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174results about How to "Reduce process steps" patented technology

Miniature piezoelectric vibration energy collector and manufacturing method thereof

The invention designs a structure of a novel MEMS piezoelectric vibration energy collector and a manufacturing method of the novel MEMS piezoelectric vibration energy collector. According to the structure, the novel MEMS piezoelectric vibration energy collector comprises a dually-polished substrate and double substrate protecting layers. According to the manufacturing method of the novel MEMS piezoelectric vibration energy collector, a front metal conductive layer (the bottom) is used as an output bottom electrode; a patterned conductive adhesive is manufactured on an upper metal layer; a PZT piezoelectric patch is bonded to a silicon wafer bottom electrode through the conductive adhesive; full-piece covering of a top electrode metal conductive layer (the top) is conducted; KOH is corroded through a window in the back-side substrate protecting layer, and a cantilever beam structure which mainly contains epoxy resin and does not contain Si is released; a cantilever beam-quality block structure is released through scribing. The novel MEMS piezoelectric vibration energy collector is simple in structure, easy to obtain, capable of facilitating batch production, high in sensitiveness, output level and power, wide in application range, safe and reliable.
Owner:INST OF MICROELECTRONICS CHINESE ACAD OF SCI

Vacuum freeze drying method and vacuum freeze dryer

The invention provides a vacuum freeze dryer which comprises a material box, a water catching bin, a refrigerating unit, a heater, a vacuum pump and a control device. The material box is communicated with the water catching bin. The water catching bin is connected with the vacuum pump. The refrigerating unit and the heater are arranged outside the material box. The control device controls the refrigerating unit, the heater and the vacuum pump. The material box is internally provided with a refrigerating pipe and a heating pipe at the same time, and the refrigerating pipe and the heating pipe are used for freezing and drying materials respectively. The inner wall of a material frame and the inner wall of the material box are each provided with a temperature sensor, and the temperature sensors monitor the temperature of the material frame and the temperature of the material box. Materials inside a material bottle are frozen in advance to reach the eutectic point approximately, then the temperature is decreased rapidly, and the materials pass through the eutectic point within the short time as little as possible, so that the grain size of crystals is effectively controlled, the fine freeze-drying powder is obtained, and the freeze-dried powder product quality is improved. The freezing cavity and the drying cavity are integrated, the technological steps are simplified, the occupied space is small, and refrigerating and heating are uniform.
Owner:BEIJING HAIHETIAN TECH DEV

LCP (Liquid Crystal Polymer) or fluoride polymer high-frequency high-transmission double-sided copper clad laminate and FPC (Flexible Printed Circuit)

The invention discloses an LCP (Liquid Crystal Polymer) or fluoride polymer high-frequency high-transmission double-sided copper clad laminate which comprises a first copper foil layer, a second copper foil layer, a first very low dielectric glue layer and at least one insulating polymer layer, wherein the first very low dielectric glue layer is positioned between the first and second copper foillayers; the Rz value of the inner surfaces of the first and second copper foil layers is 0.1-1.0 micron; the insulating polymer is at least one of a first LCP polymer layer or a first fluoride polymerlayer; the first very low dielectric glue layer is a glue layer with a Dk value of 2.0-3.5 and a Df value of 0.002-0.010; the first polyimide layer is an insulating polymer layer with a Dk value of 2.20-3.50 and a Df value of 0.002-0.010. The double-sided copper clad laminate and the FPC disclosed by the invention have excellent electrical properties and also have cost advantages, short manufacture procedure processes, low thermal expansion coefficients, stable dk/df performances in high-temperature and humidity environments, ultra-low water absorption rate, excellent UV laser drilling abilities, low rebound, suitableness for high-density assembly and excellent mechanical properties.
Owner:KUSN APLUS TEC CORP

Method for directly producing low-molecular weight heparin sodium through heparin sodium crude product

InactiveCN103214596AImprove securityReduce process stepsChemistryDirect production
The invention relates to a method for directly producing low-molecular weight heparin sodium through a heparin sodium crude product, and the method comprises the following steps of: (1) dissolving the heparin sodium crude product into a heparin sodium crude product solution by using a sodium chloride solution, regulating the pH value of the heparin sodium crude product solution to 5.0-10.0 by using hydrochloric acid or a sodium hydroxide solution, centrifugalizing by using a high-speed centrifuge to remove undissolved substances, depositing liquid obtained through centrifugalization by using ethanol, standing the deposited liquid at low temperature, collecting a sediment A, diluting the sediment A by using purified water, adding hydrogen peroxide for oxidation after the sediment A is completely dissolved, filtering, adding the ethanol for deposition, and standing to obtain a sediment B; and (2) taking out the sediment B as the intermediate of the heparin sodium crude product, adding the purified water for dissolution, stirring, adding sodium nitrite to degrade heparin sodium at the same time, adding sodium borohydride to reduce the heparin sodium, intercepting large molecules by using an ultrafilter after the reduction is finished, adding the ethanol to ultrafiltrate for deposition, dewatering by using the ethanol, and drying to obtain the low-molecular weight heparin sodium.
Owner:山东万邦赛诺康生化制药股份有限公司

