28results about How to "Avoid Signal Crosstalk" patented technology

The invention relates to a backside illuminated image sensor preparation method and a backside illuminated image sensor, and relates to the technical field of integrated circuits, the backside illuminated image sensor preparation method comprises the following steps: providing a substrate comprising a first top surface, the first top surface comprising an isolation layer and an initial semiconductor layer stacked in sequence along a first direction deviating from the first top surface; forming a plurality of isolation lamination layers which are arranged at intervals along a second direction on the top surface of the initial semiconductor layer, and sequentially forming a first semiconductor layer and a second semiconductor layer which are laminated and contain different pentavalent elements between adjacent isolation lamination layers; diffusing a first pentavalent element of the first semiconductor layer to the initial semiconductor layer to obtain a first target semiconductor layer; diffusing a second pentavalent element of the second semiconductor layer to the first semiconductor layer to obtain a second target semiconductor layer; and a dielectric layer covering the top surface of the second semiconductor layer and the exposed outer surface of the isolation lamination layer is formed, so that the electron concentration of the photosensitive area is increased, and the photosensitive performance of the BSI image sensor is improved.

The invention relates to a backside illuminated image sensor preparation method and a backside illuminated image sensor, and relates to the technical field of integrated circuits, the backside illuminated image sensor preparation method comprises the steps that a substrate comprising a first top surface is provided, and the first top surface of the substrate comprises first isolation lamination layers and first photosensitive lamination layers which are alternately arranged along a first direction parallel to the first top surface of the substrate; the first photosensitive laminated layer comprises at least three sub photosensitive layers which are alternately laminated along a second direction away from the substrate; in the process of forming a plurality of second photosensitive laminations right above the plurality of first photosensitive laminations, forming a plurality of second isolation laminations right above the plurality of first isolation laminations; the second photosensitive lamination layer comprises at least two sub photosensitive layers which are alternately laminated along a second direction; and forming a plurality of grating laminations right above the plurality of second isolation laminations, and then forming optical filters between the adjacent grating laminations along the first direction. According to the embodiment, the electron concentration of the photosensitive area is increased, and the photosensitive performance of the BSI image sensor is improved.

The invention discloses an amplitude-phase-adjustable microstrip line high-directional coupling structure and a multichannel coupler. The amplitude-phase-adjustable microstrip line high-directional coupling structure comprises a dielectric plate, and an input port, a transmission port, a coupling port and an isolation port which are arranged on the dielectric plate, the input port is connected with the transmission port through the microstrip line, and the transmission port is used for being connected with the antenna port; the coupling port is connected with the isolation port through the two-stage coupling passband; the coupling port is used for outputting a coupling signal; the length of the coupling part of the two stages of coupling passbands can be adjusted; and a phase regulator for regulating the phase is arranged between the two stages of coupling passbands. The phase difference is formed through the distance between two stages of coupling, the amplitude and the phase are adjusted, coupling output is achieved at a coupling port, high isolation is achieved at an isolation port, and the problem that due to the fact that upper and lower media of a microstrip line high-directionality coupler are not uniform, the phase velocities of odd and even modes in the microstrip coupler are different, and the directionality of the microstrip line high-directionality coupler is poor is effectively solved. And the directivity is poor.

The utility model discloses a double-shielding high transmission data cable, including: insulating core wire, buffer hose, aluminum plastic composite tape, ground wire, metal braid layer and sheath, insulating core wire is formed by three insulating layer co-extrusion on the conductor, every two insulating core wire pair twist to form one group of twisted pair wire, each group of twisted pair wire is lapped with aluminum plastic composite tape, the metal braid layer is lapped with the buffer hose, the metal braid layer is lapped with the metal braid layer, the metal braid layer is lapped with the metal braid layer, and the metal braid layer is lapped with the metal braid layer. The four groups of twisted pair wires are twisted into a cable by taking the ground wire as a center, a metal braided layer is braided on the four groups of twisted pair wires which form the cable, an aluminum foil layer on an aluminum-plastic composite belt is in contact with the metal braided layer and the ground wire, a buffer hose is spirally wound on the metal braided layer at equal intervals, and the buffer hose is formed by mixing and extruding a PVC material and aluminum hydroxide particles. And a sheath is extruded on the metal braid layer, is filled in the gap of the buffer hose and is attached to the metal braid layer. The advantages of the utility model are that the cable can maintain the high-speed and high-reliability transmission performance of data signals in a conventional environment and an environment in which a fire disaster occurs or a building collapses.

