62 results about "Green tape" patented technology

The invention relates to the field of textured low-temperature co-fired ceramic materials, in particular to a textured low-temperature co-fired ceramic material and a preparation method thereof. According to the invention, a part of Al2O3 powder is replaced by flaky alpha-Al2O3, and the flaky alpha-Al2O3 is directionally arranged in the green tape along the tape casting direction through tape casting, so that the arrangement mode can play a role in increasing crack deflection and bridging in the fracture process of the textured low-temperature co-fired ceramic material; the bending strength of the textured low-temperature co-fired ceramic material is improved, and therefore the technical problem that an existing textured low-temperature co-fired ceramic material is poor in mechanical property is solved.

The invention discloses an LTCC (Low Temperature Co-Fired Ceramic) green tape as well as a preparation method and application thereof, and the preparation method comprises the following steps: mixing LTCC formula powder and additive phase powder to obtain mixed powder; mixing the mixed powder, a dispersing agent and a solvent, and performing first ball milling treatment to obtain a first ball milling product; adding an adhesive and a plasticizer into the first ball-milling product, and carrying out second ball-milling treatment to obtain a second ball-milling product; filtering the second ball-milled product to obtain ceramic slurry for tape casting; drying the casting ceramic slurry to obtain an LTCC (Low Temperature Co-Fired Ceramic) green tape; wherein the weight ratio of the LTCC formula powder to the additive phase powder is (50-95): (5-50); the LTCC formula powder comprises ceramic powder and glass powder; the additive phase powder is at least one of hexagonal boron nitride, fluorophlogopite sheets, bismuthate-based tungsten bronze and phosphate glass. According to the LTCC green tape prepared by the preparation method disclosed by the invention, the technical problem that the machinability and the thermal conductivity of an LTCC green substrate prepared by an existing LTCC green tape are relatively poor can be solved.

The invention provides an LTCC green tape, an LTCC substrate, a copper co-fired LTCC substrate and a preparation method thereof, and the preparation method of the LTCC green tape comprises the following steps: S1, putting weighed powder into a ball milling tank, adding a solvent and a dispersant, carrying out ball milling and mixing, then adding a binder and a plasticizer, and continuously carrying out ball milling to obtain tape casting slurry; the powder material comprises the following components in percentage by mass: 40wt% of aluminum oxide ceramic powder, 55wt%-60wt% of BMCS glass powder and 0-5wt% of CMAS glass powder; and S2, carrying out vacuum defoaming on the tape casting slurry, and carrying out tape casting to obtain the LTCC green tape. The bending strength of the LTCC substrate formed by the LTCC green tape provided by the invention is improved on the premise of ensuring excellent dielectric properties, and the flat copper co-fired LTCC substrate is formed by matching and co-firing the LTCC green tape and the copper paste in a nitrogen atmosphere, so that the cost is greatly reduced.

The invention discloses a high-reliability packaging quality assessment method and system based on multi-source process data, and relates to the technical field of quality assessment, and the method achieves the online sensing of the orientation consistency of casting ceramic particles through the nondestructive scanning of an unsintered green tape by adopting a terahertz spectrum. Material waste and procedure interruption caused by destructive detection are avoided; secondly, the cutting edge morphology is synchronously collected in the scribing process, geometric feature quantification is carried out, the recognition of the edge breakage state is improved from subjective qualitative judgment to objective quantitative characterization, and the detection consistency and precision are remarkably improved; the frequency spectrum coding data reflecting the internal quality and the shape coding data reflecting the external defects are associated point by point, and a two-dimensional mapping relation of the internal process parameters and the external processing results is constructed, so that whether the cutting edge breakage is derived from potential abnormity in a tape casting stage or not can be accurately traced; and a data closed loop is provided for backtracking optimization of process parameters.

A roll-to-roll sintering system for wide inorganic tape material may include a spool on which is wound a continuous tape material comprising a green tape material and a backing layer, a take-up reel, and a heating station including at least one furnace. The heating station is configured to receive an unwound length of the continuous tape. The heating station further includes a first curved section such that the continuous tape material is bent through a radius of curvature of 0.01 m to 13,000 m, and at least two rollers defining the first curved section over which the continuous tape material is bent. The heating station is controlled to provide at least a portion of the heating station with an air free atmosphere, that being at least one of vacuum, hydrogen, or helium.

