804results about "Electrically-conducting adhesives" patented technology

The invention relates to the technical field of conductive glue, in particular to polyurethane modified silicone rubber, sprayable conductive glue and a preparation method thereof. The polyurethane modified silicone rubber is prepared from the following components in parts by weight: 50 to 150 parts of vinyl silicone oil, 20 to 50 parts of polyurethane powder and 5 to 15 parts of compatilizer, the sprayable conductive glue comprises the following components in parts by weight: 20-40 parts of conductive particles, 5-15 parts of hydrogen-containing silicone oil, 50-150 parts of polyurethane modified silicone rubber, 1-10 parts of a coupling agent, 1-5 parts of a catalyst, 1-2 parts of an inhibitor, 40-90 parts of a diluent and 1-2 parts of a defoaming agent, compared with traditional silicone rubber, the polyurethane modified silicone rubber provided by the invention is high in mechanical strength and not easy to tear, when the polyurethane modified silicone rubber provided by the invention is used for preparing sprayable conductive glue, a conductive layer formed by the conductive glue is excellent in conductivity, and meanwhile, the mechanical property is also remarkably improved.

The invention belongs to the technical field of conductive adhesives, and particularly relates to a salt-fog-resistant waterborne conductive adhesive and a preparation method thereof.The salt-fog-resistant waterborne conductive adhesive is mainly prepared from, by weight, 5-10 parts of salt-fog-resistant waterborne polyurethane; 5 to 10 parts of water-based tackifying resin; 30 to 50 parts of conductive silver powder; 10 to 20 parts of ethanol; 2-10 parts of an anti-hydrolysis agent; and 10-30 parts of deionized water. According to the salt-fog-resistant aqueous conductive adhesive, polyurethane resin with polytetrahydrofuran alcohol and polycaprolactone polyol as main structures is used as matrix resin, a system is endowed with excellent water resistance and salt-fog resistance, the salt-fog-resistant aqueous conductive adhesive shows outstanding hydrolysis-resistant stability after being cured, and the salt-fog-resistant aqueous conductive adhesive and the conductive silver powder have a synergistic effect, so that the anti-settling performance is effectively improved.

The invention discloses a high-toughness conductive and thermal-conductive epoxy adhesive, a preparation method thereof and a conductive film, and belongs to the technical field of conductive materials. Comprising the following raw material components in parts by weight: 100 parts of epoxy resin, 4-25 parts of a latent curing agent, 0.5-5 parts of an accelerant, 200-600 parts of conductive filler, 5-15 parts of an epoxy-terminated polyurethane flexibilizer, 5-20 parts of a core-shell flexibilizer, 5-10 parts of a nitrile rubber flexibilizer, 2-10 parts of a reactive diluent, 0.5-2 parts of a coupling agent and 20-50 parts of a solvent. Through compounding of the over-end epoxy type polyurethane flexibilizer, the core-shell flexibilizer and the nitrile rubber flexibilizer, the prepared conductive adhesive has excellent toughness and bonding characteristics, and meanwhile, the shrinkage stress and thermal stress in the curing process can be reduced.

The application belongs to the technical field of conductive glue, and particularly relates to a conductive glue, a preparation method and application thereof, wherein the conductive glue is made of the following raw materials in parts by weight: 40-60 parts of synthetic acrylic resin, 5-15 parts of epoxy resin, 25-45 parts of conductive filler, 5-15 parts of latent curing aid, 80-120 parts of diluent and 5-8 parts of auxiliary agent. By adding the latent curing aid, the application can reduce the potential possibility of the reaction of the acrylic resin and the epoxy resin at room temperature, thereby improving the storage effect of the conductive glue, improving the overall performance of the electronic product and meeting different application scenarios with different requirements. The preparation method directly mixes the raw materials such as the acrylic resin, the epoxy resin, the conductive filler, the auxiliary agent, the diluent and the latent curing aid uniformly in the preparation process without the need of separation and storage, thereby reducing the production cost, simplifying the use process of the user, improving the production efficiency of the conductive glue and the product quality.

