Carbon nanotubes in carrier tape, cover tape and electrostatic shielding bag

Abstract

Carbon nanotubes in carrier tapes, cover tapes, and electrostatic shielding bags. A carrier tape is provided comprising: a plurality of aligned pockets configured and arranged for transporting electronic components; the carrier tape is formed of a material comprising a polymer and carbon nanotubes, the polymer comprising 0.99% to 99% by weight of the material, the carbon nanotubes comprising 0.01% to 3% by weight of the material, the carbon nanotubes having an aspect ratio of 3000:1 to 6000:1, the carbon nanotubes being selected from double-walled carbon nanotubes and triple-walled or more walled carbon nanotubes and combinations thereof, the wall spacing between adjacent walls of the double-walled and triple-walled or more walled carbon nanotubes being 0.20 nm to 0.34 nm, wherein the carrier tape has a 1×10 5 Up to 1×10 12 The range of electrostatic dissipation measured in Ω / sq.

Description

[0001] This invention patent application is a divisional application of the invention patent application with application number 201910625962.9, application date July 11, 2019, entitled "Carrier tape, cover tape and electrostatic shielding bag containing carbon nanotubes".

[0002] Cross-referencing related applications

[0003] This application claims priority to U.S. Provisional Patent Application Serial No. 62 / 697075, filed July 12, 2018, the disclosure of which is incorporated herein by reference in its entirety. This application also claims priority to U.S. Provisional Patent Application Serial No. 62 / 733746, filed September 20, 2018, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0004] This invention generally relates to antistatic packaging for transporting electronic components in a carrier belt sealed with a cover and an antistatic bag, wherein the antistatic packaging is at least partially formed of carbon nanotubes. The inclusion of carbon nanotubes in the antistatic packaging improves the electrostatic dissipation and conductivity of the packaged product. Background Technology

[0005] Currently, carbon black is used in carrier tapes as an additive to achieve a completely uniform thickness, or as part of separate top and bottom cap layers to increase the conductivity of commonly used insulating materials used to form the carrier tape. The use of carbon black helps reduce static buildup along the carrier tape during the transport of electronic components. Static buildup can discharge, leading to damage or destruction of sensitive electronic components that are placed in carrier tape pockets and / or antistatic bags during transport.

[0006] The carrier belt can be made from an extruded preform, which can then be reheated and formed, or can be formed immediately after extrusion in a continuous process into a carrier belt, cover belt, or antistatic bag.

[0007] Currently, electrostatic shielding bags are formed by laminating multiple layers together with at least one foil or metallized film layer between the outer layers. The at least one foil or metallized film layer provides a conductive path for transferring or dissipating electricity or static electricity from the contents of the bag, thus protecting electrically sensitive products transported within the bag. The elimination of static electricity reduces electrostatic charges that could damage or destroy sensitive electronic components transported within the electrostatic shielding bag.

[0008] Electrostatic shielding bags typically have three to five layers. One or more of these layers may consist of materials with different properties, such as electrostatic shielding, moisture protection, or puncture resistance. The thickness of a single layer within an electrostatic shielding bag is typically 0.0005 inches to 0.003 inches, and the overall bag thickness is 0.002 inches to 0.008 inches. A typical 3-layer bag may use an electrostatic dissipative polyester outer layer, a central foil shield, and an electrostatic dissipative polyethylene inner layer. Additional layers may include nylon or other polymers to increase strength, moisture protection, or additional electrostatic shielding. A 5-layer bag may include two aluminum foil shields separated centrally by a polyester layer instead of a single foil shield.

[0009] When various materials are laminated together to form a bag material, moisture protection can be provided in an electrostatic shielded bag.

[0010] A common configuration of the cover tape includes three (3) layers. The first layer typically consists of a biaxially oriented film that provides rigidity to the cover tape. The first layer may be formed of a polyester such as polyethylene terephthalate (PET / BO-PET). The second layer or intermediate material is bonded to the first layer by using a sealant layer, which may be formed of polyethylene (PE), polypropylene (PP), and ethylene-vinyl acetate copolymer (EVA). It should be noted that other polymers / compounds may be used. The sealant used as the third material may vary depending on the material used in the intermediate material. The third material is typically formed of two or more common sealant polymer components, including but not limited to ethylene-vinyl acetate copolymer (EVA), polyurethane-based resin (PU), polyethylene resin (PE), polyvinyl chloride (PVC), etc.

[0011] Current cover tapes typically use π-electron conjugated conductive polymers, including but not limited to poly(3,4-ethylenedioxythiophene / polystyrene sulfonic acid (PEDOT / PSS), poly(3-propylthiophene), and poly(3-ethylpyrrole); and finely powdered conductive materials such as titanium oxide, zinc oxide, tin oxide, carbon black, or combinations thereof. The conjugated conductive polymer can be an additive to the base film layer to increase its conductivity. When used with the cover tape, this layer is coated with a thermally activated adhesive, which acts as a barrier to the film layer and prevents electrostatic control on the device side of the cover tape.

[0012] The techniques mentioned and / or described above do not imply an admission that any patents, publications or other information referred to herein are "prior art" concerning the invention. Furthermore, this section should not be construed as indicating that a search has been conducted or that other relevant information as defined in 37 C.FR § 1.56(a) is absent.

[0013] All U.S. patents and applications mentioned anywhere in this application, as well as all other publications, are incorporated herein by reference in their entirety.

