3562 results about "Electrode Contact" patented technology

The invention relates to a micro-display device based on multilayer stacking and a preparation method thereof, the micro-display device comprises a driving backboard and a plurality of pixel layers, and the driving backboard is provided with a first type of electrode contacts; the multiple pixel layers are sequentially stacked in the Z direction, sub-pixels are arranged in each pixel layer, the bottom end of each sub-pixel is electrically connected to the corresponding first type of electrode contact, and the top end of each sub-pixel is electrically connected to the corresponding first conductive layer; in two adjacent pixel layers in the multiple pixel layers, the first conductive layer of one sub-pixel in the upper pixel layer is in direct contact with the first conductive layer of one sub-pixel in the lower adjacent pixel layer. The invention also discloses a preparation method of the micro display device. According to the invention, the processing technology and the cathode interconnection structure are simplified; and meanwhile, the current conduction capability is enhanced, the power consumption of the device is reduced, and the reliability and stability of the display device are improved.

Aspects of the present disclosure relate to flexible catheters for electrophysiological mapping and ablation using high-density electrode arrays. These catheters can be used to detect the electrophysiological properties of tissue in contact with the electrodes and perform monopolar and bipolar ablation of the tissue.

The invention relates to an LED display device based on vertical stacking and a preparation method thereof, the display device comprises a driving backboard and a mother pixel, the mother pixel comprises a plurality of sub-pixels, one of a first type of electrode contact and a second type of electrode contact on the driving backboard is a common-pole contact, and the other one is a non-common-pole contact; the electric connectors comprise common-pole conductive parts and non-common-pole conductive parts, the non-common-pole conductive parts are configured to be electrically connected to the first ends of the corresponding sub-pixels and electrically connected with the corresponding non-common-pole contacts, and the common-pole conductive parts are configured to be electrically connected to the second ends of the sub-pixels and electrically connected with the common-pole contacts to form a common-pole structure; each of the copolar conductive part and the non-copolar conductive part comprises an interconnection conductive part, the interconnection conductive parts are located in the corresponding pixel layers, at least one interconnection conductive part comprises a core body, the core body is a compound semiconductor, and the core body is located in the first inner fence. The invention further discloses a preparation method. The production efficiency and quality of the LED display device can be improved.

According to one embodiment, a method of manufacturing a display device includes forming a lower electrode, forming an insulating layer covering the lower electrode, forming a partition including a lower portion on the insulating layer and an upper portion protruding from a side surface of the lower portion, forming, after the forming of the partition, a pixel aperture in the insulating layer, forming an organic layer in contact with the lower electrode via the aperture, forming an upper electrode which covering the organic layer and patterning the organic layer and the upper electrode to form a display element.

The invention belongs to the technical field of medical instruments, and particularly relates to a spinal epidural ventral side double-wing-shaped stimulation electrode and motion function reconstruction system, the spinal epidural ventral side double-wing-shaped stimulation electrode and motion function reconstruction system comprises two wing panels, each wing panel comprises a flexible substrate, the flexible substrate is provided with two bifurcated preset-curvature double-wing structures; the electrode contact array is integrated on the flexible polar plate through a bonding pad; according to the double-wing-shaped flexible substrate, through a double-wing structure with a preset curvature, after being unfolded under the driving of a nickel-titanium alloy framework, the double-wing-shaped flexible substrate accurately covers a spinal cord ventral side and double-side anterior angle motor neuron pool, and the problem that a traditional single-piece / rod-shaped electrode can only cover a back side sensing area and cannot cover a back side sensing area is solved. The ventral motor neuron group cannot be directly activated; a stimulation target spot is transferred to a ventral functional core area from a dorsal non-target area for the first time, and the anatomical suitability bottleneck of motor function reconstruction is solved.

The invention discloses a cellular structure of a shield gate trench MOSFET and a manufacturing method thereof, the cellular structure of the shield gate trench MOSFET comprises a substrate, a drift region and an interlayer dielectric layer, the drift region is provided with a deep trench, and the deep trench is internally provided with a shield gate, an intermediate oxide layer and a control gate; a body region and a source region are formed at the upper part of the drift region through injection, the interlayer dielectric is provided with a source electrode contact hole which penetrates through the source region and extends into the body region, and highly doped contact regions are formed on the side wall and the bottom of the source electrode contact hole through injection; and a charge balance region is formed below the source electrode contact hole through high-energy ion implantation. According to the invention, by arranging the charge balance region, the lateral depletion of the shield gate to the adjacent drift region can be enhanced when the shield gate trench MOSFET device is in a reverse bias state, the specific on-resistance of the device is reduced, the depletion of the drift region of the epitaxial layer is accelerated, and the reliability and radiation resistance of the device are improved.