A sintered cathode includes a first surface, a second surface opposite the first surface, a sintered polycrystalline material, a thickness greater than or equal to 5 µm, and a porosity less than 35%. The polycrystalline material includes a plurality of crystal grains having a layered rock-salt structure. A crystal direction of the plurality of crystal grains is random relative to a first surface and a second surface. A method of forming a sintered cathode includes mixing lithium-containing particles and cobalt-containing particles to form a LCO precursor powder including a LT-LCO phase, dispersing the LCO precursor powder in a binder and a solvent to form a slurry, tape casting the slurry to form a green tape including the LT-LCO, and sintering the green tape to form a sintered cathode including a HT-LCO phase and a random grain texture.

The application provides an isolated guide plating process for ceramic packages, which comprises: preparing ceramic slurry, then injecting the slurry into a casting machine to form green tape, and then cutting the green tape into green sheets; punching, injecting slurry and printing corresponding circuit on each green sheet, then laminating and cutting; printing circuit on each green sheet respectively, so that the required lead is metallized and led out from a substrate, punching so that the isolated guide area on the substrate is communicated with another substrate, so that the isolated guide area is led out and conducted from the other substrate; printing end, metallizing the lead and the isolated guide and sealing area; sintering; chemical nickel plating, assembling, soldering and electroplating, and finally polishing the end to obtain a ceramic package; and the bonding area and the chip bonding area are free of bumps.

The invention relates to a bone-like layered calcium silicate / tricalcium phosphate heterogeneous biological ceramic as well as a preparation method and application thereof. The preparation method of the bone-imitating layered calcium silicate / tricalcium phosphate heterogeneous biological ceramic comprises the following steps: (1) mixing calcium silicate powder, an additive and a solvent to obtain calcium silicate tape casting slurry; mixing the tricalcium phosphate powder, an additive and a solvent to obtain tricalcium phosphate tape casting slurry; (2) respectively carrying out tape casting on the calcium silicate tape casting slurry and the tricalcium phosphate tape casting slurry to obtain a calcium silicate green tape and a tricalcium phosphate green tape; (3) alternately laminating the calcium silicate green tape and the tricalcium phosphate green tape, and performing pressurization treatment to obtain a composite ceramic body; and (4) degumming and sintering the composite ceramic green body to obtain the bone-like layered calcium silicate / tricalcium phosphate heterogeneous biological ceramic.

This utility model relates to the field of raw material tape production technology, and in particular to a cooling and curing device for raw material tape production. It includes a housing with a first air outlet. A wind-cooling mechanism for cooling the raw material tape is connected to the housing. An open water tank is fixedly connected to the bottom of the housing. A first rotating roller is rotatably connected inside the open water tank. A second and third rotating rollers are rotatably connected inside the housing, with the first rotating roller located between the second and third rotating rollers. This utility model releases cold air to cool the raw material tape after the wind-cooling mechanism is activated. The cold air enters the housing and is released from the first air outlet. The raw material tape, cooled by the cold air, comes into contact with the cooling water in the open water tank. The cooling water provides secondary cooling to the raw material tape—first by the cold air, then by the cooling water—thus improving the cooling and curing effect of the raw material tape.

A sintered cathode includes a first surface, a second surface opposite the first surface, a sintered polycrystalline material, a thickness greater than or equal to 5 µm, and a porosity less than 35%. The polycrystalline material includes a plurality of crystal grains having a layered rock-salt structure. A crystal direction of the plurality of crystal grains is random relative to a first surface and a second surface. A method of forming a sintered cathode includes mixing lithium-containing particles and cobalt-containing particles to form a LCO precursor powder including a LT-LCO phase, dispersing the LCO precursor powder in a binder and a solvent to form a slurry, tape casting the slurry to form a green tape including the LT-LCO, and sintering the green tape to form a sintered cathode including a HT-LCO phase and a random grain texture.