[0014] Without limiting the scope of the invention, a brief description of some claimed embodiments of the invention is set forth below. Further details of the general embodiments of the invention and / or other embodiments of the invention can be found in the detailed description of the invention below.

[0015] For purposes of conformity with 37C.FR § 1.72, a brief summary of the technical disclosures in the specification is provided. Summary of the Invention

[0016] In one embodiment, the carrier tape includes a plurality of aligned pockets that transport electronic components, and the carrier tape is formed of carbon nanotubes and a polymer comprising between 0.99% and 99% by weight, wherein the carbon nanotubes comprise between 0.01% and 3% by weight.

[0017] In another embodiment, the carbon nanotubes are selected from single-walled carbon nanotubes, double-walled carbon nanotubes, triple-walled or more-walled carbon nanotubes, and combinations thereof.

[0018] In another alternative embodiment, the wall spacing between adjacent walls of double-walled carbon nanotubes and triple-walled or more-walled carbon nanotubes is 0.20 nm to 0.34 nm.

[0019] In at least one embodiment, the diameter of each carbon nanotube is between 1 nm and 100 nm.

[0020] In some implementations, the surface area of ​​each carbon nanotube is 600 m². 2 / g to 1000m 2 / g.

[0021] In at least one alternative embodiment, the carbon nanotubes used in the carrier tape, cover tape, or electrostatic dissipation bag have an aspect ratio of 3000:1 to 6000:1 in terms of length to diameter.

[0022] In some alternative embodiments, carbon nanotubes are added to the polymer as a pristine carbon nanotube material before the carrier tape is extruded or during the formation of sheets for manufacturing electrostatic dissipative bags.

[0023] In at least one alternative embodiment, the polymer is selected from polycarbonate (PC), acrylonitrile butadiene styrene (ABS), polypropylene (PP), polystyrene (PS), polyethylene terephthalate (PET), high-density polyethylene (HDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), styrene-acrylonitrile (SAN), polyethylene (PE), polyester (PETE), and combinations thereof.

[0024] In at least one alternative embodiment, the carrier tape, cover tape, or electrostatic dissipation bag containing carbon nanotubes has a measured value of 1 × 10⁻⁶. 5 Up to 1×10 12 Electrostatic dissipation range in Ω / sq.

[0025] In some embodiments, the carrier tape, cover tape, or electrostatic dissipation bag containing carbon nanotubes has a light transmittance value of 60% to 90%, a haze value of 60% to 70%, and / or a transparency value of 25% to 45%.

[0026] In some implementations, carrier tapes, capping tapes, and / or electrostatic dissipative bags containing carbon nanotubes reduce surface defects, reduce high-density entanglement, and / or reduce coalescence during manufacturing.

[0027] In at least one embodiment, a carrier tape, cover tape, and / or electrostatic dissipation bag containing carbon nanotubes reduces carbon material transfer.

[0028] In at least one alternative embodiment, the carrier tape includes a cover tape having a thermally activated adhesive or a pressure-sensitive adhesive, the cover tape being formed of at least one layer comprising a polymer and carbon nanotubes.

[0029] By utilizing carbon nanotubes in a thermally activated adhesive layer, electrostatic control within the carrier bag can be improved. This helps reduce the buildup of static electricity that could damage or destroy sensitive electronic components placed and transported within the carrier bag. Carbon nanotubes can also be used to control the surface resistivity of the base film layer and maintain the transparency of the material.

[0030] The cap tape incorporates carbon nanotubes (CNTs) dispersed throughout the thermally activated adhesive coating or within the base polymer film. In both cases, the surface resistivity of the base film and adhesive coating can be controlled, preventing electrostatic discharge and damage to electrostatically sensitive devices sealed into the carrier bag with the cap tape. Carbon nanotubes provide consistent and repeatable surface resistivity (SR) readings and are less affected by heating and forming cycles. Adding a small amount of CNTs to the base material makes the finished product transparent. Translucent to transparent materials offer the advantage of allowing the device to be seen within the bag during loading, transporting, picking, and placement operations.

[0031] CNTs have a high aspect ratio, require minimal load, and allow for consistent control of surface resistivity. Carbon nanotubes, including single-walled and multi-walled carbon nanotubes, can be used as conductive additives in capping tape adhesives and backing film tapes.

[0032] CNTs can be incorporated into various polymers, such as polyesters and polyolefins, which are commonly used in capping tapes, but are not limited to these.

[0033] The preparation of coated products using CNTs can be accomplished by adding carbon nanotubes in their original form to the coating mixture and dispersing them through mixing and application. The carbon nanotubes can be mixed in various proportions, depending on the percentage of CNTs in the masterbatch, based on the target final surface resistivity level of the capping thermally activated binder.

[0034] For membranes, CNTs can also be premixed into the final resin that can be fed directly into the extruder, or carbon nanotubes can be added using a carrier material compatible with the base membrane and mixed with the base resin before extrusion.

