30results about How to "Does not affect injection" patented technology

The invention discloses a traction, rolling and unrolling device of a heat preservation quilt for a solar-panel greenhouse. The traction, rolling and unrolling device comprises the solar-panel greenhouse, an unrolling device, a rolling device and the heat preservation quilt, wherein the top of the solar-panel greenhouse is arched; the unrolling device and the rolling device are respectively arranged on the two lateral walls of the solar-panel greenhouse; one end of the heat preservation quilt is fixedly provided with an unrolling guide rod, and the other end of the heat preservation quilt is fixedly provided with a plurality of evenly-distributed rolling ropes; the unrolling guide rod is fixedly provided with a plurality of evenly-distributed unrolling ropes; the other ends of the unrolling ropes are fixed onto the unrolling device; the other ends of the rolling ropes are fixed onto the rolling device; a pair of guide plates in front-rear symmetry are arranged on the front and rear lateral walls in the length direction of the solar-panel greenhouse; the unrolling guide rod is slidably arranged on the guide plates. By the traction, rolling and unrolling device, the heat preservation quilt is flat and smooth when being unrolled at the top of the solar-panel greenhouse, and a better heat preservation effect is achieved; when the heat preservation quilt is rolled, the heat preservation quilt is stored at the lower end of the lateral wall of the solar-panel greenhouse, and sunlight incidence is unaffected.

The invention discloses an experimental system and a method for simulating a composite load of an explosion shock wave and a single fragment. The method comprises steps of: determining parameters, such as the density and the length of a foamed aluminum projectile, the diameter and the depth of an opening, the length and the diameter of a fragment simulated projectile, and the launch speed of a composite projectile, according to the composite load parameters of the shock wave and the fragment desired simulated; preparing a composite projectile based on the determined composite projectile parameters; and ejecting the prepared composite projectile out of the primary light gas gun at the determined speed, thereby forming a composite load of the shock wave and the single fragment desired simulated. According to the experimental system and the method for simulating the composite load of the explosion shock wave and the single fragment a method for scientific researchers and engineering designers to simulate the explosive power of an explosive device with a shell is provided. The method can be widely applied to the simulation test of explosive impact loads in the fields of the transportation, the safety protection, the military, and the like; can effectively save the test cost; and has considerable economic benefits.

The invention discloses an LED chip and a manufacturing method of the LED chip. The LED chip comprises a substrate, a buffer layer, an N-type layer, a quantum well, an electronic barrier layer, a P-type layer, a passivation layer, a P electrode and an N electrode, wherein the buffer layer is formed on the substrate, the N-type layer is formed on the buffer layer, the quantum well is formed on the N-type layer, the electronic barrier layer is formed on the quantum well, the P-type layer is formed on the electronic barrier layer, the passivation layer is formed on the P-type layer, the P electrode penetrates from the lower surface of the substrate to the lower surface of the P-type layer, and the N electrode penetrates from the lower surface of the substrate to the lower surface of the N-type layer. The LED chip has the advantages of being high in light out-coupling efficiency, good in heat dissipation performance and low in manufacturing cost.

The invention discloses a multifunctional positioning injection device for internal secretion diseases. The device comprises a main frame, fixing bases are arranged at the two ends of the bottom surface of the main frame, the main frame is in sliding connection with the fixing bases, a positioning device is arranged on the main frame, and the positioning device is in sliding connection with the main frame; a rough adjusting groove which is vertically through is fixedly formed in the positioning device, an abutting base is arranged in the rough adjusting groove, and the abutting base is in threaded connection with the positioning device; a vertically through fine adjusting groove is fixedly arranged in the abutting base, and a fine adjusting device is arranged in the fine adjusting groove;the fine adjusting device is in threaded connection with the abutting base, and a vertically through needle cylinder groove is fixedly formed in the fine adjusting device; a buffer block is arranged in the needle cylinder groove, and a massage device is arranged between the fixing bases; the massage device is detachably connected with the fixing bases; the massaging device is easy to operate, saves labor, and reduces the working pressure of medical workers; the main frame, the fixing bases, the abutting base and the positioning device are combined to realize positioning injection; the fine adjusting device is used for realizing the control over injection; the buffer block of the fixed needle cylinder is coated with an anti-skid layer, so that the fixing effect is guaranteed.

