98results about How to "Good mechanical support" patented technology

The invention relates to a preparation method of high-strength ion-responsive lubricating hydrogel, belonging to the technical field of ion response. The preparation method combines a high-strength hydrogel material with a synergistic design system of ion-responsive supramolecular hydrogel, and realizes the regulation and control of the surface lubrication of the hydrogel material by regulating the bulk phase of the hydrogel material as well as surface ion species and charged state. On the one hand, the high-strength hydrogel can give good mechanical support to cartilage; on the other hand, the ion-responsive supramolecular hydrogel can undergo gel-sol conversion under the action of external ions, and the factors such as ion species and concentration of the environment in which the hydrogel is located can be further controlled according to complexion situations of different ions by an ion-responsive polymer, so that the purpose of reversible regulation of hydrogel surface lubrication is achieved, and the hydrogel is enabled to automatically adjust the strength and the surface lubrication performance. The high-strength ion-responsive lubricating hydrogel greatly enhances the stability and environmental adaptability of bionic cartilage, thus having a very good medical prospect.

The invention relates to a method for enhancing the welding reliability of a high-frequency quad flat no lead (QFN) device. The method comprises the following steps of: (1) uniformly coating a high-temperature solder with the smelting point of between 214 and 220 DEG C on a lining board and welding a printed board on the lining board; (2) coating a low-temperature solder with the smelting point of between 180 and 188 DEG C on a bonding pad of the printed board by using a bushing, sticking the QFN device and welding, wherein the opening size of the bushing is smaller than that of the bonding pad of the printed board; and (3) fastening the lining board in a shell. Through a welding method, secondary heating of the device is avoided, welding stress is reduced and good mechanical support is provided for the printed board assembly on the basis of ensuring that a printed board assembly is fully grounded; simultaneously, thermal stress produced by a component under a cold and heat exchange condition can be greatly reduced and the reliability of the QFN device is enhanced.

The invention discloses a fixing device for fractures of an anterior column, a posterior column and a square area of an acetabulum and a use method thereof. The fixing device comprises a trapezoid main board and a pubic auxiliary board; the integral shape of the trapezoid main board and the pubic auxiliary board is matched with anatomical structures of the insides of the anterior column and the posterior column of the acetabulum and the square area of the acetabulum; an arcus marginalis steel plate positioned at an ilium arcus marginalis is arranged at the upper part of the trapezoid main board; a posterior column steel plate is arranged at one side edge of the trapezoid main board; after being crossed, the posterior column steel plate and the arcus marginalis steel plate are bent and extend towards the fossa iliaca to form a posterior column side wall; an ischium steel plate is arranged at the lower part of the trapezoid main board; a square area baffle is arranged among the arcus marginalis steel plate, the posterior column steel plate and the ischium steel plate; the pubic auxiliary board is matched with an anatomical structure of the inside of the superior pubic ramus, is bent near a pubic tubercle and extends towards the upper surface of the superior pubic ramus to form a pubic side wall; the trapezoid main board and the pubic auxiliary board are provided with a plurality of screw holes. By using the fixing device, the acetabulum fractures can be stably reduced and fixed and quality of fracture reduction and internal fixation is improved.

A solid oxide fuel cell includes an anode layer, an electrolyte layer over a surface of the anode layer, and a cathode layer over a surface of the electrolyte layer. The cathode layer includes a cathode bulk layer, a porous cathode functional layer at an electrolyte, an intermediate cathode layer partitioning the cathode bulk layer and the porous cathode functional layer, the porous intermediate cathode layer having a porosity greater than that of the cathode bulk layer. The solid oxide fuel cells can be combined to form subassemblies that are bonded together to form solid oxide fuel cell assemblies.

Systems and methods for providing mechanically reinforced plated through-holes (PTH) in PCBs, which advantageously allow improved soldering capabilities and reliability, are described herein. Such systems and methods are achieved by reducing the heat sinking effects of PTHs by providing one or more vias surrounding the PTHs to provide an electrical connection between the PTH and the internal and bottom conductive layers of a PCB. In this regard, the PTHs are spaced apart from at least one of the internal conductive layers (e.g., ground or power layers), so the heat sinking effects are reduced. This feature enables molten solder to substantially fill the entire PTH before freezing, thereby improving the mechanical and electrical connection between an electrical component and the PCB. One or more electrically-nonfunctional lands (or “rib reinforcements”) are provided in internal conductive layers to mechanically support the walls of the PCB. These rib reinforcements improve the mechanical strength of the PTHs without affecting the electrical performance and without impacting the ability to solder components to the PCB.