The invention belongs to the technical field of conductive microsphere preparation, and particularly relates to a surface-roughened nickel-plated conductive microsphere and a preparation method and application thereof. The preparation method comprises the following steps: carrying out pretreatment to enable the surfaces of the polymer microspheres to contain nickel ions, reducing the nickel ions into nickel nanoparticles, activating the microspheres and carrying out chemical plating. According to the invention, the specific surface area of the conductive microspheres is increased by reducing the nickel nanoparticles on the surfaces of the microspheres, a large amount of impurities cannot be generated among the microspheres, and adhesion among the microspheres can be effectively prevented. According to the prepared conductive microspheres, the plating layer and the polystyrene microspheres are firmly combined, and the risk that the conductivity is reduced due to the fact that the surface of the plating layer falls off is reduced. The preparation method is safe, environment-friendly, simple, convenient and suitable for industrial production requirements.

The application provides a kind of fast curing acrylic glue and application, the fast curing acrylic glue is prepared from the following components according to weight parts: butyl nitrile rubber of terminal methacrylate is 13-17 parts;Polyurethane acrylate is 5-8 parts;Monofunctional acrylate monomer is 14-20 parts;Two functionality acrylate monomer is 7-13 parts;Three functionality acrylate monomer is 1-3 parts;Peroxide is 0.5-1.5 parts;Polymerization inhibitor is 0.01-0.04 parts;Coupling agent is 0.5-0.7 parts.The acrylic glue provided by the application has the advantages of fast curing, low volume resistivity after adding silver powder curing, good bonding strength, moderate elastic modulus, and can be used for photovoltaic tile conductive silver glue.

The invention discloses a high-performance conductive adhesive doped with conductive nanoparticles, and belongs to the technical field of conductive adhesives. The high-performance conductive adhesive provided by the invention is prepared from the following raw materials in parts by weight: 50 to 100 parts of vinyl liquid silicone rubber, 100 to 400 parts of modified silver coated copper powder, 1 to 10 parts of nano silver powder I, 1 to 10 parts of epoxy silane modified prepolymer, 3 to 30 parts of hydrogen-containing silicone oil, 0.1 to 5 parts of platinum catalyst and 0.05 to 1 part of inhibitor. The silver-coated copper powder and the epoxy silane are modified, so that the conductivity and the binding power of the conductive adhesive are greatly improved, and the epoxy silane modified prepolymer can form strong covalent bond combination with the surface of an adhered object through a high-density epoxy group of the epoxy silane modified prepolymer; the nano-silver bulges on the surface of the modified silver coated copper powder increase the effective contact area and the number of contact points among the conductive filler particles, so that the conductive adhesive has the characteristics of high conductivity, low resistance, high adhesive strength and strong toughness.

The invention provides a composite photo-initiation system electronic adhesive as well as a preparation method and application thereof, and relates to the technical field of anisotropic conductive adhesive films. The adhesive comprises a thermoplastic resin solution, an acrylate monomer, epoxy resin, a polyfunctional oligomer solution containing a carbon-carbon double bond and an epoxy group, an insulating inorganic filler, conductive particles and a composite photoinitiator solution, wherein the composite photoinitiator is composed of a free radical photoinitiator and a cationic photoinitiator, and acrylate free radical chain polymerization and epoxy resin cationic ring opening polymerization are synchronously triggered through ultraviolet light; and the polyfunctional oligomer is used as a molecular bridge to bond the two-phase curing network to form an interpenetrating cross-linked structure. The electronic adhesive provided by the invention realizes low-temperature rapid curing for 1-15 seconds, the curing shrinkage rate is reduced to below 1%, the reliability defect caused by oxygen inhibition, high shrinkage rate and phase separation of a traditional single system is solved, and the electronic adhesive is suitable for low-temperature efficient packaging of high-precision electronic components.

The invention discloses a flexible hydrogel neural electrode and a preparation method and application thereof. The flexible hydrogel neural electrode comprises a flexible substrate layer, an electrode layer and a packaging layer which are sequentially arranged in a stacked mode, the flexible substrate layer and the packaging layer are each of a hydrogel fiber composite film structure formed by compounding a fiber film and hydrogel, and the fiber film is embedded in the hydrogel; the fiber film is a polycaprolactam fiber film, and the hydrogel is polyvinyl alcohol hydrogel; the electrode layer comprises a plurality of metal electrodes, and each metal electrode is provided with an electrode point and a bonding pad; the packaging layer is provided with a plurality of hole structures, and the holes are arranged corresponding to the electrode points and the bonding pads and enable the electrode points and the bonding pads to be exposed. The flexible hydrogel neural electrode provided by the invention has good biocompatibility, swelling resistance and process compatibility; meanwhile, the flexible hydrogel neural electrode can be stably applied to an implantable brain-computer interface and is used for realizing long-term stable acquisition and transmission of neural signals.

