1107 results about "Surface film" patented technology

The invention discloses a sealing gasket easy to open. The sealing gasket comprises an upper layer, a connecting layer and an adhesive sealing composite layer which are sequentially compounded from top to bottom, the upper layer comprises a surface film; the bonding and sealing composite layer comprises a lower connecting film, an electromagnetic induction heating layer and a bonding and sealing layer which are sequentially compounded from top to bottom; the connection layer includes a connection adhesive, the connection layer composites the upper layer and the adhesive composite layer by the connection adhesive, and an unbonded region is formed between the upper layer and the adhesive composite layer. The door has the advantage of being easy to open.

The invention relates to a locally hydrophobic glass bead and a preparation method thereof, and is characterized in that the preparation method comprises the following steps: (1) selecting a glass bead with D50 of 5-100 [mu] m and a particle size distribution span of not more than 0.2, and cleaning and drying the glass bead; (2) placing glass beads on a substrate provided with a group of spherical grooves; (3) treating the exposed surfaces of the glass beads by using a hydrophobic agent alkyl siloxane or fluorinated siloxane solution, and then carrying out heat treatment to complete curing and film forming; and (4) stripping the glass beads subjected to surface film formation from the substrate provided with the spherical grooves. The invention has the advantages that the glass bead with a hydrophilic and hydrophobic composite surface and the preparation method of the glass bead are provided; the locally hydrophobic glass beads can play a role similar to a surfactant or a coupling agent when being used as an emulsion coating filler or an organic resin-based composite material filler, so that the mixing uniformity of the locally hydrophobic glass beads in a material system is effectively improved, and the binding force is improved.

The invention discloses a single-piece type sealing gasket which comprises an upper layer, a connecting layer and an adhesive sealing composite layer which are sequentially compounded from top to bottom. The adhesive sealing composite layer comprises an electromagnetic induction heating layer and an adhesive sealing layer which are sequentially compounded from top to bottom; the upper layer comprises a surface film, and the lower surface of the upper layer is divided into a non-sticky area and a strong sticky area; the connecting layer comprises an adhesive and a release coating; the release coating is coated on the non-adhesive area of the lower surface of the upper layer, and the connecting layer is used for compounding the strong adhesive area of the lower surface of the upper layer with the adhesive sealing composite layer through an adhesive. The single-piece type sealing gasket is easy to open.

A biaxially oriented industrial or household compostable film web having at least three co-extruded layers selected from the group consisting of a facing film layer, a sealant film layer, and a combination of sealant film layers and facing film layers, wherein the sealant film layer and the surface film layer each comprise from 0 wt% to about 80 wt% of a polyhydroxyalkanoate (PHA) and from about 20 wt% to about 100 wt% of a polylactic acid (PLA), and optionally a small amount of a blend of other biopolymers, other polymers, nucleating agents, chain extenders, fatty amides, and fillers; and a core film layer comprising from about 30 wt% to about 80 wt% of a polyhydroxyalkanoate (PHA), from about 20 wt% to about 40 wt% of a polylactic acid (PLA), and optionally a small amount of a blend of other biopolymers, other polymers, nucleating agents, chain extenders, fatty amides, and fillers.

The invention belongs to the technical field of back contact cells, and particularly relates to a back contact cell manufacturing method for improving passivation performance and a back contact cell thereof, and the method comprises the steps: S2, depositing a first semiconductor layer and a phosphorosilicate glass layer on the back surface of a silicon wafer, and reserving the first semiconductor layer and the phosphorosilicate glass layer as a first mask layer; s3, performing texturing cleaning on the front surface of the silicon wafer; the first mask layer is removed in the final cleaning process after texturing; s4, forming a passivation layer and an anti-reflection layer on the front surface of the silicon wafer; s5, coating the back surface to form a second mask layer; s6, forming a second semiconductor opening region; and S7, texturing or polishing the second semiconductor opening area on the back surface, and cleaning by using an HF solution with the mass concentration of 0.5%-5% to remove the second mask layer and the winding plating layer generated in the front surface coating process in the S4. The back surface winding plating layer does not need to be removed, damage to the first semiconductor layer and the front surface film layer can be avoided, the overall passivation level can be improved, and therefore the battery efficiency is improved.