The invention discloses a display device with a built-in pixel compensation function, a display panel and a manufacturing method thereof. The display panel comprises a substrate, an electroluminescentEL device, a driving backboard of the EL device arranged between the EL device and the substrate, and a light detection unit arranged between the driving backboard and the substrate; a light hole arranged in a reflecting anode of the EL device is opposite to a photosensitive detection element in the light detection unit; the light detection unit is used for detecting a brightness signal of the ELdevice through the light hole, and an electric signal which is used as the pixel compensation evidence is output. The real-time Demura compensation is performed by applying the display device, the light of the EL element cannot be shielded, an opening rate of the top emission OLED device is improved, and a display effect of the display device cannot be influenced.

The invention discloses a rolling device for a sunlight sheet greenhouse insulation quilt. The device comprises a sunlight sheet greenhouse, a quilt rolling device, a clinging device and insulation quilts. The top portion of the sunlight sheet greenhouse is in arc shape. The quilt rolling device comprises a pair of rolling units arranged on the front and rear side walls located in the length direction of the sunlight sheet greenhouse. The rolling units are arranged in front-rear symmetry, and are connected with rolling sticks in a pivot mode. The clinging device is arranged on the left side wall of the sunlight sheet greenhouse. A pair of insulation quilts are fixed on the rolling stick. The other end of the insulation quilt is fixed on the clinging device. The rolling device for sunlight sheet greenhouse insulation quilt can keep the insulation quilts orderly and trimmed when the insulation quilts are laid at the top of the sunlight sheet greenhouse, the insulation function can be better exercised, when the quilts are rolled up, the quilts can be folded and stored in the left upper corner of the sunlight sheet greenhouse, and the sunlight transmission is not hindered.

A fluidizing and suspension type compound burning device is provided, which relates to a burning device. The invention resolves the problem as mutual heat influence and mutual flow influence of a bubbling fluidized bed firebox and a suspension firebox of the existing burning device for the two are integrated, thus incapable of symmetrically burning two solid fuels with different grain diameters and burning activities sufficiently in one burning device. The invention comprises a bubbling fluidized bed low temperature firebox (3), a high temperature swirl suspension firebox (7) and a transition section chamber body (5); wherein, the high temperature swirl suspension firebox (7) is located over the bubbling fluidized bed low temperature firebox (3), which is communicated with upper end of the bubbling fluidized bed low temperature firebox (3) through the transition section chamber body (5) with lower end. The invention has the advantages of high burning efficiency and sufficient burning, which realizes the sufficient burning of two solid fuels of different burning grain diameters and burning activities symmetrically in one burning device.

The invention relates to the field of beef processing and discloses beef curing equipment which comprises a base, a needle seat and a handle, wherein the needle seat and the handle are mounted on the two sides of the base respectively; multiple puncture needles are arranged on the needle seat; the interior of the puncture needle is a cavity; multiple holes are formed in the outer wall of the puncture needle; a raised thorn communicated with the cavity in the puncture needle is arranged in each hole; the raised thorn is a hollow tube; the raised thorn is articulated with a linkage rod in the puncture needle; multiple through holes are formed in the side wall of the upward side of the raised thorn; the linkage rod penetrates the needle seat and base separately; the base is provided with an operation handle connected with the linkage rod; the interiors of the needle seat, handle and base are communicated cavities; the cavity in the puncture needle is communicated with the cavity of the needle seat; and the handle is connected with a curing liquid conveying pipeline. The invention is aimed at providing beef curing equipment which has a simple structure and realizes a good curing effect.

The invention discloses an insulin syringe with a needle protection structure, and relates to the technical field of medical instruments. The lower side of the driving frame is screwed with the lower side of the outer ring wall of the medicine storage tube through a hinge, and the upper side of the driving frame is connected with the upper side of the outer ring wall of the medicine storage tube through a hasp; the sealing ring is fixed on the right side wall of the medicine storage pipe and the left side wall of the driving frame; the driving pipe is inserted and fixed on the right side wall of the driving frame; the piston plate is arranged in the driving frame; the push rod is fixed on the right side wall of the piston plate, and the other end of the push rod is arranged in the driving pipe in a penetrating manner; the driving mechanism is arranged on the outer side of the pushing rod; the protective sleeve is fixed on the left side wall of the medicine storage tube and sleeves the outer side of the discharge tube; the protective insertion tube is inserted into the outer peripheral wall of the protective sleeve; the connecting spring is embedded in the peripheral wall of the protective sleeve; the limiting mechanism is embedded in the outer side wall of the protective sleeve, and the needle head can be limited in the injection process, so that the needle head cannot incline, and injection is facilitated.