A conductive epoxy composition is disclosed comprising an epoxy resin, a low-viscosity hydrocarbon diluent, silver, and graphene. The one-part formulation provides enhanced electrical conductivity, mechanical strength, and process stability. The epoxy resin may include resorcinol diglycidyl ether, diglycidyl ether of Bisphenol A, or Bisphenol F. The hydrocarbon diluent may include glycidyl-ether-family resins having defined carbon-chain characteristics and molecular weights. Silver may be present in particulate, flake, nanoparticle, or coated forms at about 55-90 wt. %, while graphene may be present at 0.03-0.3 wt. % with dimensions of 1-10 μm and surface areas of 400-2,000 m2 / g. Optional additives include solvents, ionic liquids, latent curing agents, and strength enhancers to optimize curing and adhesion.

The embodiment of the invention provides a self-powered microneedle patch for repairing hypertrophic scars as well as a preparation method and application of the self-powered microneedle patch. The self-powered microneedle patch comprises: a friction nano-generator for generating a current; the conductive drug-loaded microneedle patch is connected with the friction nano-generator, and the friction nano-generator is connected with the conductive drug-loaded microneedle patch; the conductive drug-loaded microneedle patch comprises a conductive microneedle patch body and a crosslinked gelatin-crosslinked hyaluronic acid microneedle bearing Sb4. The surface of the conductive micro-needle patch is provided with a metal coating, and the conductive micro-needle patch is used for mediating current generated by the friction nano-generator and applying percutaneous electrical stimulation; the cross-linked gelatin-cross-linked hyaluronic acid microneedle is coated at the tip of the conductive microneedle patch. According to the self-powered microneedle patch provided by the embodiment of the invention, myofibroblasts of hypertrophic scars are transdifferentiated into adipocytes by providing percutaneous electrochemical stimulation, inflammatory factor release is inhibited, and a tissue microenvironment is remodeled, so that the hypertrophic scars are reversed, and skin repair and tissue regeneration are realized.

The invention provides a natural protein-based multifunctional biogel and a preparation method and application thereof, and the preparation method comprises the following steps: dissolving gelatin in water to prepare a gelatin solution, cooling and curing to obtain a gel precursor; soaking the gel precursor in water for swelling, and then placing the gel precursor in a first deep eutectic solvent for solvent exchange to obtain gel; the content of gelatin in the gelatin solution is 5-40 wt%; the swelling time in water is greater than or equal to 5 minutes; the preparation method of the gel also comprises the following steps: pretreating degummed silk to obtain silk nanofibers, and dispersing the silk nanofibers in a dispersion solvent to form a dispersion liquid; mixing and stirring gelatin and the dispersion liquid, cooling and curing, and performing swelling-assisted solvent exchange to obtain the gel. The preparation method is green, and the prepared gel is excellent in mechanical property, has electrical conductivity, long-term environmental stability, adhesion, self-healing property and degradability, and can be widely applied to the field of flexible electronics or biomedicine.

The invention discloses a magnetic control soft robot with electrical stimulation and drug release functions, and relates to the technical field of medical instruments. In the magnetic control soft robot provided by the invention, the magnetic layer is used for driving the body to move and position in the gastrointestinal tract under the driving of an external magnetic field; the electric control layer is used for supplying power and is responsible for controlling the opportunity and parameters of electric stimulation and controlling a drug release instruction; after a microneedle of the conductive hydrogel microneedle layer penetrates into tissue, nerve endings or muscle cells can be stimulated by applying a weak electric signal so as to regulate gastrointestinal motility, relieve pain and the like, a drug can be loaded in the microneedle, and when the electric signal is applied, the drug can be loaded in the microneedle by means of electromigration, electroosmosis and the like. Triggering the drug to be controllably released into the target tissue as required; the adhesive layer is used for temporarily anchoring the robot at a specific working position of the gastrointestinal tract; according to the magnetic control soft robot and the preparation method thereof, the comprehensive requirements of gastrointestinal tract disease treatment can be met.

