Cover tape for packaging electronic components and packaging body

Abstract

To provide an electronic component packaging cover tape that can keep a haze value excellently, and can prevent blocking.SOLUTION: Provided is an electronic component packaging cover tape 1 including: a base material layer 2; a heat seal layer 3 arranged on one surface side of the base material layer; and an anti-static layer 4 arranged on a surface side opposite to the surface of the base material layer on the heat seal layer side. The anti-static layer has an anti-static agent, a lubricant, and a binder resin. The lubricant is an ethylene oxide-based nonionic surfactant having an HLB value of 2 or more and 11 or less. The binder resin is an acrylic binder resin or an epoxy-based binder resin.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a cover tape for packaging electronic components and a package using the same. [Background technology]

[0002] In recent years, electronic components such as ICs, resistors, transistors, diodes, capacitors, and piezoelectric resistors have been packaged in tape for surface mounting. In tape packaging, electronic components are housed in a carrier tape with multiple compartments for housing the components, and then the carrier tape is heat-sealed with a cover tape to obtain a package for storing and transporting the electronic components. When mounting the electronic components, the cover tape is peeled off the carrier tape, and the electronic components are automatically removed and surface-mounted on a board. The cover tape is also called top tape.

[0003] When the tape package is unopened, the electronic components contained therein are inspected visually or mechanically through the cover tape, so the cover tape must have excellent visibility.

[0004] Furthermore, before heat sealing to the carrier tape, the cover tape is usually stored and transported in a wound state to save space and reduce replacement work. During this process, adhesion (blocking) may occur between tapes. For the purpose of suppressing blocking, for example, Patent Document 1 discloses a cover tape having an antistatic layer containing an inorganic antistatic agent and wax with an average particle size of 0.2 to 3.0 μm. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6113073 Summary of the Invention [Problem to be solved by the invention]

[0006] The antistatic layer in Patent Document 1 suppresses blocking by uniformly dispersing wax in the form of fine particles. However, adding particles can sometimes cause a decrease in transparency, and the particles can also cause wear on the taping machine jig when they come into direct contact with it. Furthermore, because the antistatic layer is thin, only small particles can be filled in, which means that the blocking suppression effect is insufficient.

[0007] Furthermore, antistatic layers containing binder resins have poor slip properties and are prone to blocking due to their low surface roughness and good flatness. Among these, acrylic binder resins and epoxy binder resins are particularly prone to blocking. This problem is particularly exacerbated when inorganic or organic particles are used as antistatic agents. One approach to suppress blocking is to add a surfactant to the antistatic layer as a lubricant, but this may result in insufficient suppression of blocking or a deterioration in the haze value.

[0008] The present disclosure has been made in consideration of the above circumstances, and aims to provide a cover tape for packaging electronic components that can maintain a good haze value and suppress blocking. [Means for solving the problem]

[0009] One embodiment of the present disclosure is a cover tape for packaging electronic components, comprising: a base layer; a heat seal layer disposed on one side of the base layer; and an antistatic layer disposed on the side of the base layer opposite the side on which the heat seal layer is disposed, the antistatic layer comprising an antistatic agent, a lubricant, and a binder resin, the lubricant being an ethylene oxide-based nonionic surfactant having an HLB value of 2 or more and 11 or less, and the binder resin being an acrylic binder resin or an epoxy binder resin.

[0010] One embodiment of the present disclosure is a packaging body comprising a carrier tape having a plurality of storage sections for storing electronic components, the electronic components stored in the storage sections, and the above-mentioned cover tape for packaging electronic components arranged to cover the storage sections. [Effects of the Invention]

[0011] The present disclosure has an effect of providing a cover tape for packaging electronic components that can maintain a good haze value and suppress blocking. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a schematic cross-sectional view illustrating a cover tape for packaging electronic components according to the present disclosure. [Figure 2] 1A and 1B are schematic plan and cross-sectional views illustrating a packaging body of the present disclosure. [Figure 3] 1 is a schematic cross-sectional view illustrating a cover tape for packaging electronic components according to the present disclosure. [Figure 4] FIG. 1 is a diagram illustrating a method for evaluating blocking in an example. DETAILED DESCRIPTION OF THE INVENTION

[0013] Embodiments of the present disclosure will be described below with reference to the drawings and the like. However, the present disclosure can be implemented in many different forms, and should not be construed as being limited to the description of the embodiments exemplified below. Furthermore, to clarify the explanation, the drawings may schematically depict the width, thickness, shape, etc. of each part compared to the actual form, but these are merely examples and are not intended to limit the interpretation of the present disclosure. Furthermore, in this specification and each drawing, elements similar to those previously described with reference to the preceding drawings will be designated by the same reference numerals, and detailed descriptions may be omitted as appropriate.

[0014] In this specification, when describing a mode in which another component is placed on a certain component, the terms "above" or "below" are used, unless otherwise specified, to include both a case in which another component is placed directly above or below a certain component so as to be in contact with the component, and a case in which another component is placed above or below a certain component with another component interposed therebetween. Also, in this specification, when describing a mode in which another component is placed on the surface of a certain component, the terms "on the surface side" or "on the surface" are used, unless otherwise specified, to include both a case in which another component is placed directly above or below a certain component so as to be in contact with the component, and a case in which another component is placed above or below a certain component with another component interposed therebetween.

[0015] The cover tape for packaging electronic components and the package according to the present disclosure will be described in detail below. Note that in this specification, the "cover tape for packaging electronic components" may be simply referred to as the "cover tape."

[0016] A. Cover tape for packaging electronic components As a result of extensive research, the present inventors have found that the above-mentioned problems can be solved by using an ethylene oxide-based nonionic surfactant having an HLB value within a specific range as a lubricant in the antistatic layer, and have thus completed the present invention.

[0017] The reason why the use of an ethylene oxide-based nonionic surfactant having an HLB value within such a specific range is effective is presumed to be as follows. In other words, it is generally assumed that the lower the HLB value, the better the compatibility with the binder resin. Here, if the compatibility with the binder resin is too good, the lubricant will dissolve (disperse) well in the binder resin in the antistatic layer, and the amount that bleeds onto the surface of the antistatic layer will be extremely small. On the other hand, if the compatibility with the binder resin is poor, the dispersion in the binder resin will be poor, which may increase the haze value of the antistatic layer.