The utility model discloses a tumor electric field treatment device and a treatment system, the tumor electric field treatment device is provided with a frame body and a pole piece module, the frame body forms a skeleton structure of the treatment device, the pole piece module is attached to the frame body, the pole piece module is provided with a plurality of electrode contacts, and each electrode contact can form an active contact or a passive contact. The active contact and the radio frequency generation module can form a loop; after the treatment device is implanted into a tumor excision part, all the electrode contacts form active contacts, and all the electrode contacts and the radio frequency generation module form a loop to distinguish normal tissues from pathological tissues; after the normal tissue and the lesion tissue are distinguished, the electrode contacts in the normal tissue area form passive contacts, and the electrode contacts in the lesion tissue area form active contacts, so that targeted treatment of the lesion tissue is realized, and side effects generated by electric field treatment are reduced.

The invention relates to the technical field of heterojunction solar cells, and particularly discloses a selective electrode contact heterojunction cell preparation method and a heterojunction cell, and the method comprises the steps: carrying out the first texturing of a silicon wafer substrate, carrying out the mask layer preparation of the textured silicon wafer, and carrying out the first patterning processing of the silicon wafer. Performing slotting treatment on two sides of the silicon wafer based on picosecond laser, performing secondary texturing on the silicon wafer, placing the cleaned silicon wafer in a second texturing mixed solution so as to generate a large textured pyramid structure on the inner bottom surface of a groove in the two sides of the silicon wafer, and removing the first mask layer from the silicon wafer after secondary texturing to obtain a second textured pyramid structure; sequentially depositing a plurality of layers including an intrinsic amorphous silicon layer and the like on the two surfaces of the silicon wafer, printing a second mask layer in a counterpoint manner in other areas of the silicon wafer which is provided with the groove in the first time of patterning based on exposure and development, electroplating a copper grid line on the silicon wafer, and sequentially removing the second mask layer and a copper seed layer on the silicon wafer after electroplating the grid line; the selective electrode contact copper grid line heterojunction solar cell is obtained, the problem of grid separation of the copper grid lines is solved, and the cell efficiency is improved.

The invention discloses an SJ-MOSFET device. The SJ-MOSFET device comprises a first conductive type substrate; a first conductive type epitaxial layer; a source region; a body region; a second conductive type doped column; the trench gate is arranged on the side surface of the second conductive type doped column and penetrates through the source region and the body region; and the trench pseudo gate is arranged on the side surface of the second conductive type doped column and penetrates through the source region and the body region. On the other hand, the invention discloses a manufacturing method. According to the invention, the grid electrode and the grid electrode groove are arranged on the side surface of the doped column, and a part of the grid electrode groove is arranged in the doped column, so that the area of the grid electrode groove occupying the MESA is small, and the grid electrode groove is arranged towards the interior of the doped column, so that the cell size and the pitch between two source electrode contact holes can be reduced to the greatest extent, and the performance of the MESA is improved. And meanwhile, no JFET resistor exists, so that the optimization of the on-resistance is realized.

The present invention relates to a treatment apparatus using RF energy, a method for controlling same, and a treatment method using same. More particularly, the present invention provides a treatment apparatus using RF energy, a method for controlling same, and a treatment method using same, the treatment apparatus comprising: a handpiece having an electrode configured to contact a skin surface and to transfer RF energy; an RF energy-generating unit for generating RF energy to be transferred to the electrode; a cooling unit provided to cool the electrode; and a control unit for controlling the operations of the RF energy-generating unit and the cooling unit and controlling the cooling unit so as to preliminarily cool the electrode before RF energy is applied to the electrode.

Examples presented herein generally include systems and methods which can contact electrodes to cardiac tissue while sensing electrical potential from fluids near the tissue. The electrodes in contact with the tissue can be carried by an end effector and can be used to sense and / or ablate the tissue they contact. A reference electrode can be insulated by a shaft connected to the end effector so that the reference electrode can sense the electrical potentials from the fluids near the tissue while being prevented, by the shaft geometry, from contacting the cardiac tissue. In some examples, the reference electrode can be tubular, having an inner surface that is configured to contact and sense electrical potentials from the fluids and an electrically insulated outer surface. Configured as such, the reference electrode can serve as an extension of an irrigation tube extending through the shaft.