The invention discloses an electrochemical method for loading adhesive macromolecules on the surface of an electrode and application, rapid and patterned loading of an adhesive layer can be realized by sequentially carrying out cyclic voltammetry and potentiostatic method, and the method has the characteristics of flexibility, simplicity and convenience in operation, wide application range and repeatability. According to the flexible array electrode modified by the electrochemical method provided by the invention, an adhesion layer is only obtained at a conductive part, so that the electrode has excellent adhesion performance and is more attached to the skin of a human body, and the stability of a skin-electrode interface is enhanced; when the electrode is attached to the skin for impedance testing, the skin interface impedance is lower than that of a commercial gel electrode, the monitored electrophysiological signals are stable and accurate, and meanwhile, short circuit and signal crosstalk can be effectively prevented due to the characteristic of the patterned load. The electrochemical method provided by the invention is used as a modification technology, is universal, simple and convenient for the electrophysiological sensor, and also has important significance for reducing the cost of wearable health monitoring equipment and improving the performance of the wearable health monitoring equipment.

The present invention discloses an ultra-low frequency integrated receiving device, which belongs to the field of wireless communication technology. The device of the present invention comprises a preamplifier module, a small signal amplification module, a large signal amplification module, an AD sampling module and a main control module which are electrically connected in sequence; the preamplifier module performs low-noise amplification and low-pass filtering on the input signal; the small signal amplification module performs ultra-low frequency bandpass filtering, a first program-controlled amplification and a power frequency trap on the input signal; the large signal amplification module performs a second program-controlled amplification, program-controlled attenuation, a second power frequency trap and an ultra-low frequency low-pass filtering on the input signal; then the signal is divided into two paths, one path is amplified and then sent to the AD sampling module, and the other path is sent to the main control module after effective value detection; the AD sampling module performs analog-to-digital conversion and down-conversion processing on the input signal; the main control module controls and manages the receiving device; the receiving device of the present invention can realize stable and reliable gain amplification of ultra-low frequency signals.

This invention discloses a multi-channel array integrated gas sensing module. The gas sensing module adopts a three-dimensional stacked structure, divided into an interface layer, a circuit layer, and a sensing layer. The circuit layer and the sensing layer are physically isolated by a sealing partition. The sensing layer includes a multi-channel gas sensing array and a pre-gas path cavity. The multi-channel gas sensing array includes several pairs of sensing units. The circuit layer includes a multi-select analog switch array, an instrumentation amplifier, an analog-to-digital converter, and a communication interface chip connected in sequence. The gas outlet of the pre-gas path cavity faces the sensitive surface of each sensing chip. The differential signal output terminal of each sensing unit pair is connected to the input terminal of the multi-select analog switch array. The communication interface chip is connected to the electrical contacts of the interface layer. The multi-select analog switch switches sequentially according to a preset order, turning on each sensing unit in turn to the instrumentation amplifier. Based on this, this invention achieves miniaturized integration and high signal-to-noise ratio output.

The invention relates to an optical integrated device for a multi-axis optical fiber gyroscope and the multi-axis optical fiber gyroscope. The optical integrated device comprises a photoelectric detector, a first optical fiber and a second optical fiber, the optical switch structure is provided with an input port and N output ports, the ith output port in the N output ports is coupled with the ith optical fiber ring in the external N optical fiber rings, and an optical path between the input port and the ith output port is marked as the ith optical path; wherein in the ith time period, only the ith optical path in the optical switch structure is gated, an optical signal emitted by the light source enters the ith optical fiber ring through the ith optical path after entering the input port and is interfered in the ith optical fiber ring, and interference light returned by the ith optical fiber ring enters the ith output port and then enters the photoelectric detector through the ith optical path; wherein N is a positive integer greater than 1, and 1 < = i < = N. According to the scheme provided by the embodiment of the invention, the measurement precision of the multi-axis optical fiber gyroscope is improved, and the packaging difficulty is reduced.

The application discloses a high-order integrated spatial coherent communication transceiving system based on a REC laser array, which comprises a transmitting end, a spatial channel and a receiving end which are connected in sequence; the transmitting end comprises a signal input module, a first FPGA, an encryption module, a control circuit, a driving circuit array, a first 8x1 REC laser array and a wavelength division multiplexer and an EDFA amplifier; an encryption key is randomly generated based on two characteristics of an arrangement combination mapping relationship of a parallel digital signal after serial-parallel conversion and the first 8x1 REC laser array and uncertainty of laser point-on signals "1" and "0". The application solves the problem that a high-speed spatial communication has extremely high requirements on system hardware performance and is difficult to realize, and can further realize double-layer encryption effect on the basis of speed reduction transmission, thereby improving the security of a high-speed communication system.