[0018] In the present disclosure, by using an ethylene oxide-based nonionic surfactant having an HLB value equal to or greater than a specific value as a lubricant, the compatibility with the binder resin is not excessively improved, and the lubricant is likely to be localized on the surface of the antistatic layer, which is presumably why a sufficient blocking suppression effect is achieved.

[0019] Furthermore, it is believed that the use of an ethylene oxide-based nonionic surfactant with an HLB value below a specific value improves the compatibility of the lubricant with the binder resin, thereby maintaining a good haze value. Furthermore, it is believed that the use of an ethylene oxide-based nonionic surfactant with an HLB value below a specific value reduces the ability to attract moisture, thereby preventing water-mediated blocking between tapes.

[0020] The cover tape of the present disclosure will be described below with reference to the drawings. Fig. 1 is a schematic cross-sectional view showing an example of a cover tape according to the present disclosure. As shown in Fig. 1, the cover tape 1 according to the present disclosure has a base layer 2, a heat seal layer 3 disposed on one side of the base layer 2, and an antistatic layer 4 disposed on the side of the base layer 2 opposite the side on which the heat seal layer 3 is disposed. Furthermore, as shown in Fig. 3, the cover tape according to the present disclosure may have an intermediate layer 5 between the base layer 2 and the heat seal layer 3. The cover tape 1 according to the present disclosure is characterized in that the antistatic layer 4 contains, in addition to an antistatic agent, an ethylene oxide-based nonionic surfactant having an HLB value within a specific range as a lubricant, and further contains an acrylic binder resin or an epoxy binder resin as a binder resin.

[0021] 2(a) and 2(b) are a schematic plan view and a cross-sectional view showing an example of a package using the cover tape for packaging electronic components according to the present disclosure, and FIG. 2(b) is a cross-sectional view taken along line AA in FIG. 2(a). As shown in FIGS. 2(a) and 2(b), the package 10 includes a carrier tape 11 having multiple storage compartments 12 for storing electronic components 13, the electronic components 13 stored in the storage compartments 12, and a cover tape 1 arranged to cover the storage compartments 12. The cover tape 1 is heat-sealed to the carrier tape 11, and a heat-sealed portion 3h is provided in a linear shape with a predetermined width on both ends of the heat-seal layer 3 of the cover tape 1. Furthermore, in the package 10, the carrier tape 11 may have feed holes 14.

[0022] I. Antistatic layer The antistatic layer in the present disclosure includes an antistatic agent, a lubricant, and a binder resin. The antistatic layer is a layer for preventing the cover tape from being charged. The presence of the antistatic layer can suppress chip damage and mounting defects due to static electricity caused by peeling charge when the cover tape is peeled off from the carrier tape, prevent static electricity from being generated by contact with other surfaces, and prevent dirt, dust, and the like from adhering to the surface of the cover tape due to static electricity.

[0023] (a) Lubricant In the present disclosure, the antistatic layer contains a lubricant. The lubricant is an ethylene oxide-based nonionic surfactant with an HLB (Hydrophilic-Lipophilic Balance) value of 2 or more and 11 or less. If the HLB value is too low, the lubricant will have too good an affinity with the binder resin, making it difficult for the lubricant to localize on the surface of the antistatic layer (the surface of the cover tape), and blocking cannot be suppressed. On the other hand, if the HLB value is too high, the lubricant will have low compatibility with the binder resin, resulting in a high haze value. In addition, the lubricant will be more likely to attract moisture, which may cause the tapes to stick together like a water-based adhesive, resulting in blocking.

[0024] The HLB value of the ethylene oxide-based nonionic surfactant in the present disclosure is from 2 to 11, preferably from 3 or more, and particularly preferably from 3.5 or more. On the other hand, it is preferably from 8 or less, and particularly preferably from 7 or less. In this specification, the HLB value is a value calculated by the Griffin method (i.e., HLB value = 20 × sum of formula weights of hydrophilic moieties / molecular weight), and represents the degree of affinity of the surfactant for water and oil, taking values from 0 to 20, with values closer to 0 indicating higher lipophilicity and values closer to 20 indicating higher hydrophilicity.

[0025] In this specification, the term "ethylene oxide-based nonionic surfactant" refers to a nonionic surfactant having a (poly)oxyethylene group as a hydrophilic part. The (poly)oxyethylene group refers to at least one of an oxyethylene group (-C2H4-O-) and a polyoxyethylene group in which two or more ethylene groups are linked by ether bonds.

[0026] Specific examples of ethylene oxide-based nonionic surfactants having an HLB value of 2 or more and 11 or less include (poly)oxyethylene alkylamines such as (poly)oxyethylene laurylamine, (poly)oxyethylene-tallow alkylamine, (poly)oxyethylene stearylamine, (poly)oxyethylene-oleylamine, and (poly)oxyethylene alkylpropylene diamine; (poly)oxyethylene alkyl ethers such as (poly)oxyethylene lauryl ether, (poly)oxyethylene oleyl ether, (poly)oxyethylene-stearyl ether, (poly)oxyethylene-isodecyl ether, and (poly)oxyethylene-(poly)oxypropylene-alkyl ether; and (poly)oxyethylene fatty acid esters such as (poly)oxyethylene-monolaurate, (poly)oxyethylene-monostearate, (poly)oxyethylene-monooleate, and (poly)ethylene glycol-diolate, and include nonionic surfactants having an HLB value of 2 or more and 11 or less. Among these, (poly)oxyethylene alkylamines are preferred from the viewpoints of solubility in aqueous organic solvents and water resistance of the coating film. These may be used alone or in combination of two or more.

[0027] The content of the lubricant in the antistatic layer (ratio to the total solid content of the antistatic layer) is, for example, 1% by mass or more and 9% by mass or less, preferably 1.5% by mass or more and 8% by mass or less, and particularly preferably 2% by mass or more and 7.5% by mass or less. If the content is less than the above range, the effect of adding the lubricant is difficult to be achieved. On the other hand, if the content is more than the above range, the surface resistivity of the antistatic layer becomes high.

[0028] (b) Binder resin The antistatic layer contains a binder resin. The inclusion of the binder resin imparts to the coating film adhesion to the substrate, optical properties, mechanical properties, etc. The binder resin in the present disclosure is not particularly limited as long as it is a resin, but is preferably an acrylic binder resin or an epoxy binder resin.

