83 results about "Carbon dioxide laser light" patented technology

The invention discloses a chip-integrated 2-micrometer wavelength micro laser. The chip-integrated 2-micrometer wavelength micro laser comprises a rare earth doping monox micro ring core cavity and a micro-nano fiber, wherein the micro-nano fiber is located on one side of the monox micro ring core cavity. The monox micro ring core cavity is prepared through the following steps that (1) a rare earth doping monox film is prepared on the surface of a silicon wafer through a sol-gel method; (2) a monox micro disc cavity is prepared on the surface of the monox film through a photoetching process and an etching process; (3) heating reflux treatment is carried out on the monox micro disc cavity through a carbon dioxide laser to obtain the monox micro ring core cavity. The 2-micrometer wavelength micro laser prepared through the sol-gel rare earth doping method has the advantages of being integrated in chip, micro, stable, low in threshold and the like, the energy mode volume in the cavity can be optimized according to the carbon dioxide laser reflux power and time, and a laser with a higher quality is obtained.

The invention relates to a die forming process and particularly relates to a surface hardening process for a metal stamping die. The process comprises the steps of 1) polishing a metal stamping die surface; 2) removing oil stains on the metal stamping die surface; 3) applying a silica light absorbing coating on the metal stamping die surface uniformly, and controlling the thickness to be within a range of 0.04-0.08mm, wherein the silica light absorbing coating comprises, by mass, 5% of nickel base alloy powder, 1% of wolfram carbide and 1% of titanium carbide mixtures; 4) drying the metal stamping die obtained from Step 3); and 5) using a carbon dioxide laser beam to quickly scan the metal stamping die surface obtained from Step 4), and keeping the laser power P of 2800-4000W, the spot diameter of 8-15mm and the scanning speed V of 4-6m / min. Tests prove that the hardening process can improve the abrasive resistance and the rigidity of the metal stamping die surface, reduce grinding time and grinding times and further reduce the usage cost.

The object is to provide carrier foil-incorporated copper foil which permits drilling by a carbon dioxide laser when on the surface of outer-layer copper foil of a copper-clad laminate there is no nickel assist metal layer or an organic material film to increase the absorption of laser light. For this purpose, there is used, for example, carrier foil-incorporated copper foil in which copper foil for printed wiring board manufacturing having a nodular-treated surface on the side of one surface of a bulk copper layer and carrier foil are laminated via an adhesive interface layer on a side opposite to the nodular-treated surface of the bulk copper layer, the bulk copper layer being formed from a high-carbon copper with a carbon content of 0.03 wt % to 0.40 wt %.

At least one surface of a plate member made of ZnSe has a concave-and-convex structure in which a projecting section and a groove section are formed at a spatial cycle equal to or lower than the wavelength of carbon dioxide laser light to thereby provide a substrate body. On a surface of the concave-and-convex structure, an antireflection film is layered that has a lower refractive index than that of ZnSe to carbon dioxide laser light. By this configuration, the polarization state of transmitted carbon dioxide laser light is converted from a linear polarization to a circular polarization or the like.

The invention discloses an all-fiber mode conversion device and method and a detection device. The conversion device comprises a first polarization controller, a mode converter and a second polarization controller, wherein the output end of the first polarization controller is connected with the input end of the mode converter through an optical fiber, the output end of the mode converter is connected with the input end of the second polarization controller through an optical fiber, and the first polarization controller is used for adjusting a light beam to be circularly polarized light or linearly polarized light. The mode converter realizes mode conversion by using a long-period fiber bragg grating inscribed on a few-mode fiber by carbon dioxide laser, and the second polarization controller is used for adjusting the phase difference between vector HE odd-even modes or EH odd-even modes so as to generate an orbital angular momentum mode. By adopting the device and the method providedby the invention, mode conversion with wide bandwidth, high purity mode and high conversion efficiency can be realized, and the device and the method have wide application value in a mode division multiplexing optical fiber communication system.

The invention discloses a method for preparing a bacterial cellulose three-dimensional exhibition microporous bracket, and relates to the technical field of preparation and processing of bracket materials. The bacterial cellulose bracket is obtained by passivating, cutting and freeze-drying bacterial cellulose produced by fermentation of strains. By a computer tomography technology, a math model of a bacterial cellulose bracket three-dimensional structure is constructed; and the specific three-dimensional exhibition microporous bracket is designed by the math model. The math model for a required bacterial cellulose three-dimensional exhibition microporous structure is introduced into a carbon dioxide laser perforation machine and is processed under an environment of -5-10 DEG C; the processed bacterial cellulose bracket is cleaned by secondary distilled water; and then the bacterial cellulose three-dimensional exhibition microporous bracket is obtained by freeze-drying. According to the method, the technology is simple and convenient to operate; sizes of micropores and structures of three-dimensional exhibition holes of the bracket can be adjusted and controlled by methods, such as a method for controlling technical parameters; and the prepared three-dimensional exhibition microporous bracket can be applied to engineering field of construction of tissues, such as skins, bones, ribs and blood vessels.