The invention relates to the field of ceramics for semiconductors, and discloses aluminum nitride ceramic tape casting slurry, a high-elongation aluminum nitride ceramic green tape and a preparation method and application thereof.The aluminum nitride ceramic tape casting slurry is prepared from, by mass, 70-75 parts of aluminum nitride raw powder and 25-30 parts of organic solvent through mixing and ball milling, the dispersing agent accounts for 0.5%-0.8% of the mass of the aluminum nitride raw powder, the binder accounts for 3%-10% of the mass of the aluminum nitride raw powder, the composite preparation accounts for 1%-9% of the mass of the aluminum nitride raw powder, and the composite preparation comprises dioctyl phthalate, dibutyl phthalate and dioctyl adipate according to the mass ratio of (2-4): (1-2): (1-2). By adopting the composite preparation with a specific ratio, the uniformity and flowability of the tape-casting slurry can be remarkably improved, the surface defects of a green belt are reduced, the elongation rate of the tape-casting slurry is up to 37%, the processing requirements of tubular curved surface structure aluminum nitride ceramic parts can be met, the cracking risk in the glue discharging and sintering process is reduced, and the service life of the tape-casting slurry is prolonged. The method can be widely applied to preparation of special-shaped ceramic elements for semiconductor equipment.

The invention discloses an instant-fired silicon nitride ceramic substrate and a preparation method thereof, a roll-to-roll tape casting technology is adopted, boron nitride, silicon nitride and boron nitride are subjected to tape casting in sequence to obtain a thick film green tape with a boron nitride / silicon nitride / boron nitride three-layer structure, and finally, the instant-fired silicon nitride ceramic substrate with good flatness and high strength is prepared through glue discharging and sintering.

The invention provides a composite teflon tape for manufacturing a multi-layer circuit and a preparation method and application thereof. The composite teflon tape comprises a PET paper bottom and a CLST / EPF composite medium semi-cured film. The CLST / EPF composite dielectric semi-cured thin film is prepared by mixing EPF resin slurry and modified CLST ceramic powder and then performing semi-curing molding. The EPF resin slurry is composed of bisphenol F epoxy resin, methylhexahydrophthalic anhydride and 2, 4, 6-tri (dimethylaminomethyl) phenol; the modified CLST ceramic powder is CaOLiOSmOTiO ceramic powder which is modified by a KH-550 silane coupling agent, and the modified CLST ceramic powder is CaOLiOSmOTiO ceramic powder; the preparation method comprises the following steps: mixing the EPF resin slurry with the modified CLST ceramic powder, coating the mixture on the PET paper base, and then carrying out semi-curing molding. The prepared raw material belt can be semi-cured and formed at low temperature, the size stability is good, the dielectric constant can be regulated and controlled through the ceramic content, the dielectric loss is small, the preparation method can be compatible with an existing PCB production line, and therefore the manufacturing cost is reduced.

The invention relates to a method of preparing a microneedle array, comprising the steps of dissolving a water-soluble copolymer, comprising maleic anhydride and isobutylene monomers, in an aqueous solvent to obtain an aqueous solution, adding a ceramic material to said aqueous solution to obtain an aqueous ceramic slurry for gel casting, adding at least a portion of said aqueous ceramic slurry to a mould to obtain a layer of aqueous ceramic slurry in said mould, degassing said layer of aqueous ceramic slurry to obtain a degassed layer of aqueous ceramic slurry in said mould, gelling said degassed layer of aqueous ceramic slurry to remove said aqueous solvent from said aqueous ceramic slurry and removing said mould to obtain a gelled tape, drying said gelled tape to obtain a green tape, sintering said green tape to obtain said microneedle array. Further, the invention provides for a green tape, comprising a base plate and a set of microneedles integrated with said base plate, a microneedle array, comprising a base plate and a set of microneedles integrated with said base plate, a system for enabling transport of a substance through a material barrier, and a use of a microneedle array for intradermal drug or vaccine delivery, diagnostics, cosmeceuticals,, sensing of biomarkers found in the skin and monitoring of physiological conditions of the body.

The invention provides a method for improving the surface flatness of an HTCC substrate, and the thickness of a finished substrate is n. The method is characterized by comprising the following steps: step 1, overlapping n-1 layers of green tapes with the thickness of a, and overlapping z layers of green tapes with the thickness of b, bgt, at the top; a, a dielectric layer is arranged between every two adjacent green tapes; 2, sintering is conducted, a semi-finished substrate is formed, and the sintering temperature ranges from 1650 DEG C to 1850 DEG C; and thirdly, the top face of the base plate is ground and polished, and the thickness of the ground base plate is n. The flatness of the surface of the substrate can be effectively improved, and the substrate with higher precision can be manufactured conveniently.