[0029] In this disclosure, examples of acrylic binder resins include acrylic resins obtained by polymerizing or copolymerizing two or more of the following monomers: hydroxyl-containing monomers such as 2-hydroxyethyl methacrylate, hydroxyethyl acrylate, hydroxypropyl acrylate, and hydroxybutyl acrylate; amide-containing monomers such as acrylamide and N-methylolacrylamide; carboxyl-containing monomers such as acrylic acid, methacrylic acid, itaconic acid, and maleic anhydride; methyl acrylate, ethyl acrylate, N-butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, and 2-ethylhexyl methacrylate; and crosslinked acrylic resins obtained by crosslinking these resins with a crosslinking agent. Examples of crosslinking agents include melamine-based, urea-based, epoxy-based, isocyanate-based, aziridine-based, ethyleneimine-based, carbodiimide-based, oxazoline-based, and silane coupling agent-based compounds. In particular, acrylic resins having a carboxyl group and crosslinked acrylic resins obtained by crosslinking an acrylic resin having a carboxyl group with an aziridine crosslinking agent are preferred in terms of mechanical properties, water resistance, and adhesion. The acrylic binder resins may be used alone or in combination of two or more.

[0030] Examples of epoxy binder resins include bixylenol-type epoxy resins, bisphenol A-type epoxy resins, bisphenol F-type epoxy resins, bisphenol S-type epoxy resins, bisphenol AF-type epoxy resins, dicyclopentadiene-type epoxy resins, trisphenol-type epoxy resins, naphthol novolac-type epoxy resins, phenol novolac-type epoxy resins, tert-butyl-catechol-type epoxy resins, naphthalene-type epoxy resins, naphthol-type epoxy resins, anthracene-type epoxy resins, glycidylamine-type epoxy resins, glycidyl ester-type epoxy resins, cresol novolac-type epoxy resins, biphenyl-type epoxy resins, linear aliphatic epoxy resins, epoxy resins having a butadiene structure, alicyclic epoxy resins, heterocyclic epoxy resins, spiro ring-containing epoxy resins, cyclohexanedimethanol-type epoxy resins, naphthylene ether-type epoxy resins, trimethylol-type epoxy resins, and tetraphenylethane-type epoxy resins. The epoxy binder resins may be used alone or in combination of two or more.

[0031] The content of the binder resin in the antistatic layer is preferably 50% by mass or more and 98% by mass or less, and more preferably 70% by mass or more and 95% by mass or less. If the content is less than the above range, the coated antistatic layer is likely to peel off, and if the content is more than the above range, the antistatic agent and lubricant do not exert their full effects.

[0032] (c) Antistatic agent Examples of antistatic agents include metal oxides, conductive polymers, polymeric surfactants, low molecular weight surfactants, etc. In the present disclosure, conductive polymers are preferred.

[0033] Examples of conductive polymers include polythiophene, polyaniline, polypyrrole, polyacetylene, polyparaphenylene, polyphenylene vinylene, and polyvinylcarbazole. Among these, the conductive polymer is preferably one or more selected from the group consisting of polythiophene, polyaniline, and polypyrrole. This is because sufficient antistatic properties and transparency independent of humidity can be obtained. A preferred example of polythiophene is PEDOT / PSS ((poly(3,4-ethylenedioxythiophene)) / polystyrene sulfonic acid). A preferred example of polyaniline is sulfonated polyaniline. An antistatic layer containing the above-mentioned conductive polymer is preferable because it can achieve low surface resistivity even with a thin thickness. A thin antistatic layer can improve the light transmittance of the cover tape. Furthermore, a thin antistatic layer can reduce the light absorption rate of the cover tape. This can improve the visibility of the cover tape.

[0034] The content of the conductive polymer in the antistatic layer is preferably 5% by mass or more and 15% by mass or less, and more preferably 7% by mass or more and 12% by mass or less. If the content is less than the above range, the antistatic effect tends to be difficult to achieve, while if the content is more than the above range, the dispersibility tends to be poor and the adhesion, optical properties, and mechanical properties tend to be inferior.

[0035] The polymer surfactants and low molecular weight surfactants are each classified into cationic, anionic and nonionic types, and from the viewpoint of antistatic properties and coatability, cationic polymer surfactants are preferred.

[0036] Examples of cationic polymeric surfactants include quaternary ammonium salt polymers. Quaternary ammonium salt polymers are polymers containing quaternary ammonium bases. The type of main backbone of the polymer is not particularly limited; it may be a polymer of a single monomer or a copolymer of multiple monomers, and may be saturated or unsaturated. It may also contain other functional groups. The counter anion of the quaternary ammonium salt is not particularly limited; for example, a halogen ion or a sulfide ion is used. Aryl or alkyl groups are placed at the 1st to 3rd positions of the ammonium, and although not particularly limited, a carbon number of 6 or less is preferred from the viewpoint of solubility. The main chain of the polymeric quaternary ammonium salt is preferably an acrylic main chain from the viewpoints of transparency and substrate adhesion.

[0037] The content of the quaternary ammonium salt polymer in the antistatic layer is preferably 10% by mass to 30% by mass, more preferably 15% by mass to 20% by mass. If the content is less than the above range, the antistatic effect tends to be difficult to achieve, while if the content is greater than the above range, the adhesion, optical properties, and mechanical properties tend to be poor.

[0038] Examples of metal oxides include antimony-doped tin oxide (ATO), fluorine-doped tin oxide, phosphorus-doped tin oxide (PTO), aluminum-doped tin oxide, niobium-doped tin oxide, tantalum-doped tin oxide, tungsten-doped tin oxide, indium-doped tin oxide, tin oxide, tin-doped indium oxide (ITO), fluorine-doped indium oxide, cadmium-doped indium oxide, indium-doped zinc oxide, fluorine-doped zinc oxide, aluminum-doped zinc oxide, gallium-doped zinc oxide, magnesium-doped zinc oxide, silicon-doped zinc oxide, tin-doped zinc oxide, boron-doped zinc oxide, zinc oxide, zinc antimonate (AZO), and niobium-doped titanium oxide, and two or more of these may be used in combination. From the viewpoint of stabilizing the surface resistivity, antimony-doped tin oxide, tin-doped indium oxide, phosphorus-doped tin oxide, tin oxide, aluminum-doped zinc oxide, gallium-doped zinc oxide, and zinc antimonate are preferred. The average particle size of the metal oxide can be, for example, 0.01 μm or more and 1 μm or less, and from the viewpoint of transparency, it is preferably 0.01 μm or more and 0.5 μm or less. The content of the metal oxide in the antistatic layer is such that the surface resistivity is 1×10 10 The amount is preferably 10% by mass or more and 70% by mass or less, for example, 10% by mass or more and 70% by mass or less. The shape of the metal oxide may be spherical, acicular, or lamellar, but spherical or acicular shapes are preferred from the viewpoints of transparency, surface resistivity, and dispersibility.