The invention relates to a method for resin hole plugging after patterning. Implementation of the method comprises the steps of A, preparing a substrate requiring hole plugging after patterning, and preparing transparent PET films torn off after a dry film is mounted; B, mounting the PET films on two sides of a board respectively, and putting a piece of Kraft paper at the outer side to perform normal lamination, wherein the PET films are attached to a substrate after lamination; C, drilling a hole which is smaller than the aperture at each hole site requiring hole plugging by using a carbon dioxide laser drilling machine; D, performing vacuum lamination by using a prepreg, and carrying resin filling on laser drilled holes in the substrate; E, stripping the PET films and the cured prepreg together on the substrate; and F, performing resistance welding and the subsequent general production process. The method is simple to operate, reliable in quality, low in cost and short in production cycle.

A method for manufacturing a flexible optical plate includes steps of: (A) positioning a metallic mask on a surface of a mother substrate; (B) irradiating a carbon dioxide laser beam through the metallic mask to form cavities on the surface of the mother substrate; (C) coating a polymer material on the surface of the mother substrate to fill the cavities; and (D) drying the coated polymer material to form the flexible optical plate, the flexible optical plate having a substrate on the surface of the mother substrate and microstructures protruding from the substrate and each corresponding to one of the cavities.

The invention discloses a construction method and device for a phase-locked multi-channel strip discharging array carbon dioxide laser, and relates to the field of optical engineering and laser application. According to the method and device, the laser obtains high-power phase-locked carbon dioxide laser output through a plurality of rectangular strips according to symmetrical structure configuration and radio-frequency discharging excitation. The method is characterized by comprising the steps of placing a quartz discharging tube or a glass discharging tube on the symmetry axis of a system, enabling the rectangular strips to intersect with one another, symmetrically placing the rectangular strips on the symmetry axis of the system, arranging only one output mirror, enabling the two surfaces of the output mirror to be two parallel plane mirrors or plane convex mirrors, and arranging a convergence system behind the output mirror, wherein a beam of convergent high-power carbon dioxide laser light with the good coherence is obtained after convergence of array parallel beams output from the array carbon dioxide laser through the convergence system. The system is characterized in that oscillation light beams inside the strips are excited by the laser light through convex reflection of the output mirror or the first reflection face of a concave mirror behind the output mirror, wherein the laser light is generated by the discharging tube on the symmetry axis of the system under the action of two mirror cavities on the axis. Therefore, the obtained carbon dioxide laser beams are good in coherence.

The invention provides a construction method and device of a traveling wave cavity high-power carbon dioxide laser, and relates to the field of optical engineering and laser application. The laser comprises a concave mirror, an annular total reflection mirror, a plane output mirror, discharge tubes, water-cooled tubes, positive electrodes, negative electrodes, gas storage chambers, a gas return pipe, discharge tube supports and laser supports. According to the traveling wave cavity high-power carbon dioxide laser, laser beams output from the plane output mirror are distributed symmetrical about a symmetry axis of the laser, and the laser has the advantages of being high in power, good in laser beam quality, compact in structure and small in size and is one of main devices for laser machining. The construction method and device are characterized in that sixteen combined tubes are symmetrically placed on the symmetry axis of the laser, a direct-current power source is used for excitation, and high-power laser light is output under the effect of a traveling wave cavity composed of the concave mirror, the annular total reflection mirror and the plane output mirror. The high-power carbon dioxide laser light can be directly used for laser machining, material processing and the like, and low-power carbon dioxide laser light can be used for laser beautifying, laser surface processing and the like.

