23440 results about "Thin membrane" patented technology

The invention provides a flexible palladium film hydrogen sensor and a preparation method thereof, the flexible palladium film hydrogen sensor is sequentially provided with a flexible substrate, a hydrogen sensitive sensing layer and a contact connection layer from bottom to top, and the contact connection layer is connected with a resistance measurement unit; and the hydrogen-sensitive sensing layer is a palladium or palladium alloy film with a conical micro-nano structure. The palladium or palladium alloy thin film with the conical micro-nano structure provides a hydrogen sensor conical surface micro-nano structure with a high specific surface area for the flexible palladium thin film hydrogen sensor, and the process that hydrogen is adsorbed, dissolved and diffused into the palladium or palladium alloy thin film is accelerated, so that the response speed of the sensor is increased; according to the hydrogen sensor, the flexible substrate is adopted, so that the hydrogen sensor can be conveniently arranged in various narrow spaces, and the applicability of the hydrogen sensor in various scenes is improved.

The invention relates to an antistatic PET (Polyethylene Terephthalate) base film for preparing a polaroid release film and a preparation method thereof, the release film base film is prepared by taking an optical-grade PET slice as a main body, adding modified PET with a specific structure and a modified SiO2 filler, and carrying out co-extrusion casting, a unique three-section stretching process and coating with a coating liquid. According to the invention, material modification and process improvement are carried out, specifically, an optical-grade PET slice is taken as a main body material, modified PET and a modified SiO2 filler with a specific structure are added, a film is prepared through co-extrusion casting and a unique three-section stretching process, and then the surface of the film is coated with a layer of antistatic coating liquid, so that the antistatic film is obtained. The finally prepared base film has low alignment angle, low transverse hot shrinkage rate and high surface adhesion, keeps the characteristics of high light transmittance and low haze of an optical-grade polyester film, endows the film with certain antistatic property, and is particularly suitable for being used as a release film of a high-end polaroid.

The invention is suitable for the field of film manufacturing, and provides a PO film tape casting process which comprises the following steps: S1, raw material pretreatment; s2, mixing the materials; s3, melt extrusion; s4, carrying out tape casting; s5, cooling and shaping; s6, thickness detection and adjustment; s7, carrying out post-treatment; and S8, rolling is conducted. According to the invention, the three-stage gradient cooling process significantly reduces the internal stress of the film, improves the dimensional stability, and reduces the warping shrinkage of subsequent processing; the thickness deviation of the thin film is controlled within + / -0.01 mm through an online thickness detection and automatic adjustment system, so that the product precision is improved; the surface tension of the film is stably improved by the corona post-treatment process, and the application scene is widened; through strict raw material pretreatment, the bubble defect of the film is effectively avoided, and the appearance quality of the product is improved; and a combined process of high-speed mixing and double-screw extrusion is adopted, so that uniform dispersion and full plasticization of the materials are ensured, and the problems of crystal points, stripes and the like are reduced.

The invention relates to the field of low-temperature liquefied gas storage equipment, and discloses a low-temperature liquefied gas film storage tank and an installation method thereof.The low-temperature liquefied gas film storage tank comprises an outer tank and a plurality of insulation box structures installed on the outer tank; the insulation box structure comprises a secondary insulation box, a secondary shielding layer, a main plywood and a main shielding layer which are arranged in sequence, and the corrugation position of the main shielding layer corresponds to the corrugation position of a corrugated plate in the secondary shielding layer; a gap is formed between every two adjacent insulation box structures, a secondary layer connecting plate is connected between every two adjacent secondary shielding layers, a main layer connecting plate is connected between every two adjacent main shielding layers, and the secondary layer connecting plates and the main layer connecting plates are located above the gaps. The gap between the adjacent insulation box structures can be effectively processed, and the integrity and the sealing performance of the shielding layer are improved.