The utility model provides an automatic telescopic greenhouse shed which comprises a shed frame and a thin film, the thin film is located outside the whole shed frame, the shed frame comprises a barrel-shaped steel frame set, a steel frame shed rod and an anti-falling rail, and a lateral film rolling set is arranged on the barrel-shaped steel frame set; the steel frame shed rods are located on the upper portion of the barrel-shaped steel frame set, and a top film rolling set is arranged on the multiple steel frame shed rods. The anti-falling rail is fixed to the top of the barrel-shaped steel frame set and used for guiding the steel frame shed rods to slide and stretch out and draw back; a telescopic matching group is arranged among the plurality of steel frame shed rods, and the steel frame shed rod at one end is fixed on the anti-falling track; the greenhouse has the advantages that the internal temperature can be changed by changing the structural change of the greenhouse body, the greenhouse can be applied to more greenhouse use scenes with different temperature control requirements, the use of a temperature control device is reduced, and the temperature control efficiency is improved. And the method has extremely high economical efficiency.

The invention discloses a method for forming a shallow trench isolation structure, and belongs to the technical field of semiconductors, the method for forming the shallow trench isolation structure comprises the steps of forming a first stop layer on a substrate, etching the first stop layer and a part of the substrate, and forming a trench; an insulating material is deposited in the groove and on the first stop layer, a second stop layer and a sacrificial layer are sequentially deposited on the insulating material, and the insulating material, the second stop layer and the sacrificial layer are provided with recesses in the groove; the sacrificial layer is ground and thinned until the second stop layer is exposed, and part of the sacrificial layer is reserved at the concave position of the second stop layer; and synchronously etching the second stop layer and the sacrificial layer until the second stop layer is completely removed. A stop layer and a sacrificial layer are deposited on an unground insulating material, the height difference of a wafer surface film layer is preliminarily compensated by using a grinding process, and then the residual film layer is synchronously consumed by using an etching process, so that the height difference of the insulating material is reduced, and the difficulty of a CMP (Chemical Mechanical Polishing) process is reduced.

The invention discloses aluminum gusset plate surface film coating processing equipment, and aims to solve the problems that the surface temperature of a film coating roller needs to be set to be far higher than the activation temperature of a glue layer in the conventional equipment, so that the temperature control requirement on a heating element is relatively high, otherwise, a film is easy to shrink and deform to a certain extent under the action of high temperature. According to the technical scheme, the aluminum gusset plate surface film coating machining equipment is characterized by comprising a film coating roller, a matching roller and a driving part for driving the matching roller to rotate, a plate input platform is arranged at the front end of the film coating roller and the front end of the matching roller, and a plate input assembly is arranged on the plate input platform. According to the aluminum gusset plate surface film coating processing equipment, a film is preheated step by step through the preheating assembly, the temperature of the film is closer to the temperature needed by film coating when the film reaches the film coating position, the heating temperature of the film coating roller only needs to be controlled to be slightly higher than the activation temperature, and the heating temperature requirement of the film coating roller is lowered; and the problem that the film shrinks and deforms due to overhigh surface temperature of the film laminating roller is avoided.

The invention provides a rare earth doped gallium oxide thin film material and a preparation method and application thereof. The preparation method comprises the following steps: in a vacuum chamber, depositing a thin film on the surface of a cleaned substrate by using a rare earth oxide doped gallium oxide target material through a single-target radio frequency sputtering method to obtain the rare earth doped gallium oxide thin film material. Rare earth elements are doped in gallium oxide through a single-target radio frequency magnetron sputtering method, physical properties such as forbidden bandwidth of the gallium oxide material are regulated and controlled, application of the gallium oxide material in the field of photoelectric detection or semiconductor light-emitting devices is widened, and the obtained rare earth doped gallium oxide thin film material is uniform in surface film formation and high in yield. The average transmittance at the wavelength of 350-800 nm is greater than 90%, and the doping concentration of rare earth elements in the gallium oxide thin film material can be adjusted by directly replacing target materials with different doping proportions; the preparation method disclosed by the invention is simple, does not need expensive equipment, has obvious cost advantage and is suitable for large-scale production.