The invention discloses a stereo comprehensive planting and breeding method, which comprises the following steps of: selecting a cold waterlogged paddy field or a mud field, digging a surrounding ditch on the inner side of a ridge to avoid a situation that underground water which flows out of the mouth of a spring outwards flows to become temperature regulation water, and arranging a water inlet and a water outlet on the ridge, wherein the height of the ridge is 40-50cm; independently carrying out disinfection and fertilizer application on the field; adding procambarus clarkia seeds into the field in November, and fishing in March or April in a next year; and in May in the next year, planting aquatic plants in the field. By use of the stereo comprehensive planting and breeding method disclosed by the invention, excessive digging can be avoided, a high temperature in summer is avoided in a procambarus clarkia growth stage, the procambarus clarkias stably grow due to the temperature riseof the underground water in autumn, winter and spring, and a yield is guaranteed; crabs can normally grow in June, July, August and September due to a cooling function of macrophanerophytes, herbaceous plants, floating plants and submerged plants and a function of the underground water, and the yield is guaranteed. The procambarus clarkias and the crabs independently grow in autumn and winter aswell as in spring and summer so as to avoid a common growth stage and reduce competition to be favorable for improving a survival rate and a commodity rate.

A fluidized-suspension two-stage composite combustion device relates to a combustion device. The invention solves the problem that the bubbling fluidized bed combustion chamber and the suspension combustion chamber of the existing combustion device are integrated so that the two have mutual thermal influence and flow influence, and it is impossible to fully burn the particle size at the same time in the same combustion device. Or the problem of burning two solid fuels with different reactivity. The invention includes a bubbling fluidized bed low-temperature combustion chamber, a high-temperature vortex suspension combustion chamber, and a variable-diameter chamber body. The upper end of the low-temperature combustion chamber of the bubbling fluidized bed communicates with the chamber body through the variable diameter section; the multi-layer direct-flow burners are evenly distributed on the side wall of the suspension furnace body. The invention has the advantages of high combustion efficiency and sufficient combustion, and realizes that two solid fuels with different particle diameters or different combustion activities can be fully burned simultaneously in the same combustion device.

The invention provides a local medicine delivery sustained-release preparation for treating periodontosis, and relates to a local medicine delivery sustained-release for periodontosis, and the preparation is used for solving the problem that a sustained-release preparation is poor in adhesive force. The sustained-release preparation is prepared from the following components in parts by weight: 1-5 parts of antibiotics, 50-200 parts of organic solvent, and 50-200 parts of alpha-cyanoacrylate; or prepared from 1-5 parts of antibiotics, 50-200 parts of a frame component, 50-200 parts of organic solvent, and 50-200 parts of alpha-cyanoacrylate. The sustained-release preparation can be firmly adhered in a periodontal pocket, cannot fall off along with motion of an oral cavity, has an excellent sustained-release effect, can achieve the aim of long-time uniform delivery, is easily applied by patients, and is excellent in curative effect. The local medicine delivery sustained-release preparation is applicable to the field of odontopathy treatment.

The invention discloses a solar vacuum heat collecting pipe with double expansion joints. The solar vacuum heat collecting pipe comprises the inner expansion joint, the outer expansion joint, a kovar alloy pipe, a glass pipe, a heat absorbing pipe, a supporting casing pipe, a flange and a degasser. The glass pipe and the kovar alloy pipe are connected in a fusion seal manner. The kovar alloy pipe and the outer expansion joint are connected through welding. The outer expansion joint and the flange are connected through welding. The flange and the inner expansion joint are connected through welding. The inner expansion joint and the supporting casing pipe are connected through welding. The supporting casing pipe and the heat absorbing pipe are connected through welding. The inner expansion joint and the outer expansion joint are both multi-layer type expansion joints. A fixing bolt hole and a sealing groove are formed in the flange. A vacuum heat collecting pipe body and a tracking device are fixed through the flange. The degasser is located in the kovar alloy pipe located at the end portion. The heat collecting pipe is reasonable in design, capable of improving the heat collecting efficiency, convenient to fix, firm, durable and capable of more safely running.

