which are uniformly arranged at intervals in a parallel manner, the side, facing to the substrate, of each shielding part is provided with first grooves, and each groove is parallel to the opening parts in the longitudinal direction or in the transverse direction. The invention also discloses a preparation method of the mask plate on which the first grooves and the second grove are arranged, and a wet-process etching method is employed. The mask plate has the advantages of light mass, good strength, reduced substrate damages and the like.

A plurality of movable temporary hangers 7 are placed on a stay cable 4B hung in tension above a target stay cable 4C, and then the target stay cable 4C is held on a lower portion of the temporary hangers 7. Then, the target stay cable 4C held with the temporary hanger 7 is detached from a bridge deck 3 and a main tower 2. Then, the target stay cable 4C and the temporary hangers 7 holding the target stay cable 4C are moved toward the bridge deck 3 and removed.

The invention discloses a far infrared anti-ice and snow bunched aerial insulated cable. The cable is characterized by comprising an aerial insulated wire core and a far infrared heating body wire core, wherein the aerial insulated wire core is wrapped in an outer sheath layer and formed by a plurality of metal conductors wrapped by insulating material layers respectively; and the far infrared heating body wire core is formed by at least one far infrared heating conductor wrapped by a heating and insulating material layer. Compared with the prior art, the cable has the advantages of good anti-ice and snow effect, high heating speed, low power consumption, light weight and capability of relieving sag of the aerial insulated cable and effectively reducing the manufacturing cost and the laying cost.

The invention discloses a method for constructing a copper wire on a wafer, which comprises the following steps of: depositing a first interlayer dielectric on the upper surface of the wafer; constructing a second interlayer dielectric on the upper surface of the first interlayer dielectric of the wafer, wherein the hardness of the second interlayer dielectric is lower than that of the first interlayer dielectric; photoetching the second interlayer dielectric and the first interlayer dielectric to define a groove structure, wherein the bottom of the groove structure is positioned in the first interlayer dielectric; sequentially depositing a barrier layer and a copper seed crystal layer on the upper surface of the wafer and the inner wall of a groove; depositing copper on the upper surface of the wafer, wherein the copper is filled in the groove to form the copper wire; and performing chemical mechanical polishing (CMP) on the wafer to reach the first interlayer dielectric so as to make the upper surface of the wafer subjected to planarization. The invention also discloses a CMP method for the copper. The sinking degree of the surface of the copper wire constructed by the scheme of the invention is reduced to a certain extent compared with that of the prior art.

The invention discloses a chemical mechanical grinding composition, which comprises the following parts with pH value between 2 and 5: aqueous dielectric, grinding material, etching inhibitor, surface activator, diacid compound and residual metal inhibitor, wherein the residual metal inhibitor is composed of the compound as formula (I), compound as formula (II), compound as formula (III), compound as formula (IV), compound as formula (V) and these compound composition; the structure of formula (II)-(V) and the definition of each substituted group are limited by instruction and power requstment; the chemical mechanical grinding composition can be used on the grinding semiconductor crystal circle surface, which can obtain not bad metal grinding velocity and reduce metal pit and residual metal effectively.

The invention discloses a harvester, comprising a walking mechanism, a power device which is used for providing power to the walking mechanism, a threshing component, a harvesting component, a seedling pulling component and a suspension device which is connected with the walking mechanism through a connector, wherein the connector is capable of realizing the height adjustment and transverse rotation of the suspension device; and the threshing component, the harvesting component and the seedling pulling component are located on the suspension device. According to the invention, through adaptation, the center of gravity of the harvester is borne by the suspension device without inclining, so that the extent of sinking is decreased, the other weight does not press on the walking mechanism and then the inclination of the walking mechanism is decreased.

The invention provides an energy-saving conveying device based on reduction of friction force. The energy-saving conveying device comprises two supporting side plates for supporting equipment, a supporting plate for connecting the two supporting side plates, a double-row conveying mechanism for conveying objects and an air-pressure progressive balance mechanism for reducing surface indentation friction force. The two supporting side plates are distributed in parallel, and a supporting plate is fixedly connected between the two supporting side plates. The invention relates to the field of conveying devices. According to the energy-saving conveying device based on reduction of the friction force, a special conveying mechanism and a special supporting structure are designed for solving the problem that an existing conveying crawler belt is too heavy and sunken in use. The sunken surface is reduced by strengthening the supporting force, and therefore the problems are effectively solved that when a common conveying device conveys large objects, surface indentation occurs, the friction resistance is large when the conveying belt makes contact with the shaft face of a conveying shaft, thedriving energy consumption is increased, the conveying belt is prone to being damaged, and limitations exist in most existing processing modes.

The present invention relates to a step type infrared detector. A CMOS measurement circuit system and a CMOS infrared sensing structure in the infrared detector are both prepared by using a CMOS process, and in the infrared detector, the position, corresponding to a columnar structure, of the surface, close to the CMOS measurement circuit system, of a suspended micro-bridge structure is in a stepped shape. The surface, not in contact with the columnar structure, of the suspended micro-bridge structure is higher than the surface, in contact with the columnar structure, of the suspended micro-bridge structure, the columnar structure is a solid columnar structure, and the reinforcing structure corresponds to the columnar structure and is located on the side, away from the CMOS measuring circuit system, of the columnar structure. According to the technical scheme, the problems of low performance, low pixel scale, low yield, poor consistency and the like of a traditional MEMS process infrared detector are solved, the sinking degree of the middle area of the sacrificial layer is effectively reduced, the planarization degree of the whole infrared detector is optimized, and the structural stability of the infrared detector is improved.