The invention discloses a carbon dioxide laser wavelength measuring apparatus which comprises: an optical system, an electronic system and a scanning system. Carbon dioxide laser beams pass through an entrance slit, are reflected into parallel beams by a first collimation sphere reflector and a focusing sphere reflector and then are beamed on a plane diffraction grating whose rotation is controlled by a stepping motor through a sine mechanism so that diffraction beams whose wavelength forms a sine relationship with a plane diffraction grating rotation angle can be obtained. The diffraction beams arrive a tellurium cadmium mercury detector via an objective lens, a second collimation sphere reflector and an exit slit. An emergent light signal which passes through the exit slit is converted into an electrical signal through the tellurium cadmium mercury detector. Through amplification, an A / D conversion, the carbon dioxide laser wavelength can be measured through processing. By using the apparatus, the disadvantages in the current carbon dioxide laser wavelength measuring apparatus can be overcome. Functions are powerful. Cost performance is high. Measuring precision is high. A measuring speed is fast. Operation is easy. The apparatus has many other characteristics. A volume is small. The apparatus is convenient to be integrated into the system to perform the on-line monitoring.

The invention discloses a long-wave carbon dioxide laser isolation device. The device is arranged between a seed laser and a laser amplifier. The device comprises a beam shrinking lens group connectedwith the seed laser, the other end of the beam shrinking lens group is connected with a first sealing window of a hollow-core optical fiber, the other end of the hollow-core optical fiber is providedwith a second sealing window, the second sealing window is further connected with the laser amplifier through a beam expander set, and the hollow-core optical fiber is filled with a gas with the saturated absorption characteristic and is used for allowing laser transmitted in the forward direction to penetrate through and absorbing laser transmitted in the reverse direction. The long-wave carbondioxide laser isolation device can solve the problems that an existing saturated gas absorption isolation device causes light beam distortion, is complex in adjustment, limited in structure and poor in flexibility, and is more flexible, simpler and higher in isolation efficiency.

The invention discloses a medical sealed-off carbon dioxide laser tube which comprises a discharge tube, a water-cooled tube, a gas storage tube, a gas return tube, a total reflector, an anode electrode, an output reflector and a cathode electrode, a nanometer gold coating which plays a catalytic role and a voltage reducing and current stabilizing role is arranged on the inner wall of the discharge tube through a chemical plating technology, and the length of the discharge tube ranges from 0.6 m to 0.95 m. The medical sealed-off carbon dioxide laser tube is suitable for medical use, the power is smaller, the volume is smaller, by means of the nanometer gold coating, the catalytic role of carbonic oxide molecules and oxygen atoms are accelerated, and the service life is prolonged. In addition, the nanometer gold coating further has the voltage reducing and current stabilizing role, the electrostatic voltage of the laser tube can be decreased to range from 160 V to 220 V, the current can be reduced, therefore, working of the laser tube can be more stable, the quality of facula emitted by a laser is guaranteed, and the medical facula requirements are met.

The invention discloses a guardrail capable of preventing a head from being stuck. The guardrail comprises a shell, a guardrail bracket is arranged at the left side of the shell, a device main slidingchute is formed in the guardrail bracket, guardrail bodies are fixedly connected between the guardrail bracket and the ground, a person is possibly trapped by the guardrail bodies, and a transmissionspace is formed in the right side of the shell; and a first hydraulic sliding groove is formed in the upper side of the transmission space. The guardrail can be started, when the person is trapped bythe guardrail bodies, the guardrail bodies are automatically cut off through carbon dioxide laser, the guardrail bodies trapping the head is opened through a hydraulic jacking device, and the trappedperson is separated from the clamped place; the device can automatically detect the head position of the person, and therefore cutting at the appropriate position is carried out; and carbon dioxide laser cutting is adopted, heat is concentrated, and the situation that heat overflows and the trapped people are scalded is avoided.

The invention discloses a carbon dioxide laser cutting machine rack with an automatic feeding mechanism. The carbon dioxide laser cutting machine rack comprises a cutting machine body, wherein a conveying belt is movably arranged on the front portion of the cutting machine body; a containing plate is movably installed inside the cutting machine body; the corresponding containing plate is arrangedon the front portion of the upper surface of the cutting machine body; a red point positioning device is fixedly installed above the upper surface of the containing plate; and a cutting support is movably installed in the middle of the upper surface of the cutting machine body. The carbon dioxide laser cutting machine rack with the automatic feeding mechanism belongs to the technical field of laser cutting, a lifting groove, a movable rod and a fixed rod are arranged to be matched so that the whole conveying belt device can move up and down, and automatic feeding of the cutting machine body isfacilitated; and an arranged abutting block enables a sliding shaft to help the conveying belt to transfer materials needing to be cut to the containing plate, and the red point positioning device isarranged to determine the material position, and then movable fixing plates on the left side and the right side of the containing plate are used for fixing and adjusting the material position.