The invention provides a display module, a preparation method thereof and electronic equipment, relates to the technical field of display, and aims to solve the problems of low imaging quality and the like of the display module. The display module comprises a driving substrate, a conductive grid, a transparent conductive layer and a plurality of miniature light-emitting diodes, the driving substrate comprises a plurality of first electrode contacts and a plurality of second electrode contacts, the miniature light-emitting diodes comprise first electrodes and second electrodes, and the miniature light-emitting diodes correspond to the first electrode contacts one to one. The first electrodes of the micro light-emitting diodes are electrically connected with the corresponding first electrode contacts; the conductive grid is electrically connected with the second electrode contact; the transparent conductive layer covers the plurality of micro light emitting diodes and the conductive grid, the second electrodes of the micro light emitting diodes are electrically connected with the conductive grid through the transparent conductive layer, and the resistivity of the material of the conductive grid is smaller than that of the material of the transparent conductive layer.

The invention relates to the technical field of sockets, and discloses an adapter and a track socket. The adapter comprises a first shell, an instantaneous action mechanism, a plug bush assembly and an electrode contact piece; the instantaneous action mechanism and the plug bush assembly are mounted in the first shell; the first shell comprises a base and a cover body, the cover body is rotatably arranged on the base, a panel of the cover body is provided with a bolt hole, and the side wall of the base is provided with an open hole; the electrode contact piece is electrically connected with the plug bush assembly, and the electrode contact piece and the cover body are respectively connected with the instantaneous action mechanism; and when the cover body rotates to enable the instant-acting mechanism to be in an instant-acting state, the instant-acting mechanism drives the electrode contact piece to extend out of or retract from the open hole. According to the adapter, transient contact power taking can be realized, current arc discharge is avoided, and safe use of a user is ensured.

The invention relates to an LED display device based on vertical stacking and a preparation method thereof. The display device comprises a driving backboard and a mother pixel, the mother pixel comprises a plurality of sub-pixels, one of a first type of electrode contact and a second type of electrode contact on the driving backboard is a common-pole contact, and the other one of the first type of electrode contact and the second type of electrode contact on the driving backboard is a non-common-pole contact; the non-common-pole conductive pieces are configured to be electrically connected to the first ends of the corresponding sub-pixels and electrically connected with the corresponding non-common-pole contacts, and the common-pole conductive pieces are configured to be electrically connected to the second ends of the sub-pixels and electrically connected with the common-pole contacts to form a common-pole structure; each of the copolar conductive part and the non-copolar conductive part comprises at least one interconnection conductive part, a compound semiconductor region is arranged in the pixel layer where the interconnection conductive part is located, a backfill hole is formed in the compound semiconductor region, and the backfill hole is filled with the interconnection conductive part. The invention further discloses a preparation method. The stability and reliability of the LED display device can be improved, and the LED display device is more convenient to process.

The invention discloses a display substrate, a display panel and a display device. The display substrate comprises a substrate body, a plurality of sub-pixels and a pixel limiting layer, the sub-pixels are located on the substrate body, each sub-pixel comprises a light-emitting functional layer, a first electrode and a second electrode, the first electrode and the second electrode are located on the two sides of the light-emitting functional layer in the direction perpendicular to the substrate body, the first electrode is located between at least part of the light-emitting functional layer and the substrate body, and the second electrode is located between at least part of the light-emitting functional layer and the pixel limiting layer. The pixel limiting layer is located between the light-emitting functional layer and the substrate, the pixel limiting layer comprises a plurality of pixel openings and pixel limiting parts located between the adjacent pixel openings, the pixel openings expose at least part of the first electrode, and the light-emitting functional layer makes contact with the first electrode through the pixel openings; a slope angle of 25-35 degrees is formed between at least part of the surface, located on the first electrode and far away from the substrate, of the pixel limiting part and the first electrode, so that scratch of a mask to a light-emitting material in the pixel opening can be reduced, and the product reject ratio caused by the scratch problem is reduced.

