68results about How to "Process defect reduction" patented technology

The invention relates to a carriage longitudinal beam tailor welding tool. The carriage longitudinal beam tailor welding tool comprises a fixing frame and a first stand column which is fixed on the edge of one side of the fixing frame, wherein the edge of the other side of the fixing frame is fixedly connected with the lower portion of a second stand column, a regulating rod is fixed on the edge of the position, between the first stand column and the second stand column, of the fixing frame, and a base plate is fixedly connected with the surface of one end of the fixing frame. The carriage longitudinal beam tailor welding tool has the advantages that a part to be welded is accurately located and reliably clamped, so that the part to be welded is conveniently assembled and welded, and structural accuracy of the part to be welded is improved.

The invention discloses a casting method of a ZL101 thin-wall aluminium alloy part. The method includes steps of: 1) preparing moulding sand raw materials; 2) preparing binder slurry, wherein the binder slurry comprises 36-40% by weight of starch, 6-8% by weight of furan resin, 14-16% by weight of calcium bentonite, 3-5% by weight of bagasse cellulose powder having a size of -100 meshes, 1-2% by weight of zinc stearate and 2-3% by weight of sodium tripolyphosphate, with the balance being water; 3) preparing moulding sand; 4) manufacturing a casting and gating system; 5) smelting a ZL101 alloy, wherein 0.035% of Sr is added for modification, argon is fed after slag removal, gas removal is performed by rotation, smelting is performed when the temperature is 735-745 DEG C, and the alloy is allowed to stand for 10-12 min after smelting; 6) casting, wherein the aluminum alloy casting temperature is controlled to e 720-730 DEG C, and the casting speed is controlled in a manner that the former two fifth of the total casting amount adopts a speed of 6-8 kg/s, the middle two fifth adopts a speed of 4-5 kg/s, and the last one fifth adopts a speed of 6-8 kg/s; and 7) cooling with the mould, opening the mould, cleaning and performing thermal processing.

The invention discloses a tailored welding tool for landing leg supports of hooklifts. The tailored welding tool comprises a supporting base board and a first positioning base, a second positioning base, a plurality of landing leg base plates, a plurality of drawing arm base plates and a third positioning base which are fixed on the supporting base board. The tailored welding tool can overcome the defects of the landing leg supports of having deviation easily and being difficult to adjust and poor in stability during tailored welding.

The invention provides a hafnium silicate environment barrier coating for a ceramic-based composite material matrix and a preparation method thereof. The preparation method comprises the following steps: (1) mixing HfO2 and SiO2, carrying out wet mixing and ball milling on a ball mill, drying, grinding, sieving, sintering, and carrying out a high-temperature solid-phase reaction; (2) after the high-temperature solid-phase reaction is finished, adding deionized water for slurry preparation, then performing ball milling, and performing spray granulation to obtain an HfSiO4 powder material; (3) firstly spraying a Si layer on the surface of a ceramic-based composite matrix as a priming coat, and then spraying the HfSiO4 powder material on the surface of the priming coat as a surface layer to form a multi-layer coating; and (4) carrying out a heat treatment on the multi-layer coating to obtain the environmental barrier coating. Due to the added heat treatment, the crystallinity of the HfSiO4 surface layer is improved, the binding force of each layer of the coating is better, the stability is higher, and the water and oxygen resistance of the environment barrier coating is greatly improved. The provided preparation method is simple and easy to control, and is easy for industrial production and application.

The invention discloses a method for manufacturing a shallow groove isolation structure, which comprises: forming a hard mask of which an opening exposes from a substrate, and oxidizing the substrate in an oxygen atmosphere; and forming a shallow groove on the substrate at the position of the opening by a dry etching method after the oxidation treatment. The method for manufacturing the shallow groove isolation structure can form a relatively round shallow groove top chamber and reduce the probability of process defects.