In a carbon dioxide laser machining method of a multilayer material of applying carbon dioxide laser light to a machined part of a multilayer material having an insulation layer and a first conductor layer and a second conductor layer deposited with the insulation layer between and removing the first conductor layer and the insulation layer of the machined part to form a blind hole or a groove arriving at the second conductor layer, the laser light is applied to the machined part like pulses at an energy density of 25 J / cm2 or more for beam ON time in the range of 1 μs to 10 μs.

The invention relates to the technical field of nasal polyp treatment medical equipment, in particular to a carbon dioxide laser therapeutic instrument for removing nasal polyps. The carbon dioxide laser therapeutic instrument comprises a laser therapeutic instrument main body, a control panel is arranged in the middle of the front end face of the laser therapeutic instrument main body; a displayscreen is arranged on the left side of the upper end face of the laser therapeutic instrument main body; rollers are arranged at four corners of the lower end surface of the laser therapeutic instrument main body; a rotating groove is formed in the middle of the upper end surface of the laser therapeutic instrument main body. The advantages are that by additionally arranging extremely-thin pipelines on the two sides of a laser head, tissue fluid and smoke are evacuated in time through the pipelines, it is guaranteed that an operation is conducted smoothly and stably, and the convenience of theoperation is greatly improved; and through the cooperation of a disinfection box and a storage insertion table, the end part of the optical fiber after the experiment operation is effectively and timely stored, disinfected and dried, and the fracture of the optical fiber and the pollution of the laser head are avoided.

The invention relates to the technical field of carbon dioxide laser instruments, in particular to a carbon dioxide laser instrument for cutting dermatofibroma lesion tissues. The instrument comprisesan output positioning cylinder, the output positioning cylinder is of a cylindrical structure, a clamping connector is integrally arranged at the upper end of the output positioning cylinder, a circle of positioning ring is fixedly welded to the outer ring at the lower end of the output positioning cylinder, an air guide rib is fixedly arranged on the inner ring of the output positioning cylinder, the air guide rib is of a spiral structure, and the outer ring of the output positioning cylinder is sleeved with an air bellow. An air inlet cavity and an air outlet cavity can be fully utilized, airflow forms vortexes in the air inlet cavity and the air outlet cavity, dust accumulation in the air outlet cavity is avoided, and the effects of being free of maintenance and disinfection and free of dead corners can be achieved; due to the fact that air inlet holes and air outlet holes are evenly distributed in the cylinder wall of the output positioning cylinder, air inlet and air outlet are even, and the situation that torrent affects laser output stability can be avoided; and the air bellow is simple in installation structure, high in sealing performance and high in practicability.

The invention relates to a compact carbon dioxide pumping terahertz dual-frequency laser, which comprises a dual-laser main body, a carbon dioxide laser pumping light path and a laser auxiliary system, the dual-laser main body comprises a pumping end vacuum cavity, an output end vacuum cavity, two laser tubes, four invar bars and a pumping end vacuum cavity; the whole carbon dioxide pump light path and the dual-laser main body are fixed on an optical panel, and laser emitted by the carbon dioxide laser enters a cavity through different brewster windows after being subjected to condensation and beam splitting; the output end vacuum cavity is shared by the two terahertz lasers, a high-precision three-dimensional adjusting mechanism is used for fixing the center hole copper mirrors and remotely adjusting the length of resonant cavities of the two lasers under the sealing condition, namely the distance between the two center hole copper mirrors at the pumping end and the output end, and the length of the resonant cavities is accurately adjusted, so that the output power and the difference frequency of the terahertz dual-frequency laser can be controlled.

The invention discloses a carbon dioxide laser cutting machine rack with dust removal and noise reduction functions. The carbon dioxide laser cutting machine rack comprises a main rack body. Supporting legs are arranged on the bottom face of the main rack body. A containing table is arranged on the bottom face in the main rack body. A plurality of partition plates are arranged on the top face of the containing table and penetrate the top face of the main rack body to form partition grooves. A longitudinal track plate is arranged on the bottom face of the main rack body. The carbon dioxide laser cutting machine rack with the dust removal and noise reduction functions belongs to the field of carbon dioxide laser cutting machines with the dust removal and noise reduction functions. A noise reduction device is arranged on the main rack body, noise generated during work of a carbon dioxide laser cutting knife is reduced, and a noise source is prevented from diffusing towards the two sides.An installed dust removal device is used for filtering and removing smoke dust generated during work of the carbon dioxide laser cutting knife. An installed fixing device is used for conducting indirect connecting operation on the transverse track plate, and the transverse track plate moves towards the track plate.