[0035] These and other embodiments characterizing the invention are specifically pointed out in the appended claims and constitute a part of the invention. However, for a further understanding of the invention, and for the advantages and purposes obtained by using it, reference should be made to the accompanying drawings and descriptions that form another part of the invention, in which embodiments of the invention are shown and described. Attached Figure Description

[0036] Figure 1 The cover strip with a three-layer configuration is shown. Detailed Implementation

[0037] In some embodiments, the carbon nanotubes included in the carrier tape invention disclosed herein are used as carbon nanotubes (CNTs) dispersed throughout the carrier tape in the form of a uniformly extruded material, or as a capping layer on a multilayer extruded material. Carbon nanotubes provide more consistent and reproducible surface resistivity (SR) readings. Electrostatic dissipative materials utilizing carbon nanotubes have a resistivity of 1 × 10⁻⁶. 5 Up to 1×10 12 Surface resistivity reading in Ω / sq. This surface resistivity level reduces the likelihood of electrostatic discharge damage to components. Compared to carbon black with a higher SR reading (6 decades in a decimal scale), using a combination of carbon nanotubes and polymers allows for targeting and control of the SR reading to a smaller range (3 decimal digits or 10 sq). 3 (3 decades or 10^3 in a Decade Scale). Products made with carbon nanotubes are less affected by the heating and forming cycles used during carrier formation because the smaller particle size associated with carbon nanotubes allows for better material dispersion and more consistent density changes during stretching.

[0038] In certain embodiments, typical carbon nanotubes exist in single-walled, double-walled, and multi-walled variants, in which each wall has an adjacent spacing of ~0.34 nm. The diameter of the carbon nanotubes ranges from about 1 nm to about 100 nm.

[0039] In other embodiments, a smaller amount (typically less than or equal to about 3%) of carbon nanotubes is used to obtain an acceptable range of electrostatic dissipation, with the carbon nanotubes ranging in size from 1 nm to 100 nm.

[0040] Adding carbon nanotubes with a disclosed size range to the base material provides a comparable surface resistivity to the manufactured product, compared to adding approximately 10-15% carbon black to the base material.

[0041] In at least one embodiment, carbon nanotubes can be incorporated into a base material formed from various polymers, such as polycarbonate (PC), acrylonitrile butadiene styrene (ABS), polypropylene (PP), polystyrene (PS), polyethylene terephthalate (PET), high-density polyethylene (HDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), styrene-acrylonitrile (SAN), polyethylene (PE), or polyester (PETE), and other thermoplastic materials. It should be noted that the use of carbon nanotubes is not limited to use with the aforementioned polymers, but can be used with other polymers or other materials, including composite materials.

[0042] In some implementations, the final packaged product becomes more transparent compared to using carbon black materials because low-volume CNT materials are used to achieve the desired light transmittance (SR) level. Currently, packaging materials formed with carbon black are opaque, while those formed with CNTs have light transmittance values ​​of 60%–90%, depending on the amount of CNTs used. During the use of carbon nanotube materials, haze is found in packaging materials ranging from 60% to 70%, and transparency ranges from 25% to 45%. For carriers made with carbon black materials, these values ​​are typically 0%, as carbon black makes the carrier black and opaque. Light transmittance, haze, and transparency can vary depending on the type of base material used for the carrier and the properties of its initial base material.

[0043] In at least one embodiment, the translucent to transparent material of the carrier tape formed from carbon nanotubes has the advantage of allowing the electronic device disposed in the carrier tape pocket to be seen during loading, transporting, picking up, and placing operations of the electronic device. The translucent carrier tape also eliminates the need for pocket holes for in-pocket device verification, reducing the likelihood of debris entering the pocket, which could be formed during pocket hole punching.

[0044] In some implementations, the use of carbon nanotubes instead of carbon black improves the surface finish of the carrier because surface defects such as gel / particles are reduced. The reduction in particle size compared to the use of carbon black is related to the use of CNTs as an additive and the loading of a lower volume of CNT material.

[0045] In some implementations, the low percentage of additives used in the formation of carrier tapes or antistatic bags results in a more uniform dispersion of CNTs throughout the packaging material and reduces the accumulation of high-density entanglements or agglomerates. Agglomerates are aggregates of nanomaterials permanently clustered together, consisting of 10 to 1000 individual nanoparticles, and if present, significantly increase the size of the original nanoparticles: this ultimately leads to changes in desired properties such as conductivity.

[0046] In at least one embodiment, poor dispersion of the additive material into the base material results in two significant consequences: the large amount of undispersed material on the surface will be more susceptible to electrostatic discharge, and the gaps between particles can reduce electrostatic discharge.

[0047] In some implementations, due to the lower content and smaller particle size of the additives, the carrier tape formed from carbon nanotubes will have less carbon material transferred (collapse) compared to carbon black base materials. The carbon black will entangle and create relatively large surface areas, which are then easily scraped and transferred (collapsed) onto the surface of the device or material that contacts the carbon black surface area in the carrier tape pocket. Conventional carbon black does not exist as a primary individual particle, but rather consists of multiple fused particles forming aggregates with a common size of 50 μm to 500 μm, whereas CNT materials have a size range of 1 nm to 100 nm.

[0048] In some implementations, carbon nanotubes (CNTs) have a higher aspect ratio (3000:1 to 6000:1 length / diameter ratio) compared to carbon black (which has an irregular shape due to aggregation), thus providing more exposed surface area per volume and making CNTs more efficient conductors. Aspect ratio is the ratio of length to diameter. The higher aspect ratio of CNTs compared to carbon black materials results in a higher percentage of surface area. Carbon black typically also has overlapping aggregates, further reducing its effective surface area. The surface area of ​​CNTs is 600 m². 2 / g to 1000m 2 / g, while the surface area of ​​carbon black is 50m² 2 / g to 150m 2 / g. Compared to carrier tapes formed from carbon black materials, carrier tapes formed from CNTs will be more efficient conductors.