An electroconductive pressure-sensitive adhesive tape includes at least an electroconductive pressure-sensitive adhesive layer containing at least a rubber component and electroconductive particles. The rubber component contains a polyisobutylene (A) having a viscosity average molecular weight of 400,000 or more and 800,000 or less and a polyisobutylene (B) having a viscosity average molecular weight of 100,000 or less. The electroconductive pressure-sensitive adhesive tape achieves both a superior adhesive property and a high swelling resistance to an electrolyte layer, especially, a high swelling resistance to an electrolyte layer containing dimethyl carbonate.

The invention provides a rigidity-flexibility variable multifunctional optical genetic implantable probe and a preparation method thereof. The probe comprises a thin film electrode layer and a rigidity-flexibility variable shape memory layer arranged at the bottom of the thin film electrode layer. The micro LED is integrated in the flexible nerve probe through contact type laser transfer printing to serve as a light stimulation light source, the preparation success rate is remarkably increased, heat radiated outwards during light stimulation is reduced, and damage to brain tissue of the brain caused by high-Young-modulus optical fibers is avoided; meanwhile, a rigid-flexible variable shape memory layer is also integrated, so that the Young modulus of the probe is high when the in-vitro temperature is relatively low, fixed-point implantation can be directly carried out without an auxiliary tool, the Young modulus of the probe is reduced along with the rise of the body temperature after the probe is implanted into the body, and the probe finally adapts to the mechanical tissue strength of the brain; therefore, the implantation efficiency and the mechanical adaptability of the probe to brain tissues are improved, and micron-scale accurate implantation of the probe, neuron-scale positioning of electrical stimulation and light stimulation points and long-term stable recording of electrophysiological signals are realized.

A thermosetting adhesive film for circuit connection according to the present invention contains solder particles having an average particle diameter of 1-30 μm with the particle diameter having a CV value of 20% or less. A ratio of the thickness of the adhesive film for circuit connection to the average particle diameter of the solder particles is more than 1.0 and less than 1.5. Assuming that the solder particles have a melting point of Tm°C, the curing rate at Tm°C is 80% or more when heating is performed at a rate of temperature rise of 10°C / minute under a nitrogen atmosphere.

The invention relates to the technical field of conductive adhesives, in particular to a conductive hydrogel adhesive with a temperature phase change characteristic for fixing a skin electrode, and the conductive hydrogel adhesive comprises the following components in parts by weight: 5-20 parts of a structural component; the gel is selected from at least one of gelatin, collagen, agar, chitosan, sodium alginate, gellan gum, methyl cellulose and xanthan gum; 1-5 parts of a conductive substance; 5-10 parts of a water retention component; and 50-70 parts of water. The prepared adhesive has excellent adhesive performance and conductivity, the material cost is low, the adhesive is green and environmentally friendly, the use method is simple and convenient, and optimal use of most electrodes in the market can be promoted.

The invention belongs to the field of photovoltaic technology, and provides a multifunctional photovoltaic packaging adhesive film, a preparation method thereof and a photovoltaic module monitoring system. The multifunctional photovoltaic packaging adhesive film is of a co-extruded multi-layer composite structure and comprises a functional layer, a barrier layer and a base layer which are sequentially stacked, the functional layer comprises the following raw material components: a polyolefin matrix, a light conversion agent, a self-repairing microcapsule, a stress luminescent material, optical waveguide fibers and other auxiliaries which are matched according to a specific mass ratio; the barrier layer is a transparent conductive layer and comprises the following raw material components: a polyolefin matrix and a conductive material which are matched according to a specific mass ratio; the base layer comprises the following raw material components: a polyolefin matrix, an anti-PID auxiliary agent and other auxiliary agents which are matched according to a specific mass ratio. Through cooperation of all the layers, the multifunctional photovoltaic packaging adhesive film which integrates light conversion energy, power generation power gain, self-repairing (service life prolonging), PID resistance improvement, power attenuation reduction after PID aging, damage state sensing and visualization and other functions can be obtained.

The present invention relates to the technical field of adhesive materials, and specifically relates to a reusable high shear strength electrical debonding tape, and a preparation method. The tape is prepared using acrylate or olefin monomers, a methoxy polyethylene glycol-containing ester, acrylic acid, salts, functional monomers, an organic solvent, and a tackifying resin. In the electrical debonding tape of the present invention, most electrolytes are bonded to a main adhesive molecular chain through chemical bonds, and some electrolytes are dissociated and complexed by the strong ether-oxygen bonds of methoxy polyethylene glycol, rather than simple physical mixing as in the prior art, thus effectively preventing large-scale precipitation of electrolytes under electrified conditions, and enabling reuse.

