89results about How to "Reduce heat damage" patented technology

The invention relates to a production process of a high-elasticity heat-resistant polyester yarn, which comprises the following steps: firstly, selecting high-molecular-weight polyethylene glycol terephthalate, adding 1-3% of nano filler and 5-10% of functional copolymer, and drying at 150 DEG C for 4-6 hours to improve the stability and processability of the material; secondly, melt extrusion is conducted at 280-290 DEG C, spinning is conducted through a multi-section temperature control spinning head, and the fiber cooling uniformity is effectively controlled. Then, two times of drafting and a heat setting process are adopted, the orientation degree of a molecular chain is improved in one time of drafting, and low-temperature plasma treatment is combined to optimize the surface activity and the setting effect of the fibers. In the secondary drafting, the fiber deformation is finely adjusted at low temperature, the thermal damage is reduced, the elasticity is improved, and finally, xylanase treatment and ultraviolet curing are combined, so that the softness, the skin-friendly property and the weather resistance of the fiber are remarkably improved.

The invention discloses a high-quality laser welding manufacturing device and a high-quality laser welding manufacturing method, which solve the problems of concentrated energy distribution, small inherent focal depth, insufficient depth-diameter ratio of welding and insufficient welding thickness of the existing ultrafast laser welding technology. The zoom collimation system, the cone mirror, the acousto-optic modulation unit and the long focal depth compression unit are sequentially arranged on a light path where the welding laser is located in the emergent direction of the welding laser. The zoom collimation system is used for changing the spot diameter of the welding laser and collimating the spot diameter; the cone mirror is used for shaping the welding laser subjected to diameter-variable collimation into long-focal-depth laser; the acousto-optic modulation unit divides the long-focal-depth laser into N sub-beams and adjusts the spatial position of each sub-beam, and N is a positive integer greater than or equal to 1; and the long focal depth compression unit is used for adjusting the spot diameter and focal depth length of each sub-beam, so that the focal position and energy of each sub-beam are suitable for laser welding.

The invention relates to the technical field of leaky coaxial cable production, in particular to a leaky coaxial cable production method which comprises the following steps: S1, welding an inner conductor; s2, foaming and extruding to form an insulating layer; s3, seamless welding of the outer conductor; s4, performing laser hole cutting on the outer conductor through laser processing equipment; and S5, sheath processing. According to the leaky coaxial cable production method, after the outer conductor is seamlessly welded into the circular tube, slotted hole cutting is carried out on the outer conductor through laser, the roundness of the outer conductor can be better, meanwhile, the situations of slotted hole deformation, wrinkling and the like can be reduced, and the cable performance is improved.

The invention discloses a method for simultaneously extracting starch and protein and application thereof. The invention belongs to the technical field of corn deep processing. The invention aims to solve the technical problems that the existing method is low in production efficiency and the obtained corn starch and corn protein are poor in processing characteristic and digestion characteristic. The method comprises the following steps: (1) performing vacuum low-temperature alkalization cooking on corn kernels in a calcium hydroxide solution; (2) performing ultrasonic-high static pressure cooperative treatment after cooking, and then soaking; (3) performing coarse grinding on the soaked corn kernels, then performing fine grinding, and performing enzymolysis with compound protease; and (4) finely grinding, filtering, standing, centrifuging, washing with water, precipitating, respectively collecting a lower-layer white part and an upper-layer yellow part, and freeze-drying to respectively obtain the corn starch and the corn protein. The method improves the processing characteristics of starch and the digestion characteristics of protein, and can be applied to development and production of high-quality corn starch or corn protein-based food.

The invention discloses a laser directional induction arc discharge milling processing system and a laser directional induction arc discharge milling processing method. According to the method, laser is used for puncturing air to directionally trigger arc combustion to efficiently remove materials, meanwhile, air jet flow under a large discharge gap is used for effective arc breaking, continuous arcs are prevented from burning a workpiece, and the conductive performance of the workpiece does not need to be considered; the arc plasma motion trail is copied on a workpiece to form a specific complex contour, and therefore the efficient and high-precision machining method for the high-performance material complex part characteristics is achieved.