The invention discloses a device and a method for measuring geometric parameters and performance parameters of a sample, the device comprises a white light interference measurement module, a Raman spectrum measurement module and an ellipsometry measurement module, and the white light interference measurement module and the Raman spectrum measurement module adopt a partial common-path design. Common-optical-path measurement of Raman spectrum data and interference fringe images is achieved, the surface appearance and material composition information of the same measurement point position can be obtained at the same time, and in-situ high-precision obtaining of geometric parameters and material composition information in ellipsometry modeling is achieved. The condition of analysis errors caused by inconsistent information carried by different measurement points of the heterogeneous film is avoided, and the precision and the reliability of an ellipsometry measurement result can be greatly improved. According to the method for measuring the geometric parameters and the performance parameters of the film layer on the surface of the wide bandgap semiconductor wafer, the morphological information and the performance parameters of the heterogeneous film can be comprehensively and accurately measured and represented by combining the ellipsometric spectrum, the white light interference, the Raman spectrum and other technologies.

The invention relates to a low-temperature liquid medium storage container and a construction and arrangement method of a metal film on the inner wall of the low-temperature liquid medium storage container, and belongs to the technical field of low-temperature liquid medium storage. The structure of the metal film comprises a top surface film, a right side surface film, a bottom surface film, a left side surface film, four transition surface films, a front surface film and a back surface film which are respectively arranged on the top surface, the right side surface, the bottom surface, the left side surface, four transition surfaces, the front surface and the back surface of the annular side surface of the low-temperature liquid medium storage container, the top surface film, the right side surface film, the bottom surface film and the left side surface film are respectively connected with the four transition surface films to form an annular side surface film; and the front film and the back film are connected through the annular side film to form a totally-closed three-dimensional film.

The invention relates to an in-situ analysis detection method and device for electrical contact surface film damage. The in-situ analysis detection method comprises the following steps: 1) adjusting the height and angle of a sample test platform to a proper position; 2) switching on an electric contact test platform circuit, simulating an in-situ working process of an electric contact, and obtaining electric contact information and elliptically polarized light detection information; (3) transmitting polarized light detection information to light source acquisition equipment, and (4) establishing a proper physical optical model and a vibrator model, and performing data fitting analysis to obtain the in-situ change condition of the surface of the electrical contact. By adopting a non-contact in-situ spectrum testing technology, the early-stage in-situ failure process of the electrical contact is accurately, quickly and nondestructively detected in real time, and an equipment means and a test basis are provided for research on an electrical contact early-stage failure mechanism of an electrical contact material.

The invention discloses a crack detection device, method, storage medium and system, and relates to the technical field of diamond damage detection.The crack detection device comprises a machine table, and the upper end of the machine table is fixedly connected with an equipment mounting table; the main tower module is arranged at the upper end of the equipment mounting table; the diamond clamping modules are fixedly mounted at the lower end of the main tower module; the surface film pasting module is fixedly mounted on the left side of the upper end of the equipment mounting table; the surface crack detection module is fixedly mounted on the left side of the upper end of the equipment mounting table; the ultrasonic detection module is fixedly mounted on the right side of the upper end of the equipment mounting table. According to the scheme, based on image detection and ultrasonic vibration detection technologies, integrated automatic detection of surface crack detection and internal crack detection of the CVD diamond wafer is carried out by utilizing the main tower rotating mechanism, so that the detection process can be effectively shortened, and the crack detection efficiency of the CVD diamond wafer is improved.