The air-pulse generating device comprises a film structure, operating at an ultrasonic operating frequency, and a resonant chamber, formed on a side of the film structure. A resonance is formed within the resonance chamber. Due to the resonant chamber, the APG device has a peak on a frequency response of an acoustic property of the APG device at the ultrasonic operating frequency.

The invention relates to the technical field of aluminum-based thin film preparation, and discloses an aluminum-based thin film uniform deposition system based on magnetron sputtering. The system comprises a substrate state detection module, a magnetic field dynamic regulation and control module, a sputtering power regulation module, a deposition process monitoring module and a central control terminal. The substrate state detection module collects and transmits surface flatness data of the substrate in real time, and the central control terminal carries out visual display. The magnetic field dynamic regulation and control module obtains magnetic field intensity correction through a magnetic field gradient algorithm according to the deviation value of the real-time flatness parameter and the standard parameter and sends the magnetic field intensity correction to the sputtering power regulation module. And the sputtering power adjusting module adjusts the sputtering rate of the target material accordingly. The deposition process monitoring module tracks the adjusting process, evaluates the dynamic response performance, generates a stable or fluctuation signal and sends the stable or fluctuation signal to the central control terminal, and the central control terminal triggers sound-light alarm when receiving the fluctuation signal. The system can improve the deposition uniformity and process stability of the aluminum-based thin film.

The invention relates to the technical field of polyurethane films, in particular to a long-acting, stable, flexible, impact-resistant and resistance-reducing protective film and a preparation process thereof. According to the invention, the raw materials such as polyethylene glycol, a modified fluorosilicone monomer, isophorone diisocyanate, hydroxyethyl acrylate, an acrylic antifouling monomer, dodecafluoroheptyl methacrylate and the like are added to prepare the anti-drag coating. Mixing a polyurethane thermoplastic elastomer, aminopropyl polydimethylsiloxane, an antioxidant and an ultraviolet light absorber, and carrying out melt extrusion and blow molding to form a film, so as to obtain a flexible impact-resistant base film; and uniformly coating the surface of the flexible anti-impact base film with the anti-drag coating, and carrying out ultraviolet curing to obtain a finished product. The finished product prepared by the invention has good impact resistance, and can effectively reduce frictional resistance, so that the finished product has wide application prospects in the technical field of polyurethane films.

The invention discloses a multi-probe on-line real-time film thickness measuring method and a multi-probe on-line real-time film thickness measuring device. In combination with the multi-wavelength analysis capability and multi-channel parallel signal characteristics of the spectrum detection unit, different plane positions are adopted to correspond to different wavelengths or central wavelengths, the transmissivity of each wavelength is obtained, and the thickness of the corresponding position is obtained respectively; the precision and the accuracy of obtaining the thickness by a single wavelength are improved through a multi-mode cooperative signal analysis algorithm, so that the thicknesses of a plurality of different positions of the same thin film are accurately obtained at the same time through one spectrum detection unit, or the thicknesses of a plurality of different thin films are obtained; according to the invention, the problems of large absorption, transparent or non-transparent substrate compatibility, quick response, multi-branch and on-line real-time measurement of the film are successfully solved; the device and the method can be integrated in film growth equipment to carry out rapid and high-precision measurement on the film, so that closed-loop control on film production is realized, the iteration speed is increased, the yield of high-quality film production is greatly increased, and the film production cost is saved.

The invention relates to an antistatic MLCC release film base film and a preparation method thereof. The antistatic MLCC release film base film is prepared by melt blending and biaxial stretching of PET master batch, an antistatic composition and a nano filler, wherein the antistatic composition is prepared by compounding modified PET-PEG and thiophene modified aromatic polyamide; the nano filler is prepared by carrying out melt extrusion on KH550 modified talcum powder and MAH-g-PET (maleic anhydride-grafted polyethylene terephthalate). The antistatic composition disclosed by the invention has the beneficial effects that the antistatic composition is formed by interweaving two polymers, and a stable three-dimensional conductive network is constructed in the PET film, so that the antistatic performance is more efficient, lasting and stable. In addition, through chemically bonded modified talcum powder, the smoothness and low roughness are provided, and meanwhile reinforcing and toughening are achieved; and the single-layer extrusion process can realize ultrathin thin film, the production process is simplified, and the production cost is greatly reduced.