This application discloses an aerosol generating device, comprising: a cartridge assembly including multiple spaced cartridges and a mounting bracket for supporting the cartridges; each cartridge is provided with an electronic tag for identifying the cartridge; a power supply assembly connected to the cartridge assembly, the power supply assembly being movable relative to the cartridge assembly to selectively establish an electrical connection with a target cartridge among the multiple cartridges; an identification antenna disposed on the power supply assembly for coupling communication with the electronic tag; and a first shielding member, at least partially disposed between the electronic tags of two adjacent cartridges; wherein, when the power supply assembly establishes an electrical connection with a target cartridge, the identification antenna is aligned with the electronic tag on the target cartridge, and the first shielding member is configured to shield the coupling signal between the identification antenna and the electronic tags on other cartridges. Therefore, this application can avoid the signal crosstalk problem of electronic tags on multiple cartridges and improve the reliability of cartridge identification.

The present application relates to the field of nuclear detection technology, and more specifically, to a multi-section nuclear detection device, including a shock absorbing mechanism, a first detector, a bearing mechanism, a second detector, and a supporting mechanism connected in sequence from top to bottom, wherein: the shock absorbing mechanism is arranged at the top, and a first insulating ceramic is arranged between the shock absorbing mechanism and the first detector; the bearing mechanism is arranged between the first detector and the second detector; the supporting mechanism is connected to the second detector and arranged at the bottom. The present application designs a multi-section detector structure that is easy to disassemble and assemble, and has a stable connection, which greatly reduces the time for disassembly and assembly, has complete shock absorbing components, can effectively reduce the vibration and impact of the detector, uses ceramic insulating blocks to completely separate the detection device from other installation mechanisms, has good insulation performance, and overcomes signal crosstalk. In addition, a moderator bearing structure is also arranged to effectively prevent the moderator from softening, deforming, squeezing, and leaking.

The utility model relates to a VGA male socket connector in the connector technical field, which comprises a hardware shell, a plastic main body and a hardware terminal, the surface of the plastic main body is provided with hardware, one end of the hardware terminal in the horizontal direction is connected with a conductor of a cylindrical structure, one end of the hardware terminal in the vertical direction is in a flat structure, and the other end of the hardware terminal in the vertical direction is connected with the plastic main body. A groove for reducing the surface volume of the hardware terminal is formed in one end of the hardware terminal, which is of a flat structure; the limiting structure is a convex point which is bulged towards one end; according to the utility model, two salient points are respectively stamped on two sides of the hardware shell of the connector through stamping, so that when the connector is assembled with an external mechanism, the distance between the control panel and the connector can be regulated and controlled through the heights of the salient points between the mechanism panel and the connector, that is, when the mechanism panel is locked with the connector, the control panel is locked with the connector through the salient points. And the panel is pressed by the salient points after being contacted with the salient points, so that the panel cannot move forwards any more, and the distance between the panel and the connector is accurately ensured.

The utility model discloses an aluminum base FFC line row connecting structure, including FFC line row, pressure welding terminal and connector shell, FFC line row includes insulating layer and many flat conductors, and flat conductor has the conductive connecting part of the exposed connection mouth formed in insulating layer, and pressure welding terminal sets up the multiple pressure welding thorn for the puncture FFC line row insulating layer on the pressure welding part, and multiple pressure welding thorn rivet pressure fixed on the conductive connecting part on FFC line row, and the FFC line row of this technical scheme adopts the pressure welding process and realizes the mechanical bite fixed between pressure welding terminal and flat conductor, and the complex link such as medium processing, temperature control of welding is saved, and the process cost and operation difficulty are reduced significantly, and the pressure welding thorn punctures insulating layer through mechanical force and directly forms physical bite with the pressure welding of conductive connecting part, and the connecting strength is much higher than the adhesive force of soldering tin, and it is not easy to come loose, and this multi-point bite structure can disperse vibration impact force, and is suitable for the high frequency vibration working condition of automobile battery.