The invention discloses a plasma tissue dissociation knife, and relates to the technical field of medical instruments. In order to solve the problems that when an existing endoscopic surgery relates to a plurality of instruments, the instruments need to be frequently switched for surgical operation, and the surgical efficiency is reduced, the following technical scheme is provided: the endoscopic surgical instrument comprises a tool bit, a tool bar, a handle and a cable which are connected in sequence; the cutter head comprises a blade telescopic assembly arranged on the head portion, an endoscope guide tube and a cutter head telescopic control mechanism are arranged in the handle, and the cutter head telescopic control mechanism drives a blade in the blade telescopic assembly to stretch out and draw back through a transmission piece. The positive cable extends to the tool bit to be connected with the blade telescopic assembly, the negative steel pipe is connected with the negative cable, and double-frequency emitter cutting is formed at the blade; the suction channel arranged in the cutter bar is used for flushing the surgical field and sucking turbid liquid in the operation. Compared with a traditional cold instrument, cutting efficiency, bleeding amount control, clear surgical field, cutter bar size optimization, cutting flexibility, sealing performance, operation convenience and the like are remarkably improved.

The invention discloses a vehicle-mounted charger shell friction welding device and a welding method thereof, and relates to the technical field of resistance substrate detection.The vehicle-mounted charger shell friction welding device comprises a base, Y-axis displacement mechanisms are fixedly installed on the two sides of the upper end face of the base, and an X-axis displacement mechanism is installed between the two Y-axis displacement mechanisms; an X-axis displacement mechanism is installed on the upper portion of the base, a vertical displacement mechanism is installed below the X-axis displacement mechanism, a friction welding mechanism is arranged at the bottom of the vertical displacement mechanism, a shell clamping mechanism is arranged in the middle of the upper end of the base and comprises guide grooves, clamping plates are installed above the guide grooves correspondingly, and the clamping plates are arranged on the upper portions of the guide grooves correspondingly. And a transmission rod is installed in the guide groove, a threaded transmission pipe is installed outside the transmission rod, a sliding block is installed outside the threaded transmission pipe, and the problems that in a traditional welding mode, the welding speed cannot be increased on the premise that the flatness of the welding position is ensured, and the flexibility of a positioning mechanism is poor are solved.

The invention relates to the technical field of semiconductors, in particular to a low-temperature bonding method of a chip, which comprises the following steps of: preparing an upper chip with a micro bump which comprises a low-temperature material containing Sn; preparing a lower chip with a copper column, and reducing the roughness of the bonding surface of the copper column; and enabling the bonding surfaces of the micro bumps and the copper columns to be opposite, and carrying out bonding in a vacuum environment under the conditions that the temperature is 50-150 DEG C, the pressure is 10-40MPa and the pulse voltage is 2-6V. According to the low-temperature bonding method of the chip, low-temperature bonding can be realized, the bonding stability is improved, thermal damage caused by bonding is reduced, and the problem of warping of substrates of the upper chip and the lower chip after bonding is solved.

The invention relates to a busbar arrangement structure of a motor flat wire winding and an integral forming method of the busbar arrangement structure in the field of motor winding parts. Flat cables of a busbar are fixed according to an installation sequence through an encapsulation inner mold with a flat wire groove and a copper wire bracket; the pouring cavity for wrapping the busbar is formed through the matching of the pouring outer mold and the pouring inner mold, and the busbar and the copper wire bracket are subjected to pouring sealant integrated pouring, so that a flat cable of the busbar is sealed in a pouring sealant colloid after pouring, the protection property of the busbar is enhanced, the overall welding and fixing of a welding machine are facilitated, and the production efficiency is improved. In addition, through a lower inner pouring gate and an upper inner pouring gate which are formed in the core shaft and a lower outer pouring gate and an upper outer pouring gate which are formed in the pouring inner mold, communication between the pouring cavity and the center pouring gate is achieved, one-time pouring of pouring sealant is achieved, and the sealing quality is improved. And the forming uniformity and the pouring efficiency are improved.