This case relates to a self-healing optical film and its preparation method. The optical film is made by adding a nanoparticle suspension to PET masterbatch as the main material during its melt extrusion process, resulting in a cast sheet. After biaxial stretching, a self-healing coating liquid is coated online, followed by shaping and cooling. The nanoparticle suspension includes nano-titanium oxide, MAH-PET polymer, ATO nanoparticles, and titanate coupling agent. The self-healing coating liquid is produced by core-shell emulsion polymerization, forming a nano-silica hard core and an acrylate functional monomer polymer soft shell. This invention adds the nanoparticle suspension by in-situ feeding in the middle of the extruder, reducing steps, improving dispersion uniformity, and making the film surface smoother. Then, the self-healing coating liquid is applied online after longitudinal stretching and before transverse stretching, forming a film on the film surface, improving the hardness and scratch resistance of the film material, enabling rapid self-healing at room temperature, strong stability, and avoiding the occurrence of rainbow patterns.

The invention belongs to the technical field of thin film capacitors, and particularly relates to a chemical grafting modified polypropylene capacitor film material and a preparation method and application thereof. According to the preparation method of the chemical grafting modified polypropylene capacitor film material, provided by the invention, diethylenetriamine ethyl acrylate with a plurality of specific groups such as amino groups and carboxyl groups and unsaturated double bonds is synthesized through esterification reaction, and the diethylenetriamine ethyl acrylate is introduced into a polypropylene material through chemical grafting to obtain chemical grafting modified polypropylene; the prepared polypropylene capacitor film material has the excellent properties of good compatibility, difficulty in film breakage, capability of adsorbing and removing residual moisture, difficulty in oxidation corrosion, excellent breakdown resistance and the like, and the preparation method is a preparation method of the high-performance polypropylene capacitor film material; therefore, the technical problem that a polypropylene capacitor film material prepared in the prior art is low in performance is solved.

A film bulk acoustic wave resonator comprising a piezoelectric film having a central region defining a main active domain in which a main acoustic wave is generated during operation, an upper electrode disposed on a top surface of the piezoelectric film, a lower electrode disposed on a lower surface of the piezoelectric film, a dielectric material layer disposed on a lower surface of the lower electrode, and lower recessed frame regions disposed laterally on opposite sides of the central region, the lower recessed frame regions defined by regions of one of the dielectric material or of the lower electrode having a lesser thickness than the thickness of the one of the dielectric material layer or of the lower electrode in the central region.

The invention discloses a corrosion resistance detection device for PFA film production, and relates to the technical field of film corrosion detection. Comprising a box body, a mounting plate is fixedly connected to the interior of the box body, a mounting frame is fixedly connected to the upper end of the mounting plate, a rotating column is arranged on the inner top wall of the mounting frame in a penetrating mode, the rotating column is rotationally connected with the mounting frame, a rotating plate is fixedly connected to the lower end of the rotating column, and a plurality of corrosive liquid dropwise adding mechanisms are arranged on the rotating plate; the multiple corrosive liquid dropwise adding mechanisms are arranged in the circumferential direction of the rotating plate at equal intervals, a rotating mechanism connected with the rotating column is arranged on the mounting frame, a mounting groove is formed in the upper end of the mounting frame, a limiting mechanism is arranged in the mounting groove, and a partition plate located below the mounting plate is fixed in the box body. According to the invention, through movement of the PFA film, different corrosive liquids can carry out corrosion resistance detection on different positions of the PFA film in sequence, so that the corrosion resistance detection process is more efficient.

