540results about How to "Increased anisotropy" patented technology

The present invention relates to a system for managing the heat from a heat source like an electronic component. More particularly, the present invention relates to a system effective for dissipating the heat generated by an electronic component using a thermal management system that includes a thermal interface formed from a flexible graphite sheet and/or a heat sink formed from a graphite article.

There is provided a method for manufacturing a semiconductor device including processing a substrate to be processed by using an amorphous carbon hard mask that includes processing an amorphous carbon film formed on the substrate to be processed to provide a hard mask, and forming a protective film comprising a silicon oxide film on a sidewall of the amorphous carbon film exposed during or after processing the amorphous carbon film; and the protective film preferably formed by sputtering an intermediate mask comprising at least a silicon oxide on the amorphous carbon film.

The present invention relates generally to medical devices; in particular and without limitation, to unique electrodes and/or electrical lead assemblies for stimulating cardiac tissue, muscle tissue, neurological tissue, brain tissue and/or organ tissue; to electrophysiology mapping and ablation catheters for monitoring and selectively altering physiologic conduction pathways; and, wherein said electrodes, lead assemblies and catheters optionally include fluid irrigation conduit(s) for providing therapeutic and/or performance enhancing materials to adjacent biological tissue, and wherein each said device is coupled to or incorporates nanostructure or materials therein. The present invention also provides methods for fabricating, deploying, and operating such medical devices.

In a gas containing a fluorine atom in the molecule, etching of a SiN film is performed isotropically; therefore, the width of a sidewall gets smaller and it is difficult to widen the width of an LDD region. A silicon nitride film is formed over a gate electrode, a hydrogen bromide is mainly used as an etching gas, the silicon nitride film only over the gate electrode and the surface of a substrate are removed by an etching method such as ICP (Inductively Coupled Plasma), and the silicon nitride film is simultaneously left only on the side surface part of the gate electrode.

The invention discloses an alcohol-free alkaline texturing solution for a mono-crystalline silicon wafer, a texturing method for the mono-crystalline silicon wafer, a solar cell and a manufacturing method for the solar cell. The alcohol-free alkaline texturing solution for the mono-crystalline silicon wafer comprises an alkaline solution and a texturing additive, wherein the texturing additive is an alcohol-free additive. According to the alcohol-free alkaline texturing solution, isopropanol which is harmful to human bodies and the environment adopted in the conventional alkaline texturing solution is abandoned; the corrosion depth of the surface of a silicon wafer can be controlled within the range of 5 to 7.5 mu m easily by performing surface texturing on the mono-crystalline silicon wafer obtained by performing linear cutting on a diamond by only adopting the alcohol-free alkaline texturing solution consisting of the alkaline solution and the alcohol-free additive; meanwhile, the corrosion speed is guaranteed; the anisotropy of corrosion is enhanced; pyramid structures on the surface of the silicon wafer obtained after the texturing are small and uniform in size, so that the reflectivity of the surface of the silicon wafer is reduced by about 1 percent; the light absorption capacity of the surface of the silicon wafer is increased; the conversion efficiency of the solar cell is improved.

There is provided a copper alloy sheet including 1.0 to 3.5 mass % Ni, 0.5 to 2.0 mass % Co, and 0.3 to 1.5 mass % Si, a Co/Ni mass ratio being 0.15 to 1.5, an (Ni+Co)/Si mass ratio being 4 to 7, and a balance being composed of Cu and an unavoidable impurity, wherein in observation results of a crystal grain boundary property and crystal orientation by EBSP measurement, a density of twin boundaries among all crystal grain boundaries is 40% or more and an area ratio of crystal grains with Cube orientation is 20% or more, on a rolled surface.

The invention discloses a morphology and PCA (principal component analysis) based contourlet fusion method for infrared and visible light images. The method includes: firstly, subjecting two images to morphology-hat transformation respectively and subjecting the two obtained images to contourlet decomposition to form a high-frequency image and a low-frequency image respectively; then, fusing the low-frequency image by a PCA method; fusing the high-frequency image by means of average gradient adaptive weighted processing; reconstructing a fused image by means of contourlet reverse transformation. The morphology and PCA based contourlet fusion method for the infrared and visible light images is used for image fusion of the infrared and visible light images, so that the fused image is high in contrast ratio, rich in information and clear in texture detail.

A copper alloy sheet has a chemical composition containing 0.7 to 4.0 wt % of Ni, 0.2 to 1.5 wt % of Si, and the balance being copper and unavoidable impurities, the copper alloy sheet having a crystal orientation which satisfies I{200}/I₀{200}≧1.0, assuming that the intensity of X-ray diffraction on the {200} crystal plane on the surface of the copper alloy sheet is I{200} and that the intensity of X-ray diffraction on the {200} crystal plane of the standard powder of pure copper is I₀{200}, and which satisfies I{200}/I{422}≧15, assuming that the intensity of X-ray diffraction on the {422} crystal plane on the surface of the copper alloy sheet is I{422}.