[0039] The method for forming the antistatic layer may include, for example, a method of using a composition for an antistatic layer, in which an antistatic agent, a lubricant, a binder resin, etc. are dispersed or dissolved in a solvent, applying the composition for an antistatic layer to the surface of the substrate layer opposite to the heat seal layer side, and drying the composition. The method for applying the composition for an antistatic layer may include, for example, a known application method such as air doctor, blade coating, knife coating, rod coating, bar coating, direct roll coating, reverse roll coating, gravure coating, and slide coating.

[0040] The thickness of the antistatic layer can be, for example, 0.02 μm to 3 μm, and by making the antistatic layer of this thickness, it is possible to impart antistatic properties to the cover tape.

[0041] II. Base material layer The substrate layer in the present disclosure is a layer that supports the intermediate layer, heat seal layer, and antistatic layer. Various materials can be used for the substrate layer as long as they have the mechanical strength to withstand external forces during storage and transportation, and the heat resistance to withstand manufacturing and taping packaging. Examples include polyesters such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyethylene terephthalate-isophthalate copolymer, and terephthalic acid-cyclohexanedimethanol-ethylene glycol copolymer; polyamides such as nylon 6, nylon 66, and nylon 610; and polyolefins such as polyethylene, polypropylene, and polymethylpentene. Among these, polyesters such as polyethylene terephthalate and polyethylene naphthalate are preferred due to their cost and mechanical strength.

[0042] The substrate layer may contain additives such as fillers, plasticizers, colorants, and antistatic agents as needed. The substrate layer may be a single layer or a laminate of multiple layers of the same or different types. The substrate layer may be a stretched film or an unstretched film. In particular, the substrate layer may be a film that has been stretched uniaxially or biaxially to improve its strength.

[0043] The thickness of the substrate layer can be, for example, 2.5 μm to 300 μm, or 6 μm to 100 μm, or 12 μm to 50 μm. If the substrate layer is too thick, the rigidity during tape packaging increases, which is disadvantageous in terms of handling and cost. On the other hand, if the substrate layer is too thin, the water vapor barrier property decreases and the mechanical strength may be insufficient.

[0044] III. Heat seal layer The heat seal layer in the present disclosure is a layer disposed on one side of the base layer, and when a package is produced using the cover tape of the present disclosure, the heat seal layer is heat-sealed to the carrier tape to bond the cover tape and the carrier tape together.

[0045] The heat seal layer contains a thermoplastic resin, and the thermoplastic resin is preferably any one of an ethylene polymer, an acrylic resin, a polyester resin, a polyurethane resin, and a vinyl chloride-vinyl acetate copolymer, or a resin containing any of these as a main component. Among these, it is preferable that the thermoplastic resin contains an ethylene polymer.

[0046] An ethylene-based polymer is a polymer containing an ethylene unit (a structural unit derived from ethylene), and examples thereof include an ethylene homopolymer (polyethylene) and a copolymer of ethylene and another monomer (ethylene copolymer).

[0047] Examples of ethylene homopolymers include low-density polyethylene (LDPE), linear low-density polyethylene (L-LDPE), medium-density polyethylene (MDPE), and high-density polyethylene (HDPE).

[0048] Examples of other monomers constituting the ethylene copolymer include olefin monomers (propylene, butene, pentene, hexene, octene, etc.), unsaturated carboxylic acids (acrylic acid, methacrylic acid, etc.), unsaturated carboxylic acid esters (methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, dimethyl maleate, diethyl maleate, etc.), vinyl esters (vinyl acetate, vinyl propionate, fumaric acid, maleic anhydride, maleic acid monoester, etc.), etc. These may be used alone or in combination of two or more.

[0049] The ethylene content in the ethylene copolymer is not particularly limited, but can be from 60% to 98% by mass, or may be from 70% to 97% by mass. The content of other monomers in the ethylene copolymer is not particularly limited, but can be from 2% to 40% by mass, or may be from 3% to 30% by mass.

[0050] Among these, ethylene copolymers are preferably ethylene-vinyl acetate copolymers (EVA resins) and ethylene-acrylic-styrene copolymers. In particular, the heat seal layer preferably contains EVA resin. The heat seal layer containing EVA resin improves the heat sealability to the carrier tape. Therefore, unintended peeling during transportation, storage, etc. can be suppressed.

[0051] In this disclosure, EVA resin refers to a copolymer containing at least ethylene monomer units and vinyl acetate monomer units. The ethylene monomer units refer to structural units derived from ethylene monomers, and the vinyl acetate monomer units refer to structural units derived from vinyl acetate monomers. The ethylene content in the EVA resin is not particularly limited, but may be 60% by mass or more and 98% by mass or less, or 70% by mass or more and 97% by mass or less. The vinyl acetate content in the EVA resin is not particularly limited, but may be 2% by mass or more and 40% by mass or less, or 3% by mass or more and 30% by mass or less.

[0052] The EVA resin may contain a third monomer unit in addition to the ethylene monomer unit and the vinyl acetate monomer unit. The third monomer unit may contain a functional group having antistatic properties.

[0053] The content of the EVA resin in the heat seal layer is not particularly limited, but can be 50% by mass or more and 100% by mass or less, or 60% by mass or more and 80% by mass or less. Increasing the content of the EVA resin improves the heat seal performance.

[0054] When the heat seal layer of the present disclosure contains an EVA resin, the heat seal layer may further contain a polyethylene resin, which can reduce surface tackiness while maintaining good heat sealability and suppress deterioration after exposure to high humidity and heat.

[0055] Examples of polyethylene resins include various polyethylenes such as low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, and high-density polyethylene. Low-density polyethylene (LDPE, density 0.910 to less than 0.930) and linear low-density polyethylene (LLDPE, density 0.910 to 0.925) are preferably used because they have superior dispersibility.