The invention discloses a process method for carrying out bead welding on steel with aluminum bronze. The process method comprises the following steps that firstly, a stainless steel wire wheel is used for removing an oxidation film on a face to be subjected to bead welding of a bead welding workpiece; then, overall preheating is carried out on the bead welding workpiece, the preheating temperature is 150 DEG C-200 DEG C, and the temperature is kept for 0.5-1 hour after preheating; and next, arc blowout plates are additionally arranged on the two sides of the face to be subjected to bead welding, continuous welding is carried out on the bead welding workpiece through consumable electrode inert gas shielded welding, the bead welding interlayer-temperature is larger than or equal to 150 DEGC, reasonable welding materials and welding process parameters are selected, after welding is completed, annealing heat treatment is carried out on the bead welding workpiece, the initial temperatureis 100 DEG C-150 DEG C, the temperature is kept for 2-2.5 hours after the temperature is gradually raised to 300 DEG C-400 DEG C, the temperature is kept for 1-1.5 hours after the temperature is raised to 500 DEG C-560 DEG C, and after the bead welding workpiece is cooled to 200 DEG C along with a furnace, the bead welding workpiece is output out of the furnace to be subjected to air cooling to the room temperature. By means of the design, the bead welding quality is good, and the bead welding quality is high.

The invention provides a double-vertical-channel transistor, an integrated circuit memory and a preparation method thereof. A first trench extending along a first direction is formed in the vertical fin; first source/drain regions are formed in the fins at the tops of the two sides of the first trench; a second source/drain region is formed in the fin at the bottom of the first trench; a first gate structure is filled in the first trench and extends along the first direction; the embedded wires are filled in the second trench in the side wall, extending along the second direction, of the vertical fins, so that the first source/drain regions on the two sides of the first trench and the second source/drain region at the bottoms of the first trench respectively form double vertical L-shaped channels, the effective channel length is increased, and the short channel effect is overcome; and the second source/drain region and the electric connection embedded wire thereof are positioned at thebottom of the transistor and do not need to be directly led out from the upper surface, so that isolation at the periphery of the transistor is easier to form, the device area is reduced, the processis simplified and the performance is improved.

In a system or method for controlling wafer back-grinding, a chuck table has a surface for supporting a semiconductor wafer during a back-grinding process, one or more holes in the surface, and one or more sensors disposed in the one or more holes for monitoring a parameter during back-grinding. A computer-implemented process control tool is coupled to receive one or mote outputs from the one or more sensors and control the back-grinding process based on the received one or more outputs. The system and method for wafer back-grinding control can effectively reduce process defects and enable the thickness of the semiconductor wafer to be consistent in the process of back-grinding.

The invention discloses a preparation technique of a SiGe Bi-CMOS appliance. The step of forming a side wall and a metallic silicide barrier layer of the SiGe Bi-CMOS appliance comprises the following steps of: 1, depositing a dielectric film layer; 2, spin-coating a negative photoresist; 3, exposing with a photomask of the metallic silicide barrier layer to form a metallic silicide barrier layer pattern; 4, etching to form the side wall and removing the dielectric film layer on the non-metallic silicide barrier layer at the same time; 5, growing the dielectric film layer protecting the CMOS appliance; 6, photoetching and etching to open a Si/Ge growth zone; and 7, performing the subsequent Si/Ge appliance forming process. In the invention, the side wall and the metallic silicide barrier layer are formed through photolithography at one time by photoetching the metallic silicide barrier layer with the negative photoresist, so that the process flow is simplified and the yield and reliability of the appliance are improved.

The invention discloses a rear compartment door tailor welding tool which comprises a compartment tailor welding base plate, a fixing compression mechanism, clamping mechanisms and a hanging lug mold. The fixing compression mechanism comprises a compartment positioning assembly, a plurality of compartment compression assemblies and a plurality of compartment adjusting assemblies, wherein the compartment positioning assembly is fixed to the upper surface of the compartment tailor welding base plate so as to position a rear compartment door, the compartment compression assemblies are fixed to the two sides of the compartment tailor welding base plate so as to compress the rear compartment door, and the compartment adjusting assemblies are fixed to the surface of the periphery of the compartment tailor welding base plate. The clamping mechanisms are fixed to the front end and the rear end of the upper surface of the compartment tailor welding base plate and matched with clamping portions of the rear compartment door. The hanging lug mold is fixed to the front end of the compartment tailor welding base plate and matched with a hanging lug at the front end of the rear compartment door. According to the rear compartment door tailor welding tool, the problems that deviation is prone to occurrence, adjustment is difficult and stability is poor when manual tailor welding is adopted can be solved, and therefore welding quality can be improved.