Method for high-efficiency production of alpha type hemihydrated gypsum

ActiveCN107746195AImprove processing powerReduce process stepsGypsumCrystal transformation
The invention discloses a method for high-efficiency production of alpha type hemihydrated gypsum; the method comprises the steps: firstly, pretreating a provided crystal transformation agent into a crystal transformation agent powder with the particle size of 80-100 mesh, and then evenly mixing the crystal transformation agent powder with a provided dihydrate gypsum powder with the mass ratio of0.02-0.8%, to obtain a mixture powder; directly loading the mixture powder with the bulk volume of 75-85% of the volume of a crystal transformation device into the crystal modification device; introducing 0.25-0.45 MPa saturated water vapor to the crystal modification device, at the moment, gradually permeating the saturated water vapor into a loose material layer, gradually dissolving the powdercrystal transformation agent, gradually increasing the temperature of the mixture to 135-160 DEG C, carrying out heat and pressure insulation for 4-6 h, completing crystal transformation of the mixture, and forming a mixed-crystal crystal with a short columnar crystal as the main part; and finally, drying the mixed-crystal crystal to obtain the alpha type hemihydrated gypsum. The method for high-efficiency production of the alpha type hemihydrated gypsum can effectively improve the production efficiency when the alpha type hemihydrated gypsum is produced with powdered dihydrate gypsum as the raw material, especially with industrial by-product gypsum as the raw material.
Owner:宁夏博得石膏研究院(有限公司)

Preparation method for thermoplastic phenolic resin-based hollow carbon balls

The invention provides a preparation method for thermoplastic phenolic resin-based hollow carbon balls. The method comprises the following steps of: blending an aqueous solution containing 1-10 wt% dispersing agent at 20-50 DEG C; stirring phenolic resin, a curing agent and the aqueous solution of the dispersing agent in a mass ratio of 100:(3-20): (500-1500) in an autoclave, heating to 110-130 DEG C in the autoclave, insulating for 0.5 to 3 hours, and then cooling, filtering, and drying to obtain hollow phenolic resin balls; and heating the hollow phenolic resin balls to 800-1000 DEG C in a carbonization and activation furnace in the presence of nitrogen used as protective gas, keeping the temperature constant for 0.5-3 hours, activating the hollow phenolic resin balls at a vapour flow speed of 0.1-1.2 m<3> per hour for 100 g of the hollow phenolic resin balls during the constant-temperature section process, and cooling to obtain the hollow carbon balls. The preparation method for thermoplastic phenolic resin-based hollow carbon balls disclosed by the invention has the following advantages: the hollow carbon balls with ball diameter of 0.1-1.5 mm and the sphericity of 95%-99% are obtained; the volume production rate of a reaction kettle is high; and the hollowness degree of the carbon balls is controllable.
Owner:SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI

Chip measuring sorting system and method

The invention provides chip measuring sorting system and method. The system comprises a sorting device, a measuring device and a carrying device, wherein the sorting device and the measuring device are adjacent to each other; a first storing seat is arranged in the measuring device, and while a second sorting seat is arranged in the sorting device; the carrying device is adjacent to a positioning access device; a first carrying platform is arranged on the carrying device, and while a second carrying platform is arranged on the positioning access device to carry and position a standard device; the carrying device is adjacent to the storing device; a picking rotating arm is arranged between the carrying device and the sorting device; the positioning access device is arranged adjacent to a tool frame assembly, and a second mechanical arm is arranged between the positioning access device and the device frame assembly; a standard device and a central control system which is connected with all the devices above are stored in the device frame assembly. With the adoption of the system, the problems of low production efficiency and relatively high production cost due to repeated setting of a cabinet and wafer scanning during measuring and sorting chips in the prior art can be solved.
Owner:EPITOP PHOTOELECTRIC TECH

Boron doped graphene and preparation method thereof

InactiveCN103449408ADoes not affect the conjugated structureReduce process stepsMaterial nanotechnologyGrapheneCvd grapheneP type doping
The invention belongs to the technology field of graphene materials, and discloses a boron doped graphene and a preparation method thereof. The invention adopts a high temperature hot doping method to prepare boron doped graphene. The method comprises following steps: taking graphite as the raw material, and oxidizing the graphite so as to obtain graphite oxide; placing the graphite oxide in a mixed gas atmosphere composed of inert gas and boron source gas, heating to the temperature of 800 to 1100 DEG C, then maintaining the temperature for 0.5 to 2 hours, and cooling the product to the room temperature so as to obtain boron doped graphene. The technology by utilizing the high temperature hot doping method to prepare boron doped graphene has the advantages of few steps, simple operation, and low requirements on equipment, and is benefit for mass industrial production. Graphite oxide is a carbon material with a preferably bad ordering, the material with a lower ordering is more suitable for carrying out boron doping, and the doping process is more homogenous by adopting gas state boron source. The prepared boron doped graphene presents a P-type doping, because the original conjugated structure of graphene is not affected, the boron doped graphene has a more excellent conductive performance than that of graphene.
Owner:OCEANS KING LIGHTING SCI&TECH CO LTD +1