[0056] In addition, in the present disclosure, the classification of various polyethylenes refers to those defined in the old JIS K6748:1995 and JIS K6899-1:2000. The content of polyethylene resin in the heat seal layer may be, for example, 0% by mass or more and 50% by mass or less, or 20% by mass or more and 40% by mass or less. Increasing the content of polyethylene resin decreases heat seal performance, but tends to decrease surface tackiness.

[0057] The heat seal layer may contain additives such as a tackifier, an antistatic agent, a dispersant, a filler, a plasticizer, a colorant, and an antiblocking agent, as required.

[0058] The thickness of the heat seal layer is not particularly limited, and can be, for example, 1 μm or more and 30 μm or less, preferably 10 μm or more and 20 μm or less. If the thickness of the heat seal layer is too thin, the sealing property may be poor and a uniform film may not be obtained. If the thickness of the heat seal layer is too thick, the transparency of the cover tape may be reduced, and the tack may be deteriorated (increased) due to the increase in stress in a single heat seal layer.

[0059] The method for forming the heat seal layer is not particularly limited, and known methods can be used. For example, a method (extrusion lamination method) can be used in which a heat-melted film raw material is extruded onto a substrate layer or an intermediate layer using a T-die or the like, and then pressure-bonded to the substrate layer or intermediate layer using a cooling roll. Another example is a method in which a pre-manufactured film is bonded to the substrate layer or intermediate layer using an adhesive. Examples of adhesives that can be used include polyester adhesives, polyurethane adhesives, and acrylic adhesives.

[0060] Another method for forming a heat seal layer includes, for example, using a composition for a heat seal layer in which a thermoplastic resin, additives, etc. are dispersed or dissolved in a solvent, applying the composition for a heat seal layer to a substrate layer described below, and drying the composition. Examples of methods for applying the composition for a heat seal layer include known application methods such as roll coating, reverse roll coating, gravure coating, gravure reverse coating, comma coating, bar coating, wire bar coating, rod coating, kiss coating, knife coating, die coating, flow coating, dip coating, and spray coating.

[0061] IV. Middle class The cover tape of the present disclosure may have an intermediate layer between the substrate layer and the heat seal layer. The intermediate layer can improve the adhesion between the substrate layer and the heat seal layer. The intermediate layer can also improve cushioning when the cover tape of the present disclosure is heat-sealed to the carrier tape, thereby allowing heat to be applied more uniformly to the heat seal layer.

[0062] The resin material used for the intermediate layer can be appropriately selected depending on the materials of the base layer and the heat seal layer, and examples thereof include polyolefins such as polyethylene and polypropylene, polyurethanes, and polyesters.

[0063] The thickness of the intermediate layer can be, for example, 5 μm or more and 50 μm or less. A film can be used as the intermediate layer. In this case, the method for laminating the substrate layer and intermediate layer is not particularly limited, and known methods can be used. For example, a method (extrusion lamination method) can be used in which a heat-molten film raw material is extruded onto the substrate layer using a T-die or the like, rapidly cooled and solidified using the cooling roll, and then pressure-bonded to the substrate layer. This forms an intermediate layer on one side of the substrate layer. It is preferable that an anchor coat layer is formed in advance on the surface of the substrate layer on which the intermediate layer will be disposed. Another method can be used in which a pre-manufactured film is attached to the substrate layer with an adhesive.

[0064] V.Adhesive layer Furthermore, an adhesive layer may be provided between the substrate layer and the intermediate layer, or between the intermediate layer and the heat-sealing layer. By forming an adhesive layer, even if the substrate layer, intermediate layer, or heat-sealing layer has poor adhesive strength, the adhesion between the substrate layer and the intermediate layer, or between the intermediate layer and the heat-sealing layer, can be improved. The adhesive layer may be appropriately selected depending on the materials used for the substrate layer, intermediate layer, and heat-sealing layer, and is not particularly limited. The adhesive layer may be formed from a resin with good adhesive properties, such as an olefin-based, acrylic-based, isocyanate-based, urethane-based, or ester-based adhesive.

[0065] The adhesive can be applied by, but not limited to, gravure coating, roll coating, or the like.

[0066] The thickness of the adhesive layer can be adjusted as appropriate. For example, it is set to 1 to 10 g / m to provide the cover tape with appropriate rigidity. 2 and preferably 2 to 5 g / m 2 1g / m 2 If this is the case, the adhesive strength can be made uniform.

[0067] VI.Physical properties (1)Surface resistivity The cover tape for packaging electronic components according to the present disclosure has a surface resistivity of 1×10 10 It is preferably Ω / □ or less, and more preferably 1×10 9 If the resistance is equal to or less than the above value, the cover tape has sufficient antistatic properties.

[0068] In the present disclosure, the "surface of the cover tape on which the antistatic layer is disposed" is not particularly limited, but is usually the surface of the antistatic layer.

[0069] The surface resistivity was measured using a Hiresta UP MCP-HT450 manufactured by Mitsubishi Chemical Analytech Co., Ltd. under the following test conditions. (Test conditions) Probe: UA probe Applied voltage: 10 10 Ω / □ or less 10V 10 10 ~10 12 Ω / □ 500V 10 13 Ω / □ or more 1000V Sample size: 50cm x 40cm Measurement point: Center of sample Measurement value: Measure five points so that the measurement points do not overlap, and use the average value. Measurement time: Display after 10 seconds Sample storage before measurement: Store at 25°C and 40% RH for at least 24 hours ·Measurement environment: 25±2℃, 40±5%RH environment

[0070] (2) Haze value The haze value of the cover tape of the present disclosure is preferably 55% or less, and more preferably 50% or less. The haze value is a value measured using a haze meter NDH 7000 (manufactured by Nippon Denshoku Industries Co., Ltd.) in accordance with JIS-K-7136. A cover tape having such optical properties will have good visibility.

[0071] (3) Total light transmittance The cover tape according to the present disclosure preferably has a total light transmittance of 80% or more, particularly 85% or more, in the cover tape formed by laminating the above-described layers. The total light transmittance is a value measured using a haze meter NDH 7000 (manufactured by Nippon Denshoku Industries Co., Ltd.) in accordance with JIS-K-7361 and JIS-K-7136. A cover tape having such optical properties will have better visibility.

[0072] (4) Width and length The width and length of the cover tape of the present disclosure can be appropriately set according to the width and length of the carrier tape. For example, the width of the cover tape is approximately 1 to 100 mm, and may be 5.25 mm to 5.5 mm. The length is approximately 100 to 10,000 m. The cover tape of the present disclosure is usually stored in a traverse-wound state before use (before being heat-sealed to the carrier tape).