A cladding supermode interference based fiber reflective probe sensor is composed of a single-mode fiber and a cut all-solid photon band-gap fiber, the end, close to the single-mode fiber, of the all-solid photon band-gap fiber is etched with a long-period grating, and the tail end of the all-solid photon band-gap fiber includes a reflection surface. A manufacturing method of the sensor comprisesthat 1) the two ends of the all-solid photon band-gap fiber are connected with a broadband light source and a spectrometer via single-mode fibers respectively; 2) one end of each single-mode fiber atone side of the all-solid photon band-gap fiber is fixed, the other end of the single-mode fiber is loaded with a counterweight, and the all-solid photon band-gap fiber is placed in a processing areaof a carbon dioxide laser marking machine; 3) output laser pulse energy of a high-energy carbon dioxide laser and the period and length of a processing grating are determined, and the grating is written; and 4) one end, far from the long-period grating, of the all-solid photon band-gap fiber is cut and serves as the reflecting surface. The sensor is high in reliability and contract and compact instructure, and can be used for the sensing field, especially for field measurement in the high-temperature environment.

The invention relates to the technical field of laser ink-jet printing equipment, and discloses a carbon dioxide laser ink-jet printer. The carbon dioxide laser ink-jet printer comprises a bottom plate, wherein a workbench is arranged at the top end of the bottom plate, a through groove is formed in the middle of the top end of the workbench, fixing seats are fixedly installed on the left side andthe right side of the top end of the workbench, motors are fixedly installed at the top ends of the fixing seats, and connecting shafts are fixedly installed at one ends of output shafts of the motors at equal angles. According to the carbon dioxide laser ink-jet printer, the motors are started to drive the connecting shafts to move circumferentially and drive a threaded sleeve to rotate, at themoment, a threaded rod can be driven by the threaded sleeve to move relative to the threaded sleeve, two clamping plates can be driven by the threaded rod to get close to or get away from each other,sliding strips on the two sides of clamping plates can move in sliding rails to prevent the clamping plates from deviating, then clamping of a product to be subjected to ink-jet printing is completed,after ink-jet printing is completed, the clamping plates can be controlled to get away from each other to complete discharging, and therefore the advantage of conveniently clamping the product is achieved.

The invention discloses a robot carbon dioxide laser cutting device. The device is used for car interior non-woven fabric cutting and is characterized by comprising a dustproof chamber and a rack arranged in the dustproof chamber. A rotating table is arranged on the rack, multiple car interior clamps are arranged on the rotating table, a robot and a laser generator are arranged in the dustproof chamber, the laser generator is connected with a multi-joint light guide arm, the multi-joint light guide arm is connected to a laser head connected to the clamping end of a robot, a balance device forhanging the multi-joint light guide arm is arranged on the top of the dustproof chamber, the balance device is rotatably connected to the top of the dustproof chamber, the balance device is provided with a sliding rail, the sliding rail is provided with a sliding block with a lifting rope, and the lower end of the lifting rope is connected to the multi-joint light guide arm. The device has the beneficial effects that car interior non-woven fabric 3D cutting can be achieved, a product is finer, the full-automatic cutting manner is achieved, manual work is saved, and due to the dual-station operation, the production takt time is quickened.

The invention relates to medical laser treatment instruments, in particular to a laser microsurgery sighting device. The sighting device comprises a cylindrical shell. The sighting device is characterized in that: a small diameter concave mirror is arranged at one end of the cylindrical shell, and the other end of the cylindrical shell is connected with a focusing cylinder through adjusting threads; a big diameter concave mirror is arranged in the focusing cylinder, and the axis of the small diameter concave mirror is superposed with that of the big diameter concave mirror; a double plane mirror which forms an angle of 45 degrees with the axis is arranged in the cylindrical shell; the double plane mirror is provided with a light transmission hole in the axis direction; the wall of the cylindrical shell on one side of the double plane mirror and the small diameter concave mirror is provided with a light inlet arm interface; the wall of the cylindrical shell on one side of the double plane mirror and the big diameter concave mirror is provided with a light outlet; and the cylindrical shell is provided with a rotary plane mirror support, a rotary plane mirror is connected with the support through a handle adjustor, and the included angle between the rotary plane mirror and the light outlet is 70 to 75 degrees. The sighting device is easy to machine and assemble and convenient to operate, has the advantages of good treatment effect and the like, and enlarges the application range of carbon dioxide laser in medical instruments.

