CN110791179A - Special antistatic coating for cover tape - Google Patents
Special antistatic coating for cover tape Download PDFInfo
- Publication number
- CN110791179A CN110791179A CN201810869563.2A CN201810869563A CN110791179A CN 110791179 A CN110791179 A CN 110791179A CN 201810869563 A CN201810869563 A CN 201810869563A CN 110791179 A CN110791179 A CN 110791179A
- Authority
- CN
- China
- Prior art keywords
- antistatic coating
- cover tape
- special
- antistatic
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011248 coating agent Substances 0.000 title claims abstract description 30
- 238000000576 coating method Methods 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000000080 wetting agent Substances 0.000 claims abstract description 17
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 239000011347 resin Substances 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 229920000172 poly(styrenesulfonic acid) Polymers 0.000 claims abstract description 3
- 229940005642 polystyrene sulfonic acid Drugs 0.000 claims abstract description 3
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 16
- 239000004816 latex Substances 0.000 claims description 16
- 229920000126 latex Polymers 0.000 claims description 16
- 239000002174 Styrene-butadiene Substances 0.000 claims description 8
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 8
- 239000011115 styrene butadiene Substances 0.000 claims description 8
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 8
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 6
- -1 acetylene glycol ethoxy compound Chemical class 0.000 claims description 5
- KVNRLNFWIYMESJ-UHFFFAOYSA-N butyronitrile Chemical compound CCCC#N KVNRLNFWIYMESJ-UHFFFAOYSA-N 0.000 claims description 4
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 2
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 2
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 claims description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 2
- 239000000600 sorbitol Substances 0.000 claims description 2
- 150000003568 thioethers Chemical class 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 239000004014 plasticizer Substances 0.000 claims 1
- 238000003756 stirring Methods 0.000 description 9
- 239000002216 antistatic agent Substances 0.000 description 6
- OCKPCBLVNKHBMX-UHFFFAOYSA-N butylbenzene Chemical compound CCCCC1=CC=CC=C1 OCKPCBLVNKHBMX-UHFFFAOYSA-N 0.000 description 6
- 238000007731 hot pressing Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000004831 Hot glue Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 229920000123 polythiophene Polymers 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004100 electronic packaging Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D165/00—Coating compositions based on macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Packaging Frangible Articles (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses an antistatic coating special for a cover tape, which comprises the following raw material components in percentage by mass: 10-50% of Poly (3,4-ethylenedioxythiophene) -polystyrene sulfonic acid (Poly (3,4-ethylenedioxythiophene)/Poly (PEDOT/PSS)), 0.05-1.5% of wetting agent, 2-15% of water-based resin, 1-15% of active synergist, 0.05-3% of slipping agent and 50-70% of water, wherein the total content of the components is 100%.
Description
Technical Field
The invention relates to an antistatic coating, in particular to an antistatic coating special for an upper cover tape for packaging electronic parts.
Background
The cover tape is a strip product applied to the field of electronic packaging and is matched with a carrier tape for use. The cover tape usually uses a polyester or polypropylene film as a base layer, and is compounded or coated with different functional layers (an antistatic layer, an adhesive layer, etc.), and can be sealed on the surface of the carrier tape under the condition of external force or heating to form a closed space to protect electronic components in pockets of the carrier tape. To prevent electronic components from being electrostatically attracted to the cover tape, the surface of the cover tape is often antistatic. Polymeric antistatic agents are often added to the coating of cover tapes. However, these ionic antistatic agents act by adsorbing water, are greatly affected by air humidity, and have a short antistatic effect.
Aqueous polythiophene (PEDOT/PSS) antistatic agents are novel antistatic agents and do not rely on air humidity. The water-based resin adopted by the common polythiophene antistatic coating comprises polyurethane, acrylic resin, acrylic modified polyurethane and the like. The aqueous resins have good compatibility with polythiophene, good adhesive force and film-forming property on the film, and endow the film with stable and durable antistatic property. However, when the antistatic agent is coated on the surface of the cover tape, the resin layer reduces the adhesive force between the hot melt adhesive of the cover tape and the carrier tape, so that vibration can be generated when the cover tape is peeled off, the stability of the carrier tape is affected, and electronic components are easy to jump out.
The key to solve the problem is to find the water-based resin with good compatibility with the hot melt adhesive of the cover tape. The styrene-butadiene latex is polymer latex prepared by emulsion copolymerization of butadiene and styrene monomers after adding different chemicals and auxiliaries. The styrene-butadiene latex has the characteristics of good conjunctival strength, good binding power, good stability and fluidity, large filling amount, good moldability, excellent mechanical, chemical and freeze-thaw stability, good compatibility with pigment and filler and the like. The styrene-butadiene latex is selected to replace polyurethane and the like, and a proper wetting agent is selected in the coating formula, so that the coating can be uniformly coated on the surface of the cover tape, and the antistatic agent which has lasting antistatic effect and low humidity dependence and does not influence the bonding effect between the hot melt adhesive layer of the cover tape and the carrier tape can be obtained.
