1154results about How to "Precise thickness control" patented technology

The invention relates to a noble metal doped particles and metallic oxide film integrated gas sensor and a preparation method thereof. The integrated gas sensor comprises a substrate, a heating electrode, a heat-conductive insulating layer, a detecting electrode and a metallic oxide film, wherein the heating electrode is prepared on the substrate, the heat-conductive insulating layer is arranged between the heating electrode and the detecting electrode, and the metallic oxide film is covered on the detecting electrode; the integrated gas sensor is characterized in that noble metal particles are deposited on the metallic oxide film, and the noble metal particles are monatomically covered on the metallic oxide film, the coverage degree of the noble metal particles is 0.05-10% of the surface area of the metallic oxide film and the particle size is 0.2-0.4nm. The integrated gas sensor can effectively improve the gas sensitivity and the gas stability of the metallic oxide film; the metallic oxide film doped with noble metal particles can achieve the sensitivity improved to 9.46 of the noble metal and metallic oxide film from 1.51 of the pure metallic oxide film when used for testing 200ppm ethyl alcohol gas; furthermorethe gas sensitivity reaction temperature of the metallic oxide film is only 150 DEG C.

The invention provides a hot in-place recycling ultrathin overlaying machine of a bituminous pavement and a construction method thereof. The hot in-place recycling ultrathin overlaying machine of the bituminous pavement comprises an automobile chassis, an integral power device, an electric control system, a diesel tank, a receiving and transporting device, a material transfer hopper, a horizontal transporting device, a heating device, a hydraulic system, a recycling agent spraying system, a harrowing device, a distributing spiral device, a paving screed device, a cab, and an electric control operating floor, wherein the automobile chassis is a special automobile chassis. The hot in-place recycling ultrathin overlaying machine of the bituminous pavement finishes the continuous overlay repair work of the pavement through a series of processes such as receiving the materials, feeding the materials quantitatively, transporting the materials horizontally, spraying the recycling agent, harrowing, heating, distributing and paving the materials, ironing, and grinding and the like, and has the advantage of carrying out one-time maintenance on the defects such as loose, shallow vertical and horizontal cracks, track, slight crack, bituminous aging, pavement seepage and the like of a functional layer of the pavement. By adopting the invention, the antiskid resistance of the pavement is restored, the profile of the pavement is corrected, the appearance and the evenness of the pavement are improved, the pavement strength of the pavement is increased, the traffic noise is reduced, and the service life of the pavement is prolonged.

The invention is applicable to the technical field of touch screen production and provides a method for manufacturing a novel electrode lead capacitive screen, the novel electrode lead capacitive screen and a touch screen terminal. The method comprises the following steps of: (1) preparing an indium tin oxide (ITO) conductive film on a polyester (PET) base film; (2) preparing a copper film on the ITO conductive film by using a magnetically-controlled splutter coating method; (3) manufacturing ITO patterns, and forming an edge copper electrode lead at one time; (4) selectively etching the copper film on the middle ITO pattern, and reserving the ITO pattern to obtain PET thin film structures; and (5) sequentially adhering two PET thin film structures which are obtained in the step (4) and a piece of panel glass by using an optical adhesive to obtain the novel electrode lead capacitive screen. In the method for manufacturing the novel electrode lead capacitive screen provided by the invention, the magnetically-controlled splutter coating method is adopted to replace a silk-screening silver paste process to manufacture an electrode lead of a capacitive screen with mature technical means; and by the method, the good rate for manufacturing the capacitive screen having a film-film structure can be greatly improved, so that the manufacturing cost of the capacitive screen is saved.

The invention belongs to the field of semiconductor parts, and provides an atomic layer deposition preparation method for an aluminum oxide thin film. The method comprises the following steps of (1) loading a silicon substrate in an atomic layer deposition reaction chamber, and vacuumizing the reaction chamber; (2) performing atomic layer deposition by taking TMA (trimethylaluminum) as an aluminum source and taking H2O as an oxygen source; (3) performing atomic layer deposition by taking TMA as the aluminum source and taking O3 as the oxygen source. According to the method, an H2O and O3 combination Al2O3 diatomic layer deposition process is provided for solving the problem of bubbles after the sintering of an Al2O3/SiNx laminated thin film, and compared with an H2O-based Al2O3 thin film, the Al2O3 thin film prepared from reaction sources TMA and O3 is looser, and the accumulation of H2 is effectively avoided; an atomic layer deposition technology is utilized, the thickness of an Al2O3 diatomic layer is accurately controlled, and prepared crystalline silicon with an Al2O3 passive film has high photoelectric conversion efficiency, and is free of hydrogen bubbles.

The invention discloses a fluorine removal agent with a fluorine ion absorption/desorption function through pH value regulation and control. The agent is of a core-shell structure. The agent mainly comprises a silica core and a metal organic framework shell layer which covers a silica surface and is provided with pore paths, wherein silica particles are spherical or irregular in shape, and the particle size is 100-5000 nanometers; and the pore size of the pore paths of the shell layer is between the diameters of a hydrated fluorine ion and a hydrated silicon hexafluoride ion. The invention further discloses a preparation method of the fluorine removal agent. The fluorine removal agent has the fluorine ion absorption/desorption function through pH value regulation and control. The fluorine removal agent can greatly absorb the fluorine ions in the water under the acid condition, and the fluorine ions which are greatly absorbed by the fluorine removal agent can be greatly desorbed under the alkaline condition. The method has the characteristics of accurately controlled thickness, pore path structure and pore size of the metal organic framework shell layer, and is low in preparation equipment investment, simple in technology and easy to operate.