[0073] B. Packaging The packaging body of the present disclosure comprises a carrier tape having a plurality of storage sections for storing electronic components, the electronic components stored in the storage sections, and the above-mentioned cover tape arranged to cover the storage sections.

[0074] A package using the cover tape of the present disclosure improves the visibility of electronic components when the electronic components are inspected visually or mechanically through the cover tape.

[0075] 2(a) and 2(b) are a schematic plan view and a cross-sectional view showing an example of the packaging body of the present disclosure. Note that since Figures 2(a) and 2(b) were described above in the section "A. Cover tape for packaging electronic components," their description will be omitted here.

[0076] Each configuration of the packaging body of the present disclosure will be described below.

[0077] 1. Cover tape The cover tape in this disclosure has been described above in the section "A. Cover tape for packaging electronic components," so a description thereof will be omitted here.

[0078] In the package of the present disclosure, the heat seal layer of the cover tape and the carrier tape are bonded together by a heat seal portion. The heat seal portion can be located, for example, in a portion of the area where the heat seal layer of the cover tape contacts the carrier tape. That is, the heat seal layer may have a heat seal portion and a non-heat seal portion. This improves the peelability of the cover tape from the carrier tape.

[0079] 2. Carrier tape The carrier tape in the present disclosure is a member having a plurality of storage sections for storing electronic components.

[0080] The carrier tape may be any tape having a plurality of storage sections, and may be, for example, an embossed carrier tape (also called an embossed tape), a punched carrier tape (also called a punched tape), or a pressed carrier tape (also called a pressed tape). Of these, an embossed carrier tape is preferably used from the viewpoints of cost, formability, dimensional accuracy, etc.

[0081] Examples of materials for the carrier tape include plastics such as polyvinyl chloride, polystyrene, polyester, polypropylene, polycarbonate, polyacrylonitrile, and ABS resin, as well as paper, etc. In the present disclosure, paper refers to a material containing cellulose as its main component and may further contain a resin component.

[0082] The thickness of the carrier tape is appropriately selected depending on the material of the carrier tape, the thickness of the electronic components, etc. For example, the thickness of the carrier tape can be 30 μm or more and 1500 μm or less. If the carrier tape is too thick, moldability may be poor, and if the carrier tape is too thin, strength may be insufficient.

[0083] The carrier tape has a plurality of storage sections. The storage sections are usually arranged at predetermined intervals in the longitudinal direction of the carrier tape. The size, depth, pitch, etc. of the storage sections are appropriately adjusted depending on the size, thickness, etc. of the electronic components.

[0084] A general carrier tape molding method can be applied as a method for forming a carrier tape having a storage portion, and the method can be appropriately selected depending on the type and material of the carrier tape, etc. Examples include press molding, vacuum molding, pressure molding, punching, compression processing, etc.

[0085] 3. Electronic Components The electronic components used in the package of the present disclosure are not particularly limited, and examples thereof include ICs, resistors, capacitors, inductors, transistors, diodes, LEDs (light-emitting diodes), liquid crystals, piezoelectric element resistors, filters, quartz oscillators, quartz vibrators, connectors, switches, volumes, relays, etc. The type of IC is also not particularly limited.

[0086] 4.Other The package of the present disclosure is used for storing and transporting electronic components. The electronic components are stored and transported in the package and are then mounted. During mounting, the cover tape is peeled off, the electronic components stored in the carrier tape storage compartment are removed, and the components are mounted on a substrate or the like.

[0087] The present disclosure is not limited to the above-described embodiments. The above-described embodiments are merely examples, and any configuration that is substantially identical to the technical idea described in the claims of the present disclosure and that provides similar effects is included within the technical scope of the present disclosure. [Example]

[0088] The present disclosure will be described in more detail below with reference to examples and comparative examples. Example 1 A 25 μm-thick biaxially stretched polyethylene terephthalate film (FE2002 manufactured by Futamura Chemical Co., Ltd., hereinafter referred to as PET film) was prepared as the substrate layer, with both sides subjected to corona treatment. Antistatic composition 1 was applied to one side of the PET film to form an antistatic layer with a thickness of approximately 40 nm. The content of the lubricant in the antistatic layer (ratio to the total solid content of the antistatic layer) was approximately 3 mass%. The antistatic layer also contained PEDOT / PSS as the conductive polymer and a crosslinked acrylic resin as the binder, in which an acrylic resin having a carboxyl group was crosslinked with an aziridine-based crosslinking agent. A urethane anchor coating agent (Takenate A-3075 / Takelac A-3210 (mass ratio) = 3 / 1, diluted 5% with ethyl acetate) was applied to the surface of the PET film opposite to the surface on which the antistatic layer was formed, to form an anchor layer.

[0089] Next, a 15 μm thick intermediate layer was formed on the surface of the PET film on which the anchor layer was formed using a polyethylene resin (Novatec LC600A, manufactured by Japan Polyethylene Corporation) by melt extrusion lamination. Next, a 15 μm thick heat seal layer was formed on the surface opposite the anchor layer side of the intermediate layer using heat seal composition 1 by melt extrusion lamination to produce a cover tape. The cover tape is composed of an antistatic layer (approximately 40 nm) / base layer (25 μm) / anchor layer / intermediate layer (15 μm) / heat seal layer (15 μm).

[0090] Antistatic composition 1 Lubricant: Nymeen L202 (polyoxyethylene laurylamine, NOF Corporation, solid content 100%), 0.12 wt% Main ingredient: Aracoat AS601D (Arakawa Chemical Industries, Ltd., solid content 3.5%) 88.16 wt% Crosslinking agent: Araquat CL910 (manufactured by Arakawa Chemical Industries, Ltd., solid content 10%) 8.82 wt% Additive: Ethylene glycol 2.91wt% A mixture of the above was prepared and the solid content was adjusted to 1.3% using a solvent of IPA / water = 7 / 3.

[0091] Heat sealing composition 1 EVA: EV450 Mitsui Dow Polychemicals 55wt% LDPE: L813 Sumitomo Chemical Co., Ltd. 28wt% Tackifier: Alcon P-115 13wt% Antistatic agent: Elastmaster LL-10 4wt%

[0092] (Examples 2 to 6, Comparative Examples 1 to 5) A cover tape was prepared in the same manner as in Example 1, except that the antistatic layer was formed using the antistatic compositions shown in Table 1. The compositions of the antistatic compositions shown in Table 1 are as follows. The HLB values of the lubricants used are also shown in Table 1.