Disclosure of Invention
The invention provides an antistatic coating special for an upper cover tape for packaging electronic components according to different application purposes, which overcomes the defects in the prior art. The antistatic coating has a good antistatic effect and low humidity dependence, and can well slow down the vibration generated when the upper cover tape is stripped, so that the stability of the carrier tape is kept.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the antistatic coating special for the upper cover tape for packaging the electronic components comprises the following raw material components in percentage by mass: 10-50% of Poly (3,4-ethylenedioxythiophene) -polystyrene sulfonic acid (Poly (3,4-ethylenedioxythiophene)/Poly (PEDOT/PSS)), 0.05-1.5% of wetting agent, 2-15% of water-based resin, 1-15% of active synergist, 0.05-3% of slipping agent and 50-70% of water, wherein the total content of the components is 100%.
In the present invention, the wetting agent is preferably one of thioether nonionic super wetting agents and acetylene glycol ethoxy compound nonionic super wetting agents.
In the invention, the preferable scheme is that the water-based resin is one of butylbenzene latex and butyronitrile latex
In the invention, the preferable scheme is that the active synergist is one of dimethyl sulfoxide, N-methyl pyrrolidone, sorbitol and glycerol.
In the invention, the preferable scheme is that the slipping agent is a polydimethylsiloxane dispersion with a super molecular weight, and is preferably Dow Corning DC-51.
Compared with the prior art, the invention has the beneficial effects that: according to the antistatic coating special for the cover tape, styrene butadiene latex or butyronitrile latex is selected as bonding resin in the formula components, and a proper wetting agent is matched, so that after the antistatic layer is coated on the surface of the cover tape, the vibration generated when the upper cover tape is stripped can be well slowed down, and the stripping stability of the carrier tape is kept.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following describes technical solutions in the embodiments of the present invention clearly and completely in combination with the embodiments of the present invention. The described embodiments are only some, but not all embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the special antistatic coating for the cover tape comprises the following raw material components in percentage by mass: 20 g of PEDOT/PSS (solid content is 1.3%), 0.5 g of Dynol 604 wetting agent, 10 g of butylbenzene latex (solid content is 30%), 5 g of dimethyl sulfoxide, 0.1 g of Dow Corning DC-51 slipping agent and 64.4 g of water.
And adding PEDOT/PSS into water, fully stirring for 10 minutes, adding a Dynol 604 wetting agent and styrene-butadiene latex into the solution, fully stirring for 15 minutes, adding dimethyl sulfoxide and Dow Corning DC-51 slipping agent into the mixed solution, and fully stirring uniformly for 2 hours to obtain the special antistatic coating for the cover tape. Coating the mixture on the surface of the cover tape with a No. 5 wire bar, drying at 110 ℃, and measuring the antistatic property and the influence on the hot pressing property.
The antistatic performance of the formula is 106Omega/□, and the tensile force influence test after hot pressing at 180 ℃ for 0.05 second shows that the cover tape is free of vibration during stripping, and can keep the stripping smoothness of the carrier tape.
Example 2:
the special antistatic coating for the cover tape comprises the following raw material components in percentage by mass: 27 g of PEDOT/PSS (solid content: 1.3%), 0.4 g of Dynol 604 wetting agent, 8 g of butyronitrile latex (solid content: 30%), 4 g of dimethyl sulfoxide, 0.1 g of Dow Corning DC-51 slipping agent and 60.5 g of water.
And adding PEDOT/PSS into water, fully stirring for 10 minutes, adding a Dynol 604 wetting agent and styrene-butadiene latex into the solution, fully stirring for 15 minutes, adding dimethyl sulfoxide and Dow Corning DC-51 slipping agent into the mixed solution, and fully stirring uniformly for 2 hours to obtain the special antistatic coating for the cover tape. Coating the mixture on the surface of the cover tape with a No. 5 wire bar, drying at 110 ℃, and measuring the antistatic property and the influence on the hot pressing property.
The antistatic performance of the formula is 106Omega/□, and the tensile force influence test after hot pressing at 180 ℃ for 0.05 second shows that the cover tape is free of vibration during stripping, and can keep the stripping smoothness of the carrier tape.
Example 3:
the special antistatic coating for the cover tape comprises the following raw material components in percentage by mass: 21 g of PEDOT/PSS (solid content: 1.3%), 0.6 g of Dynol 604 wetting agent, 11.5 g of butylbenzene latex (solid content: 30%), 5.5 g of dimethyl sulfoxide, 0.2 g of Dow Corning DC-51 slipping agent and 61.5 g of water.