The embodiment of the invention provides a microresonator and a preparation method of the microresonator, the microresonator can be obtained by connecting an MIM plate capacitor and an inductor of a planar coil structure, and an upper electrode, a lower electrode and the inductor of the MIM plate capacitor and a microstrip line connecting the capacitor and the inductor are all prepared from superconducting materials. A dielectric layer of the MIM plate capacitor can be prepared by adopting an ALD technology, a dielectric film grown by adopting the ALD technology is very compact and has very good thickness uniformity, a relatively high dielectric constant can be realized, and the quality factor of the microresonator can be remarkably improved by combining the zero resistance characteristic of a superconducting material; and the miniaturization of the microresonator can be realized. Moreover, in the preparation process, the three layers of thin films for forming the capacitor and the inductor are formed through deposition firstly, and then the three layers of thin films are patterned layer by layer, so that introduction of excessive impurities can be avoided, interlayer contact can be optimized, and the risk of electric leakage can be reduced.

The invention belongs to the technical field of preparation of diaphragm materials, and particularly relates to a preparation method of a polymer porous membrane, the polymer porous membrane and application. The method comprises the following steps: (1) obtaining a film containing a polymer and a plasticizer; (2) extracting the plasticizer in the thin film by adopting an extracting solution to obtain a wet film; and (3) the wet film is dried, and in the drying process, the size shrinkage rate of the wet film in the TD direction ranges from 5% to 20%. The polymer porous membrane prepared by the method has high-temperature dimensional stability and good air permeability and thickness uniformity.

The invention provides a perovskite thin film and a preparation method thereof, and belongs to the technical field of perovskite thin films, and the preparation method comprises the following steps: S1, preparing modified octa (aminophenyl trioxosilane); s2, preparing a precursor solution; and S3, spin-coating the pretreated substrate with the precursor solution, dropwise adding ethyl acetate at the same time, performing illumination treatment under ultraviolet light, and then immediately performing micro-vibration and curing annealing on the substrate to obtain the perovskite thin film. According to the perovskite thin film obtained by the invention, the purposes of synchronously increasing the open-circuit voltage and the filling factor of a solar cell, improving the photoelectric conversion efficiency and enhancing the long-term stability can be achieved.

The invention discloses a thin film tank pump tower base device, and belongs to the technical field of LNG storage and transportation, the thin film tank pump tower base device comprises a base main body, the base main body is cylindrical, the periphery of the base main body is provided with a first connecting part, and the first connecting part is connected with a first shielding layer; wherein the first connecting part is annular, the first shielding layer is formed by splicing two corrugated plates, the two corrugated plates are integrally formed, a circular through hole is formed in the connected end face of the two corrugated plates, and the two corrugated plates are directly connected with the first connecting part. According to the pump tower base, the corrugated plate is integrally formed, the base body is directly connected with the specially-made corrugated plate, the problem that a conventional pump tower base needs to be in transition connection through a connecting plate is solved, the problem that the connecting plate and the corrugated plate are not smoothly connected is solved, the installation procedure of the pump tower base can be simplified, and the preparation efficiency of a thin film tank is improved.

The invention relates to the field of electromagnetic functional composite materials, and particularly discloses a multi-layer composite structure flexible frequency selective surface material and a preparation method thereof. The ultra-high molecular weight polymer fiber-reinforced polymer-based composite material thin-film mechanical enhanced band-pass frequency selection array sequentially comprises an acrylic acid polyvinylidene fluoride organic polymer coating environment-resistant layer, a metal oxide organic film isolation layer, an ultra-high molecular weight polymer fiber-reinforced polymer-based composite material thin-film mechanical enhanced layer, a band-pass frequency selection layer and a packaging protection layer from top to bottom, and the band-pass frequency selection layer is a hexagonal / circular ring nested band-pass frequency selection pattern array. The packaging protection layer is formed by printing a conductive coating composed of conductive filler / polymer resin matrix, and the packaging protection layer is an ink coating. The flexible frequency selective surface material has the characteristics of light weight, high strength, salt fog / rain / ultraviolet and other severe environments, frequency selective wave transmission and multiple functions, has good gas barrier property, is beneficial to maintaining the shape of an inflatable hangar made of a skin and ensuring normal operation of radar equipment, and has good practical engineering application value.