[0093] Antistatic composition 2 Lubricant: Nymeen T2 202 (polyoxyethylene tallow alkylamine, NOF Corporation, solids content 100%), 0.12 wt% Main ingredient: Aracoat AS601D (Arakawa Chemical Industries, Ltd., solid content 3.5%), 88.16 wt% Crosslinking agent: Araquat CL910 (Arakawa Chemical Industries, Ltd., solid content 10%) 8.82 wt% Additive: Ethylene glycol 2.91wt% The mixture was adjusted to a solids concentration of 1.3% with a solvent of IPA / water = 7 / 3. The content of the lubricant in the formed antistatic layer (ratio to the total solids content of the antistatic layer) was approximately 3 mass %.

[0094] Antistatic composition 3 Lubricant: Nymeen T2 202 (polyoxyethylene tallow alkylamine, NOF Corporation, solids content 100%), 0.20 wt% Main ingredient: Aracoat AS601D (Arakawa Chemical Industries, Ltd., solid content 3.5%), 88.09 wt% Crosslinking agent: Araquat CL910 (Arakawa Chemical Industries, Ltd., solid content 10%) 8.81 wt% Additive: Ethylene glycol 2.91wt% The mixture was adjusted to a solids concentration of 1.3% with a solvent of IPA / water = 7 / 3. The content of the lubricant in the formed antistatic layer (ratio to the total solids content of the antistatic layer) was about 5 mass %.

[0095] Antistatic composition 4 Lubricant: Nymeen S 202 (polyoxyethylene stearylamine, NOF Corporation, solid content 100%), 0.20 wt% Main ingredient: Aracoat AS601D (Arakawa Chemical Industries, Ltd., solid content 3.5%), 88.09 wt% Crosslinking agent: Araquat CL910 (Arakawa Chemical Industries, Ltd., solid content 10%) 8.81 wt% Additive: Ethylene glycol 2.91wt% The mixture was adjusted to a solids concentration of 1.3% with a solvent of IPA / water = 7 / 3. The content of the lubricant in the formed antistatic layer (ratio to the total solids content of the antistatic layer) was about 5 mass %.

[0096] Antistatic composition 5 Lubricant: Nymeen L 201 (polyoxyethylene laurylamine, NOF Corporation, solids content 100%), 0.12 wt% Main ingredient: Aracoat AS601D (Arakawa Chemical Industries, Ltd., solid content 3.5%), 88.16 wt% Crosslinking agent: Araquat CL910 (Arakawa Chemical Industries, Ltd., solid content 10%) 8.82 wt% Additive: Ethylene glycol 2.91wt% The mixture was adjusted to a solids concentration of 1.3% with a solvent of IPA / water = 7 / 3. The content of the lubricant in the formed antistatic layer (ratio to the total solids content of the antistatic layer) was approximately 3 mass %.

[0097] Antistatic composition 6 Lubricant: Nymeen S 204 (polyoxyethylene stearylamine, NOF Corporation, solid content 100%), 0.28 wt% Main ingredient: Aracoat AS601D (Arakawa Chemical Industries, Ltd., solid content 3.5%), 88.02 wt% Crosslinking agent: Araquat CL910 (Arakawa Chemical Industries, Ltd., solid content 10%) 8.80 wt% Additive: Ethylene glycol 2.90wt% The mixture was adjusted to a solids concentration of 1.3% with a solvent of IPA / water = 7 / 3. The content of the lubricant in the formed antistatic layer (ratio to the total solids content of the antistatic layer) was approximately 7 mass %.

[0098] Antistatic composition 7 Lubricant: Nonion OP-85R (sorbitan trioleate, NOF Corporation, solids content 100%), 0.12 wt% Main ingredient: Aracoat AS601D (Arakawa Chemical Industries, Ltd., solid content 3.5%), 88.16 wt% Crosslinking agent: Araquat CL910 (Arakawa Chemical Industries, Ltd., solid content 10%) 8.82 wt% Additive: Ethylene glycol 2.91wt% The mixture was adjusted to a solids concentration of 1.3% with a solvent of IPA / water = 7 / 3. The content of the lubricant in the antistatic layer (ratio to the total solids content of the antistatic layer) was about 3 mass %.

[0099] Antistatic composition 8 Lubricant: Nonion OP-85R (sorbitan trioleate, NOF Corporation, solids content 100%), 0.40 wt% Main ingredient: Aracoat AS601D (Arakawa Chemical Industries, Ltd., solid content 3.5%), 87.91 wt% Crosslinking agent: Araquat CL910 (Arakawa Chemical Industries, Ltd., solid content 10%) 8.79 wt% Additive: Ethylene glycol 2.90wt% The mixture was adjusted to a solids concentration of 1.3% with a solvent of IPA / water = 7 / 3. The content of the lubricant in the antistatic layer (ratio to the total solids content of the antistatic layer) was about 9 mass %.

[0100] Antistatic composition 9 Lubricant: Nonion P-208 (polyoxyethylene cetyl ether, NOF Corporation, solids content 100%), 0.40 wt% Main ingredient: Aracoat AS601D (Arakawa Chemical Industries, Ltd., solid content 3.5%), 87.91 wt% Crosslinking agent: Araquat CL910 (Arakawa Chemical Industries, Ltd., solid content 10%) 8.79 wt% Additive: Ethylene glycol 2.90wt% The mixture was adjusted to a solids concentration of 1.3% with a solvent of IPA / water = 7 / 3. The content of the lubricant in the antistatic layer (ratio to the total solids content of the antistatic layer) was about 9 mass %.

[0101] Antistatic composition 10 No lubricant added Main ingredient: Aracoat AS601D (Arakawa Chemical Industries, Ltd., solid content 3.5%), 88.26 wt% Crosslinking agent: Araquat CL910 (Arakawa Chemical Industries, Ltd., solid content 10%) 8.83 wt% Additive: Ethylene glycol 2.91wt% A mixture of the above was prepared and the solid content was adjusted to 1.3% using a solvent of IPA / water = 7 / 3.