The invention belongs to the technical field of phased-array antennas, and particularly relates to a fully conformal ultrathin integrated phased-array antenna and a manufacturing process method thereof. The manufacturing process method comprises the following steps of: planarizing an expandable curved surface, and manufacturing a positioning hole, a conducting hole, a heat dissipation hole, a circuit pattern and a cavity on a green tape according to a circuit design drawing; a special high-precision curved surface alignment lamination tool is used for loading a half-green ceramic tape; sequentially placing a PET (Polyethylene Terephthalate) film and a silica gel film on the raw ceramic tape for coating, carrying out vacuum encapsulation by adopting a transparent plastic encapsulation tape, and then carrying out warm water lamination operation; sintering the green tape by adopting a curved quartz glass sintering bracket, and pressing the green tape by adopting a quartz pressing block during sintering; the curved surface gasket is adhered to the bottom of the groove of the green tape by using a conductive adhesive, and then the chip is adhered to the curved surface gasket. According to the fully conformal ultrathin integrated phased-array antenna and the manufacturing process method thereof, integrated design is achieved, and cracking, wrinkling and layering occurring after the substrate is curved are avoided.

A method of forming a ceramic substrate includes heating lithium cobaltite (LCO) precursor powder in a furnace at a furnace temperature greater than or equal to 300° C. and less than or equal to 950° C. to at least partially remove lithium from surfaces of particles of the LCO precursor powder, dispersing the LCO precursor powder in a binder and solvent to form a slurry, tape casting the slurry to form a tape, drying the tape to remove the solvent and form a green tape, debinding the green tape to remove the binder and form a brown tape, and sintering the brown tape to consolidate the LCO precursor powder and form a ceramic substrate. The binder includes poly(propylene carbonate), poly(propylene-co-cyclohexene carbonate), n-butyl methacrylate, polybutyl acrylate, poly(propylene), poly(isobutylene), poly(styrene-co-butadiene), poly(ethylene-co-vinyl acetate), poly(vinyl acetate), poly(vinyl alcohol), or combinations thereof.

A sintered membrane is a ceramic article having a primary crystal phase including lithium-aluminum-titanium-phosphate crystals and a secondary crystal phase including anatase or lithium-titanium-oxyphosphate crystals. In aspects, the sintered membrane can have a closed porosity of less than or equal to 5%. In aspects, the primary crystal phase can be from 95% to 100% of a volume of the ceramic article, and the secondary crystal phase can be from greater than 0% to 5% of the volume of the ceramic article. In aspects, the sintered membrane can exhibit a total leaching of less than or equal to 5 parts-per-million in a Leaching Test. Methods of making a sintered membrane includes forming a green tape having lithium-aluminum-titanium-phosphate crystals and an additive including a titanium-containing powder or an aluminum-containing powder, where the green tape is heated to a first temperature from 600°C to 1200°C to form the sintered membrane.

This utility model relates to the technical field of positioning devices, and in particular to a positioning device for rotating tire carcass barcodes. During tire carcass rotation, a barcode detector scans the barcodes on the upper or lower part of the carcass, avoiding scanning limitations. A positioning component fixes the rotating housing, thereby improving the accuracy of the barcode detector when scanning the tire carcass barcode. The device includes a conveyor belt and a housing, with the housing positioned above the conveyor belt. It also includes a drive device, a positioning component, an adjustment device, multiple sets of clamping components, a bracket, and two sets of barcode detectors. The multiple sets of clamping components are all mounted on the housing via the drive device, moving in opposite directions. The housing is mounted on the positioning component, which drives the housing to rotate and move, and also positions the rotation of the housing. The bracket is horizontally mounted on the adjustment device, and the two sets of barcode detectors are mounted opposite each other on the upper and lower parts of the bracket.

The invention discloses acid-corrosion-resistant green slurry for LTCC (Low Temperature Co-Fired Ceramic) printing marks and a preparation method of the acid-corrosion-resistant green slurry, belongs to the field of LTCC and manufacturing thereof, and aims to provide slurry for marks, which is good in binding force with a ceramic body and is not easy to fall off after being sintered. The green printing paste capable of being applied to the field of LTCC is prepared from the raw materials according to the proportion of the powder and the organic binder, the paste can be co-fired with an LTCC green tape at the temperature of 850-900 DEG C, a green mark after sintering can be free of color fading and defect after being barreled for 20 minutes through a hydrofluoric acid aqueous solution with the concentration of 0.1 wt% at most, and the preparation method is simple and easy for large-scale production.