The utility model relates to the technical field of space cloth structures, in particular to a wear-resistant space composite material. The wear-resistant space composite material comprises a first surface film layer, a second surface film layer, space base cloth, a second bottom film layer and a first bottom film layer which are sequentially stacked from top to bottom in a centerline alignment manner, the width of the first surface film layer and the width of the space base cloth are both larger than the width of the second surface film layer; the width of the first bottom film layer and the width of the space base cloth are both larger than the width of the second bottom film layer. According to the wear-resistant space composite material, the paste used for laminating each layer is always positioned between the space base cloth and the surface layer during extrusion, so that the production efficiency and the yield are improved.

The utility model belongs to the technical field of presswork surface film covering devices, and particularly relates to a presswork surface film covering device which comprises a workbench. An auxiliary film covering device is mounted on the workbench; the top of the clamping frame is fixedly connected with a supporting frame. An air blowing pipe is mounted between the rotating shafts; an air blowing nozzle is mounted on a pipe body of the air blowing pipe; an air pump is mounted at the top of the filter box; a connecting hose is mounted on the filter box; the end part of the connecting hose is connected to the air blowing pipe; the end part, extending out of the outside, of the rotating shaft is fixedly connected with a pointer; a first gear is installed at the position, close to the pointer, of the end of the rotating shaft in a sleeving mode. Scale marks are carved on the structural surface of the fixed block; the second gear is meshed with the first gear; and through the action of the auxiliary film laminating device, bubbles between the film and the printed matter are extruded out, the bubble discharging structure is prevented from making contact with the film, and it is guaranteed that film laminating operation is conducted smoothly.

The invention provides an injection molding part surface film covering device for air conditioner production, and belongs to the technical field of air conditioner production. The injection molding part surface film covering device comprises a synchronous belt conveyor, a plurality of tray frames, a lower supporting mold, an injection molding part, a lifting module and a film covering module; the film covering module comprises a mounting frame, a first air cylinder, an upper mold shell, a first pressing plate, a first flexible pressing block, a second pressing plate, a supporting plate, an L-shaped guide rail frame, a third pressing plate and a slotting cutter, and further comprises a cutting unit used for cutting a film. By means of the injection molding part surface film covering device for air conditioner production, the basic requirement for covering a protective film on the surface of an air conditioner injection molding part can be met, pressing can be conducted through the air bag diffused in the center, sufficient film covering and attaching of a large curved surface structure are guaranteed, the attaching flatness is guaranteed, wrinkles are avoided, and the service life of the air conditioner injection molding part is prolonged. Therefore, the film can be more firmly attached to the air conditioner injection molding part, and the film can better protect the air conditioner injection molding part.

The invention discloses a petal-pulling type sealing gasket which comprises an upper layer, a connecting layer and an adhesive sealing composite layer which are sequentially compounded from top to bottom. The upper layer comprises a surface film; the adhesive sealing composite layer comprises an electromagnetic induction heating layer and an adhesive sealing layer which are sequentially compounded from top to bottom; the connecting layer comprises a connecting adhesive and a petal pulling layer; the connecting layer is used for compounding the upper layer and the adhesive sealing composite layer through a connecting adhesive, and an unbonded area is formed between the upper layer and the adhesive sealing composite layer; the flap pulling layer is arranged in the non-bonding area, and the flap pulling layer is compounded with the upper layer through a composite adhesive and / or the flap pulling layer is compounded with the bonding and sealing composite layer through an adhesive. The door has the advantage of being easy to open.

The invention discloses a low-temperature curable bismaleimide resin-based composite material surface film and a preparation method thereof, relates to the field of bismaleimide resin composite material surface films, and aims at solving the problem that the curing temperature of an existing bismaleimide resin composite material surface film is too high. The surface film is composed of bismaleimide resin, an allyl compound, thermoplastic resin, a catalyst and a fluidity control agent. The preparation method comprises the following steps: adding the allyl compound into a reaction kettle, heating and stirring, adding the thermoplastic resin, cooling, adding the bismaleimide resin, continuously heating and stirring, and carrying out double-roller hot rolling film forming on the bismaleimide resin and a carrier for manufacturing an adhesive film through an adhesive film machine to prepare the low-temperature curable bismaleimide resin surface film.