The invention belongs to the technical field of conductive adhesive films, and particularly relates to an ACF adhesive film based on modified PVB resin, an ACF bonding assembly and a preparation method of the ACF adhesive film. The preparation method comprises the following steps: firstly, adding PVB (Polyvinyl Butyral) resin and a compound containing an active reaction group into an organic solvent, and adding nano reinforced particles to prepare composite modified PVB resin; and mixing the composite modified PVB resin with epoxy resin, a cationic initiator, a flexibilizer and conductive particles, and coating to prepare a film, thereby obtaining the anisotropic conductive film ACF. According to the preparation method, the PVB resin is specifically modified and the preparation process is optimized, so that the ACF adhesive film can efficiently and stably capture the conductive particles, the fixing effect of the conductive particles in the adhesive film is improved, and the conductivity and reliability of the ACF adhesive film are further improved.

The invention discloses preparation of a polymer conductive binder and application of the polymer conductive binder in a lithium ion battery, and belongs to the field of lithium ion batteries. A main chain of the high-molecular conductive binder is of a conjugated structure, and a side chain or the main chain contains functional groups such as lithium phenolate, lithium carboxylate, furanone and lactone; the preparation method comprises the following steps: carrying out heat treatment on a specific polymeric monomer and an initiator in an inert atmosphere and a solvent in the presence of a lithium source, and carrying out post-treatment to obtain a target product. The polymer conductive binder can effectively fill pores of active substances, buffer volume expansion and prevent the active substances from falling off. The polymer conductive binder has higher intrinsic conductivity (greater than or equal to 102S / cm), stronger electrode bonding strength (greater than or equal to 1.5 N / cm) and considerable lithium ion storage capacity (specific capacity greater than or equal to 200mAh / g), can remarkably improve the capacity and cycling stability of the battery, and has a wide market application prospect.

Disclosed is a film-like adhesive. The film-like adhesive contains metal particles, a thermosetting resin, a setting agent, and an elastomer. The average diameter (D50) of the metal particles is 1.0-2.5 μm. A manufacturing method for the film-like adhesive is also disclosed. The manufacturing method for the film-like adhesive comprises a step for preparing an adhesive varnish by mixing a starting material varnish containing metal particles, a thermosetting resin, a setting agent, an elastomer, and an organic solvent at a mixing temperature of 50°C or higher, and a step for using the adhesive varnish to form a film-like adhesive.

The invention is suitable for the technical field of conductive films, and provides an anti-tilting high-reliability anisotropic conductive film and a preparation method thereof. The anisotropic conductive film is prepared from the following raw materials in parts by weight: 30 to 60 parts of polyurethane acrylic resin, 5 to 20 parts of non-acrylic functional polyurethane, 3 to 12 parts of XNBR, 2 to 12 parts of IBOA, 3 to 12 parts of M215, 1 to 6 parts of M340, 0.5 to 5 parts of phosphate, 0.2 to 3 parts of TiO2, 0.7 to 5 parts of organic peroxide initiator, 0.2 to 5 parts of modified nano silicon dioxide A and 2 to 28 parts of modified nano silicon dioxide B. According to the invention, modification treatment is carried out on two different kinds of nano silicon dioxide, so that the problems of tilting and bubbles in a COF terminal gap region in a crimping process are solved, synergistic improvement of low contact resistance and high tension is also realized, and the reliability, process tolerance and long-term use stability of the conductive film are remarkably enhanced.

The invention relates to the technical field of powder surface modification and functional modification, in particular to surface-treated silver-containing conductive powder and a preparation method and application thereof.The preparation method comprises the steps that an alcohol solvent, water, a silane coupling agent and an organic acid catalyst are mixed, obtained hydrolysate is mixed with the silver-containing conductive powder, and modified conductive powder is obtained; and mixing stearic acid with an organic solvent, and mixing the obtained coating liquid with the modified conductive powder to obtain the surface-treated silver-containing conductive powder. Different kinds of silane coupling agents are combined on the surface of the silver-containing conductive powder in a chemical bond mode through wet modification so as to adapt to different base material systems; stearic acid is secondarily coated on the surface of the modified conductive powder, so that the dispersity of the silver-containing conductive powder in each system is greatly improved, and the agglomeration of the silver-containing conductive powder is reduced; and moreover, through the treatment method and process, powder agglomeration caused by capillary action is reduced, so that surface treatment of the silver-containing conductive powder from submicron to micron is realized.