The invention discloses a large-displacement single-pipe layered polymer injection adjustable device. The large-displacement single-pipe layered polymer injection adjustable device comprises a measurement and adjustment tool guide-in mechanism, an injection amount adjustment mechanism and a polymer depressurization and viscosity-keeping mechanism. The measurement and adjustment tool guide-in mechanism has a guide function and a positioning function. The injection amount adjustment mechanism has the functions of spirally lifting and dropping an injection allocation core and adjusting the injection amount of the polymer depressurization and viscosity-keeping mechanism. The polymer depressurization and viscosity-keeping mechanism is provided with a spindle injection allocation runner with the depressurization and viscosity-keeping characteristics. The injection allocation core has an enough inner drift diameter to guarantee the conduction of work like profile test. Meanwhile, a bridge type passage is arranged in a layered polymer injection measurement and adjustment work barrel, and polymer injection of other layers is not affected when the current layer is tested. The large-displacement single-pipe layered polymer injection adjustable device has the characteristics of large injection amount, good viscosity-keeping performance and adjustable injection amount, realizes single-pipe layered polymer injection measurement and adjustment multi-layer injection, resolves the existing difficulties of layered polymer injection of offshore oil fields, and can effectively improve the utilization rate of polymers and the oil displacement effect.

The invention discloses a composite sofa fabric with self-cleaning and antibacterial functions. The composite sofa fabric is characterized by comprising first cotton cloth layers, second cotton clothlayers compounded on the first cotton cloth layers, and PVC film layers compounded on the second cotton cloth layers, wherein a pairs of the first cotton cloth layers, a pair of the second cotton cloth layers and a pair of the PVC thin film layers are symmetrically arranged, the PVC thin film layers are transparent PVC thin films, and nanometer titanium dioxide is added into the first cotton clothlayers and the second cotton cloth layers. The transparent PVC film layers are compounded on the surfaces of the cotton cloth layers through hot pressing, so a certain waterproof effect is obtained;meanwhile, holes are formed in the PVC thin film layers, so ventilation is facilitated; the transparent PVC thin film layers do not affect light incidence, so the nanometer titanium dioxide adhering to the surfaces of fibers can undergo a reaction, a certain self-cleaning effect is achieved, and an antibacterial effect is achieved; and the yarn density of the second cotton cloth layers is relatively small, so air permeability is relatively good, and yarn guide wires can be woven conveniently.

The invention discloses an LED chip and a manufacturing method of the LED chip. The LED chip comprises a substrate, a buffer layer, an N-type layer, a quantum well, an electronic barrier layer, a P-type layer, a passivation layer, a P electrode and an N electrode, wherein the buffer layer is formed on the substrate, the N-type layer is formed on the buffer layer, the quantum well is formed on the N-type layer, the electronic barrier layer is formed on the quantum well, the P-type layer is formed on the electronic barrier layer, the passivation layer is formed on the P-type layer, the P electrode penetrates from the lower surface of the substrate to the lower surface of the P-type layer, and the N electrode penetrates from the lower surface of the substrate to the lower surface of the N-type layer. The LED chip has the advantages of being high in light out-coupling efficiency, good in heat dissipation performance and low in manufacturing cost.

The invention provides portable electrostatic spinning equipment. The portable electrostatic spinning equipment comprises a syringe, a push rod, a plugging component and a one-way throttling component, wherein the push rod is of a hollow structure, and the one-way throttling component is installed at a second front end of the push rod in a sealed mode. When spinning solution in a first cavity is used up, the push rod is pulled outwards to increase the volume of the first cavity, the plugging component is taken down from the push rod, the spinning solution is injected into a push rod hollow cavity through an opening in a second rear end of the push rod, the medium pressure in the hollow cavity is increased, the one-way throttling part is opened, and the spinning solution enters the first cavity from the push rod hollow cavity, so that injection or replacement of the spinning solution is achieved, and operation is easy and convenient; Besides, medicine powder such as anti-inflammatory medicine can be added into the push rod conveniently, the medicine powder is brought into the first inner cavity when the spinning solution is injected, and spun fibers with the medicine powder are deposited on a wound to facilitate inflammation diminishing and healing of the wound; the electrostatic spinning equipment is small in size and convenient to carry; and when in use, the spinning equipmentcan be conveniently moved along with the wound shape of a patient, the spun fibers are formed according to the shape of the wound, and thus wound healing is realized.