The present invention discloses a carbon dioxide laser tube with a new structure and vacuum flange modules. The carbon dioxide laser tube comprises a tube body, a lens and two vacuum flange modules, the two vacuum flange modules are bonded with the tube mouths of two ends of the tube body, the lens is installed on vacuum flange modules connected with a tube mouths, the tube body is a three-layer annular tube structure, the innermost layer of the tube body is a discharge tube, the middle layer of the tube body is a water cooling tube, the outermost layer of the tube body is a gas storage tube, a steam return is configured to communicate the discharge tube with the gas storage tube, the tube mouth at one end having the steam return is provided with a total-reflection mirror, an anode electrode is arranged at the discharge tube of one end provided with the total-reflection mirror, and an output reflector is arranged at the tube mouth of the other end, and a cathode electrode is arranged at the discharge tube of one end provided with the output reflector. The carbon dioxide laser tube with the new structure and vacuum flange modules effectively improves the vacuum seal requirement of the laser tube, reduces the occurrence of the conditions of gas leakage at the bonding positions of the lens and laser tube mouths, improves the quality and the stability of the carbon dioxide laser tube and prolongs the service life.

The invention relates to a continuous air inlet type carbon dioxide pumping formic acid laser, which comprises a far infrared laser main body, a carbon dioxide laser pumping light path and matched auxiliary equipment, the far infrared laser main body comprises a pumping end vacuum cavity, an output end vacuum cavity, a laser tube and four pieces of invar steel; the carbon dioxide pumping light path comprises a carbon dioxide laser, a first light splitting sheet and a second light splitting sheet, the pumping end vacuum cavity comprises a Brewster window, an eccentric hole copper mirror, a mirror bracket and a stainless steel cavity, and all connecting parts of the cavity are kept sealed; the eccentric hole copper mirror is fixedly arranged in the pumping end vacuum cavity; the eccentric hole of the input end eccentric hole copper mirror is used for enabling the carbon dioxide light to resonate for multiple times, so that the pumping efficiency is improved, and the high-power carbon dioxide laser is prevented from returning to a pumping light path to damage an optical device; and the output end vacuum cavity comprises a poly (4-methylpentene-1) window and a central hole copper mirror arranged in the output end vacuum cavity.

The invention discloses a preparation method and equipment of silicon nitride powder, and relates to the technical field of chemical synthesis. The preparation method comprises the following steps: conveying a silicon powder raw material, introducing nitrogen into a reaction box, carrying out irradiation treatment on the silicon powder raw material by utilizing a carbon dioxide laser, and carrying out photochemical reaction on the silicon powder and the nitrogen to obtain the silicon nitride powder. According to the method, the carbon dioxide laser is adopted to emit carbon dioxide laser to irradiate silicon powder, a silicon material has a very strong infrared absorption spectrum at 10.7 mu m, the 10.6 mu m wavelength of the carbon dioxide laser accords with an absorption peak of silicon, and the 10.7 mu m absorption peak of the silicon material is utilized to absorb energy of the carbon dioxide laser, and a photochemical reaction is generated in the reaction box containing sufficient nitrogen to obtain the silicon nitride powder. Compared with the prior art, the preparation method has the advantages that the preparation cost of the silicon nitride powder is reduced while the preparation efficiency of the silicon nitride powder is greatly improved, so that the preparation production efficiency of the silicon nitride powder is effectively improved.

The invention relates to a manufacturing method of a multilayer wiring board, which belongs to the technical field of integrated circuit and chip processing and manufacturing. A copper foil is pasted on a polyimide film to obtain a copper foil / polyimide two-layer film, then the copper foil / polyimide two-layer film is placed above a circuit substrate and hot-pressed into a laminated board under a hot press, a ferric chloride aqueous solution is used for etching the surface of the copper foil to form a needed hole, then a carbon dioxide laser beam is used for processing the polyimide film to form a blind hole, polyimide residues in the blind hole are etched by using a soft etching solution under the action of ultrasonic waves, finally, one layer is chemically plated to obtain the required through holes, and the process is repeated to obtain the multilayer wiring board. According to the manufacturing method provided by the invention, the steps of continuously and repeatedly laminating the printed circuit board formed by the circuit, then forming the through hole, forming the blind hole through laser processing and finally electroplating are performed, so that the insulating resin layer is not damaged, the electroplating adhesive force of the bottom surface of the copper foil can be improved, and the highly reliable fine through hole can be effectively formed.