[0049] In many embodiments, carbon nanotubes include single-walled and multi-walled carbon nanotubes, which can be used as conductive additives in the carrier.

[0050] In some embodiments, the manufacture of carrier tapes from extruded products / polymers using carbon nanotubes can be achieved by adding the carbon nanotubes in granulated form to the extruder, using another polymer as the carrier tape material, wherein the amount of CNTs is 0.01% to 3% by weight of the total amount of single-walled and multi-walled CNTs. The carbon nanotubes and polymer carrier can be blended with thermoplastic materials such as LLDPE, PET, SAN, ABS, etc., as described herein, or with materials equivalent to those described herein, in various proportions from 0.01% to 3%, depending on the desired target surface resistivity in the masterbatch. The desired target surface resistivity in the masterbatch is based on the target final surface resistivity level of the carrier tape. Alternatively, the carbon nanotubes can be premixed into the final resin, which can be fed directly into the extruder. This is accomplished by mixing the CNTs and the desired thermoplastic resin into the extruder and granulating the output.

[0051] In at least one embodiment, the carrier tape may be integrated with carbon nanotubes to achieve electrostatic dissipation or electrical conductivity. The carrier tape containing carbon nanotubes can be formed by extruding a CNT-containing resin into a sheet form. The sheet form can then be reheated in a thermoforming operation using heating methods (e.g., contact, IR, or convection), and then a pocket is formed using forming tools and dies by embossing, air pressure, or vacuum forming. The sheet form containing CNTs can also be extruded and directly cast onto a die, subsequently forming the carbon nanotube-containing carrier tape. These methods use carbon nanotubes in the range of 0.015% to approximately 3%.

[0052] In some embodiments, carbon nanotubes can be added in their original form during extrusion or as a premixed concentrated additive. Alternatively, carbon nanotubes can be compounded with other polymers by a resin supplier to be fed directly into the extruder during the manufacturing process. After extrusion, the resin containing CNTs can be dispersed throughout the carrier material or incorporated into specific layers, such as those used in the combination of layers in a multilayer product.

[0053] The surface resistivity of carrier targets, including carbon nanotubes, can typically be in the range of 1 × 10⁻⁶. 5 Up to 1×10 12 Within the range of Ω / sq, which is known to be the electrostatic dissipation range defined by the ANSI / ESD-S541 national standard, the level of carbon nanotubes is adjusted to meet the target value in the final product.

[0054] In alternative embodiments, the electrostatic shielding bag utilizes carbon nanotubes (CNTs) as a homogeneous material dispersed throughout the bag, or incorporated into one or more separate layers that can be laminated together to form a multilayer laminate. The electrostatic shielding bag typically has a total of 3 to 5 layers, with electrostatic dissipative layers on the inside and outside, and foil layers disposed between or within the electrostatic dissipative layers.

[0055] Carbon nanotubes (CNTs) provide more consistent and reproducible surface resistivity (SR) readings and are less affected by heating and processing cycles during the manufacture of laminated bag materials used as part of the electrostatic shielding bag. A smaller amount of CNTs (typically less than 3% CNTs vs. 10-15% carbon black) is added to the base material resin for the outer layer of the electrostatic shielding bag. The base material is typically polyester or polyethylene, but can be made from other polymers mixed with electrostatic dissipative compounds such as carbon nanotubes to acquire electrostatic dissipative properties. A CNT-loaded inner layer can also be used to replace a foil inner layer, allowing the electrostatic shielding bag to be more transparent or translucent. The translucent to transparent materials used in electrostatic shielding bags offer the advantage of allowing visual observation of the contents transported inside the bag during use and allowing individuals to read any labels located inside the bag. In some embodiments, an internal barcode located inside the electrostatic shielding bag using CNTs can be observed.

[0056] In some implementations, carbon nanotubes (CNTs) offer a higher aspect ratio (3000:1 to 6000:1 length / diameter ratio) compared to carbon black (due to its irregular shape from aggregation), thus providing more exposed surface area per volume of CNTs and making the CNT-containing material a more efficient conductor. Aspect ratio is the ratio of length to diameter. The higher aspect ratio of CNTs compared to carbon black results in a higher percentage of surface area. Carbon black typically also has overlapping aggregates, which further reduces the effective surface area. The surface area of ​​CNTs is 600-1000 m². 2 / g, while carbon black is 50-150m 2 / g. Therefore, compared to carbon black materials, the carrier tape or material layer used in electrostatic shielding bags formed with CNTs will be a more efficient conductor. Carbon nanotubes, including single-walled and multi-walled carbon nanotubes, can be used as conductive components within single polymer layers stacked together to form electrostatic shielding bags or carrier tapes.

[0057] In some embodiments, the manufacture of extruded or blown electrostatic shielding bags using CNTs can be achieved by adding carbon nanotubes in granular form to the extruder, the granular form using another or different polymer as a carrier. The carbon nanotubes can be mixed in various proportions depending on the percentage of CNTs in the masterbatch, based on the target final surface resistivity level of the electrostatic shielding bag, cap tape, or carrier tape. CNTs can also be premixed into the final resin, which can be fed directly into the extruder during the formation of the electrostatic shielding bag, cap tape, or carrier tape.