The invention relates to an ablation-resistant protection technology for refractory metal materials and particularly relates to a Zr-based ceramic coating protection method for the surface of a refractory metal material. The method comprises the following steps of firstly, degreasing a refractory metal and grinding with sand paper; secondly, depositing Zr-based ceramic powder on the surface of the refractory metal to form a Zr-based ceramic powder pre-coated layer by virtue of an electrophoretic technology; and finally, cladding the Zr-based ceramic powder pre-coated layer on the surface of the refractory metal to obtain the Zr-based ceramic coating by virtue of a laser cladding technology. According to the method, in order to solve the problem of relatively low application temperature of the silicide protective coating applied in the refractory metal, the Zr-based ceramic coating is adopted to solve the application limitation of the refractory metal so that the ablation resistance of the refractory metal matrix at above 2000 DEG C is effectively increased.

The invention discloses a forming window for high-speed continuous photocuring 3D printing. The forming window applied to a photocuring 3D printer comprises a window box and an oxygen supply cooling module. The photocuring 3D printer is divided into an upper cavity and a lower cavity through a middle partition. The window box and the oxygen supply cooling module are arranged in the upper cavity of the case of the photocuring 3D printer. The window box and the oxygen supply cooling module are fixedly mounted on the middle partition in a combined manner. Two ends of an oxygen supply cooling chamber are respectively connected with a cooling gas inlet pipeline and a cooling gas outlet pipeline, and the oxygen supply cooling chamber, the o cooling gas inlet pipeline and the cooling gas outlet pipeline form the oxygen supply cooling module. The forming window has the advantages that low-cost and efficient continuous printing of large-size optional-shape parts can be achieved, the forming window is wide in applicable materials, the precision and quality of the printed parts are high, the printed parts are good in consistency, and process stability and reliability are achieved. In addition, the forming window is high in industrial application value and applicable to a desktop-level 3D printer and industrial 3D printing.

The invention discloses a preparation method for a resistive random access memory. The resistive random access memory comprises a bottom electrode, a resistance change dielectric layer material and a top electrode which are assembled in sequence. Preparation of the resistance change dielectric layer material includes the following steps that firstly, a first precursor, first inert gas, a second precursor and second inert gas are fed into a reactor in order, and a monolayer metallic oxide film is deposited on the bottom electrode through a cycle of hot atomic layer deposition; secondly, a plasma enhancement process is carried out on the film; finally, the steps are carried out circularly and alternately. In the preparation process of a resistance change dielectric layer, a brand new in-situ plasma enhancement hot atomic layer deposition technology is brought in, so the surface appearance and defects of the metallic oxide film can be adjusted on a large scale; the resistive random access memory obtained through the preparation method can achieve precision control over device resistance switching characteristics to enable the device switch ratio and erase/write voltage to be adjusted, and has excellent resistance change stability.

The present invention relates to a cylindrical pipe with internal hardened layer, its production method and special-purpose equipment. Said cylindrical pipe has small wall thickness and long length, its pipe wall has internal layer and external layer with different hardness, the hardness of its internal layer is greater than that of external layer, and said pipe is applicable for conveying material with high frictional coefficient. Its production method adopts the mode utilizing frequency to control pipe movement and proper hardening temp. range, and is special-purpose equipment is simple in structure, stable in operation, and can accurately control hardening temp., pipe moving speed nad depth of hardened layer.

The invention discloses carbon-Cu6Sn5 alloy negative electrode materials and a preparation method thereof. The carbon-Cu6Sn5 alloy negative electrode materials and the preparation method thereof combine carbon nanometer tubes and graphene into electrodes and add a Cu-CNTs connecting layer between active materials and current collectors. Therefore, cyclic perforce of an alloy negative electrode is improved greatly. The carbon-Cu6Sn5 alloy negative electrode materials and the preparation method thereof use copper foils as the current collectors (electroplating substrates). The copper foils are plated by a Cu-CNTs composite plating and a composite plating of stannum-carbon nanometer tubes or stannum- graphene or stannum-carbon nanometer tubes- graphenes in sequence, wherein the thickness of the Cu-CNTs composite plating is 1-5 micrometers and the thickness of the composite plating of the stannum-carbon nanometer tubes or the stannum- graphene or the stannum-carbon nanometer tubes- graphene is 1-4 micrometers. The carbon-Cu6Sn5 alloy negative electrode materials can be obtained finally through thermal treatments. First specific discharge capacity of lithium ion battery alloy cathodes prepared by the method can achieve 613 m AH /g and specific capacity attenuation of the lithium ion battery alloy cathodes is only 4%-6% after 100 cycles. The carbon-Cu6Sn5 alloy negative electrode materials and the preparation method thereof are simple in technique, good in prepared alloy cathode performance and suitable for large-scale industrial production.