The invention discloses an etchant composition which includes: 10-20 weight % of persulfate; 0.1-10 weight % of phosphoric acid (H3PO4) or phosphorous acid (H3PO3); 0.1-2 weight % of nitrogen-based ring compounds; 0.1-5 weight % of sulfoacid compounds; 0.1-2 weight % of copper corrosion-inhibitive agents; 0.1-2 weight % of fluorine compound; and residual water which together with the other components constitute a total weight of 100 weight %. The invention also discloses a method of manufacturing metal wiring using the etchant composition.

Mortar for packing and pouring is composed of 20%-50% of Portland cement, 2%-30% of a volume stabilizer, 2%-30% of a mixing material, 16%-65% of sand, 1.5%-3% of cellulose ether, 0.01%-2% of an air entraining agent, 0.2%-5% of a thixotropic lubricant, 1%-6.0% of redispersible latex powder, 0.2%-0.25% of a water reducer, and 0.15%-0.25% of a retarder. The mortar has good adhesion power, high strength and high impermeability, and has the 14 d bonding strength of more than or equal to 0.6 MPa, the 28 d flexural strength of more than or equal to 3.5 MPa, the 28 d compressive strength of more thanor equal to 21 MPa, the shrinkage rate of less than -0.04%, and the impermeability of more than or equal to 2.1 MPa. The mortar can solve the technical problems of cracking and leakage from the material, is simple and feasible in operation method, and convenient and simple in use process, has tools matched for use, is more dense in filling, can greatly reduce process defects from the process, reduces leakage risks, and is suitable for industrialized production and market promotion use.

The invention belongs to the technical field of ceramic glaze preparation, and particularly relates to a composition for preparing matte white glaze, and a firing method of the matte white glaze. According to the matte white glaze provided by the invention, slag powder, calcined kaolin and talc are matched for use, so that the problem that bubbles are generated on the glaze due to the fact that alarge amount of gas is released in the slag powder firing process can be avoided, the texture of the glaze is improved, the roughness of the glaze is improved, the thermal expansion coefficient of theglaze is adjusted, and the problem that the glaze cracks due to the fact that a large amount of slag powder is added into the glaze is reduced; the slag powder has high fluidity under a high-temperature firing condition, and the calcined kaolin and the talc are matched for use, so that bubbles generated on the glaze surface can be inhibited while the problem of high fluidity of the slag powder ata high temperature is controlled, the glaze surface is smooth, and the glaze surface texture is improved; and a large amount of slag powder can be utilized to realize recycling of the slag powder, and environmental pollution and resource waste can be effectively reduced.

The embodiment of the invention discloses an LDMOS device and a manufacture method of the device. The method comprises providing a substrate including a body layer, an epitaxial layer and a deep well region located in the epitaxial layer; sequentially forming an isolation medium layer and a hard mask layer on the epitaxial layer; forming a shallow trench in the deep well region in the epitaxial layer by using a mask with a drift region pattern; and forming a shallow trench medium layer in the shallow trench. The LDMOS device manufacture method provided by the invention can manufacture devices with a key dimension of 0.18 mum or below, and can realize global planarization of the substrate surface when carrying out subsequent CMP (chemical mechanical polishing) process, thereby reducing the occurrence of process defects.

The invention relates to a compressor welding tool which comprises a locking and supporting box positioning die component, extruding plate rotating shaft seat positioning dies and extruding oil cylinder seat positioning dies. The locking and supporting box positioning die component is fixed on one side of a base platform, the extruding plate rotating shaft seat positioning dies are oppositely fixed on the other side of the base platform, and the extruding oil cylinder seat positioning dies opposite in direction are fixed on the base platform between the locking and supporting box positioning die component and the extruding plate rotating shaft seat positioning dies. The compressor welding tool has the advantages that to-be-welded components are enabled to be accurately positioned and reliably clamped, assembling and welding of a to-be-welded piece are facilitated, structural accuracy of the to-be-welded piece is improved, and the like.

