68results about How to "Good coarsening effect" patented technology

The present invention provides an aluminum alloy sheet for a lithographic printing plate which allows pits to be uniformly formed by electrochemical roughening, and excels in strength and heat softening resistance. The aluminum alloy sheet for a lithographic printing plate includes 0.1-0.3% of Mg, more than 0.05%, but 0.5% or less of Zn, 0.2-0.6% of Fe, 0.03-0.15% of Si, 0.02% or less of Cu, and 0.003-0.05% of Ti, the remainder being Al and impurities. The aluminum alloy sheet may include more than 0.05%, but 0.3% or less of Mn.

The invention discloses a manufacturing method for a gallium nitride based LED with a vertical structure. During the manufacture of the gallium nitride based LED with the vertical structure, an n-typeGaN-based material is adopted as a polar contact extension layer which is in nitrogen polarity, and after a temporary growth substrate is removed, the surface of the polar contact extension layer isin gallium polarity; based on the base, an n-type ohm contact electrode, that is n-type ohm contact is formed on the n-type GaN-based material of a gallium polar surface, so the n-type ohm contact with good thermal stability can be obtained and the problem of poor thermal stability of ohm contact on the nitrogen polar surface is avoided; and in the LED with the vertical structure manufactured by the manufacturing process, the n-type ohm contact of which has better thermal stability, the working voltage is not changed along the change of outside temperature, therefore, the illumination efficiency and the reliability of the LED can be maintained.

The invention discloses a method for coarsening a surface of a light-emitting diode (LED) with the aid of metal nanoparticles, belonging to the technical field of manufacture of semiconductor optoelectronic materials and devices. The method comprises the steps: firstly, growing an LED epitaxial wafer on a semiconductor substrate, wherein the LED epitaxial wafer sequentially comprises an N-GaN film, a quantum well layer and a P-GaN layer; then depositing a layer of metal nanoparticles on the surface of the P-GaN layer with the aid of ultraviolet light in the solution of metal salts; placing the LED epitaxial wafer after being deposited with the metal nanoparticles in an etchant solution made from a certain proportion of hydrofluoric acid and oxidant; and performing wet etching with the aid of ultraviolet light. By depositing the metal nanoparticles on the N-GaN film, the electron distribution on the surface of the N-GaN film can be changed, the etching rate is increased, thereby being favorable to forming of a coarsened structure. The method disclosed by the invention is suitable for etching of different semiconductor materials and coarsening of the LED epitaxial wafer; and compared with the prior art, the cost is low, the coarsened area is large, the operation is simple, and an ideal coarsened effect can be obtained.

The invention relates to an LED large-area controllable surface coarsening and etching method based on a laser, belonging to the technical field of an LED. The method utilizes semiconductor material for carrying out strong absorption generating gasification on high-power laser with the wavelength less than the band edge absorption wavelength of the semiconductor material, thus realizing surface coarsening for the semiconductor material on the surface of the LED. A high-speed galvanometer or a precise displacement platform is used for controlling the laser processing area or pattern, and can be used for controlling the laser power and the processing line width and depth of focus level adjustment. The LED large-area controllable surface coarsening and etching method can be applied to surface coarsening and etching of the GaAs-based LED and the GaN-based LED of various structures. The laser takes the wavelength less than the band edge absorption wavelength of the processed semiconductor material as reference. The method has the advantages of wide applicable material, rapid processing speed, large area, low cost, good coarsening effect, low damage for the semiconductor material, high controllability of system processing parameters and the like, can effectively solve the problem of p-GaN layer coarsening, and has great application potential in the production of the high-brightness LED.

The present invention provides an epitaxial structure of an ultraviolet LED with an aluminum nitride film and a growth method of the aluminum nitride film. The growth method of the aluminum nitride film includes the following steps that: 1) a metal layer is grown on a substrate; 2) annealing treatment is performed on the substrate, so that the metal layer can form a metal ball-shaped object layer;3) etching treatment is performed on the substrate, so that a pitted substrate can be formed; 4) when temperature rises to 600 to 1200 DEG C, trimethylaluminum and ammonia gas are introduced into a reaction chamber, so that a buffer growth layer can be to grown; 5) when temperature rises to 1250 to 1450 DEG C, first growth mode/second growth mode alternate cyclic growth is carried out, so that anintermediate-state aluminum nitride layer can be formed; and 6) when temperature drops to 1100 to 1250 DEG C, the trimethylaluminum and ammonia are introduced into the aluminum nitride layer, so thatthird growth mode growth can be performed. The aluminum nitride film obtained by using the method has good crystal quality; and the surface cracks of the aluminum nitride film can be reduced.