The utility model discloses an anti-deformation MOCVD axis heating assembly, which comprises an electrode pin, an omega-shaped heating assembly, a crimping assembly and a fixing assembly, the electrode pin comprises a supporting part, a limiting bulge is integrally formed on the front side wall of the supporting part close to the upper end, the omega-shaped heating assembly is arranged on the supporting part, the crimping assembly is arranged on the omega-shaped heating assembly, and the fixing assembly is arranged on the omega-shaped heating assembly. The omega-shaped heating assembly comprises a heating sheet, annular mounting parts are integrally formed at two ends of the heating sheet, grooves are formed in the heating sheet and the annular mounting parts, the grooves are arranged in a manner of protruding towards the inner side of the heating sheet, and the crimping assembly is arranged on the outer side wall of the annular mounting part. According to the utility model, the groove is arranged in the middle of the heating sheet, the groove plays a role similar to a reinforcing rib, the deformation of the heating sheet is reduced, and compared with the original structure, the groove increases a small heat dissipation area, so that under the same condition, the heat dissipation is greater than that of the original structure, the temperature of the heating wire is low, and the high-temperature damage is smaller.

The utility model provides a heat dissipation shell of an LED lamp, and relates to the field of LED lamps. The LED lamp heat dissipation shell comprises a fixing plate, a shell mechanism is arranged on the surface of the fixing plate, the shell mechanism comprises a mounting plate and a connecting plate, a heat dissipation mechanism is arranged in the middle of the connecting plate, the heat dissipation mechanism comprises heat dissipation fan blades, a heat dissipation plate and a filter plate, and a sweeping mechanism is arranged on the surface of a fixing bin. The cleaning mechanism comprises a rotating shaft and bristles. According to the heat dissipation shell of the LED lamp, the lamp is installed on a wall through the installation plate, air inside the fixing bin and air outside the fixing bin are made to flow through the heat dissipation fan blades, the heat dissipation efficiency of the LED lamp is improved, circulating air is filtered through the filter plate, the LED lamp is subjected to heat dissipation and cooling through the heat dissipation plate and heat dissipation fins, the heat dissipation efficiency of the LED lamp is improved, and the heat dissipation efficiency of the LED lamp is improved. Bristles are driven to rotate through a rotating shaft to clean the filter plate, so that the filter plate is prevented from being blocked by dust, and the air filtering effect of the filter plate is improved.

The utility model relates to connector technical field especially relates to a micro floating type board -to-board connector structure, including the socket, the socket with the plug adopts vertically and perpendicularly and inserts the mode connection, realizes electric connection and mechanical cooperation, the socket's slot inside evenly interval setting has the contact terminal of elastic sheet along the length direction. Through the quick release mechanism that adopts the mounting seat and, the clamping block and the spring are composed, the socket can realize automatic locking with the mounting seat through the vertical insertion mode, in the insertion process, the circular clamping block is contracted under pressure, when aligning with the clamping hole on the socket, automatically pops out and clamps into the hole under the spring elastic force, completes the fixation, when replacing, can pull out only by exerting axial tension, need not to dismantle the welding or uses screwdriver etc.

The invention belongs to the technical field of vehicle heat dissipation, and particularly relates to a method and system for reducing vehicle heat damage. Comprising a first air duct and a second air duct which are additionally arranged at a front air inlet grille of a vehicle and respectively lead to an engine compartment heat damage part and a power battery; additional grating openings are additionally formed in the positions of a vehicle fog lamp and a vehicle wheel cover; the heat dissipation effect of the engine compartment heat damage part and the power battery is judged according to data returned by the temperature sensor; if the temperature of the engine compartment heat damage part and the temperature of the power battery continuously exceed the set threshold value, the vehicle is prompted to have the heat damage risk through a vehicle large screen, and when the vehicle enters the idling power generation mode, the engine compartment cover is prompted to be opened through the vehicle large screen, so that effective cooling is achieved. The vehicle engine compartment heat damage part and the power battery are subjected to targeted cooling, the heat convection effect is enhanced, and when the cooling effect of the heat convection mode is poor, a user can be prompted to open the engine cover for timely cooling.

