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56results about How to "Uniform film quality" patented technology

Preparation method of RB-SiC (Reaction Bonded Silicon Carbide) substrate reflector surface modification layer

The invention provides a preparation method of an RB-SiC (Reaction Bonded Silicon Carbide) substrate reflector surface modification layer, and belongs to the technical field of thin film deposition. The method comprises the following steps: I, preparing filming conditions: mounting a Si target on a twin sputtering cathode of a filming machine, performing surface cleaning treatment on the RB-SiC substrate, fixing to a filming machine workpiece clamp, vacuuming the filming machine and roasting the RB-SiC substrate; II, performing surface treatment on the surface of the Si target of the sputtering cathode: introducing Ar gas into the sputtering cathode, and adjusting medium frequency power supply power to perform sputtering pre-treatment on the surface of the Si target; III, preparing the Si modification layer: increasing the medium frequency power supply power and Ar ventilation volume, and depositing the Si modification layer on the RB-SiC substrate by using a medium frequency magnetron sputtering technology. The preparation process is greatly simplified, the compactness of the film layer is high, the film is uniform, the polishing characteristic is obviously improved, and the optical quality of the surface of the polished substrate is greatly improved.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI

Die, manufacturing method of a laser disk, and a laser disk

The die as provided is a die in which an upper block is placed on an upper surface of a lower block with a lower surface of the upper block in contact with the upper surface, wherein the lower block includes a manifold and a slit serving as a path for discharging paint from the manifold to the outside, constituted respectively from between the lower block and the lower surface of the upper block by forming a cavity and a space which communicates with the outside from this cavity along a columnar direction, respectively, from one end face of a columnar body with a trapezoidal shape of cross section to the other end face, a paint supply path which communicates with the manifold is formed from an outer side located between the one end face and the other end face of the lower block, a slit space dimension of the slit between front end portions in a paint discharge direction of the lower block and the upper block in a discharge port serving as an open end to the outside is smallest on the one end face side and increases toward the other end face side, and a slit length which is a dimension along the paint discharge direction of a space forming surface of the lower block constituting the slit is largest on at least one of the one end face side and the other end face side and is smallest in a position between both the end faces.
Owner:PANASONIC CORP

Preparation method of biferroelectric bismuth ferrite/bismuth vanadatephotoelectrochemical film

The invention discloses a preparation method of a biferroelectric bismuth ferrite/bismuth vanadatephotoelectrochemical film. The method comprises the following steps: 1) performing FTO pretreatment; 2) dissolving bismuth nitrate pentahydrate and potassium iodide in water, and adding metal salt ions and nitric acid to adjust the pH value; 3) dissolving p-benzoquinone in ethanol; 4) mixing the two,and performing electrochemical deposition to obtain a film electrode; and 5) dropwise adding dimethyl sulfoxide in which ferrous acetylacetonate and vanadylacetylacetonate are dissolved into the filmelectrode obtained in the step 4), and carrying out high-temperature heat treatment in a tubular furnace to obtain the biferroelectric doped bismuth ferrite/bismuth vanadatefilm. According to the preparation method of the biferroelectric bismuth ferrite/bismuth vanadatephotoelectrochemical film, the preparation method is simple and easy to implement, the requirement for the size and shape of a bottom electrode is low, the film is uniform in quality, large in specific surface area, accurate in stoichiometric ratio, excellent in photocatalytic performance and high in water photolysis efficiency,and doping modification research is easy to carry out.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
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