The utility model provides a connector, an endoscope, an endoscope adapter device and an endoscope system. The connector is applied to the endoscope and comprises a first circuit board and a first shell, the first shell is provided with two first annular walls, the first circuit board and the two first annular walls define a first mounting cavity and a second mounting cavity which are spaced from each other respectively, the first circuit board is provided with a first infrared receiver and a first infrared transmitter, and the second circuit board is provided with a second infrared receiver and a second infrared transmitter. The first infrared receiver is completely contained in the first installation cavity, the first infrared transmitter is completely contained in the second installation cavity, a first groove and a second groove are formed in the first shell, the first installation cavity is communicated with the outside through the first groove, and the second installation cavity is communicated with the outside through the second groove. At least two opposite side walls of the two first annular walls are used for blocking infrared communication. According to the connector provided by the invention, the problem of unreliable signal connection caused by the influence of decontamination and the like can be avoided. And full-duplex communication can be realized.

This application discloses an integrated coupled inductor, relating to the field of inductor technology. The integrated coupled inductor of this application includes a first iron core, a second iron core, and a core cover stacked together. A first coil is disposed between the first and second iron cores, and a second coil is disposed between the second iron core and the core cover. The integrated coupled inductor of this application allows the stacked first and second iron cores and the core cover to be combined into a single structure, effectively reducing the volume of the coupled inductor. Simultaneously, the first and second coils are respectively disposed on opposite sides of the second iron core, effectively eliminating interference between the first and second coils and preventing additional power loss and signal crosstalk in the coupled inductor.

The application discloses a portable nose patch device for breath monitoring, and belongs to the field of wearable health monitoring equipment and flexible electronic technology, which comprises a flexible substrate, a central sensing area, and symmetrically arranged side edge areas on both sides of the central sensing area; the central sensing area is provided with an airflow structure cover, a sensor array is integrated in the airflow structure cover to form a sensing and collecting unit, a core control and communication unit is integrated in one side edge area, and an energy storage unit is integrated in the other side edge area; the portable nose patch device for breath monitoring provided by the application improves detection sensitivity through an airflow gathering structure, realizes stable wearing and low-power long-time monitoring through a partitioned and symmetric layout, can accurately identify breath frequency, breath temperature difference, breath flow rate and breath pause state, has multi-modal expansion and signal decoupling capabilities, and effectively solves the problems of large size, uncomfortable wearing, unstable fixing, insufficient precision, single function and easy signal cross talk of existing devices.

This utility model discloses a level gauge junction box, including a box body and a top cover. The box body includes a main body and a bottom plate. The bottom plate of the box body is provided with an annular wall and three radially arranged partitions, which divide the annular wall into three independent chambers. A through hole is provided at each independent chamber on the bottom plate. A connecting pipe is provided on the side wall of the main body. The end of the connecting pipe is provided with multiple elastic teeth. A sealing ring is provided inside the connecting pipe. A connector cap is threadedly connected to the connecting pipe. The level gauge junction box provided by this utility model has improved structural strength and sealing performance at the connecting pipe, thereby significantly improving reliability and practicality in industrial applications.

The utility model discloses a kind of RSU equipment, it is related to electronic toll collection technical field;Single-chip microcontroller and ETC chip are interconnected, single-chip microcontroller is used to control ETC chip and radio frequency amplification unit, the ETC signal of vehicle-mounted unit is transmitted and received by 5.8GHZ antenna, ETC chip and radio frequency amplification circuit are interconnected, single-chip microcontroller and communication module are electrically connected, communication module and SIM card are electrically connected, and the back of the PCB board in the area of radio frequency amplification circuit is provided with heat dissipation window;The utility model integrates the two parts functions of traditional ETC RSU equipment together, it is convenient to install and use, applicable to highway and urban highway use;Reduce electromagnetic interference, inhibit power noise interference, avoid signal crosstalk, improve the stability and reliability of system, it is convenient for fault location and troubleshooting convenient, enhanced module independence, simplify wiring complexity, improve production manufacturing efficiency.

The utility model belongs to the technical field of connectors, and particularly relates to a display port connector, which comprises a metal shell, a rubber shell, a rubber core, a spacer, an upper terminal assembly and a lower terminal assembly, the upper terminal assembly comprises an upper terminal and an upper rubber piece which is formed on the upper terminal in an injection molding manner, and the lower terminal assembly comprises a lower terminal and a lower rubber piece which is formed on the lower terminal in an injection molding manner; the isolation piece is clamped between the upper terminal group and the lower terminal group to form a connection whole, and the isolation piece is used for isolating and shielding the upper terminals and the lower terminals which are distributed up and down; the rubber core is formed on the connecting whole in an injection molding manner, the upper terminal and the lower terminal are provided with exposed contact surfaces, and the tail ends of the upper terminal and the lower terminal extend out of the bottom of one end of the rubber core and are positioned on the same plane; the rubber core is arranged in the rubber shell, and the metal shell wraps the outer side of the rubber shell. The isolation piece isolates signals of the upper terminal and the lower terminal, and signal crosstalk of the upper terminal and the lower terminal is avoided. And normal transmission of signals is ensured. And the data transmission speed and stability are ensured.