The invention relates to a preparation method of a caprolactone lactate copolymer / collagen / chitosan small-caliber intravascular stent, and the preparation method comprises the following steps of: dissolving a caprolactone lactate copolymer into a solvent to obtain a caprolactone lactate copolymer spinning solution; dissolving collagen into the solvent to obtain a collagen spinning solution; dissolving chitosan into the solvent to obtain a chitosan spinning solution; and carrying out bidirectional electrostatic spinning by taking the caprolactone lactate copolymer spinning solution as a component I and a mixed solution of the collagen spinning solution and the chitosan spinning solution which have the volume ratio of 5-10:1 as a component II to obtain the caprolactone lactate copolymer / collagen / chitosan small-caliber intravascular stent. The biomaterial designed into a multicomponent gradient symmetrical structure has the advantages of better mechanical property and excellent biocompatibility and especially has the advantages of potential on accelerating cell three-dimensional ingrowth and important application in small-caliber vascular tissue engineering.

A radial shaft seal with a sealing element made of a non-woven fabric impregnated with an active material, particularly PTFE. The shaft seal is disposed between a stationary machine part and a rotating shaft. In the axial direction, the sealing element consists of at least one layer of non-woven fabric impregnated with a PTFE dispersion and laminated under pressure and heat.

The invention provides an LED (light-emitting diode) epitaxial wafer which comprises a substrate, a first porous structure layer formed on the top layer of the substrate, a second porous structure layer formed on the first porous structure layer and an LED structure layer formed on the second porous structure layer, wherein the porosity and aperture of the second porous structure layer are smaller than those of the first porous structure layer, and the LED structure layer at least comprises a first-type semiconductor layer, a luminous layer and a second-type semiconductor layer. An LED structure which has the characteristics of large porosity and great thermal mismatch between an epitaxy on porous silicon and a Si (silicon) material is adopted, thereby enabling a weak porous silicon layer to deform partially, releasing thermal mismatch stress, ensuring the integrity of the epitaxial LED structure, forming the large-size epitaxial LED structure, and improving the quality of an epitaxial crystal of the LED structure layer through the second porous structure layer.

The invention relates to a preparation method of a microchannel heat sink for high-heat flux heat dissipation. The method includes the following steps that: a) materials are selected; b) a microchannel is made inside a plate; c) three-dimensional microchannel deformation-free modeling is performed; d ) and a metal frame, a ceramic frame, an outer lead, an IC device, a sensor and a heater are integrated on an active microchannel heat sink, so that system miniaturization can be realized, mechanical support and environmental protection are provided for a chip and an internal circuit, and an input and output function is realized for the chip and the internal circuit. The thermal expansion coefficient of the product is adjustable; and heat generated by devices or a system can be taken away from the heat sink through a high-thermal conductivity medium, the temperature of the surface of the heat sink can be decreased as much as possible and remain constant. The microchannel heat sink has the advantages of small size, large heat dissipation area, good solderability and high stability, and can meet the requirement of high-power density heat dissipation, and can be in sealed connection with other components or parts.

An enhanced ultrasound housing and enhanced ultrasound platform facilitates a technician-friendly layout by providing a beneficial ergonomic layout. Control switches may also be configured to provide convenient implementation of ultrasound techniques. Further, an enhanced ultrasound housing and enhanced ultrasound platform provides physical protection to the device. Physical protection may come in the form of an exoskeletal member, or from a covering which inhibits liquid penetration.