The present invention belongs to the technical field of sewage treatment, and in particular, relates to a heat exchanger device for a subcritical water oxidation process. The present invention has the technical effect of heat exchange between cold and hot wastewater and timely discharge of the superheated gas generated in the heat exchange process to reduce the thermal damage of the heat exchange tube through a heat exchange box unit, a venting pipe unit arranged on the heat exchange box unit and used to release the superheated gas to the outside, and a baffle unit arranged in the venting pipe unit and used to switch the venting channel. The present invention has a simple structure and is easy to install. The heat of the superheated treated wastewater is transferred to the wastewater to be heated through heat exchange to recover energy. An eccentric head pipe is arranged so that the superheated gas accumulated in the upper part of the heat exchange box can dissipate the heat energy in time, and the superheated gas is discharged in time through the venting pipe unit arranged at the pipe mouth, and the release of the superheated gas can be controlled by pushing a turntable and the release direction can be controlled by rotation.

This invention discloses a double-helix composite blade long-diameter-maintaining coring drill bit and its manufacturing method, belonging to the field of geological drilling coring equipment. The drill bit includes a drill bit steel body, double-helix composite blades, and a coring inner cylinder. The double-helix composite blades are arranged in a double-helix staggered distribution, including polycrystalline diamond cutting blades and surface-impregnated diamond grinding blades. The polycrystalline diamond cutting blades have a three-dimensional helical forward-inclined structure, embedded with frustum-shaped polycrystalline diamond sheets and triangular polycrystalline diamonds. The surface-impregnated diamond grinding blades have an axial helical structure, equipped with low-temperature surface-impregnated matrix blocks and surface-impregnated large diamond particles. The outer wall surface of the blades is equipped with a helical long-diameter-maintaining structure. The manufacturing method integrates three processes: pressureless impregnation, hot-pressing sintering, and brazing, to prepare the blade matrix base and the surface-impregnated matrix blocks respectively, and then weld them into shape. This invention, through optimized structural design and multi-process synergy, significantly improves the coring efficiency, wear resistance, and structural stability of the drill bit in complex formations, achieving long-term diameter maintenance and high-efficiency drilling.

The invention relates to a high-intensity focused ultrasound-assisted laser lift-off method, and belongs to the technical field of silicon carbide wafer lift-off. The method comprises the following steps: a, forming a modified layer: providing a silicon carbide crystal ingot, positioning a laser focus point F of a pulse laser ray L at a preset depth in the silicon carbide crystal ingot by adopting the pulse laser ray L with the wavelength permeable to the silicon carbide crystal ingot, and forming the modified layer in the silicon carbide crystal ingot by relatively moving the silicon carbide crystal ingot and the laser focus point F; and b, a wafer stripping step: providing a high-intensity focused ultrasound generating device. According to the invention, the fundamental innovation of the stripping mechanism is realized, the stripping efficiency is high, the action position is accurate, and the damage is more controllable; energy is highly concentrated and precisely acted, energy dispersion is avoided, and the stripping precision is improved; process integration is achieved through synchronous machining, the problems of secondary clamping, interface re-healing and the like are avoided, and efficiency and consistency are improved; the thermal damage and the mechanical damage are obviously reduced; by adjusting the focus position, the system can adapt to complex structures and deep modification.