The invention provides an anti-ferroelectric lanthanum ferrite, bismuth ferrite and strontium titanate superlattice film with high energy storage density as well as a preparation method and application thereof. The anti-ferroelectric lanthanum ferrite, bismuth ferrite and strontium titanate superlattice film with high energy storage density comprises a substrate layer, a bottom electrode layer and a plurality of stacked relaxation ferroelectric layers, wherein the bottom electrode layer and the multiple stacked relaxation ferroelectric layers are sequentially arranged on the substrate layer; each relaxor ferroelectric layer sequentially comprises a first functional layer, a second functional layer and a third functional layer from bottom to top; the first functional layer comprises LaFeO3, the second functional layer comprises BiFeO3, and the third functional layer comprises SrTiO3. The anti-ferroelectric lanthanum ferrite, bismuth ferrite and strontium titanate superlattice thin film with the high energy storage density has small electric leakage performance and high polarization value, and more excellent energy storage performance is achieved.

The invention discloses a vacuum transmission valve and semiconductor thin film equipment, the semiconductor thin film equipment comprises a reaction chamber, a transmission chamber and a vacuum transmission valve, and the vacuum transmission valve is installed between the reaction chamber and the transmission chamber. The vacuum transmission valve comprises a valve box, a valve plate fixing shaft, a first sealing valve plate, a second sealing valve plate and a driving assembly, and the valve plate fixing shaft, the first sealing valve plate, the second sealing valve plate and the driving assembly are arranged in the valve box. The first sealing valve plate and the second sealing valve plate are detachably and fixedly arranged on the valve plate fixing shaft back to back in the radial direction of the valve plate fixing shaft. The driving assembly is used for driving the valve plate fixing shaft to drive the first sealing valve plate to move towards the first opening so as to seal the first opening, and driving the second sealing valve plate to move towards the second opening so as to seal the second opening. The two-way sealing valve plate integrally mounted on the valve plate fixing shaft is driven by the driving assembly to move to achieve two-way sealing, and the occupied space is reduced.

The invention discloses a diamond film and a preparation method and application thereof, and the preparation method comprises the steps: taking a substrate material matched with the lattice constant of a diamond film material as a substrate, and carrying out the surface treatment of the substrate; mixed reaction gas comprising 80%-95% of hydrogen, 3%-8% of methane and 2%-12% of auxiliary gas is introduced, wherein the auxiliary gas comprises at least one of argon, chlorine, hydrogen fluoride and hydrogen chloride; carrying out controlled chemical vapor deposition at 850-1000 DEG C under the pressure of not less than 21 kPa, and growing a diamond film on the surface of the substrate; and annealing the diamond film. According to the method, chemical vapor deposition is controlled through cooperation of auxiliary gas and temperature-pressure gradient, and non-corrosion high-speed growth of the high-purity monocrystal diamond film is achieved; in combination with a dynamic annealing process, lattice defects are effectively repaired, the comprehensive performance is optimized, and the reliability of the thin film serving as a heat dissipation component and other applications is remarkably improved.

In one aspect, a blank is formed of a substrate laminated with a thin polymer film layer. The blank includes fold lines and cutouts such that it is formable into a pack with a base that is fully sealed by the film layer, thereby solving the technical problem of packs formed from blanks where the bases include unsealed gaps or holes. In further aspects, a folded blank, packaging articles formed therefrom, and methods of manufacture are provided.