[0058] Electrostatic shielding bags can utilize carbon nanotubes within layers of the bag-forming material to provide electrostatic dissipation or conductivity. Carbon nanotubes can be incorporated into blown films or sheet extrusions, which can then be used as bag materials in homogeneous or multilayer laminates. Carbon nanotubes can also be added in their original form during extrusion or as a premixed concentrated additive.

[0059] Electrostatic shielding bags can be used to protect individually packaged sensitive components, electronic parts and equipment, or multiple components or equipment in bulk containers, belts and reels, pallets or other packages. The size of the electrostatic shielding bag can be precisely matched to the items being packaged. Electrostatic shielding bags can be vacuum-sealed to remove air before heat sealing and to transport items inside the bag. Alternatively, electrostatic shielding bags can be sealed mechanically or with adhesive. Alternatively, the air can be replaced with an inert gas before sealing the electrostatic shielding bag to reduce the possibility of corrosion due to condensation during exposure to temperature changes.

[0060] In some implementations, the target surface resistivity of the material using CNTs can typically be in the range of 1 × 10⁻⁶. 5 Up to 1×10 10 Within the range of Ω / sq, and the level of CNT is adjusted to meet the target value of surface resistivity in the final product.

[0061] The capping tape can utilize carbon nanotubes to achieve the electrostatic dissipation or conductivity of thermally activated adhesives by mixing carbon nanotubes into the adhesive and coating the base film, or it can be used as a premixed carrier material to be mixed with thermally activated adhesives before coating.

[0062] The base film of the cover strip can be formed using carbon nanotubes premixed in a compatible carrier that can be added together with the base material, or it can be compounded with carbon nanotubes during the formation of the base film for direct input into the extruder.

[0063] The sealant material of the cover strip can be directly mixed with carbon nanotubes, premixed, or mixed through direct compounding.

[0064] Surface resistivity targets can typically be in the range of 1×10⁻⁶. 5 Up to 1×10 10 Within the range of Ω / sq, adjust the level of CNT to meet the target value in the final product.

[0065] Example

[0066] Example 1: A carrier belt with multiple aligned pockets is formed by using the following method: Carbon nanotubes have single walls, and each carbon nanotube has a diameter of approximately 20 nm. With 750m 2 / g surface area of ​​carbon nanotubes; Carbon nanotubes have an aspect ratio of 450:1; Carbon nanotubes are added as a raw material to the base material before extrusion; For the formed carrier, carbon nanotubes account for approximately 0.1% by weight of the material; The base material constitutes the carrier tape formed by the following weight percentages: Polycarbonate (PC) (99.90%) The surface resistivity of the resulting carrier tape is 1×10⁻⁶. 12 ; The resulting carrier tape has a light transmittance of 80%. The resulting carrier tape has a haze value of 50.5; The resulting carrier tape has a transparency value of 26; and The surface defects (such as debris) formed on the carrier tape are reduced to 0%; The resulting carrier tape exhibits reduced high-density entanglement or coalescence accumulation, with a measured value of 0%; and The resulting carrier belt exhibited minimal carbon material transfer (collapse), with a measured value of 0%.

[0067] Example 2: A carrier belt with multiple aligned pockets is formed by using the following method: Carbon nanotubes have double or multiple walls, and each wall of a carbon nanotube has a wall spacing dimension of about 0.3 nm. Each carbon nanotube has a diameter of approximately 50 nm; With 600m 2 / g surface area of ​​carbon nanotubes; Carbon nanotubes have an aspect ratio of 3000:1; Carbon nanotubes are added to the base material as a pre-mixed concentrated additive prior to extrusion; For the formed carrier tape, the pre-mixed resin containing carbon nanotubes accounts for approximately 2.5% by weight of the material; For the formed carrier, carbon nanotubes account for approximately 0.25% by weight of the material; The base material constitutes the carrier tape formed by the following weight percentages: Polycarbonate (PC) (97.5%) The surface resistivity of the resulting carrier tape is 1×10⁻⁶. 8 ; The resulting carrier tape has a light transmittance of 10%. The surface defects (such as debris) formed on the carrier tape are reduced to 0%; The resulting carrier tape exhibits reduced high-density entanglement or coalescence accumulation, with a measured value of 0%; and The resulting carrier belt exhibited minimal carbon material transfer (collapse), with a measured value of 0%.

[0068] Example 3: A carrier belt with multiple aligned pockets is formed by using the following method: Carbon nanotubes have single walls, and each carbon nanotube has a diameter of approximately 10 nm. With 850m 2 / g surface area of ​​carbon nanotubes; Carbon nanotubes have an aspect ratio of 5500:1; Carbon nanotubes are added as a raw material to the base material before extrusion; For the formed carrier, carbon nanotubes account for approximately 0.2% by weight of the material; The base material constitutes the carrier tape formed by the following weight percentages: Linear low-density polyethylene (LLDPE) (19.8%). Acrylonitrile butadiene styrene (ABS) (80%) The surface resistivity of the resulting carrier tape is 1×10⁻⁶. 10 ; The resulting carrier tape has a light transmittance of 84%. The resulting carrier tape has a haze value of 59.5; The resulting carrier tape has a transparency value of 26; The surface defects (such as debris) formed on the carrier tape are reduced to a value of zero (0); The resulting carrier tape exhibits reduced high-density entanglement or coalescence accumulation, with a measured value of 0%; and The resulting carrier belt exhibited minimal carbon material transfer (collapse), with a measured value of 0%.