The invention relates to an LED display device based on vertical stacking and a preparation method thereof, the display device is provided with a driving back plate and a mother pixel, the mother pixel comprises a plurality of sub-pixels, the driving back plate comprises a first type of electrode contacts and a second type of electrode contacts, and electric connecting pieces comprise copolar conductive pieces and non-copolar conductive pieces. Each non-copolar conductive piece corresponds to a different sub-pixel; one of the first type of electrode contacts and the second type of electrode contacts is a common-pole contact, and the other one is a non-common-pole contact; the driving backboard comprises a plurality of non-common-pole contacts, the plurality of non-common-pole contacts are divided into at least two ring groups, and each ring group corresponds to different sub-pixels; the non-co-polar conductive members are configured to be electrically connected to the non-co-polar contacts in the ring groups of the respective corresponding sub-pixels, and the co-polar conductive members are configured to be electrically connected to the co-polar contacts to form a co-polar structure. The invention further discloses a preparation method. According to the invention, the problem of overhigh local current density in the display device is effectively improved, and the reliability and stability of the device are effectively improved.

There is provided a high withstand voltage LDMOS field-effect transistor that enables the compatibility of an increase of its withstand voltage and a decrease of its ON resistance. The high withstand voltage LDMOS is characterizing in including: a first electroconductive type body region formed on a main surface of a semiconductor substrate; a second electroconductive type source region formed on a surface of the body region; a second electroconductive type drift region formed so as to have contact with the body region; a second electroconductive type drain region formed on the drift region; a first electroconductive type buried region having contact with the body region and formed below the drift region; a gate electrode formed above the body region between the source region and the drift region and above the drift region nearer to the source region via a gate insulating film; a first field plate that extends from the gate electrode toward the drain region and that is formed above the drift region via a first insulating film; and a second field plate that has contact with the source region or the gate electrode and that is formed above the first field plate via a second insulating film, in which a distance between the buried region and the drain region is smaller than a distance between the first field plate and the drain region and larger than a distance between the second field plate and the drain region.

The utility model discloses a split type electric explosion powder manufacturing and spraying device, and relates to the technical field of electric explosion powder manufacturing. The device comprises a mounting plate, wherein the mounting plate is fixedly mounted in an electric explosion chamber. According to the utility model, the plurality of pressing blocks and the conductive assemblies are used for clamping alternately, tension is dispersed, single-point stress is reduced, and the springs provide flexible pressure, so that sudden change of rigid tension is avoided, and the problem of fracture of the wire carrying belt is effectively solved; through recycling of a plurality of conductive assemblies, automatic separation after single-time electric explosion, reduction of powder residues and split synthesis of an electric arc generation area, powder residues and long-time use are avoided, the overheating risk is reduced, and the service life of equipment is prolonged; the rotating disc drives the conductive assemblies and the clamping blocks to be aligned to clamp the wire carrying belt, along with rotation of the rotating disc, the conductive assemblies make contact with the electrodes in turn, cyclic clamping is conducted through the multiple conductive assemblies, and continuity of electric explosion is achieved.

The invention relates to a micro-display device which comprises a driving backboard and a plurality of pixel layers, and a mother pixel comprises a plurality of sub-pixels; the top end of each sub-pixel is electrically connected to the corresponding second type of electrode contact through a top conductive layer, and the bottom ends of the plurality of sub-pixels are interconnected through a bottom conductive layer and then electrically connected to the corresponding first type of electrode contact to form a bottom copolar structure; wherein the axes of all the sub-pixels in the mother pixel do not coincide; in the two sub-pixels of different pixel layers, the bottom conducting layers of the two sub-pixels are connected through a common-pole conducting piece, one side of one sub-pixel in the lower pixel layer is provided with at least one non-light-emitting unit to jointly form a unit body, and the common-pole conducting piece penetrates through one non-light-emitting unit in the unit body. The light efficiency and reliability of the micro display device can be improved.

The invention discloses a method, a sensor and a system for testing an analyte in a biological sample, and belongs to the technical field of biological sample analysis. The method comprises the following steps: contacting a first working electrode and a second working electrode with a biological sample, and inputting a first excitation signal and a second excitation signal to the first working electrode; inputting an excitation signal sequence to the second working electrode between the first excitation signal and the second excitation signal; measuring at least one first output signal responsive to the first excitation signal, at least one second output signal responsive to the second excitation signal, and at least one sequence of output signals responsive to the sequence of excitation signals on the first working electrode; and obtaining the concentration of the analyte in the biological sample according to the first output signal, the second output signal and the output signal sequence. The first output signal, the second output signal and the output signal sequence are used as parameters for calculating the concentration of the analyte in the biological sample, so that the influence of interferents can be eliminated, and the detection accuracy of the test method is improved.