The invention relates to the technical field of heating tubes, in particular to a preparation method of an LTCC (Low Temperature Co-Fired Ceramic) heating tube, which comprises the following steps: preparing an LTCC raw belt, preparing a through hole, filling the through hole, printing a conductive heating circuit, preparing a conductive bonding pad, spraying glue, laminating and wrapping tubes, isostatic pressing, discharging glue, sintering and welding a lead. According to the preparation method of the LTCC heating tube, the production efficiency can be effectively improved, the production cost can be reduced and the LTCC heating tube with excellent performance can be prepared by optimizing the process parameters and the operation flow of each step, so that the preparation method has a wide application prospect.

Set forth herein are processes and materials for making ceramic thin green tapes by casting ceramic source powders and precursor reactants, binders, and functional additives into unsintered thin green tapes in a non-reactive environment.

The invention discloses an electromagnetic shielding material for electrical equipment and a preparation method and application thereof, and relates to the field of electromagnetic shielding, and the preparation method comprises the following steps: preparing a multi-layer composite foil a and a multi-layer composite foil b, and respectively crushing the multi-layer composite foil a and the multi-layer composite foil b into multi-layer composite foil powder a and multi-layer composite foil powder b; mixing an adhesive with the multi-layer composite foil powder a and the multi-layer composite foil powder b to obtain slurry a and slurry b, performing gradient tape casting on the slurry a and the slurry b to obtain a primary green tape, and printing silver-based slurry on the primary green tape to obtain a silver-based green tape; after segmented degreasing is conducted on the silver-based green body belt, low-temperature activated sintering is conducted, then high-temperature densification sintering is conducted, and a gradient sintering material is obtained; and after the gradient sintering material is subjected to surface leveling treatment, a nickel-phosphorus protection layer is formed on the surface of the gradient sintering material through chemical plating, and the electromagnetic shielding material is obtained. The problems that shielding of a low-frequency magnetic field and shielding of a high-frequency electric field cannot be considered, and spectrum adaptability is insufficient are solved.

The invention relates to the technical field of thickness control, and discloses a ceramic green body tape casting thickness control method and device.The method comprises the steps that thickness measurement is conducted on a tape casting green body through a plurality of laser sensors arranged at the downstream preset position of a scraper, and the maximum deviation difference value is calculated; when the maximum deviation difference value is larger than a preset threshold value, a partition compensation mode is adopted, and when the maximum deviation difference value is smaller than or equal to the preset threshold value, a global compensation mode is adopted; when the partition compensation mode is adopted, the scraper left axis compensation amount, the scraper middle axis compensation amount and the scraper right axis compensation amount are calculated through the first compensation coefficient; when the global compensation mode is adopted, the unified compensation amount is calculated and assigned to the scraper left axis compensation amount, the scraper middle axis compensation amount and the scraper right axis compensation amount at the same time, and the control precision and uniformity of the casting thickness of the ceramic atomization core blank are improved.

A roll-to-roll sintering system for wide inorganic tape material may include a spool on which is wound a continuous tape material comprising a green tape material and a backing layer, a take-up reel, and a heating station including at least one furnace. The heating station is configured to receive an unwound length of the continuous tape. The heating station further includes a first curved section such that the continuous tape material is bent through a radius of curvature of 0.01 m to 13,000 m, and at least two rollers defining the first curved section over which the continuous tape material is bent. The heating station is controlled to provide at least a portion of the heating station with an air free atmosphere, that being at least one of vacuum, hydrogen, or helium.

The application discloses a preparation method of a multilayer composite crosslinking ceramic flow-casting green tape, which comprises the following steps: inputting slurry into multiple interval-mounted material boxes of a flow-casting machine, making the carrier tape pass through the material boxes and making the slurry in the material boxes be stacked on the carrier tape layer by layer to be flow-cast into a multilayer composite crosslinking flow-casting green tape; the slurry comprises silicon nitride ceramic powder, a sintering aid, a solvent, a binder, a dispersing agent, a plasticizer and a crosslinking agent; the plasticizer is at least one of cashew phenol Mannich tiglic acid ester, dibutyl phthalate, dimethyl phthalate and polyethylene glycol, and the dispersing agent is at least one of fish oil, castor oil and polyvinylpyrrolidone. The obtained green tape is uniform, smooth and flat, free of cracks, wrinkles and bubbles, has good toughness and high strength, is not easy to deform, and has adjustable thickness, and the problem that a crosslinking system ceramic green tape is difficult to flow thick is solved.