[0069] Example 4: A carrier belt with multiple aligned pockets is formed by using the following method: Carbon nanotubes have single walls, and each carbon nanotube has a diameter of approximately 60 nm. With 750m 2 / g surface area of ​​carbon nanotubes; Carbon nanotubes have an aspect ratio of 6000:1; Carbon nanotubes are added as a raw material to the base material before extrusion; For the formed carrier, carbon nanotubes account for approximately 0.25% by weight of the material; The base material constitutes the carrier tape formed by the following weight percentages: Linear low-density polyethylene (LLDPE) (19.75%). Styrene-acrylonitrile (SAN) (80%) The surface resistivity of the resulting carrier tape is 1×10⁻⁶.11 ; The resulting carrier tape has a light transmittance of 81%. The resulting carrier tape has a haze value of 69.5; The resulting carrier tape has a transparency value of 34; The surface defects (such as debris) formed on the carrier tape are reduced to a value of 0%. The resulting carrier tape exhibits reduced high-density entanglement or coalescence accumulation, with a measured value of 0%; and The resulting carrier belt exhibited minimal carbon material transfer (collapse), with a measured value of 0%.

[0070] Example 5: The electrostatic dissipation carrier bag is formed in the following manner: Carbon nanotubes have single walls, and each carbon nanotube has a diameter of approximately 23 nm. With 750m 2 / g average surface area of ​​carbon nanotubes; Carbon nanotubes have an aspect ratio of 4500:1; Carbon nanotubes are added as a raw material to the base material before being extruded into sheets; For the dissipative bags formed, carbon nanotubes account for approximately 0.2% of the material; The base materials constitute the electrostatic dissipation carrier bag in the following percentages: Linear low-density polyethylene (LLDPE) (99.80%) The surface resistivity of the formed electrostatic dissipation carrier bag is 1×10⁻⁶. 10 ; The resulting electrostatic dissipation carrier bag has a light transmittance value of 80. The resulting electrostatic dissipation carrier bag has a haze value of 80%. The resulting electrostatic dissipation carrier bag has a transparency value of 54; The surface defects (such as fragments) of the formed electrostatic dissipative carrier bag are reduced to 0%; The formed electrostatic dissipative carrier bag exhibits reduced high-density entanglement or coalescence accumulation, with a measured value of 0%; and The resulting electrostatic dissipation carrier bag exhibited minimal carbon material transfer (collapse), with a measured value of 0%.

[0071] Example 6: The electrostatic dissipation carrier bag is formed in the following manner: Carbon nanotubes have multiple walls, with a wall spacing of approximately 34 nm. Each carbon nanotube has a diameter of approximately 45 nm; With 1000m 2 / g average surface area of ​​carbon nanotubes; Carbon nanotubes have an aspect ratio of 3000:1; Carbon nanotubes were added to the base material as a pre-mixed concentrated additive before blowing the electrostatic dissipative carrier bag. For blown electrostatic dissipative carrier bags, carbon nanotubes account for approximately 2.0% of the material; The base materials constitute the following percentages of the blown electrostatic dissipative carrier bag: Polyethylene terephthalate (PET) (48.00%) Linear low-density polyethylene (LLDPE) (50%) The surface resistivity of the blown electrostatic dissipative carrier bag is 1×10⁻⁶. 10 ; The blown electrostatic dissipative carrier bag has a light transmittance of 60%. The blown electrostatic dissipative carrier bag has a haze value of 60%; The blown electrostatic dissipative carrier bag has a transparency value of 30%; Surface defects (such as fragments) in blown electrostatic dissipative carrier bags are reduced to 0%; The blown electrostatic dissipative carrier bag exhibits reduced high-density entanglement or coalescence accumulation, with a measured value of 0%; and The blown electrostatic dissipative carrier bag has a low carbon material transfer (collapse) measurement of 0%.

[0072] Example 7: The electrostatic dissipation carrier bag is formed in the following manner: Carbon nanotubes have single walls with a diameter of approximately 20 nm; With 850m 2 / g average surface area of ​​carbon nanotubes; Carbon nanotubes have an aspect ratio of 5500; Carbon nanotubes are added as a raw material to the base material before being extruded into sheets; For the formed antistatic capping tape, carbon nanotubes account for approximately 0.3% of the material; The base materials constitute the electrostatic dissipation carrier bag in the following percentages; Biaxially oriented polyethylene terephthalate (BO-PET) (39.85%) The intermediate materials constitute the electrostatic dissipation carrier bag in the following percentages; Ethylene-vinyl acetate copolymer (EVA) (40.00%) The sealant material constitutes the following percentage of the electrostatic dissipation carrier bag; Ethylene-vinyl acetate copolymer (EVA) + polyurethane-based resin (PU) + polyethylene resin (PE) (39.85%). The surface resistivity of the formed electrostatic dissipation carrier bag is 1×10⁻⁶. 10 ; The resulting carrier tape has a light transmittance of 74%. The resulting carrier tape has a haze value of 60.5; and The resulting carrier tape has a transparency value of 20.