The invention relates to an LED display device based on vertical stacking and a preparation method thereof. The display device comprises a driving backboard and a mother pixel, the mother pixel comprises a plurality of sub-pixels, the driving backboard is provided with a first type of electrode contacts and a second type of electrode contacts, electric connecting pieces comprise copolar conductive pieces and non-copolar conductive pieces, and the non-copolar conductive pieces correspond to different sub-pixels respectively; the first type of electrode contacts are non-common-pole contacts, and the second type of electrode contacts are common-pole contacts; the non-common-pole conductive parts are configured to be electrically connected to the first ends of the corresponding sub-pixels and electrically connected with the non-common-pole contacts corresponding to the sub-pixels, and the common-pole conductive parts are configured to be electrically connected to the second ends of the sub-pixels and electrically connected with the common-pole contacts to form a common-pole structure; an annular reflecting layer surrounds the periphery of at least one sub-pixel, and a first insulating layer is further arranged between the side wall of the sub-pixel and the peripheral annular reflecting layer. The invention further discloses a preparation method. The light-emitting effect of the LED display device is improved.

There is provided a solid-state imaging device including: a first substrate including a photoelectric converter and an electric charge accumulation section for each pixel, the electric charge accumulation section in which a signal electric charge generated in the photoelectric converter is accumulated; a second substrate including a semiconductor layer and a pixel transistor, the semiconductor layer being stacked on the first substrate, and the pixel transistor that includes a gate electrode opposed to the semiconductor layer, and reads the signal electric charge of the electric charge accumulation section; and a through electrode that is provided in the first substrate and the second substrate, and electrically couples the first substrate and the second substrate to each other and is partially in contact with the gate electrode.

The invention relates to an LED display device and a preparation method, the LED display device comprises a substrate and a pixel layer, the pixel layer comprises pixel units, the periphery of each pixel unit is at least surrounded by an annular partition groove, each pixel unit is at least partially overlapped with the outermost annular partition groove of the adjacent pixel unit, and the outermost annular partition groove of each pixel unit is at least partially overlapped with the outermost annular partition groove of the adjacent pixel unit. A compound semiconductor is reserved in the non-overlapping area, or a compound semiconductor is reserved between each pixel unit and the outermost annular partition groove of the adjacent pixel unit, so that the pixel units and the adjacent pixel units are completely separated from each other; the top of each pixel unit is electrically connected with the corresponding second-type electrode contact, the bottom of each pixel unit is electrically connected with the corresponding first-type electrode contact, and the second-type electrode contacts are formed on the periphery of the outermost annular partition groove of the corresponding pixel unit. The invention further discloses a preparation method of the LED display device. The heat dissipation capacity of the LED device can be effectively improved, the LED device can emit light stably, and the photoelectric performance and the reliability of the LED display device are guaranteed.

The invention discloses an electrochemical pressure sensor based on polyelectrolyte gel and a preparation method thereof, and belongs to the technical field of pressure-sensitive elements and pressure sensors. The electrochemical pressure sensor comprises a polyelectrolyte gel pressure sensitive layer, a positive electrode and a negative electrode, wherein the surface of the polyelectrolyte gel pressure sensitive layer is provided with a bowl-shaped groove array structure; the positive electrode is positioned on the upper surface of the pressure sensitive layer; the negative electrode is positioned on the lower surface of the pressure sensitive layer; the polyelectrolyte gel pressure sensitive layer comprises PVA, LiCl and PSS. The surface bowl-shaped groove array structure prepared by using the nucleation effect has excellent pressure-sensitive performance: on one hand, the sensitivity of contact between polyelectrolyte gel and an electrode to pressure is improved, so that the sensor realizes excellent pressure response characteristic; and on the other hand, the surface microstructure gel electrolyte preparation method with less damage to the mold and wider applicability is realized. The electrochemical pressure sensor provided by the invention has the characteristics of high response rate and high output power, and has important value for development of high-performance self-energized pressure sensors.