The invention discloses a processing method for enhancing lamination bonding force of rigid and flexible boards. The processing method comprises the following steps: A. carrying out brown treatment on a flexible board with a protective film; B. carrying out plasma cleaning treatment on the flexible board with the protective film; and C. carrying out typesetting lamination treatment on a rigid board and the flexible board with the protective film within eight hours. By adopting the processing method, the surface of the flexible board can achieve terrific roughening effect, thus enhancing the lamination bonding force of the flexible board with the rigid board and avoiding stratification of the rigid and flexible boards in the subsequent uncovering process.

The invention provides an automobile label plastic electroplating process which comprises the following steps: 1) oil removal; 2) expansion; 3) roughening; 4) reduction; 5) presoaking ; 6) activation; 7) dispergation; 8) copper replacement; 9) copper plating under an acidic condition; 10) copper-tin alloy plating; 11) chrome plating; 12) drying. The set of brand-new plastic electroplating process is provided through complete improvement of a whole set of conventional plastic electroplating process, the whole process is environment-friendly, non-toxic, and free of chemical plating; the operation is easier, the process stability is improved, the wastewater treatment is simple, the production time is greatly shortened, a hanger needs no replacement in the production process, and the production efficiency is greatly improved.

The invention provides a process for electroplating plastic on an automobile mask. The process comprises the following steps: 1), oil removal; 2), expansion; 3), roughening; 4), reduction; 5), preimpregnation; 6), activation; 7), dispergation ; 8), copper replacement; 9), acid copper plating; 10), copper-tin alloy plating; 11), chrome plating ; 12), drying. The brand-new plastic electroplating process is provided through complete improvement on a whole conventional plastic electroplating process, the whole process is environment-friendly, non-toxic and harmless, chemical plating is not required to be used, the operation is easier, the process stability is improved, the wastewater treatment is simple, the production time is greatly shortened, a hanging tool is not required to be replaced in the production process, and the production efficiency is greatly improved.

The invention provides an electroplating process for a high-abrasion-resistant environment-friendly plastic on a washing machine door ring surface. The electroplating process comprises the following steps: 1) oil removal; 2) expansion; 3) roughening; 4) reduction; 5) presoaking ; 6) activation; 7) dispergation ; 8) copper replacement; 9) copper plating under an acidic condition; 10) copper-tin alloy plating; 11) chrome plating ; 12) drying. The brand-new plastic electroplating process is provided through complete improvement of a conventional plastic electroplating process, the whole process is environment-friendly, non-toxic, and free of use of chemical plating; the operation is easier, the process stability is improved, the wastewater treatment is simple, the production time is greatly shortened, a hanger needs no replacement in the production process, and the production efficiency is greatly improved.

The invention provides a manufacturing method for a GaN-based LED (Light Emitting Diode) chip for coarsening a p-GaN layer nanometer bowl-shaped surface and relates to the technical field of photoelectric device production. The manufacturing method comprises the following steps: firstly, evaporating a mask cesium chloride film layer for etching on the surface of a P-GaN layer of a GaN epitaxial wafer; filling water vapor into an evaporating platform chamber, thereby forming a plurality of cesium chloride nanometer islands; depositing silicon dioxide layers on the cesium chloride nanometer islands; soaking or ultrasonically treating the epitaxial wafer in deionized water, thereby forming a silicon dioxide nanometer bowl layer; taking the silicon dioxide nanometer bowl layer as an etching mask; after ending the etching, completely removing the silicon dioxide nanometer bowl layer remained on the GaN epitaxial wafer; performing ICP (Inductively Coupled Plasma) etching on one side of the GaN epitaxial wafer, thereby forming a platform; and evaporating an ITO (Indium Tin Oxide) film on the upper surface of the GaN epitaxial wafer. Compared with the conventional GaN-LED, the GaN-LED after being subjected to surface coarsening has the advantage that the luminous power is increased by above 35%.

The invention provides an electroplating process for plastic on the surface of an automobile gear rod. The electroplating process comprises the following steps: 1) oil removal; 2) expansion; 3) roughening; 4) reduction; 5) presoaking; 6) activation; 7) dispergation; 8) copper replacement; 9) copper plating under an acidic condition; 10) copper-tin alloy plating; 11) chrome plating; 12) drying. The set of brand-new plastic electroplating process is provided through complete improvement of a whole set of conventional plastic electroplating process, the whole process is environment-friendly, non-toxic, and free of chemical plating; the operation is easier, the process stability is improved, the wastewater treatment is simple, the production time is greatly shortened, a hanger needs no replacement in the production process, and the production efficiency is greatly improved.