The invention discloses charger multi-surface film pasting equipment, and aims to provide charger multi-surface film pasting equipment which is simple in structure, can synchronously perform material film stripping and film pasting operation, and can accurately paste films on the surfaces of chargers with multiple special-shaped curved surfaces. The device comprises a rotating disc carrier assembly, a feeding assembly, a plane film pasting assembly, an arc surface film pasting assembly and a corner surface film pasting assembly, the feeding assembly comprises a ping-pong carrier module and a mechanical arm module, and the ping-pong carrier module and the mechanical arm module are arranged at the feeding position of the rotating disc carrier assembly; the rotating disc carrier assembly comprises a rotating disc bottom plate, a rotating motor and a plurality of product positioning carriers, the product positioning carriers are evenly arranged on the upper end face of the rotating disc bottom plate, and the rotating motor is rotationally matched with the rotating disc bottom plate; the mechanical arm module, the plane film pasting assembly, the arc surface film pasting assembly and the corner surface film pasting assembly are matched with the charger products on the product positioning carriers correspondingly. The invention is applied to the technical field of product film pasting.

The invention belongs to the technical field of micro-nano machining, and particularly relates to a preparation method of a diamond color center array based on a phase separation nano mask. The invention comprises two schemes. The scheme I comprises the following steps: pretreating a diamond raw material; depositing a hard mask layer on the surface of the diamond; coating an adhesion layer; coating a phase-separable patterned block copolymer or assembling high polymer materials such as biological macromolecules and the like; the diamond is subjected to annealing treatment; forming a nano mask by selectively etching the surface film layer; injecting nitrogen ions to form an NV color center array; removing the hard mask; and surface carbon impurities are removed through vacuum high-temperature annealing and acid pickling, and the high-quality color center array is obtained. The second scheme comprises a deposition step of simplifying a hard mask, and a phase-separable patterned high polymer material thick film is directly coated on the surface of the diamond raw material. By adopting two different technological processes, the preparation of the nano mask ion implantation color center array which is low in cost, high in mask precision and resolution, high in flux, extensible and large in area is realized.

A display device that includes a display element including a light source, and a surface film disposed so as to overlap with the display element and including a thermoplastic elastomer composition, the thermoplastic elastomer composition satisfying conditions (1) and (2) below, and the surface film satisfying conditions (3) and (4) below: (1) The melt flow rate (ASTM D1238, 230° C., 2.16 kg load; MFR) is not less than 30 g / 10 min. (2) The type A hardness (momentary value) measured by a method in accordance with JIS K6253 is 60 to 90. (3) The thickness is not less than 300 μm and not more than 2 mm. (4) The total light transmittance measured by a method in accordance with JIS K7361 is 3 to 60%.

The invention discloses a metalized back contact solar cell structure and a manufacturing method thereof, and the structure comprises a silicon substrate, a front surface film layer structure disposed at the upper end of the silicon substrate, a silicon substrate surface film layer structure, an emitter region film layer structure, and a silicon substrate surface film layer structure disposed on the back surface of the lower end of the silicon substrate. The surface film layer structure of the silicon substrate sequentially comprises a first tunneling passivation dielectric layer and a back surface doped film layer from top to bottom; a passivation dielectric film layer is arranged at the lower end of the silicon substrate surface film layer structure; the emitter region film layer structure is intermittently nested in the silicon substrate surface film layer structure, and the emitter region film layer structure comprises a second tunneling passivation dielectric layer and an emitter doped film layer from top to bottom in sequence; and a special gap structure is arranged between the silicon substrate surface film layer structure and the emitter region film layer structure. Due to the specific parameter setting of the gap structure, the reverse bias value of the back contact cell structure can exceed the reverse bias value borne by an existing solar cell with electrodes arranged on the two faces.