The invention discloses a method for manufacturing an LTCC (Low Temperature Co-Fired Ceramic) substrate, which belongs to the technical field of LTCC substrate manufacturing, and comprises the following steps: carrying out tape casting on prepared slurry to obtain a green tape, cutting off the green tape, opening holes in the cut green tape, carrying out silk-screen printing, and carrying out leveling operation after all hole filling layers are filled in the silk-screen printing, and performing lamination and isostatic pressing on the printed green ceramic tape to form a Bar block, cutting the Bar block into product units, performing degumming sintering on the product units, and performing nickel-tin-lead plating on the sintered product to form a final product. According to the method, leveling operation is carried out on the raw tape after hole filling, silver paste at the positions of the leveled raw tape holes is completely pressed in the holes, and normal printing is continued after leveling, so that connection of the upper layer and the lower layer in a manufactured product is complete, the reliability of the product is improved, virtual connection of through holes of the LTCC substrate can be avoided, the reliability of electric connection between the upper layer and the lower layer of the LTCC substrate is improved, and the service life of the LTCC substrate is prolonged. And the product failure risk is avoided.

The invention provides a manufacturing method of a piezoelectric driving device and the piezoelectric driving device. The manufacturing method comprises the following steps: preparing piezoelectric ceramic slurry, and carrying out tape casting to obtain a green tape; punching on the green tape according to a set pattern, wherein the punching part is an electrode reserved area; printing and filling inner electrodes on the punched green tapes, and stacking the green tapes layer by layer; pressing the stacked green tapes into block green bodies through an isostatic pressing process; the block green bodies are cut into independent green bodies, and then the green bodies are subjected to glue discharging and sintering so as to be sintered into piezoelectric actuator chip units; grinding the sintered piezoelectric actuator chip unit to a specified shape and size; grooving the ground piezoelectric actuator chip units to form a rectangular or annular array; coating end electrodes on two opposite end surfaces of the piezoelectric driver chip units forming the array; welding the piezoelectric actuator chip unit coated with the terminal electrode on a circuit board, and electrically connecting the piezoelectric actuator chip unit with the circuit board; and after polarization, coating insulating glue, and then curing and molding.

The invention discloses a rare earth-microcrystalline glass-bio-fiber synergistic low-temperature sintering LTCC raw material belt and a preparation method thereof, and relates to the technical field of low-temperature co-fired ceramics, the rare earth-microcrystalline glass-bio-fiber synergistic low-temperature sintering LTCC raw material belt comprises an inorganic solid phase and an organic system; wherein the inorganic solid phase is prepared from the following components in percentage by mass: 55 to 70 weight percent of Li2Mg (1-x) RxTi3O8, 25 to 43 weight percent of Li2O-Al2O3-B2O3-SiO2-ZnO-MnO2, 0.2 to 1.0 weight percent of a grain boundary pinning agent and 0.3 to 1.2 weight percent of delignified nano cellulose; the organic system comprises the following components in percentage by mass: 6-14wt% of a binder, 1-3wt% of a dispersing agent and the balance of a mixed solvent of ethanol and butyl acetate. The method has the effects that the sintering temperature is reduced to 780 DEG C, the dielectric loss is reduced by 40%, and co-firing of the silver electrode is zero in diffusion and bubble.

The invention provides an LTCC raw material belt with a low thermal expansion coefficient, an LTCC substrate and a preparation method of the LTCC substrate, tape casting slurry is prepared by adjusting the proportion of silicon nitride ceramic, cubic boron nitride ceramic, CBAS and MASB microcrystalline glass powder, and the LTCC raw material belt with the low thermal expansion coefficient is obtained through tape casting; the raw material belt is sintered for 2-3 hours at 900-950 DEG C in a nitrogen atmosphere, good co-firing, flat interface and tight fitting with low-cost copper electrode slurry can be realized, an LTCC substrate with excellent comprehensive performance is prepared, the thermal expansion coefficient is 3.1-4.0 ppm / DEG C, the dielectric constant is 5.5-6.5, the dielectric loss is 0.002-0.004, the bending strength is 310-400 MPa, the thermal expansion coefficient is 3.1-4.0 ppm / DEG C, and the thermal conductivity is 30-44 W / (m.k). And the deformation quantity in a wide temperature range is small, and the heat dissipation performance is excellent.