The invention discloses a multilayer co-extrusion heat-shrinkable film and a preparation method thereof, the film comprises an outer wear-resistant layer, a middle support layer and an inner functional layer, the thickness ratio of each layer is 1: 3: 1-1: 5: 1, the total thickness is 50-150 [mu] m, and the raw materials are prepared according to respective formulas. The preparation method comprises the steps of raw material preparation, melt mixing, die head extrusion, two-way stretching, water-cooling shaping, electronic crosslinking, aging treatment, heating softening and cold and hot shaping. The carbon nanotubes (CNT) and the h-BN nanosheets synergistically hinder crack propagation in the middle layer, so that the crack propagation resistance of the film is remarkably improved, the tensile strength, the thermal shrinkage rate and other properties are also optimized, compared with a traditional film, the comprehensive properties of wear resistance, high strength and high thermal shrinkage rate are achieved through interface collaborative design, meanwhile, the production cost is reduced by 20-30%, and the application prospect is wide. The method is suitable for food packaging, electronic device protection and other fields.

The invention belongs to the technical field of semiconductor material processing equipment, and particularly relates to a bonding system, which comprises a film forming chamber used for preparing a film with active point locations on the surface of an original substrate to form an active substrate; the bonding chamber comprises a first carrier and a second carrier, and the first carrier and the second carrier are respectively used for keeping the active substrates and enabling the two kept active substrates to be opposite to each other; at least one of the first carrier and the second carrier is provided with a force output part, and the force output part is used for outputting force for crimping the active substrate held by the first carrier and the second carrier; and the transmission chamber comprises a substrate taking and placing module which is used for taking and placing the substrates on different stations. According to the bonding system provided by the invention, a very thin active film layer can be prepared on the to-be-bonded surface of the substrate to form the active substrate, bonding can be directly carried out at room temperature, the stress problem caused by mismatching of thermal expansion coefficients of heterogeneous materials can be solved, and the product quality of a bonding sheet is improved.

The invention relates to the technical field of BOPP (biaxially-oriented polypropylene) films, in particular to a scratch-resistant adhesive-free matt film and a preparation method thereof, and the scratch-resistant adhesive-free matt film comprises a matt layer, a core layer and a thermal composite layer which are sequentially arranged, the matt layer comprises co-polypropylene, high-density polyethylene, 2.0-2.5 wt% of linear alkyl silicone (the weight-average molecular weight is 12-150 thousands, and the surface tension is 42-45 mN / m) taking maleic anhydride modified aziridine as a terminal group, and 2000-4000 ppm of spherical polymethyl methacrylate (the particle size D50 is 4.0-5.0 microns); the core layer comprises homo-polypropylene; and the thermal composite layer comprises an ethylene-vinyl acetate copolymer and 2000 to 4000 ppm of a spherical anti-blocking agent. According to the scratch-resistant adhesive-free matt film, through collaborative design of the components of the matt layer and the thermal composite layer, balance of scratch resistance, high surface tension (printing applicability) and winding and unwinding smoothness of the surface of the matt layer is achieved, and a solution for the scratch-resistant generality problem of the matt surface of the high-end BOPP matt film is provided.

The invention discloses a flexible pressure sensor with a multistage hemispherical structure and a preparation method thereof, the sensor comprises an electrode layer, and an upper friction layer, a separation layer and a lower friction layer which are sequentially arranged below the electrode layer from top to bottom, the separation layer is used for providing a space for full contact and separation of the upper friction layer and the lower friction layer, and the separation layer is used for providing a space for full contact and separation of the upper friction layer and the lower friction layer. And the lower friction layer is formed by a multi-stage hemispherical structure constructed on the surface of a flexible film. The sensor has the remarkable effects that benefited from the characteristics of a triboelectric sensing mechanism, the sensor has the advantages of self power supply, stable output and simple structure, and meanwhile, the upper friction layer and the lower friction layer of the sensor are in step-by-step contact under the action of pressure through the surface microstructure of the lower friction layer of the multi-stage hemispherical structure; the compressibility is enhanced, and the contact and separation process of the sensor is optimized, so that the sensitivity of the sensor is improved.