The present application relates to a back-illuminated image sensor and a preparation method thereof, and an electronic device, and relates to the field of integrated circuit technology, and includes: a substrate, an isolation stack, and a photodiode and a target isolation structure located on a first surface of the substrate and alternately arranged in a parallel direction and extending toward the substrate; the substrate includes a plurality of trench isolation structures directly below the target isolation structures arranged one to one; the isolation stack is located directly above the target isolation structures arranged one to one; the target isolation structure includes a protrusion that is higher than the top surface of the photodiode and embedded in the isolation stack; the contact surface between the protrusion and the isolation stack is wavy, which improves the isolation structure's ability to intercept electrons and light, increases the amount of light entering the photosensitive area, and reduces the crosstalk of signals between pixels, thereby improving the photosensitivity and image quality of the BSI image.

The utility model discloses a plug-in module and an electric connector, and the plug-in module comprises a lead frame, a plurality of grounding terminals disposed in the lead frame, signal terminals disposed between every two adjacent grounding terminals, and a shielding sheet disposed on one side surface of the lead frame. One end of the grounding terminal and one end of the signal terminal extend out of the lead frame to form a matching end, the other end of the grounding terminal and the other end of the signal terminal extend out of the lead frame to form an installation end, and a first penetrating opening is formed in the side wall, between the grounding terminal and the shielding piece, of the lead frame. The electric connector is characterized in that an elastic abutting unit used for enabling the grounding terminal to elastically abut against the shielding sheet is arranged between the grounding terminal and the shielding sheet. The electric connector comprises an electric insulation shell, and the electric insulation shell is provided with a plugging abutting surface which abuts against a complementary electric connector when the electric insulation shell is in plugging cooperation with the complementary electric connector and an installation abutting surface which abuts against the electric insulation shell when the electric insulation shell is installed on a substrate. And a number of the plug modules supported by an electrically insulating housing.

The utility model relates to a combined type mutual inductor, the combined type mutual inductor comprises a shell, an insulating cover, a first coil, a second coil, a conductor and an insulating part, the shell comprises a first shell and a second shell stacked above the first shell, and the first shell is provided with two first jacks and two second jacks. The insulating cover is arranged in the first shell. The first coil is arranged in the insulating cover. The second coil is arranged in the second shell. The conductor is of a U-shaped bending structure and comprises a first conductor and a second conductor, two pins of the first conductor are inserted into the first jack and are respectively arranged on the inner side and the outer side of the first coil, and two pins of the second conductor are inserted into the second jack and are respectively arranged on the inner side and the outer side of the first coil and the second coil; and the transition sections of the first conductor and the second conductor are arranged in the second shell. The insulating part is arranged in the second shell, a first insulating part of the insulating part is arranged between the first conductor and the second coil, and a second insulating part of the insulating part is arranged between the second conductor and the second coil.

The utility model provides a kind of anti-interference shielding test probe, belong to test probe technical field.The anti-interference shielding test probe, including receiving bin, shielding cover, detection probe, telescopic shielding net and limiting device, the outer wall of the receiving bin is movably sleeved with shielding cover, the inside of the shielding cover is equipped with several groups of slot, the inside of the slot is movably sleeved with detection probe, and the bottom end outer wall of the detection probe is movably sleeved with receiving bin.The utility model has, by the convenient replacement structure of three groups of connecting handle, fixed clamping plate and spring, just need to remove shielding cover sleeve, pull handle to make card pipe slot switching cooperation state, damaged probe can be easily pulled out, spring is automatically reset after handle is loosened, and fixed is completed, replacement process is greatly simplified, maintenance downtime is shortened, especially suitable for high frequency, large batch detection scene, reduce the efficiency loss caused by probe replacement.