[0102] Antistatic composition 11 Lubricant: Elegan 264WAX (NOF Corporation, solids content 100%), 0.28 wt% Main ingredient: Aracoat AS601D (Arakawa Chemical Industries, Ltd., solid content 3.5%), 88.02 wt% Crosslinking agent: Araquat CL910 (Arakawa Chemical Industries, Ltd., solid content 10%) 8.80 wt% Additive: Ethylene glycol 2.90wt% The mixture was adjusted to a solids concentration of 1.3% with a solvent of IPA / water = 7 / 3. The content of the lubricant in the antistatic layer (ratio to the total solids content of the antistatic layer) was about 7 mass %.

[0103] [Surface resistivity measurement] The surface resistivity of the surface of the antistatic layer side of the cover tape produced above (antistatic layer surface) was measured by the method described above in "A. Cover tape for packaging electronic components VI. Physical properties (1) Surface resistivity." The results are shown in Table 1.

[0104] [Haze measurement] The haze of the cover tape produced above was measured by the method described above in "A. Cover tape for packaging electronic components VI. Physical properties (2) Haze value." The results are shown in Table 1.

[0105] [Removal force after blocking] Two 4cm x 4cm pieces were cut out of each film sample, and the two films were overlapped so that the antistatic layer of one sample was in contact with the heat seal layer of the other sample. The two overlapping films were tested with a blocking tester at a strength of 0.1N / mm 2 The sample was stored for 100 hours in an environment of 40°C and 90% RH with the applied pressure.

[0106] After storing the film at room temperature for six hours, a Tensilon universal testing machine RTF1150 was used to secure one edge of the two stacked films to one chuck and the other edge to the other chuck. The film was then peeled at a speed of 300 mm / min at a 90°C peel, and the peel force was measured as the two films peeled apart. The data was taken from 10 mm to 35 mm after the start of peeling, and the average of the four results was used as the measurement value. N=5 measurements were performed, and the average was used as the measurement result.

[0107] [Blocking rating] The cover tape produced as described above was cut to a width of 5.25 mm. The cut cover tape was then wound up to obtain a wound product. The presence or absence of blocking resistance was evaluated using the following evaluation method and criteria. The results are shown in Table 1.

[0108] Evaluation method The edges of the cover tape film of a 3000m traverse roll (3-inch core, 180mm wide, cardboard tube) slit to 5.25mm width were secured with Scotch tape (registered trademark) to prevent misalignment, and the roll was placed in a new polyethylene bag (standard bag, LDPE, transparent, 0.025mm thick, No. 12, 230 x 340mm (Fukusuke Kogyo)). The bag's opening was then inserted into the cardboard tube. The traverse roll was then placed vertically at 40°C and 90% RH for 3 hours, then removed to room temperature (20-25°C, 40±10% RH). Within 60 seconds, the roll was placed vertically in a 7°C refrigerated environment for 3 hours without opening. After removal from the refrigerated environment, the traverse roll was left vertically in the bag at room temperature (20-25°C, 40±10% RH) for 12 hours. Five to eight meters of the film end of each sample was discarded, and as shown in Figure 4, (1) a predetermined amount of the film end was pulled out, and (2) the roll was rotated at a rate of 2 to 3 seconds per rotation. The blocking resistance was evaluated according to the following criteria.

[0109] Evaluation criteria ×: When the film does not come off even after rotating the film 180° after pulling out 30 mm from the 3 o'clock position (the pulled-out part is at the 9 o'clock position) △: At the 3 o'clock position, after pulling out 15 mm of the film end, the film peels off from the roll and falls naturally when rotated 180 degrees. ○: At the 3 o'clock position, after pulling out 10 mm of the film end, the film peels off from the roll and falls naturally when rotated 180°.

[0110] [Table 1]

[0111] As shown in Table 1, it was confirmed that the cover tapes (Examples 1 to 6) having an antistatic layer containing an ethylene oxide-based nonionic surfactant with an HLB value of 2 or more and 11 or less as a lubricant had good haze values and suppressed blocking.

[0112] In Comparative Example 1, which used a nonionic surfactant with an HLB value of less than 2, it was confirmed that the blocking suppression effect was insufficient. This is presumably because the low HLB value gave it too good affinity with the binder resin, making it difficult for localization on the surface. It was also confirmed that increasing the content of such a lubricant worsened the haze value (Comparative Example 2).

[0113] In Comparative Example 3, which used a nonionic surfactant with an HLB value of more than 11, it was confirmed that the haze value deteriorated. This is presumably due to low affinity with the binder resin, resulting in low compatibility. It was also confirmed that the blocking suppression effect was insufficient. This is presumably due to the fact that the surfactant is highly hydrophilic, which easily attracts moisture, causing the tapes to stick to each other like wet application.

[0114] The cover tape of Comparative Example 4, which had an antistatic layer containing no lubricant, was unable to suppress blocking. Also, the haze value was confirmed to be worse in Comparative Example 5, which did not use an ethylene oxide-based nonionic surfactant as a lubricant. [Explanation of symbols]

[0115] 1... Cover tape 2 … Base material layer 3... Heat seal layer 4...Antistatic layer 5. Middle class 10 … Packaging 11... Carrier tape 12...Storage area 13...Electronic components

Claims

1. a substrate layer; a heat seal layer disposed on one surface side of the base material layer; an antistatic layer disposed on the surface of the base layer opposite to the surface on which the heat seal layer is disposed, the antistatic layer comprises an antistatic agent, a lubricant, and a binder resin; the lubricant is an ethylene oxide-based nonionic surfactant having an HLB value of 2 or more and 11 or less, the ethylene oxide-based nonionic surfactant is at least one of a (poly)oxyethylene alkylamine and a (poly)oxyethylene fatty acid ester; The cover tape for packaging electronic components, wherein the binder resin is an acrylic binder resin or an epoxy binder resin.

2. The surface resistivity of the surface of the cover tape for packaging electronic components on which the antistatic layer is disposed is 1×10 １０ 2. The cover tape for packaging electronic components according to claim 1, having a resistance of Ω / □ or less.

3. 3. The cover tape for packaging electronic components according to claim 1, wherein the ethylene oxide-based nonionic surfactant is a (poly)oxyethylene alkylamine.

4. 4. The cover tape for packaging electronic components according to claim 1, wherein the antistatic agent is a conductive polymer.

5. a carrier tape having a plurality of storage sections for storing electronic components; an electronic component housed in the housing; The cover tape for packaging electronic components according to any one of claims 1 to 4, which is disposed so as to cover the storage section; A packaging body comprising:

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