The application provides a superfine diamond ceramic bond tool bit and a preparation method and application thereof, relates to the technical field of grinding tools, and comprises a base material and a functional additive; the base material comprises the following raw materials in parts by mass: 10-30 parts of a ceramic bond, 50-70 parts of diamond abrasive, 1-20 parts of a filler and 1-20 parts of a nano polishing agent; wherein the diamond abrasive is an irregularly shaped diamond aggregate; the functional additive comprises a temporary binder and a dispersing agent, the temporary binder accounts for 1-10% of the total mass of the base material, and the dispersing agent accounts for 1-10% of the total mass of the base material. The superfine diamond is not caused to agglomerate in the mixing process by changing the mixing mode of the diamond and introducing the diamond in the form of an irregularly shaped diamond aggregate, and the surface roughness of a workpiece is greatly improved by adding a spherical nano polishing agent, and the process is simple, controllable and stable.

The invention provides a high-temperature-resistant small optical system packaging structure and packaging method, and relates to the technical field of optical system packaging. According to the packaging method, firstly, high-temperature-resistant ceramic is used for preparing a high-temperature-resistant ceramic packaging structure base, and then small optical systems formed through sequential stacking are bonded to the high-temperature-resistant ceramic packaging structure base; and then, in a water-free and oxygen-free environment, an indium-based sealing welding ring is used, and welding among the high-temperature-resistant ceramic packaging shell, the indium-based sealing welding ring and the high-temperature-resistant ceramic packaging structure base is completed at low temperature. The thermal damage of low-temperature welding to devices in a small optical system is small, the residual thermal stress is small, the air tightness of a physical system is good, and the obtained packaging structure can keep high stability and air tightness in a high-temperature environment. The packaging structure base and the packaging shell of the packaging structure are both made of high-temperature-resistant ceramic, the overall thermal expansion of the packaging structure is consistent, and damage caused by inconsistent stress when the packaging structure works in a high-temperature environment is avoided.

The utility model relates to a kind of electric protection devices of refining furnace door, including refining furnace and furnace door, furnace door is vertical hinged door, further including detection mechanism and the electric push rod of driving furnace door switch, the detection mechanism includes the mounting plate of being fixedly connected in the outside of furnace door, the top rod of being slidably connected on mounting plate along furnace door switch direction and the trigger rod of being horizontally slidably connected on mounting plate, one end of the trigger rod is drivingly connected with top rod, and the other end of trigger rod is equipped with the microswitch of being fixedly connected on mounting plate, the utility model drives furnace door switch by electric push rod, realizes the automation of furnace door operation, specially equipped with detection mechanism, can feedback closed state when furnace door is closed, greatly improve state visibility and operation safety, system is also integrated cooling waterway structure, the working temperature of furnace door and electric actuator is effectively reduced by circulating cooling water in internal water tank and transition water tank, significantly reduce the thermal damage of high temperature to electric push rod and microswitch, prolong service life.

The utility model discloses a bottom discharging mechanism of a vertical kiln. The bottom discharging mechanism comprises a vertical kiln main body, the first electromagnet, the second electromagnet and the third electromagnet are adopted, during operation, the moving box can be correspondingly moved through repulsive force generated by operation of the first electromagnet at different positions, and then the blocking head can be inserted into the discharging opening through repulsive force generated by the third electromagnet to achieve blocking operation. In the subsequent discharging process, a movable rod at the bottom of a material blocking head can be attracted and fixed through attraction force generated by a second electromagnet, then a discharging opening is opened, in the whole operation process, operation between structures is achieved through attraction force and mutual exclusion force of multiple sets of electromagnets, heat contact transfer between all components is avoided, and the working efficiency is improved. The heat dissipation device can improve the use safety of corresponding equipment, reduces the problem of high-temperature damage of the equipment caused by heat transfer, improves the overall use effect, and has the advantages of blocking heat conduction and preventing heat loss of the equipment.