The invention discloses a lithium battery detection device, relates to the technical field of lithium battery detection, and is used for solving the problems of unstable lithium battery conveying and low detection efficiency in related technologies. The lithium battery detection device comprises a rack, a conveying mechanism, a clamping assembly, a protection assembly and a detection mechanism. The conveying mechanism is fixed to the rack and comprises a conveying belt, and the conveying belt is used for conveying lithium batteries. The clamping assembly is fixed to the conveying belt and used for clamping the lithium battery in the horizontal direction, and at least one electrode of the lithium battery is located on the side, close to the rack, of the clamping assembly. The protection assembly is arranged on the side, close to the rack, of the clamping assembly and makes contact with the lithium battery. The detection mechanism is arranged on the rack, the detection mechanism comprises a detection electrode, and the detection mechanism can push the protection assembly in the direction close to the protection assembly so that the detection electrode can make contact with the electrode of the lithium battery. The lithium battery detection device is used for conveying and detecting the lithium battery.

The invention discloses a monitoring method and system and a related device, which are applied to first electronic equipment, the first electronic equipment is provided with a first circuit, and the first circuit comprises a first electrode, a second electrode, a third electrode, a fourth electrode, an excitation current generation unit and a voltage measurement unit; receiving and responding to a first instruction, and determining that the first electrode and the second electrode are in good contact with skin through a first circuit; first information is determined through the first circuit, the first electrode makes contact with a first position of the user skin, the second electrode makes contact with a second position of the user skin, and the first position and the second position are located at the two ends of the thoracic cavity tissue respectively; and outputting first information, wherein the first information comprises one or more of the following items: cardiac output, stroke output, heart rate, ejection fraction and cardiac function judgment result. Therefore, the heart function condition of the user can be monitored in real time, and the user can conveniently monitor anytime and anywhere.

The invention provides a back contact battery, which comprises a semiconductor substrate, a first doping layer, a second doping layer and an electrode contact part, and is characterized in that the electrode contact part is arranged on the first doping layer; the main body part of the first doping layer and the main body part of the second doping layer are alternately distributed on the backlight surface of the semiconductor substrate at intervals, the first region of the first doping layer is electrically connected with the first region of the second doping layer, and the conduction types of the first doping layer and the second doping layer are opposite; wherein at least one concave structure is formed on the backlight surface of the semiconductor substrate, and the at least one concave structure is arranged between the electrode contact part and the electrical connection part. The invention also provides a photovoltaic module. According to the back contact battery provided by the invention, the hot spot risk of the back contact battery is further reduced by forming the concave structure.

A semiconductor package includes a buffer die and a memory die sequentially stacked. The buffer die includes a first substrate having first and second surfaces, a through electrode extending through the first substrate and having a protrusion portion, a protective pattern on the second surface of the first substrate and covering a sidewall of the protrusion portion, a first conductive pad on the protective pattern and contacting the through electrode, and a filling pattern contacting an upper surface of the protective pattern and a sidewall of the first conductive pad and including an inorganic insulating material. The memory die includes a second substrate having first and second surfaces, and a second conductive pad and a conductive connection terminal sequentially stacked beneath the first surface of the second substrate. The first conductive pad contacts the conductive connection terminal.

The invention provides implantable electrical stimulation equipment and a control method, device and system thereof, the equipment comprises a controller, an impedance detection device, a stimulation circuit, a switching circuit and an acquisition circuit, and the controller is configured to obtain a characteristic value of a waveform of an ECAP signal of a body of a patient in a current posture; measuring a first impedance value of a body, between the first electrode contact and the second electrode contact, of the patient through an impedance detection device, and determining contact conditions of the first electrode contact and the second electrode contact with the body of the patient based on the first impedance value; and determining whether to switch different electrode contacts to transmit pulses according to the contact condition and the characteristic value. When the electrode contacts are twisted and are in poor contact with the body of a patient, a proper electrode contact is switched in time to output a treatment pulse, so that the treatment part is accurately stimulated, and the accuracy and the treatment effect of the treatment process are ensured.

A back contact solar cell, a preparation method and a battery assembly, which belong to the technical field of crystalline silicon solar cells. The back contact solar cell comprises: a semiconductor substrate, the back surface of which includes first polarity regions and second polarity regions alternately arranged in a first direction; a first functional layer, which is disposed in the first polarity regions; a second functional layer, which is disposed in the second polarity regions; a laser protection layer, which is disposed on the side of the second functional layer away from the semiconductor substrate and exposes electrode contact regions of the second functional layer, wherein the material of the laser protection layer includes laser absorption material; first electrode structures, which are disposed on the side of the first functional layer away from the semiconductor substrate; and second electrode structures, which are disposed on the side of the second functional layer away from the semiconductor substrate and located in the electrode contact regions.