The invention discloses a silk protein-MXene composite film and a preparation method thereof. The silk protein-MXene composite film sequentially comprises a conductive surface layer, a porous response layer and a supporting bottom layer from top to bottom, the invention relates to the technical field of composite films. According to the fibroin-MXene composite film and the preparation method thereof, a three-layer gradient structure is formed by the conductive surface layer, the porous response layer and the supporting bottom layer, good conductivity and electromagnetic shielding effectiveness are ensured by utilizing oriented arrangement of MXene of the conductive surface layer, gallic acid and MXene form a hydrogen bond network, and nitrogen-doped carbon quantum dots coat the surface of MXene to form a physical barrier, so that the electromagnetic shielding effect is improved, and the electromagnetic shielding effect is improved. Through double oxidation resistance of gallic acid and nitrogen-doped carbon quantum dots, a sponge body structure formed by the porous response layer is matched to endow the composite film with high-sensitivity response to external stimulation, the supporting bottom layer is crosslinked by hexamethylene diisocyanate and enhanced by nanocellulose, the tensile strength is improved, and the tensile strength of the composite film is improved. And the contradiction between the mechanical property and the conductivity of the traditional composite film is effectively solved.

The invention belongs to the technical field of heat exchange, and particularly relates to a wall scraping type film evaporator for concentrated liquid based on a hydraulic support, the wall scraping type film evaporator comprises an evaporation cylinder, angle control units are uniformly arranged in the evaporation cylinder in the circumferential direction, and a displacement adjusting unit is arranged at one end of each angle control unit; through toothed belt transmission between toothed belt wheels, the torque between a torsion spring and an angle rod is dynamically adjusted, the vertical dip angle between a scraping plate and the barrel wall of an evaporation barrel is linearly adjusted, and meanwhile the compression amount between a ball head and an eccentric wheel is changed through eccentric interaction between an end ring and the eccentric wheel when the end ring rotates; after the vertical inclination angle of the dynamic adaptive scraper is adjusted, the gap between the scraper and the wall of the evaporation cylinder is constant, the film thickness is stabilized, and the heat transfer uniformity of unit area is improved; the number of teeth and the modulus between the control gear ring and the end dividing gear are linearly adjusted, the steering difference between the steering ring pipe and the angle pipe is dynamically adjusted, the horizontal dip angle between the scraper and the barrel wall of the evaporation barrel is linearly matched, and material flowing and film uniformity are optimized.

The invention discloses a reinforced composite PCB and a preparation method thereof, and belongs to the technical field of PCB preparation. The preparation method of the reinforced composite PCB comprises the following steps: step 1, processing an inner-layer core board to obtain a preprocessed inner-layer core board; 2, cutting, drilling and activating the modified composite film to obtain a treated modified composite film; and 3, sequentially carrying out stacking, hot pressing treatment, pressure relief, cooling, drilling, hole metallization treatment, outer layer pattern transfer, pattern electroplating, outer layer etching, resistance welding, surface treatment, molding and testing on a copper foil, a prepreg, the pretreated inner layer core plate, the prepreg, the treated modified composite film, the prepreg, the pretreated inner layer core plate, the prepreg and the copper foil. And the composite PCB is obtained. The circuit board prepared by the method has excellent thermal stability and mechanical properties.

The present application provides an entropy-regulated composite dielectric film, which comprises a polymer matrix; and fillers dispersed in the polymer matrix, wherein the fillers comprise Bi 4‑a M 1a Ti (3‑3b) M 2b O 12 , wherein M1 comprises at least one of lanthanum, neodymium, samarium and praseodymium, M2 comprises at least one of zirconium, hafnium and tin, 0 The entropy-regulated composite dielectric film has high temperature resistance, high breakdown strength, high polarization strength, high energy storage density and good stability.