The invention discloses a low-temperature curing high-resolution polyimide photoresist and a patterning method and application thereof, and belongs to the technical field of photoresist, and the patterning method comprises the following steps: (1) under the protection of inert gas, adding an aromatic dianhydride monomer into a diamine monomer solution, and stirring for reaction to obtain a polyamide acid solution; the diamine monomer comprises a diamine monomer with high reaction activity and a diamine monomer with low reaction activity; and (2) adding a photosensitizer and a chemical imidization catalyst into the polyamide acid solution, uniformly mixing, coating a base material with the mixture, removing the solvent, and performing ultraviolet curing development and gradient heating heat treatment to complete an imidization reaction, so that the photoresist is cured, and the high-resolution polyimide pattern is obtained. Through molecular design and process innovation, the photoresist provided by the invention has the advantages of low-temperature curing, high resolution, excellent thermal stability and low dielectric property, the polyimide photoresist can be prepared through low-temperature curing, and meanwhile, the requirements of flexible electronics and high-density packaging are met.

The invention discloses a stem cell-based microvesicle as well as a preparation method and application thereof, belongs to the technical field of biological tissue engineering, and particularly relates to a preparation method of the stem cell-based microvesicle, which comprises the following steps: culturing stem cells until the cell fusion degree is 80-90%, performing hypoxia treatment, and cleaning for 2-3 times; standing and culturing the cleaned stem cells, then adding a calcium ion carrier, and carrying out ultrasonic treatment; the serum-free basic culture medium containing the calcium ion carrier is immediately absorbed and removed, the cells are cleaned through PBS, culture is conducted for 24 h, and cell supernatant is collected and merged respectively; performing first centrifugation to remove cell debris; performing second centrifugation to remove dead cells and large cell debris; carrying out third centrifugation to remove organelles; fourth centrifugation is carried out, large vesicles are removed, and a final supernatant is obtained; and filtering and centrifuging to obtain a microvesicle precipitate. The preparation method of the microvesicles aims at systematically improving the yield and biological activity of the stem cell microvesicles through low-oxygen pre-stimulation, ultrasonic-calcium ion carrier synergistic induction and differential centrifugation.

The utility model discloses a shear mode radio frequency electrocoagulation instrument with a special coating, which comprises a handle, the handle comprises a handle upper shell and a handle lower shell, the shear mode radio frequency electrocoagulation instrument also comprises a forceps head, a cutter bar fixing seat and a cutter bar, the forceps head is connected with the cutter bar fixing seat, and the middle part of the cutter bar penetrates into the cutter bar fixing seat after penetrating through a silicon rubber case and is connected with the cutter bar fixing seat; a lantern spring is inserted into the tail portion of the screwdriver rod, a five-core socket assembly is inserted into the lantern spring, and a plug part of the five-core socket assembly is sleeved with the handle tailstock. The cutter bar fixing seat is inserted into the handle so as to fix the cutter bar on the handle; the handle lower shell is provided with a handle lower shell clamping groove b, a silica gel sheet, a flexible circuit board and a large and small gear switch button are sequentially placed in the handle lower shell clamping groove b, the large and small gear switch button is in contact with the flexible circuit board, and the cutter bar is connected with the flexible circuit board. The large and small gear switch button arranged on the upper portion of the handle is used for adjusting radio frequency intensity, and operation time is saved.

The application discloses a laser heating and grinding method for a semiconductor, which comprises the following steps: heating and treating a semiconductor surface by using a laser; and grinding the semiconductor surface after the laser heating. The technical scheme can effectively reduce thermal damage and defects generated in the process of grinding the semiconductor surface, thereby improving the surface quality and optical performance of the semiconductor.

This invention discloses a multi-dimensional blending method for heating lubricating oil. The method first initializes data such as the viscosity-temperature characteristic curve of the base oil, the dissolution activation energy of additives, and the thermal degradation threshold. Then, it constructs a multi-dimensional coupled model encompassing temperature, rheology, and time dimensions. The main heating unit maintains the base oil's basic flow temperature and performs low-speed pre-blending. During additive injection, an auxiliary heating unit rapidly heats the local fluid at the instantaneous optimal dissolution temperature calculated by the model. Apparent viscosity is calculated based on mixing torque feedback. Shear rate and heating power are dynamically adjusted according to the blending efficiency function. The blending endpoint is determined using a "viscosity-energy consumption" feedback loop, and parameters are optimized through an adaptive learning module. This method achieves efficient dispersion, energy saving, low thermal damage, and improves product mixing uniformity and batch quality stability.