The invention discloses an environment-friendly method for conducting surface roughening on liquid crystal polymer devices before chemical plating. The environment-friendly method for conducting surface roughening on the liquid crystal polymer devices before chemical plating comprises the following steps: placing liquid crystal polymer (LCP) materials in potassium persulfate roughening liquid, introducing ozone, and conducting roughening treatment under the action of ultrasonic waves; and placing liquid crystal polymers subjected to roughening treatment in an oxidant-removing solution, and then taking out the liquid crystal polymers for cleaning to obtain roughened surfaces. According to the environment-friendly method for conducting surface roughening on the liquid crystal polymer devices before chemical plating, by using low-concentration potassium persulfate as the roughening liquid in combination with ring opening and oxidizing by the ozone and the cavitation and crushing action of the ultrasonic waves, the surfaces of the compound materials are subjected to roughening treatment, adopted technology methods and an adopted formula are environmentally friendly, no flammable, combustible or carcinogenic solvents are used, no high-temperature high-pressure operation is conducted, conventional equipment of an electroplate factory is adopted, the operation steps are simple, and the environment-friendly method for conducting surface roughening on the liquid crystal polymer devices before chemical plating has a good effect, and is especially suitable for large-scale surface roughening treatment of LCP devices of the fields of electronics, communication and micro-electronic machines.

The invention discloses a method for treating the surfaces of plates, comprising the following steps of: electrolyzing and coarsening the surfaces of copper foil base plates by sequentially adopting high current density and low current density, and then coating resins on the coarsened surfaces of the copper foil base plates so that a dry film for development and exposure can be pressed on the copper foil base plate. After the electrolyzed and coarsened copper foil base plates are sequentially subjected to heat-resistant treatment and oxidation-resistant treatment, the surfaces of the copper foil base plates can be coated with the resins, thereby two copper foil base plates can be laminated.

The invention provides a circuit board roughening agent. The circuit board roughening agent comprises, by mass, 15% to 30% of hydrogen peroxide, 5% to 15% of formic acid, 0.1% to 0.8% of methanol andwater balance. The circuit board roughening agent provided by the invention has the advantages of fast roughening speed, constant copper etch rate, good bite rate, good roughening effect and convenient circuit board automation production. By using the circuit board roughening agent provided by the invention, the roughening speed of metal copper on the surface of a circuit board is constantly controlled at 0.5 to 5 micrometers/minute. The biting speed during the roughening process of metal copper on the surface of the circuit board is constant. The need of the existing circuit board automationproduction line for automatic circuit board roughening is met. The production efficiency is improved. The cost is reduced.

The invention discloses a method for manufacturing a GaP rough surface of a GaAs-based LED wafer, and the method comprises the steps: preparing a wafer epitaxial layer, carrying out the roughening corrosion of a GaP window layer of the epitaxial layer, dissolving photoresist and roughening corrosion liquid together through a surfactant, forming corrosion sol with a roughening corrosion effect, coating the surface of the GaP window layer with the corrosion sol, baking at a constant temperature of 40-60 DEG C, removing a corrosion film layer and a silicon dioxide layer by using solvents such asacetone and the like, and continuously preparing to obtain an independent tube core; the process method designed by the invention is simple and easy to operate, does not need to introduce special equipment, is lower in cost, is more uniform in coarsening corrosion of the surface of the epitaxial layer, is higher in corrosion controllability, is good in coarsening effect, and solves the problems that the coarsening corrosion is more difficult to control and the coarsening brightness is not improved greatly when a solution is used at present. When the method provided by the invention is used forcoarsening, the light extraction efficiency can be improved by 25-30 percent, and the method has higher practicability.

The invention provides a neutral metal surface coarsening treatment solution with super-hydrophilicity and super-oleophilicity, and a preparation method and application thereof. The neutral metal surface coarsening treatment solution with super-hydrophilicity and super-oleophilicity comprises the following components according to the total mass of 100%: 2%-10% of chemical components A, 3%-30% of chemical components B and 60%-95% of chemical components C; and the chemical components A comprise mixtures of alkyl siloxane modified nano-silica solutions and catalysts, and the chemical components Acomprise mixtures of fatty acid water alcohol liquid and catalysts. According to the metal surface coarsening treatment solution, through "binary synergy" principles of micro-nano materials, the micro-nano coarsening of the metal surface is achieved, and the super-hydrophilic and super-oleophilic effects of the surface are achieved; and the compatibility of the surface coating materials is higher, and the metal surface adhesion is higher. The coarsening treatment solution provided by the invention is neutral, and is environmentally friendly, safe and recyclable; and zero discharge can be achieved, and the coarsening treatment solution has broad application prospects.

The invention provides an ABS chromium-free coarsening solution. The coarsening solution is an aqueous solution containing manganese sulfate, sulfuric acid, phosphoric acid and methanesulfonic acid. The invention further provides a coarsening method of the chromium-free coarsening solution for ABS plastic. The prepared chromium-free coarsening solution is electrolyzed by an electrolysis device, the ABS plastic is placed in the coarsening solution for chemical coarsening, and the chromium-free coarsening solution needs to be connected with evaporation equipment so as to maintain the specific gravity of the solution. According to the coarsening solution, the environmental pollution caused by conventional chromium acid coarsening and the use of explosive raw materials such as potassium permanganate are avoided, the coarsening method improves the stability of coarsening liquid and coarsening capability, and the ABS chromium-free coarsening solution has good coarsening effect and industrialapplication value.