The invention discloses a wafer surface charge eliminating device. A shell of the wafer surface charge eliminating device forms a closed cavity; a partition plate is fixed in the middle of the shell,and isolates the closed cavity formed by the shell into a closed upper chamber and a closed lower chamber when the partition plate is unfolded; the side wall of the shell at the lower chamber is provided with a wafer placement door that can be opened and closed; an upper pole plate is disposed in the upper chamber and parallel to the partition plate; the shell is an insulating material; the upperpole plate and the partition plate are both conductive materials; the upper pole plate is connected to an upper electrode; the partition plate is connected to a lower electrode; a charge measuring device and a worktable capable of lifting and rotating are placed in the lower chamber; and the side wall of the upper chamber is provided with a ventilation interface. The invention also discloses a wafer surface charge eliminating method of the wafer surface charge eliminating device. The invention can eliminate the interference of wafer surface charges on manufacturing and measurement processes, reduce process defects, and improve the measurement pattern accuracy.

The invention provides an algorithm for adding and optimizing a redundant graph. The algorithm comprises the following steps of: searching a positive abnormal region and a negative abnormal region ofa version graph; optimizing the redundant graph of the positive abnormal area and optimizing the redundant graph of the negative abnormal area for the graph of the positive abnormal area; enabling thechemical mechanical planarization model to predict the surface topography of the optimized redundant graph; and if the predicted surface topography reaches a set value, successfully optimizing the redundant graph added in the layout. According to the method, the existing redundant graph is optimized, and the surface appearance of the redundant graph predicted and optimized by the chemical mechanical planarization model is used as a feedback means of the added redundant graph, so that the uniformity of local graph distribution of layouts of different layers among different products can be optimized, and the optimization effect of redundant graph addition is further improved; and the uniformity of the surface morphology of each layer after process machining is improved, and the process defects of the subsequent manufacturing process are reduced.

The invention relates to an automobile front combination lamp sealing structure which comprises a headlamp mask, a plurality of lamplet masks arranged in the headlamp mask and connected with the headlamp mask, light guide plates arranged in the lamplet masks and circuit boards arranged at the rear ends of the light guide plates, and is characterized in that inner clamping parts are arranged on the inner side of the headlamp mask; outer clamping parts are arranged at the rear parts of the lamplet masks; the outer clamping parts of the lamplet masks and the inner clamping parts of the headlamp mask are correspondingly clamped to form U-shaped glue grooves; sealant is coated in the rubber grooves; a rubber rib is arranged at the rear end of the light guide plate, and the rubber rib at the rear end of the light guide plate is inserted into the rubber groove coated with the sealant to form a complete local sealing structure. A complete local sealing structure can be formed, the problem that fogging on the local area of the surface of the lamp mask cannot be eliminated is solved, the appearance quality of the automobile lamp is improved, and the product percent of pass is increased; and the processing procedure can be simplified, and the processing cost is reduced.

The invention discloses a compartment suspension loop mold. The compartment suspension loop mold comprises a compartment fixing rack, two first fixed pin shafts, two second fixed pin shafts, and two third fixed pin shafts, wherein the compartment fixing rack is matched with a compartment opening of the compartment in a sleeving way; a bottom support steel channel clamped with an inner bottom plate of the compartment is arranged on the compartment fixing rack; the two first fixed pin shafts are respectively arranged on two sides of the lower part of the compartment fixing rack, and are used for fixing and locating two first suspension loops on the lower end of the compartment; the two second fixed pin shafts are respectively arranged on two sides of the middle part of the compartment fixing rack, and are used for fixing and locating two oil cylinder bases in the middle of the compartment; the two third fixed pin shafts are respectively arranged on two sides of the upper part of the compartment fixing rack, and are used for fixing and locating two second suspension loops on the upper part of the compartment. According to the device, the concentricity of the suspension loops and the oil cylinder base can be ensured, the dimension error is reduced, and the quality of the welded compartment suspension loops and the oil cylinder base is higher.