The invention belongs to the technical field of high polymer material composite tarpaulin, and particularly relates to tear-resistant PVC (polyvinyl chloride) composite vehicle tarpaulin, equipment, a preparation method and application. The tarpaulin for the vehicle is composed of base cloth and PVC films attached to the two sides of the base cloth through PVC slurry. Wherein the PVC slurry comprises the following materials: 100 parts of PVC paste resin, 90-120 parts of a plasticizer, 4-8 parts of an adhesive, 11-12 parts of a viscosity reducer and 25-35 parts of PVC calcium powder; the thickness of the PVC slurry permeating into the base cloth is less than or equal to 1 / 3 of the thickness of the base cloth. Vehicle tarpaulin manufacturing equipment is improved, the bottom film pressing wheel and the surface film pressing wheel are additionally arranged to improve attachment of a PVC film and a large cylinder, an original padding process is changed into a transfer sizing method by means of the modified transfer sizing wheel set, the sizing gram weight and screen cloth permeation can be reduced, and the production efficiency is improved. The tarpaulin tearing performance is improved; and the tarpaulin has good stripping resistance and the like.

The invention provides an electrode plate, a secondary battery and an electric device. The electrode pole piece comprises a current collector and a film layer located on at least one surface of the current collector, the film layer is provided with a first surface away from the current collector and a second surface arranged opposite to the first surface, the thickness of the film layer is marked as H, and an area within the thickness range from the second surface of the film layer to 0.3 H is marked as a first area of the film layer, the area from the first surface of the film layer to the thickness range of 0.3 H is marked as the second area of the film layer, the first area and the second area both contain a binder, and the ratio of the mass content of the binder in the second area to the mass content of the binder in the first area is 0.4-1.7; the preparation method of the electrode pole piece comprises the following steps: coating: coating at least one surface of a current collector with electrode slurry, and drying to obtain an initial pole piece; and heating treatment: carrying out electromagnetic induction heating treatment on the surface of the initial pole piece to obtain the electrode pole piece.

The invention discloses a preparation method of a high-hardness and low-roughness micro-arc oxidation film of an annular aluminum part, relates to the technical field of surface treatment, and aims to solve the technical problems that the thicknesses of film layers on the inner surface and the outer surface of the annular aluminum part subjected to existing micro-arc oxidation treatment are not uniform, and the formed micro-arc oxidation film is low in hardness and too large in roughness. The preparation method of the micro-arc oxidation film comprises the steps that after an annular aluminum piece is sequentially immersed in a first solution and a second solution, the annular aluminum piece is taken out and dried, and the micro-arc oxidation film is formed on the surface of the annular aluminum piece; wherein the first solution comprises phosphate, silicate, EDTA (Ethylene Diamine Tetraacetic Acid) salt, hydroxide and tartrate; the second solution comprises hexametaphosphate, silicate, villiaumite, EDTA (Ethylene Diamine Tetraacetic Acid) salt, hydroxide and citrate. According to the technical scheme, the preparation method of the high-hardness and low-roughness micro-arc oxidation film of the annular aluminum part and the micro-arc oxidation film prepared through the preparation method are provided.

The utility model discloses television backboard curved surface film pasting equipment, and relates to the field of television backboard film pasting equipment. The television back plate cleaning device comprises a frame body, the top of the frame body is provided with a conveying belt, a television back plate is arranged above the conveying belt, and the top of the conveying belt is detachably connected with a cleaning mechanism through a quick release mechanism. The cleaning mechanism is arranged on the base so as to adapt to different television backboards, the exhaust hood is located at the core position of the cleaning mechanism, dust and impurities near the television backboards can be effectively extracted through strong suction force generated by the rotating rod driven by the motor and the exhaust fan blades, and the dust collection cotton is located at the rear ends of the exhaust fan blades and used for capturing and filtering the sucked dust and impurities. The drawing plate is clamped with the exhaust hood, so that the dust collection cotton is conveniently and regularly cleaned and replaced, and the cleanness and the performance of the equipment are maintained.