Preparation method of high-efficiency P-type passivation contact crystalline silicon solar cell

The invention relates to the technical field of solar cells, in particular to a preparation method of a high-efficiency P-type passivation contact crystalline silicon solar cell. The preparation method comprises the following steps of: firstly, polishing (or texturing) a P-type monocrystalline silicon wafer serving as a silicon substrate; growing a tunneling silicon oxide film and a doped P-type amorphous silicon film on the back surface of the processed silicon wafer by adopting PECVD (Plasma Enhanced Chemical Vapor Deposition) equipment; depositing a BSG (Boron-Silicon Glass) film on the back surface by adopting the PECVD equipment; performing texturing treatment in KOH solution, and forming a pyramid structure on the front surface of a cell; utilizing a diffusion furnace; growing a passivation layer; and performing screen printing and sintering. According to the preparation method in the invention, a high-temperature crystallization process of amorphous silicon and a standard phosphorus diffusion process are completed in one step in a diffusion tube, so that the process flow is optimized, and the process steps are reduced, thereby greatly improving the productivity, reducing thepollution risk, facilitating reduction of the cost and realization of a high conversion efficiency, and laying a foundation for large-scale application.
Owner:RISEN ENERGY (CHANGZHOU) CO LTD

Co-wound high-voltage and low-voltage coil of transformer and winding method of co-wound high-voltage and low-voltage coil

The invention discloses a co-wound high-voltage and low-voltage coil. The co-wound high-voltage and low-voltage coil comprises an iron core and a high-voltage insulating barrel, wherein the high-voltage insulating barrel is arranged at the outer part of the iron core, a high-voltage coil supporting bar is arranged on an outer surface of the high-voltage insulating barrel, and a high-voltage coil is wound at the outer part of the high-voltage coil supporting bar. The co-wound high-voltage and low-voltage coil is characterized in that the high-voltage coil supporting bar is provided with a protruding end relative to the high-voltage coil, a low-voltage soft paper barrel is arranged at the outer part of the protruding end of the high-voltage coil supporting bar, a low-voltage coil supporting bar is arranged at the outer circumference of the low-voltage soft paper barrel, and a low-voltage coil is wound at the outer part of the low-voltage coil supporting bar. According to the invention, the problems of complex winding process and much tooling equipment of the high-voltage and low-voltage coil in the prior art are solved. The co-wound high-voltage and low-voltage coil has the advantages of simple structure, simple winding process, high production efficiency and low cost.
Owner:NEWONDER SPECIAL ELECTRIC

Forming mold and method for ultra-fine grain hollow magnesium alloy profile

The invention discloses a forming mold and method for an ultra-fine grain hollow magnesium alloy profile. The forming mold comprises a base, a concave die outer sleeve, a concave die inner sleeve, an extruding needle, an extruding shaft and an extruding pad, wherein the concave die inner sleeve is provided with a forming concave die. The forming method the following steps: (1) fixedly connecting the extruding pin and the extruding shaft with an inner sliding block and an outer sliding block of a double-acting extruding machine; (2) heating an ultra-fine grain hollow cylinder blank above a re-crystallization temperature; (3) putting the heated blank into a feeding section of the forming concave die; (4) starting the double-acting extruding machine to position the extruding needle, and pushing the extruding shaft and the extruding pad through the outer sliding block to extrude the blank; and (5) finally forming a tubular product by virtue of the extrusion of the outer sliding block of the extruding machine. According to the forming mold and method, the continuous plasticity of the magnesium alloy tubular product in the machining process can be effectively improved, the mechanical property can be enhanced, and the large-batch production machining can be realized.
Owner:重庆昱华新材料科技有限公司

Secondary mold opening device for micro-pore injection-molding-foaming and in-mold-decoration composite molding and technology

The invention discloses a secondary mold opening device for micro-pore injection-molding-foaming and in-mold-decoration composite molding and a technology. The device comprises a male mold, a female mold, a film for in-mold decoration and a driving mechanism, wherein the male mold and the female mold are oppositely arranged. The film is arranged on the inner wall of the female mold in an attached mode; the driving mechanism is connected with the female mold; before filling, the driving mechanism drives the female mold to move till the size of a mold cavity is smaller than the size of a part; after a mixture melt of a polymer and a foaming agent is injected into the mold cavity and before gas is nucleated, the driving mechanism drives the female mold to be rapidly backed till the size of the mold cavity is coincident with the size of the part; after the part is completely foamed, the driving mechanism drives the female mold to be backed to take out the part. According to the secondary mold opening device, the nucleating efficiency in the foaming process of micro-pore injection-molding-foaming and in-mold-decoration composite molding is effectively improved, the pore foaming form of a product is improved, and the quality of the product is improved.
Owner:WUHAN UNIV OF TECH
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