[0073] Example 8: The electrostatic dissipation carrier bag is formed using the following materials: Carbon nanotubes have single walls with a diameter of approximately 20 nm; With 900m 2 / g average surface area of ​​carbon nanotubes; Carbon nanotubes have an aspect ratio of 5000:1; Carbon nanotubes are added as a raw material to the base material before being extruded into sheets; For the formed antistatic capping tape, carbon nanotubes account for approximately 0.4% of the material; The base materials constitute the electrostatic dissipation carrier bag in the following percentages; Biaxially oriented polyethylene terephthalate (BO-PET) (39.80%) The intermediate materials constitute the electrostatic dissipation carrier bag in the following percentages; Polypropylene (PP) (40.00%) The sealant material constitutes the following percentage of the electrostatic dissipation carrier bag; Polypropylene (PP), + polyurethane-based resin (PU) + polyethylene resin (PE) (39.85%). The surface resistivity of the formed electrostatic dissipation carrier bag is 1×10⁻⁶. 9 ; The resulting carrier tape has a light transmittance of 84%. The resulting carrier tape has a haze value of 60.5; and The resulting carrier tape has a transparency value of 20.

[0074] In a first alternative embodiment, the carrier tape includes a plurality of aligned pockets configured and arranged for transporting electronic components. The carrier tape is formed of a material comprising a polymer (0.99% to 99% by weight of the material) and carbon nanotubes (0.01% to 3% by weight of the material).

[0075] In a second alternative embodiment according to the first alternative embodiment, the carbon nanotubes are selected from single-walled carbon nanotubes, double-walled carbon nanotubes, and triple-walled or multi-walled carbon nanotubes and combinations thereof.

[0076] In a third alternative embodiment according to the second alternative embodiment, the wall spacing between adjacent walls of double-walled carbon nanotubes and triple-walled or more-walled carbon nanotubes is 0.20 nm to 0.34 nm.

[0077] In a fourth alternative embodiment according to the second alternative embodiment, each carbon nanotube has a diameter of 1 nm to 100 nm.

[0078] In the fifth alternative embodiment according to the second alternative embodiment, the surface area of ​​each carbon nanotube is 600 m². 2 / g to 1000m 2 / g.

[0079] In a sixth alternative embodiment according to the second alternative embodiment, the carbon nanotubes have an aspect ratio of 3000:1 to 6000:1.

[0080] In a seventh alternative embodiment according to the first alternative embodiment, carbon nanotubes are added to the polymer as a raw carbon nanotube material before extruding the carrier tape, cover tape, or electrostatic dissipative bag.

[0081] In an eighth alternative embodiment according to the first alternative embodiment, the polymer is selected from polycarbonate (PC), acrylonitrile butadiene styrene (ABS), polypropylene (PP), polystyrene (PS), polyethylene terephthalate (PET), high-density polyethylene (HDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), styrene-acrylonitrile (SAN), polyethylene (PE), polyester (PETE), and combinations thereof.

[0082] In the ninth alternative embodiment according to the first alternative embodiment, the carrier belt has a 1×10 5 and 1×10 12 The range of electrostatic dissipation measured between Ω / sq.

[0083] In the tenth alternative embodiment according to the second alternative embodiment, the carrier tape has a light transmittance value of 60% to 90%.

[0084] In the eleventh alternative embodiment according to the tenth alternative embodiment, the carrier tape has a haze value of 60% to 70%.

[0085] In the twelfth alternative embodiment according to the eleventh alternative embodiment, the carrier tape has a transparency value of 25% to 45%.

[0086] In the thirteenth alternative embodiment according to the second alternative embodiment, the carrier tape has a measured value of less than or equal to 10% surface defects.

[0087] In the fourteenth alternative embodiment according to the second alternative embodiment, the carrier tape has a measured high-density entanglement of less than or equal to 5%.

[0088] In the fifteenth alternative embodiment according to the second alternative embodiment, the carrier tape has a coalescence measurement of less than or equal to 5%.

[0089] In the sixteenth alternative embodiment according to the second alternative embodiment, the carrier belt has a measured value of less than or equal to 1% carbon material transfer (collapse).

[0090] In a seventeenth alternative embodiment according to the first alternative embodiment, the carrier tape further includes a cover tape having a heat-activated adhesive or a pressure-sensitive adhesive, and the cover tape having at least one layer formed of a polymer and carbon nanotubes.

[0091] In the eighteenth alternative embodiment, the cover tape is formed of an extended tape portion formed of a material comprising a polymer and carbon nanotubes, wherein the polymer comprises 0.99% to 99% of the material by weight and the carbon nanotubes comprise 0.01% to 3% of the material by weight, wherein the extended tape portion is configured and arranged to be bonded to the carrier tape by thermal activation or pressure activation.

[0092] In a nineteenth alternative embodiment, the antistatic bag is formed of multiple layers joined together in a stacked relationship, the antistatic bag being constructed and arranged for the transport of electronic components, at least one of the multiple layers being formed of a material comprising a polymer and carbon nanotubes, the polymer comprising 0.99% to 99% of the weight of the material, and the carbon nanotubes comprising 0.01% to 3% of the weight of the material.

[0093] U.S. Patent Publication US20080085405A1 is incorporated herein by reference in its entirety. The following publications are also incorporated herein by reference in their entirety.