A primer composition includes a solvent, a conductive filler dispersed in the solvent, and a polymer in at least one state dissolved or dispersed in the solvent. The polymer includes at least one of polyurethane, polyacrylate, polyamide, or rubber. An adhesive system comprises an electrically conductive composition and an electrodebonding adhesive comprising an ionic liquid. The use of the primer composition as a primer on a non-conductive substrate in combination with an electrodebonding adhesive is also described. A method of making a bonded article and an article bonded with the adhesive system disclosed herein and / or made by the method disclosed herein are also described.

The invention discloses a microneedle electrical stimulation carrier and a preparation method and application thereof. The microneedle electrical stimulation carrier is prepared by compounding polyvinylpyrrolidone, polyaniline and polydimethylsiloxane, and the specific process comprises the following steps: mixing and dissolving polyvinylpyrrolidone and deionized water according to a specific ratio, adding aniline and ferric trichloride, stirring and dialyzing to obtain a mixed solution; and pouring the solution into a microneedle mold, drying to form a film, implanting a silver wire, covering with a polydimethylsiloxane solution, and drying again to form a complete microneedle electrical stimulation carrier. By optimizing the proportion of all the components, particularly controlling the mass ratio of polyvinylpyrrolidone to deionized water to be 1: 15 and the mass ratio of aniline to a polyvinylpyrrolidone solution to be 1: 30, the prepared microneedle carrier has good flexibility, moderate solution viscosity, excellent conductivity and reliable structural integrity; accurate and minimally invasive cranial nerve electrical stimulation can be realized, and the method is suitable for the field of cranial nerve treatment and regulation.

The invention belongs to the technical field of solar cells, and discloses a flexible silicon substrate-indium phosphide solar cell and a preparation method thereof. The flexible silicon-based indium phosphide solar cell comprises a lower electrode, a flexible silicon solar cell, a first transparent conductive layer, a conductive adhesive, a second transparent conductive layer and an indium phosphide solar cell which are sequentially stacked from bottom to top, an antireflection film layer and an upper electrode are arranged on the indium phosphide solar cell; the conductive adhesive is obtained by dispersing polymethyl methacrylate microspheres coated with metal on the surface into an EVA solution. Heterogeneous integration is achieved through the transparent conductive adhesive, the two-end laminated cell is formed, the device is light, thin and flexible, the defects that a traditional four-end laminated cell is rigid, heavy, large in optical loss and the like are overcome, and the solar cell has good performance.

The utility model provides a conductive adhesive, a battery monomer, a battery and a power utilization device, and belongs to the technical field of batteries. The conductive adhesive comprises a substrate layer and a conductive layer. The conductive layer is located on at least one side of the substrate layer, and the conductive layer and the substrate layer are arranged in a stacked mode. The conductive layer comprises an adhesive and a conductive agent, and the conductive agent is dispersed in the adhesive. The substrate layer has a plurality of through holes, and the conductive layer covers the through holes.

This invention provides an antistatic and privacy-protecting polarizing film and its preparation process, belonging to the field of polarizing film preparation technology. The preparation process includes the following steps: preparation of an antistatic agent; preparation of a modified adhesive; preparation of a composite polarizing film; and preparation of the polarizing film. This invention introduces an antistatic agent and POSS-modified graphene oxide into the modified adhesive, making the adhesive layer a conductive medium connecting multiple layers such as the polarizing film (PVA), TAC layer, and privacy film, forming a cross-layer conductive path. This avoids static electricity accumulation at the interface, improving the antistatic effect. Boric acid is first used to crosslink the PVA film, followed by glyoxal crosslinking, achieving long-term reliability of the polarizing film under high temperature and high humidity environments.

To provide an adhesive film that can prevent a micro piece from being bent and a method for manufacturing adhesive film.SOLUTION: An adhesive film 1 is provided with a release film 2, and an adhesive layer 3 laminated on one surface 2a side of the release film 2. The adhesive layer 3 comprises a body portion 3A, and a strip-shaped micro piece 3B protruding from the body portion 3A in an in-plane direction of the release film 2. On the other surface 2b side of the release film 2, a support film 5 is laminated on a region overlapping with at least a part of the micro piece 3B.SELECTED DRAWING: Figure 1