The invention relates to boron nitride/epoxy resin composite and a preparation method and application thereof. The preparation method includes: 1) dispersing boron nitride nanosheet and a binder in water to form a mixed solution; 2) subjecting the mixed solution to bidirectional freezing, and removing ice crystal by lyophilization to obtain boron nitride aerogel with lamellar oriented structure; 3) filling the lamellar oriented structure of the boron nitride aerogel with cured epoxy resin to obtain the boron nitride/epoxy resin composite. The preparation method is simple to perform, is available to large-scale preparation and is suitable for industrial scaled application.

Anisotropic nanocomposite hydrogel materials are created using a process in which a hydrogel-forming material is crosslinked in the presence of nanoscale cellulose and subsequently thermally cycled under an applied tensile strain. Such materials are capable of exhibiting high mechanical and viscoelastic anisotropy, increased stiffness when subjected to large strain, and are suitable for a broad range of soft tissue replacement applications. In addition controlled release of bioactive agents properties can be designed into medical devices fabricated from such nanocomposite materials.

The invention relates to 4Cr5MoSiV1 hot work die steel, in particular to a preparation method for improving the performance of the 4Cr5MoSiV1 hot work die steel. The preparation method comprises the steps of producing highly-clean steel ingots with the total oxygen content being 12 ppm by adopting electric furnace smelting, vacuum carbon deoxidizing and slag surface diffusing and deoxidization refining, adding the pure rare earth La and Ce on the oxygen control condition and carrying out argon shield pouring; carrying out diffusing and homogenizing annealing on the steel ingots and upsetting and drawing forging on the steel ingots in the three-dimensional directions three times, fast cooling the steel ingots through water and air alternately after forging, carrying out the processes of fast cooling after ultrahigh-temperature austenitizing and spheroidizing annealing before quenching, carrying out tempering with the temperature not lower than 590 DEG C 2-3 times after quenching, and finally obtaining the stable tempered structure of the 4Cr5MoSiV1 hot work die steel. According to the invention, the single notched impact property KV2 of the 4Cr5MoSiV1 hot work die steel is greater than or equal to 25 J, the average notched impact property KV2 is greater than or equal to 30 J, the single non-notched impact energy is greater than or equal to 280 J, the average non-notched impact energy is greater than or equal to 320 J, the ratio of the transverse non-notched impact energy to the longitudinal non-notched impact energy is greater than or equal to 93%, and the isotropy is excellent.

A samarium and cobalt sintered permanent magnet material comprises, in weight percent, 25-27%wt of samarium, 49-51%wt of cobalt, 5-6.5%wt of copper, 3-3.5%wt of zirconium and 15-18%wt of iron. A preparation method includes the steps: smelting; casting an ingot; absorbing hydrogen for the cast ingot; making powder; performing orientation forming and sintering. In the smelting process, the thickness of a casting mould cavity is decreased, cooling water is filled into the wall of the mould cavity, cooling of the cast ingot is accelerated, element composition segregation is decreased, the production process is stabilized, a dendrite crystal is restrained by adding a zirconium element, hydrogen absorbing is performed for the cast ingot in the smelting process, production steps are saved, and energy consumption is reduced. In the subsequent milling process, the cast ingot absorbed hydrogen is crystallized into particles, the particles fracture along crystal boundaries in the milling process of airflow, the integrality of crystal particles is ensured, the anisotropy of the crystal particles is improved, magnetic powder particles are obtained, particle size distribution is concentrated with the range of 3.5-4.5 micrometers, the sintering temperature needed by the magnetic powder particle of each point of a blank is the same in the later sintering process, the sizes of the sintered crystal particles are the same and uniform, and the performances, particularly, such as residual magnetism Br, maximum magnetic energy product (BH) max and critical magnetic field Hk of a sintered permanent magnet are improved.

The invention relates to a preparation method of high-toughness and high-thermal-stability hot work die steel. The preparation method comprises the following steps of optimizing alloy components, andstrictly controlling the production process; and the specific process route is as follows, electric furnace smelting, ladle refining furnace refining, vacuum refining furnace refining, electrode blankcasting, protective atmosphere electroslag furnace remelting, forging, ultrafine treatment and spheroidizing annealing production processes are adopted at the same time. The invention further relatesto the high-toughness and high-thermal-stability hot work die steel prepared through the preparation method. The product has the advantages of uniform annealed microstructure, favorable spheroidizedstructure, fine and uniform grain distribution and uniform quenched and tempered structure, and the fine precipitated phases of the Mo and Cr carbides have the dispersion strengthening action in the use process, thereby enhancing the properties of the material and endowing the material with high toughness and high isotropy. The product can be widely used for manufacturing hot extrusion dies, mandrels, hammer dies of die forging hammers, dies of forging presses and dies for precision forging machines, and particularly can be used as a high-end die-casting die made of aluminum, copper and alloysthereof.