The invention relates to a lock catch plate punching die. The lock catch plate punching die comprises an upper die assembly and a lower die assembly which are connected to each other. The upper die assembly is provided with a punch (9), and the punch (9) is provided with a die cutter opening. A lower die inlet block (10) for assisting punching is arranged at the position, corresponding to the punch (9), in the lower die assembly. A workpiece (11) to be punched is fixedly arranged on the lower die assembly. A stripping plate (5) is arranged below the upper die assembly. Nitrogen springs (12) for assisting stripping are arranged between the stripping plate (5) and the upper die assembly. A lower die cushion block (13) connected with the lower die inlet block (10) is arranged below the lower die inlet block (10). Compared with the prior art, the lock catch plate punching die has the beneficial effects of being high in production efficiency, good in product quality, low in maintenance cost and the like.

The invention discloses bulletproof composite armor and a preparation method thereof, and belongs to the technical field of composite materials. The preparation method of the bulletproof composite armor comprises the following steps that S1, multiple layers of ultra-high molecular weight polyethylene UD cloth are stacked, the outer edge of a stacked object is fixed through a clamp, and then the stacked object is heated and stretched in the horizontal direction to generate prestress; and S2, under the condition that the heating state and the stacked object stretching state are kept, a bulletproof ceramic plate, an adhesive, a crack arrest layer, an adhesive and the stacked object are vertically pressurized, hot-pressed and compounded in the Z direction, finally cooling is conducted to the room temperature, and the bulletproof composite armor is obtained. The prepared bulletproof composite armor is of a ceramic layer/crack arrest layer/ultra-high molecular weight polyethylene UD cloth stacked layer structure, the ultra-high molecular weight polyethylene UD cloth stacked layer has certain prestress, the sinking degree can be reduced after the bulletproof composite armor is stuck by a bullet, and therefore a better protection effect is achieved.

The invention discloses an auxiliary supporting device for a machine tool beam screw rod and relates to the technical field of machinery manufacturing. The auxiliary supporting device is installed between a machine tool transverse sliding plate and a beam. A fixing support is arranged on the machine tool beam. A movable bracket is connected on the fixing support in a pressing mode and provided with a supporting block which is used for supporting the screw rod. The fixing support is provided with a horizontal first through hole, wherein the first through hole is sequentially provided with a spring, a pin and a bearing. One end, close to the spring, of the first through hole is provided with a sealing plate. The movable bracket is provided with a second through hole. The bearing is arranged in the first through hole of the fixing support and the second through hole of the movable bracket. A lifting pin is arranged in the second through hole. One side of the second through hole is provided with a third through hole. The third through hole is provided with a shaft and a bearing, wherein the bearing abuts against a guiding plate which is provided with a guiding groove, and the bearing extends into the guiding groove of the guiding plate. The auxiliary supporting device for the machine tool beam screw rod can solve the problems that the supporting device for the heavy machine tool beam screw rod is complex in structure and high in production cost and can only support partial drooping screw rods.

A novel rotary-wing aircraft is composed of main body, mainshaft, rotary wings, horizontal drive clutch, power system, rear wings and horizontal drive propeller. The rotary wings fixed to top end of mainshaft are adjustable-pitch torsional blades and used for vertical taking off or landing. Said horizontal drive propeller is used for horizontal flying. Its advantages are high safety and efficiency, and low cost and noise.

The invention discloses a process for paving a latticed pavement of a pedestrian walkway. The process mainly comprises the following steps of (1) paving steel bars with groove-shaped sections on a foundation after tamping the foundation, and then, filling lumpy macadam between every two steel bars, wherein the height of each steel bar is not smaller than 15cm, through holes are formed in each steel bar, a layer of geotechnical cloth is paved in the groove of each steel bar, the size of the lumpy macadam is not larger than 10cm, and the paving thickness of the lumpy macadam is not smaller than 20cm; (2) after finishing the operation of paving the lumpy macadam, paving more than one layer of geotechnical cloth between every two adjacent steel bars, and fixing the ends of the geotechnical cloth on the steel bars; and (3) after finishing the operation of paving the geotechnical cloth, paving a layer of fine sand with the thickness of 10-20cm on the geotechnical cloth, and paving face bricks on the fine sand by using concrete after finishing the operation of paving the fine sand. The process has the advantages of rapidly draining water and reducing uneven conditions caused by different subsidence degrees at different positions of the layer below the face bricks.

The invention discloses a composite papermaking felt and a preparation method thereof, the composite papermaking felt comprises a first composite fiber layer and a second composite fiber layer, and the second composite fiber layer is laid on the first composite fiber layer; wherein the second composite fiber layer is provided with a plurality of wool layers, needling traces are formed on the wool layers, and the depths of the needling traces are gradually reduced along with the increase of the number of the wool layers. Through a special flocking needling method, the manufactured composite papermaking felt is not prone to hair falling, the smooth and fine effect of the felt is guaranteed, and the composite papermaking felt is particularly suitable for papermaking of paper products such as decorative paper, cultural paper and tissue paper with the high flatness requirement.