The invention provides a portable electrospinning device, which includes an injection cylinder, a push rod, a blocking component and a one-way throttling component. Wherein, the push rod is a hollow structure, and the second front end of the push rod is sealed with a one-way throttling component. When the spinning solution in the first cavity is used up, pull the push rod outward to increase the volume of the first cavity, remove the plugging part from the push rod, and open the second rear end of the push rod into the hollow cavity of the push rod When the spinning solution is injected, the pressure of the medium in the hollow cavity increases, the one-way throttling part opens, and the spinning solution enters the first cavity from the hollow cavity of the push rod, so that the injection or replacement of the spinning solution is easy to operate; in addition, it is convenient Add medicine powder such as anti-inflammatory drugs to the push rod, and bring the medicine powder into the first inner cavity when the spinning solution is injected, and the spinning with medicine powder is deposited on the wound to facilitate wound healing; the electrospinning equipment is small in size and easy to carry; use It is convenient to move the spinning equipment along with the shape of the patient's wound, and spin according to the shape of the wound to achieve wound healing.

The invention belongs to the field of lighting devices, and particularly relates to a flashlight filter lens. The flashlight filter lens comprises a filter lens shell, an O-shaped ring, a filter lenssheet and a lens sheet pressing ring, wherein the filter lens shell is shaped like a cylinder matched with a flashlight head cover, an annular boss is arranged on the inner wall of the filter lens shell in the circumferential direction, and an annular groove is formed in the end face of the annular boss in the circumferential direction; the O-shaped ring is installed in the annular groove, the filter lens sheet is located in the filter lens shell, and the rim of one side of the filter lens sheet makes contact with the O-shaped ring; and the lens sheet pressing ring is located in the filter lens shell, the lens sheet pressing ring and the inner wall of the filter lens shell are fixed in a threaded connection or interference fit manner, and the lens sheet pressing ring makes contact with therim of the other side of the lens sheet to be used for pressing the filter lens sheet. The problems that an existing filter lens is too large in appearance size, inconvenient to carry and easy to lose are solved.

The invention discloses an anti-splashing cast iron production and pouring device and an implementation method thereof, and belongs to the technical field of cast iron production and pouring. The anti-splashing cast iron production and pouring device comprises a pouring cylinder piece, a pouring opening is formed in the front end of the upper side of the pouring cylinder piece, a movable cover assembly is arranged above the pouring opening, a butt joint assembly is arranged at the lower end of the pouring opening in a butt joint mode, and a flow guide pouring assembly is mounted on the pouring cylinder piece at the lower end of the pouring opening. According to the anti-splashing cast iron production and pouring device and the implementation method thereof, sealing is effectively carried out according to requirements, the use safety is effectively improved, the safety during transportation is guaranteed, the pouring height between molten iron and a pouring groove is reduced, splashing caused by falling of the molten iron from a high position is avoided, the molten iron conveying efficiency is improved, angle adjustment is effectively carried out according to requirements, the pouring convenience is improved, the pouring efficiency is improved, the pouring butt joint accuracy is met, the safety of pouring operators is effectively protected, and the problem of molten iron splashing is solved.

The invention provides a local medicine delivery sustained-release preparation for treating periodontosis, and relates to a local medicine delivery sustained-release for periodontosis, and the preparation is used for solving the problem that a sustained-release preparation is poor in adhesive force. The sustained-release preparation is prepared from the following components in parts by weight: 1-5 parts of antibiotics, 50-200 parts of organic solvent, and 50-200 parts of alpha-cyanoacrylate; or prepared from 1-5 parts of antibiotics, 50-200 parts of a frame component, 50-200 parts of organic solvent, and 50-200 parts of alpha-cyanoacrylate. The sustained-release preparation can be firmly adhered in a periodontal pocket, cannot fall off along with motion of an oral cavity, has an excellent sustained-release effect, can achieve the aim of long-time uniform delivery, is easily applied by patients, and is excellent in curative effect. The local medicine delivery sustained-release preparation is applicable to the field of odontopathy treatment.

The invention discloses an experimental system and a method for simulating a composite load of an explosion shock wave and a single fragment. The method comprises steps of: determining parameters, such as the density and the length of a foamed aluminum projectile, the diameter and the depth of an opening, the length and the diameter of a fragment simulated projectile, and the launch speed of a composite projectile, according to the composite load parameters of the shock wave and the fragment desired simulated; preparing a composite projectile based on the determined composite projectile parameters; and ejecting the prepared composite projectile out of the primary light gas gun at the determined speed, thereby forming a composite load of the shock wave and the single fragment desired simulated. According to the experimental system and the method for simulating the composite load of the explosion shock wave and the single fragment a method for scientific researchers and engineering designers to simulate the explosive power of an explosive device with a shell is provided. The method can be widely applied to the simulation test of explosive impact loads in the fields of the transportation, the safety protection, the military, and the like; can effectively save the test cost; and has considerable economic benefits.