The present invention is related to a ferroelectric storage medium for ultrahigh density data storage device and a method for fabricating the same. A supercell having high anisotropy is formed by controlling crystal structure and symmetry of unit structure (supercell) of artificial lattice by using an ordered alignment of predetermined ions having orientation of (perpendicular) deposition direction. Unit atomic layers of oxides having different polarization characteristic are deposited so that the supercell itself shows electric polarization having only two, upward and downward directions as one block of supercell having single-directional polarization. Oxide artificial lattices can be formed so as to have solely 180 degree domain structure, thus a single electric domain having improved anisotropic characteristic can be formed, thereby allowing capability of ultrahigh density data storage and long term data retention.

The invention relates to an electric arc additive manufacturing method for a flange part. The electric arc additive manufacturing method for the flange part comprises the steps that a base plate, a wire, protective gas and equipment are selected; multi-layer and multi-pass accumulation is completed on the base plate from inside to outside along a spiral path through the electric arc additive manufacturing method, so that a bottom surface and a lower neck of the flange part are manufactured; multi-layer and single-pass accumulation is completed on the lower neck along a circular path, so that an upper neck of the flange part is manufactured, and the temperature, current, overlap rate and advancing speed between the layers and the passes are controlled; and redundant portions of the base plate are cut off, solid solution treatment is conducted, the temperature and the constant-temperature time are controlled, and water cooling is conducted. According to the electric arc additive manufacturing method for the flange part, restrains from complex tools, molds and special tools are avoided, only a small degree of finish machining needs to be conducted on a formed blank, the machining procedure is greatly simplified, the manufacturing cycle of products is shortened, and customized individual production can be achieved; and the nondestructive detection quality of the formed flange part is qualified, metal is pure, the structure, the plasticity and the toughness are optimized, the anisotropy phenomenon is improved, and the performance of the flange part can meet the quality and performance requirements for similar forged pieces.

The invention discloses a high-toughness and low-yield-ratio quenched and tempered steel plate used in a low-temperature environment. The high-toughness and low-yield-ratio quenched and tempered steel plate comprises, by weight, 0.045-0.068% of C, 0.13-0.25% of Si, 1.55-1.74% of Mn, smaller than or equal to 0.020% of P, smaller than or equal to 0.0015% of S, 0.25-0.33% of Cr, 0.14-0.21% of Cu, 0.18-0.25% of Ni, 0.035-0.044% of Nb, 0.033-0.049% of V, 0.010-0.016% of Ti and the balance Fe and inevitable impurities. The invention further discloses a manufacturing method of the high-toughness and low-yield-ratio quenched and tempered steel plate used in the low-temperature environment. A proper number of alloy elements such as Cu, Cr and Ni are added to the steel plate on the basis of a low-C and high-Mn system, and Nb, V and Ti are adopted for microalloying. Due to a pass reduction schedule and an offline heat treatment regime in the hot rolling process are optimized, quenched and tempered type pipeline steel which is high in low-temperature-environment toughness and low in yield ratio and is used for a straight seam welded pipe is finally obtained.

The invention relates to a method for preparing a transparent and insulating graphene composite heat-conducting film. According to the method, the heat-conducting film is prepared through the compositing of nanocellulose, graphene and boron nitride. Through filtration drying of nanocellulose dispersion liquid, a nanocellulose film is obtained, the nanocellulose film is immersed in graphene oxide solution, the obtained film is immersed in the nanocellulose dispersion liquid, and a nanocellulose - graphene oxide composite film is obtained by repeating the two-step operations many times, the composite film is placed in a solution to be restored, and a nanocellulose-graphene film is obtained. Mixed solution of the nanocellulose and boron nitride is prepared through an ultrasonic mixing method. The obtained film is immersed in the mixed solution of the cellulose and boron nitride, and a nanocellulose - graphene - boron nitride heat-conducting film is obtained. The film has superhigh anisotropy and is suitable for horizontal heat dissipation of a modern electronic device. The film is good in transparency. Since an outer layer is a mixed film of boron nitride and cellulose, an electric insulation effect can be achieved, and requirements of special electronic devices are met.

The invention discloses a preparation method, based on a solution method, of a polycrystalline solar cell. The method includes the steps: (1) preparing a black silicon structure of the surface of a silicon oxide through a metal assisted chemical etching (MACE) technology; (2) performing optimized processing for the black silicon structure through a nano-structure rebuilding (NSR) solution so that an uniform reverse pyramid structure is formed; (3) changing the sheet resistance after diffusion and the thickness of a silicon nitride passive film on the nano-structure; and (4) forming a silicon oxide/silicon nitride dual-layer passive structure through liquid phase processing and PECVD. The prepared reverse pyramid anti-reflection structure has a better anti-reflection effect compared with a worm type structure formed by acid texturing, and is easier to passivate compared with a nano-black silicon structure, and is an ideal black silicon anti-reflection structure. The preparation method can prepare a polycrystalline solar cell that is low in reflectivity and high in conversion efficiency. Compared with a conventional cell process, the process of the method is simple, only adopts liquid phase processing, is low in cost, and is suitable for industrialized batch production.