[0094] "Efficient coating of transparent and conductive carbon nanotube thin films on plastic substrates," MH Andrew Ng, Lysia T Hartadi, Huiwen Tan, and CH Patrick Poa, published April 15, 2008. IOP Publishing Ltd, Nanotechnology, Volume 19, Issue 20.

[0095] This completes the description of preferred and alternative embodiments of the invention. Those skilled in the art will recognize other equivalents of the specific embodiments described herein, which are covered by the appended claims.

[0096] The above disclosure is intended to be illustrative and not exhaustive. This description will give rise to many variations and alternatives for those skilled in the art. The various elements shown in the figures and described above can be combined or modified as needed. All such alternatives and variations are intended to be included within the scope of the claims, wherein the term "comprising" means "including but not limited to".

[0097] These and other embodiments characterizing the invention are specifically pointed out in the appended claims and constitute a part of the invention. However, for a further understanding of the invention, and for the advantages and purposes obtained by using it, reference should be made to the accompanying drawings and descriptions that form another part of the invention, in which embodiments of the invention are shown and described.

Claims

1. A carrier tape comprising: Multiple aligned pockets, configured and arranged for transporting electronic components, the carrier tape being formed of a material comprising a polymer and carbon nanotubes, the polymer comprising 0.99% to 99% of the material by weight, and the carbon nanotubes comprising 0.01% to 3% of the material by weight, the carbon nanotubes having an aspect ratio of 3000:1 to 6000:

1. The carbon nanotubes are selected from double-walled carbon nanotubes and triple-walled or more-walled carbon nanotubes and combinations thereof. The spacing between adjacent walls of the double-walled carbon nanotubes and triple-walled or more-walled carbon nanotubes is from 0.20 nm to 0.34 nm. The polymer is selected from polycarbonate (PC), acrylonitrile butadiene styrene (ABS), polystyrene (PS), styrene-acrylonitrile (SAN), and combinations thereof. The carrier belt has a size of 1×10 5 Up to 1×10 12 The range of electrostatic dissipation measured in Ω / sq.

2. The carrier tape of claim 1, wherein each of the carbon nanotubes has a diameter of 1 nm to 100 nm.

3. The carrier tape of claim 1, wherein each of the carbon nanotubes has a surface area of ​​600 μm. 2 / g to 1000m 2 / g.

4. The carrier tape of claim 1, wherein the carbon nanotubes are added to the polymer as a pristine carbon nanotube material prior to extruding the carrier tape.

5. The carrier tape as claimed in claim 1, wherein the light transmittance of the carrier tape is 60% to 90%.

6. The carrier tape of claim 5, wherein the haze value of the carrier tape is 60% to 70%.

7. The carrier tape of claim 6, wherein the transparency value of the carrier tape is 25% to 45%.

8. The carrier tape of claim 1, wherein the carrier tape has a measured surface defect value of less than or equal to 10%.

9. The carrier tape of claim 1, wherein the carrier tape has a measured high-density entanglement value of less than or equal to 5%.

10. The carrier tape of claim 1, wherein the carrier tape has a measured coalescence value of less than or equal to 5%.

11. The carrier tape of claim 1, wherein the carrier tape has a measured carbon material transfer (collapse) value of less than or equal to 1%.

12. The carrier tape of claim 1, further comprising a cover tape comprising a thermally activated adhesive or a pressure-sensitive adhesive, the cover tape comprising at least one layer formed of the polymer and the carbon nanotubes.

13. A cover strip comprising: An extended strip portion, said extended strip portion being formed of a material comprising a polymer and carbon nanotubes, said polymer comprising 0.99% to 99% by weight of said material, and said carbon nanotubes comprising 0.01% to 3% by weight of said material, wherein said extended strip portion is configured and arranged to be bonded to a carrier tape by thermal activation or pressure activation, said carbon nanotubes having an aspect ratio of 3000:1 to 6000:

1. The carbon nanotubes are selected from double-walled carbon nanotubes and triple-walled or more-walled carbon nanotubes and combinations thereof. The spacing between adjacent walls of the double-walled carbon nanotubes and triple-walled or more-walled carbon nanotubes is from 0.20 nm to 0.34 nm. The polymer is selected from polycarbonate (PC), acrylonitrile butadiene styrene (ABS), polystyrene (PS), styrene-acrylonitrile (SAN), and combinations thereof. The carrier belt has a size of 1×10 5 Up to 1×10 12 The range of electrostatic dissipation measured in Ω / sq.

14. An electrostatic dissipation bag, comprising: The antistatic bag comprises multiple layers joined together in a stacked relationship, configured and arranged for the transport of electronic components. At least one of the layers is formed of a material comprising a polymer and carbon nanotubes, wherein the polymer comprises 0.99% to 99% of the material by weight, and the carbon nanotubes comprise 0.01% to 3% of the material by weight, the carbon nanotubes having an aspect ratio of 3000:1 to 6000:

1. The carbon nanotubes are selected from double-walled carbon nanotubes and triple-walled or more-walled carbon nanotubes and combinations thereof. The spacing between adjacent walls of the double-walled carbon nanotubes and triple-walled or more-walled carbon nanotubes is from 0.20 nm to 0.34 nm. The polymer is selected from polycarbonate (PC), acrylonitrile butadiene styrene (ABS), polystyrene (PS), styrene-acrylonitrile (SAN), and combinations thereof. The layer has a 1×10 5 Up to 1×10 12 The range of electrostatic dissipation measured in Ω / sq.

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