The invention discloses an injection molding machine internet-of-things collector which comprises a pipe body, a pipe cap is connected to the upper portion of the pipe body, a detection rod is slidably connected to an inner cavity of the pipe body, and the detection rod extends out of the lower end of the inner cavity of the pipe body; a sealing cover is installed at the upper end of an inner cavity of the tube body, a tension spring is connected between the sealing cover and the detection rod, an impact piece is installed in an inner cavity of the tube cap and penetrates through the sealing cover, the tension spring is located on an outer ring of the impact piece, a positive electrode interface and a negative electrode interface are formed in the inner cavity of the tube body, and a square limiting strip opening is formed in the lower portion of the tube body. The square limiting strip opening enables the inner cavity of the pipe body to be connected with the outside and pass through, and pins are transversely installed on the circumferential wall of the detection rod and penetrate through the square limiting strip opening. The inner cavity of the pipe cap is further connected with a motor. The output end of the motor is connected with a cam. A connection element is arranged on the circumference of the detection rod and comprises a rubber layer and a copper plate layer.

The invention discloses a method for improving the reliability of a self organizing neural networks (SONNs) structure device by using an asymmetric layered potential barrier. The method comprises the following steps of: 1, providing a P-type substrate; 2, manufacturing a tunneling silicon nitride layer and a tunneling oxidation layer with equal electrical thickness; 3, manufacturing a memory silicon nitride layer on the surface of the tunneling oxidation layer; 4, manufacturing a blocking oxidation layer on the memory silicon nitride layer; and 5, manufacturing polycrystalline silicon on the blocking oxidation layer. The invention aims to provide the method for improving the reliability of the SONNs structure device by using the asymmetric layered potential barrier. The method is high in charge holding capacity, and a cavity in an erasure state can be prevented from entering an interface state in compiling and erasure cycles, so the durability of the device is improved.

The invention relates to a sand leakage preventing sand injection nozzle for a large-calibre core shooting mould. The sand leakage preventing sand injection nozzle comprises a sand injection nozzle body, a rubber nozzle head and a cross rib. Bosses are arranged on the two sides of the lower end of the sand injection nozzle body, grooves matched with the bosses are formed in the upper end of the rubber nozzle head and used for connecting the sand injection nozzle body with the rubber nozzle head, an inner groove is formed in the inner wall of the lower end of the rubber nozzle head, and the cross rib is embedded into the inner groove. The cross rib comprises two perpendicular cross rib bodies, and each cross rib body comprises an arc section and a chute section. The two arc sections are arranged at the two ends of the chute sections correspondingly and embedded into the inner groove, chutes are formed in the tops of the chute sections, sand can fall into the chutes conveniently and are automatically stacked through gravity, and the sand is prevented from further falling off. The sand injection nozzle is used for sand leakage prevention of the large-calibre core shooting mould and is low in manufacturing cost.

The invention discloses a method for restraining boron impurities expanding in a P-shaped pseudo buried layer. The method includes the following steps: (1) depositing silicon oxide and silicon nitride on the surface of a silicon underlayer, then etching shallow trench separation structures on the P-shaped silicon underlayer with the silicon nitride as a barrier layer, subsequently forming the silicon nitride and a silicon nitride side wall, (2) injecting high concentration boron to form a heavy doping P-shaped pseudo buried layer, (3) annealing and boosting, and simultaneously carrying out mild oxidation, growing layers of the silicon nitride respectively on a P-shaped pseudo buried layer area and a non-heavy doping area, and then (4) infusing a heavy doping N-shaped pseudo buried layer. At the time of annealing and boosting, the mild oxidation is simultaneously carried out. A layer of thick silicon nitride grows on the silicon surface of the P-shaped pseudo buried layer area, and a layer of thin silicon nitride grows on the silicon surface of the non-heavy doping area, and therefore expansion of the boron impurities in the P-shaped pseudo buried layer is restrained, and meanwhile infusion of the subsequent N-shaped pseudo buried layer can not be affected.