This invention provides an aqueous dewaxing reagent comprising the following components by weight percentage: 0.3-6% surfactant and 0.5-3% composite penetration enhancer, with the balance being water. The composite penetration enhancer is composed of limonene and terpineol, wherein the mass of terpineol is not less than 10% of the total mass of the composite penetration enhancer. The preparation method involves mixing the surfactant, composite penetration enhancer, and water. This invention utilizes a composite penetration enhancer composed of limonene and terpineol, which significantly improves dewaxing speed, reduces temperature dependence, widens the operating temperature window, reduces tissue damage, provides better protection against antigens, and is beneficial for IHC staining.

The invention provides a cartilage irreversible electroporation ablation model optimization method, and relates to the technical field of data processing, and the method comprises the steps: constructing a cartilage irreversible electroporation ablation model; an ablation sample data set is obtained, the ablation sample data set comprises a plurality of ablation samples, and the ablation samples comprise patient data and ablation parameters; an ablation target function of the cartilage irreversible electroporation ablation model is constructed with the purposes of increasing the effective ablation volume, improving the ablation uniformity and reducing thermal damage; by means of the ablation sample data set, optimal model parameters are determined with the purpose of maximizing the ablation objective function, and the cartilage irreversible electroporation ablation model is optimized; acquiring patient data of a target patient, and inputting the patient data into the trained and optimized cartilage irreversible electroporation ablation model; and by training the optimized cartilage irreversible electroporation ablation model, determining optimal ablation parameters for the target patient.

The invention relates to a composite substrate structure, an epitaxial structure and a preparation method of the composite substrate structure, and the composite substrate structure comprises a patterned substrate which comprises a base layer and a patterned layer, the patterned layer is formed on the upper surface of the base layer, and the patterned layer comprises a plurality of protruding parts; the buffer layer and the undoped semiconductor layer are sequentially laid on the patterned substrate; the thickness of the buffer layer is smaller than the height of the protruding part; the undoped semiconductor layer can completely submerge the buffer layer, the upper surface of the undoped semiconductor layer is provided with a pit matched with the protruding part, and a blocking part is arranged in the pit; the downward projection of the blocking part at least can cover the central area of the protruding part; the blocking part is made of an amorphous material, and the heat conductivity coefficient of the blocking part is lower than that of the undoped semiconductor layer.

The invention provides a titanium alloy material with good biocompatibility and a preparation method thereof, and the preparation method comprises the following steps: S10, obtaining a titanium alloy matrix, and carrying out surface roughening treatment on the titanium alloy matrix; alloy A is obtained; s20, the surface of the alloy A is coated with a porous ceramic material; alloy B is obtained; s30, a composite molecular layer is assembled on the surface of the alloy B; the titanium alloy material is obtained; wherein the composite molecular layer comprises a first biomolecule and a second biomolecule; the first biomolecule is fibronectin; the second biomolecule is an amino acid. According to the titanium alloy material provided by the invention, the biocompatibility of the titanium alloy material can be remarkably improved through the combination of the porous ceramic and the composite molecular layer, so that the titanium alloy material is more suitable for being used as a medical implant.

The utility model provides a single battery, battery pack and electronic device, this single battery includes casing, electrode assembly, lid and current collection member, the casing includes side wall, and the side wall surrounds to have the opening, electrode assembly installs in the casing, the lid blocks the opening, and is welded fixed with the side wall, current collection member sets up between the lid and electrode assembly, and current collection member and the current collection department of electrode assembly electric connection, wherein, at the side of lid away from electrode assembly, the lid includes thinning area, and the side surface of thinning area away from electrode assembly recess forms first recess, and the welding mark is formed by the welding connection of lid, side wall and current collection member, and the welding mark is located in first recess. The utility model can improve the technical problem of the welding quality of prior art because of the big thickness of lid, reduces the safety and the yield of single battery.