The invention discloses a calculation method and a calculation device for a film state boiling starting point of a surface with dirt, and belongs to the field of nuclear power. The calculation method for the membrane state boiling starting point of the surface with the dirt comprises the following steps: establishing a fuel rod cladding surface heat exchange model with the dirt according to a fuel rod cladding model with the dirt and thermal parameters, and calculating to obtain a heat conductivity coefficient and permeability of a dirt area; calculating the gas film thickness at the beginning of film boiling; according to the pressure balance and energy conservation equation, the heat flux corresponding to the minimum gas film thickness value is obtained through calculation and serves as the initial heat flux of film boiling. The method can accurately calculate the initial heat flux density of membrane boiling under the influence of dirt, and improves the precision of systematically analyzing the influence of dirt on the thermal hydraulic performance of a reactor.

The invention relates to the technical field of fireproof glass, in particular to a nano composite material coating and a preparation method for applying the nano composite material coating to a surface film layer of an initial substrate for single-piece non-heat-insulation fireproof glass. The nano composite material coating is prepared from the following raw materials in parts by weight: 50-80 parts of nano composite oxide, 10-15 parts of a toughening material, 15-30 parts of molten glass and 1-5 parts of a fluxing agent; the preparation method comprises the following steps: S1, by taking a fluxing agent as a medium, mixing a nano composite oxide and a toughening material, grinding for 1-2 hours, adding a glass melt into the mixture, continuously grinding for 2-3 hours, heating to 180-220 DEG C, carrying out heat treatment, and removing the fluxing agent, so as to obtain a nano composite material; and S2, depositing on the surface of the glass substrate by adopting a physical vapor deposition method or a chemical vapor deposition method to form the nano composite material coating. According to the nano composite material coating prepared by the method, the toughness and the impact strength of the glass are improved, the fire-resistant integrity time of the glass is prolonged, and meanwhile, the light transmittance and the ultraviolet radiation resistance of the glass are better.

The invention relates to a preparation method of a solar cell, the solar cell and a photovoltaic module, and belongs to the field of photovoltaic technology, and the preparation method of the solar cell comprises the steps: providing a substrate, the first surface of the substrate is provided with a pyramid structure, a doped conductive region is formed on the first surface, and a silica glass layer is formed on the side, away from the first surface, of the doped conductive region; laser processing is carried out on the first area part of the first surface, so that a low-concentration doped area is formed in the substrate, meanwhile, at least part of the silica glass layer located at the spire part of the pyramid structure in the first area is broken to form a notch, wet etching is carried out on the first surface side, and the notch can accelerate the rate of subsequent etching of the surface film layer of the first area; therefore, the efficiency of preparing the solar cell is improved.

The invention discloses a paper-based molded coffee capsule capable of being naturally composted, a PHA aqueous dispersion in-situ film forming barrier heat-sealing composite layer, a preparation method and application thereof, and belongs to the field of degradable packaging and single-cup extraction capsules. The capsule body is formed by molding paper pulp and is provided with a side wall, a bottom wall and a mouth flange; the biodegradable polyester-based film sealing component is connected to the flange in a sealing manner; and the polyhydroxyalkanoate barrier heat-sealing composite layer covers the inner surface of the body and the sealing surface of the flange. The composite layer is obtained by in-situ film forming of a particle size gradient double-layer aqueous dispersion and comprises a permeation anchoring layer located in paper pulp pores and a continuous compact layer located on the outer side in the thickness direction. The flange is a hot-pressing densified area, and a local thickening heat sealing ring is formed on the sealing face of the flange. Through physical anchoring of the small-particle-size components and surface film forming of the large-particle-size components, the moisture and oxygen blocking and interface bonding performance is achieved, and the brewing sealing performance is guaranteed.