The invention discloses a nanofiltration membrane, a preparation method and application thereof. The nanofiltration membrane comprises a support bottom membrane and an active separation layer arrangedon the support bottom membrane, wherein the active separation layer has an interpenetrating network structure, and the interpenetrating network structure is mainly formed by interpenetrating polyamide formed by an interfacial polycondensation reaction of a polyethyleneimine monomer and an acyl chloride monomer with ultrafine nanofibers. The preparation method comprises the following steps: arranging an ultrafine nano-fiber layer on a micro-filtration membrane to prepare an ultrafine nano-fiber / micro-filtration membrane composite substrate; and carrying out an interfacial polycondensation reaction on a polyethyleneimine monomer and an acyl chloride monomer on the surface of the superfine nanofiber / micro-filtration membrane composite substrate, and carrying out heat treatment to obtain thenano-filtration membrane. The preparation method of the nanofiltration membrane is simple, and the obtained nanofiltration membrane has high flux and high salt rejection performance, so that the desalination energy consumption cost is reduced, and the nanofiltration membrane has a wide application prospect in the aspects of seawater desalination pretreatment, water softening and the like.

A scaffold enwrapped with a polymer film in medical instrument field comprising a scaffold and a polymer film layer having non-biodegradable film material and biodegradable film material plastered closely thereon, wherein the thickness of the polymer film layer is 1 mum to 3000mum. The combination manner of the polymer film and the scaffold includes physical, chemical or mechanical manners for combining the polymer film to the nude scaffold. The scaffold enwrapped with a polymer film can support the tract, eliminate the obstruction and further inhibit the intrusion of tumor tissue, being suitable for patients with malignant tumor in tract and complicated with fistula, the mechanical property of which can reach the index requirement such as the extension strength, tearing strength and extensional deformation, its has favorable mechanical support property, capable of inhibiting tumor inward growth and treating fistula.

A rechargeable flashlight uses induction for charging, and thus does not utilize external contacts. The flashlight is cylindrically shaped, and has a secondary coil wrapped around a portion of the cylindrical body. The flashlight is placed within a ring shaped charger with a primary coil, such that the primary coil is wrapped around the secondary coil. This greatly maximizes the amount of interfacing area between the two coils, without adversely affecting the reflector design. This allows for the charging of a high powered flashlight, without requiring the flashlight to have a disadvantageously sized or constructed head. Furthermore, the primary coil of the charger can advantageously serve as a mechanical support for the flashlight.

The present invention discloses a heat radiation structure based on a graphene thermal interface layer. The structure comprises: multiple graphene layers, wherein each graphene layer has thickness andthe same length and width; multiple bonding layers, wherein each bonding layer has a thickness and one length and one width being the same as these of the graphene layers, the bonding layers and thegraphene layers alternatingly form a stacked structure, the stacked structure is subjected to spiral turning by taking a width direction as a shaft in a length direction starting from one end of the stacked structure to form a cylindrical spiral coil, the top surface and the bottom surface of the spiral coil are planes formed by spiral turning of two opposite thickness surfaces of the multiple graphene layers and the multiple bonding layers. The efficient heat radiation packaging structure based on the graphene thermal interface layer and the manufacturing method thereof effectively utilize graphene high-surface inner thermal conductivity and achieve efficient heat radiation packaging.

A semiconductor circuit comprising a semiconductor die and a package substrate. In one embodiment, a first plurality of conductive bumps serves as a portion of a conductive path between contacts on the semiconductor die and contacts on the package substrate. A second plurality of conductive bumps serves as a portion of a conductive path between other contacts on the die and contacts on the package substrate. Each of the bumps in the first plurality of conductive bumps is larger than each of the bumps in the second plurality of conductive bumps. In another embodiment, the average size of the first plurality of conductive bumps may be at least 20% larger (or greater) than the average size of the second plurality of bumps.

A connector system includes a first connector assembly that is electrically connected to wiring on a first printed wiring board and a second connector assembly that is electrically connected to wiring on a second printed wiring board. Each connector assembly includes a number of connector modules that are joined together in a predetermined array such as a row. In one of the connector assemblies, the row also includes one or more actuation modules. The actuation module or modules are engaged by an actuator mechanism to force the connector assemblies into mating engagement or to draw them apart.