This application discloses a screen structure, a smart floor screen, a monitoring method, a medium, and a computer product. The force-bearing layer of this application is adapted to contact a target object. A circuit board layer is disposed below the force-bearing layer, a force-conducting layer is disposed below the circuit board layer, and a force-sensing layer is disposed below the force-conducting layer. The force-sensing layer includes a pressure sensor and abuts against the force-conducting layer to monitor pressure from the force-conducting layer. The force-sensing layer is connected to a base. The force-bearing layer includes a mask structure and a force-conducting structure. Along the direction from the base to the force-bearing layer, the force-conducting structure has two oppositely arranged ends. The first end connects to the mask structure, and the second end connects to the force-conducting layer, so that the pressure from the mask structure is transmitted to the force-conducting layer. The circuit board layer has through holes, through which the force-conducting structure passes. This application can accurately and in real-time monitor the motion state of the target object and can also protect the highly sensitive and high-precision circuit system from damage during frequent high-load motion detection.

The invention provides an insulation detection method, system and device and a storage medium. The method comprises the steps of obtaining a high-voltage output state of a parallel battery system; in response to the condition that the parallel battery system is in a non-high-voltage output state, starting a time-sharing detection mode: controlling a battery management system of each battery pack to sequentially activate an insulation detection circuit in each battery pack according to a preset time sequence so as to obtain a corresponding independent insulation resistance value; and in response to the parallel battery system being in a high-voltage output state, starting an overall detection mode: controlling a battery management system corresponding to one target battery pack to activate an insulation detection circuit in the target battery pack so as to obtain an overall insulation resistance value of the parallel battery system after parallel connection.

The utility model discloses a new energy cable convenient to wiring relates to cable field, including multiple groups of conductor and the socket of setting in multiple groups of conductor one end. That convenient to wiring's new energy cable, through setting in the setting of the splicing mechanism of flat mechanism and setting in the socket inside, first will multiple groups of different function's conductor and arrange in the same plane side by side, and in the conductor outside side wraps insulating isolation layer to fill the interstice, prevents short circuit and signal crosstalk, then covers metal shielding net outside insulating isolation layer and forms faraday cage, effectively blocks electromagnetic interference, and the outermost layer is wrapped with protective packaging layer, makes cable cross section present flat, both ends configuration modular plug and socket, and the plug can be inserted into the annular cavity of socket and realizes plug and play, supports length customization and single -segment replacement. To pass through conductor layering isolation, electromagnetic shielding, modular splicing three big techniques, realize wiring neat, strong anti -interference, maintenance convenient and the advantage such as.

The present invention discloses a preparation process of a flexible temperature-stress sensor, comprising the following steps: preparing a flexible substrate by spin coating using a PDMS solution; preparing a MXene-CNTs stress composite film; preparing a PEDOT:PSS-CNTs-graphene thermosensitive composite film; preparing a SiC film as a dielectric layer; preparing an electrode layer of an equivalent neural conductive network structure; vertically laminating a flexible substrate, an electrode layer, a stress composite film, a dielectric layer, a thermosensitive composite film, an electrode layer, and a flexible substrate in a bottom-to-top order, wherein the lead of the upper electrode layer is placed in the X-axis direction, and the lead direction of the lower electrode layer is placed in the Y-axis direction for vertical lamination, to prepare a flexible temperature-stress sensor. The flexible sensor prepared by the present invention takes into account multiple detection capabilities of temperature and stress, wherein temperature sensing is reacted by the magnitude of the thermoelectric potential, and stress sensing is reacted by the magnitude of the resistance, and the sensing mechanisms are different, which is convenient for temperature and stress decoupling, avoids signal crosstalk, and improves the accuracy of measurement.

The present disclosure relates to the technical field of semiconductor manufacturing, and particularly relates to a packaging substrate and a preparation method thereof. The packaging substrate comprises a substrate and two isolated rings; the substrate comprises a bonding surface and a bottom surface; the two isolated rings extend along the direction perpendicular to the substrate and penetrate the bonding surface and the bottom surface, and define a movable cavity in the middle of the bonding surface with a top surface lower than the bonding surface, and a movable cavity ring surrounding the two isolated rings; the bonding surface around the movable cavity ring comprises a bonding ring; between the top of any isolated ring and the bonding surface surrounding the isolated ring, an anti-overflow isolation groove ring is provided for isolation; the bonding surface around the anti-overflow isolation groove ring comprises a solder pad; adjacent anti-overflow isolation groove rings are connected through the movable cavity in the middle. At least one packaging substrate with excellent electrical isolation performance and good thermal matching can be provided, and the signal crosstalk caused by excessive parasitic capacitance can be avoided while realizing the vertical interconnection of multiple independent signals.