And adding PEDOT/PSS into water, fully stirring for 10 minutes, adding a Dynol 604 wetting agent and styrene-butadiene latex into the solution, fully stirring for 15 minutes, adding dimethyl sulfoxide and Dow Corning DC-51 slipping agent into the mixed solution, and fully stirring uniformly for 2 hours to obtain the special antistatic coating for the cover tape. Coating the mixture on the surface of the cover tape with a No. 5 wire bar, drying at 110 ℃, and measuring the antistatic property and the influence on the hot pressing property.
The antistatic performance of the formula is 106Omega/□, and the tensile force influence test after hot pressing at 180 ℃ for 0.05 second shows that the cover tape is free of vibration during stripping, and can keep the stripping smoothness of the carrier tape.
The applicant states that the present invention is illustrated in detail by the above examples, but the present invention is not limited to the above detailed methods, i.e. it is not meant that the present invention must rely on the above detailed methods for its implementation. It should be understood by those skilled in the art that any modification of the present invention, effective substitution of raw materials and addition of auxiliary components to the product of the present invention, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (5)
1. The special antistatic coating for the cover tape is characterized in that: the material is prepared from the following raw materials in percentage by mass: 10-50% of Poly (3,4-ethylenedioxythiophene) -polystyrene sulfonic acid (Poly (3,4-ethylenedioxythiophene)/Poly (PEDOT/PSS)), 0.05-1.5% of wetting agent, 2-15% of water-based resin, 1-15% of active plasticizer, 0.05-3% of slipping agent and 50-70% of water, wherein the total content of the components is 100%.
2. The antistatic coating special for the cover tape according to claim 1, wherein the antistatic coating comprises: the water-based resin is one of styrene-butadiene latex or butyronitrile latex.
3. The antistatic coating special for the cover tape according to claim 1, wherein the antistatic coating comprises: the wetting agent is one of thioether nonionic super wetting agents and acetylene glycol ethoxy compound nonionic super wetting agents.
4. The antistatic coating special for the cover tape according to claim 1, wherein the antistatic coating comprises: the active synergist is one of dimethyl sulfoxide, N-methyl pyrrolidone, sorbitol and glycerol.
5. The antistatic coating special for the cover tape according to claim 1, wherein the antistatic coating comprises: the slipping agent is a polydimethylsiloxane dispersion with a super molecular weight, and preferably Dow Corning DC-51.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810869563.2A CN110791179A (en) | 2018-08-02 | 2018-08-02 | Special antistatic coating for cover tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810869563.2A CN110791179A (en) | 2018-08-02 | 2018-08-02 | Special antistatic coating for cover tape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110791179A true CN110791179A (en) | 2020-02-14 |
Family
ID=69425181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810869563.2A Pending CN110791179A (en) | 2018-08-02 | 2018-08-02 | Special antistatic coating for cover tape |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110791179A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114133709A (en) * | 2021-11-30 | 2022-03-04 | 浙江洁美电子科技股份有限公司 | Conductive sheet and carrier tape for micro package |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1409666A (en) * | 1999-12-16 | 2003-04-09 | 咨询卡有限公司 | Printed substrate made by transfer of ink jet printed image from printable transfer film |
| JP2004058648A (en) * | 2001-12-06 | 2004-02-26 | Toray Ind Inc | Laminated film and manufacturing process thereof |
| JP2010196022A (en) * | 2009-02-27 | 2010-09-09 | Nagase Chemtex Corp | Electroconductive coating composition |
| CN104960292A (en) * | 2015-06-17 | 2015-10-07 | 浙江洁美电子科技股份有限公司 | Packaging tape for carrier belt for electronic components and production method of packaging tape |
-
2018
- 2018-08-02 CN CN201810869563.2A patent/CN110791179A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1409666A (en) * | 1999-12-16 | 2003-04-09 | 咨询卡有限公司 | Printed substrate made by transfer of ink jet printed image from printable transfer film |
| JP2004058648A (en) * | 2001-12-06 | 2004-02-26 | Toray Ind Inc | Laminated film and manufacturing process thereof |
| JP2010196022A (en) * | 2009-02-27 | 2010-09-09 | Nagase Chemtex Corp | Electroconductive coating composition |
| CN104960292A (en) * | 2015-06-17 | 2015-10-07 | 浙江洁美电子科技股份有限公司 | Packaging tape for carrier belt for electronic components and production method of packaging tape |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114133709A (en) * | 2021-11-30 | 2022-03-04 | 浙江洁美电子科技股份有限公司 | Conductive sheet and carrier tape for micro package |
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Application publication date: 20200214 |
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