The invention relates to a shear force-responsive supramolecular bionic articular cartilage material with dynamic lubrication and self-repairing ability and a preparation method thereof, and belongs to the technical fields of bionic self-repairing and lubricating articular cartilage materials and preparation thereof. Inspired by articular cartilage, a covalently crosslinked high-strength hydrogelnetwork, a shear force-responsive supramolecular network and an intrinsic self-repairing structural motif are organically combined to provide an intelligent hydrogel material having a function of bionic articular cartilage activity. The intelligent hydrogel material has good mechanical properties and a shear self-lubricating function; more importantly, through the interaction between a shear force-responsive exudation lubricating layer and a self-repairing motif, the dynamic exudation lubrication mechanism is simulated while realizing the double repair of a three-dimensional network structureand the shear force-responsive self-lubricating function after the material is worn. The design concept can be applied to the preparation of new artificial articular cartilage or self-repairing lubrication devices, and has broad application prospects.

The invention provides a novel dual-layer nerve conduit. The novel dual-layer nerve conduit consists of an electrospin decellularization pig nerve substrate conduit layer, and a PLCL layer arranged onthe outer layer of the electrospin decellularization pig nerve substrate conduit layer. Besides, the invention provides a preparation method of the novel dual-layer nerve conduit. The preparation method comprises the following steps of (1) pretreating pig nerves; (2) performing decellularization on the pretreated pig nerves; (3) performing crushing and drying treatment on nerves after being subjected to decellularization; (4) performing electrostatic spinning on the dual-layer nerve conduit layer; and (5) performing post-treatment on the dual-layer nerve conduit layer. The novel dual-layer nerve conduit prepared by the method disclosed by the invention has good biocompatibility and favorable machinery support; an inner-layer decellularization matrix contains various kinds of functional proteins, including collagen, proteoglycan, glycosaminoglycans and nerve growth factors, proliferation, migration and axon growth of schwann cells can be promoted, and the outer-layer PLCL can also effectively prevent hyperplasia of fibrous connective tissue and invasion of surrounding tissue.

An incandescent halogen lamp used in connection with a vehicle headlamp system in which stray light attributable to reflection off of internal lamp components is reduced while the structural integrity of the lamp is maintained. The halogen lamp includes two filaments, several lead wires, and a support bridge all sealed within a glass envelope. Each filament is connected at its outermost end to a flattened end portion of a lead wire which extends along the length of the filament from near the support bridge to the upper end of the filament. The flattened outer ends of the lead wires have a narrow profile that is in alignment with the direction of illumination of light from their respective filaments. This arrangement reduces the surface area that could otherwise interfere with light emitted by the filaments, and thereby reduces the overall stray light produced by the lamp. The flattened outer ends can have a roughened surface to further help reduce the amount of light reflected off the lead wires.

The invention relates to a membrane for guided bone tissue regeneration. The membrane is made of pure zinc or zinc alloy. The mechanical property and degradation property of the zinc-based alloy barrier membrane are superior to that of traditional GTR / GBR membrane, and the zinc-based alloy barrier membrane can avoid the disappearance of the barrier effect caused by the membrane collapse in the bone defect area. Both the performance and price of the zinc-based alloy barrier membrane are superior to that of the GTR / GBR membrane in present clinical use, and the zinc-based alloy barrier membranehas no immunogenicity, can maintain good mechanical support after being implanted for a period of time, and has degradability at the same time. The released zinc ions can promote bone regeneration, and improve the quality and the speed of bone regeneration. The zinc-based alloy barrier membrane prepared by the invention has good cell compatibility and tissue compatibility.

The invention provides a semiconductor structure which comprises a first semiconductor material substrate, a first porous structure layer formed on the top layer of the first semiconductor material substrate, a second porous structure layer formed on the first porous structure layer, a graphical structure layer formed on the second porous structure layer and a second semiconductor material layer formed on the graphical structure layer, wherein the porosity and aperture of the second porous structure layer are both less than the porosity and aperture of the first porous structure layer. The thermal mismatch stress of Si material and epitaxial material can be released through the porous structure layer, the problems of cracking of an epitaxial film under relatively large thickness and the like are prevented, and the quality of the epitaxial film crystal is improved. According to the invention, a large-thickness epitaxial material layer (such as GaN and the like) in relatively large thermal mismatch stress with the Si material can be extended on the Si substrate, and the porous Si material can be removed in subsequent processes, thereby avoiding influence on the subsequent device processes.