JP6714631B2 - 電磁波シールドフィルム及びシールドプリント配線板 - Google Patents
電磁波シールドフィルム及びシールドプリント配線板 Download PDFInfo
- Publication number
- JP6714631B2 JP6714631B2 JP2018048087A JP2018048087A JP6714631B2 JP 6714631 B2 JP6714631 B2 JP 6714631B2 JP 2018048087 A JP2018048087 A JP 2018048087A JP 2018048087 A JP2018048087 A JP 2018048087A JP 6714631 B2 JP6714631 B2 JP 6714631B2
- Authority
- JP
- Japan
- Prior art keywords
- electromagnetic wave
- shield
- film
- wave shielding
- adhesive layer
- 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.)
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- 239000012790 adhesive layer Substances 0.000 claims description 97
- 239000010410 layer Substances 0.000 claims description 94
- 229910052751 metal Inorganic materials 0.000 claims description 39
- 239000002184 metal Substances 0.000 claims description 39
- 239000011888 foil Substances 0.000 claims description 28
- 239000011231 conductive filler Substances 0.000 claims description 21
- 239000004840 adhesive resin Substances 0.000 claims description 14
- 229920006223 adhesive resin Polymers 0.000 claims description 14
- 238000005452 bending Methods 0.000 claims description 3
- 239000010408 film Substances 0.000 description 183
- 239000011342 resin composition Substances 0.000 description 35
- 239000000203 mixture Substances 0.000 description 25
- 239000002245 particle Substances 0.000 description 23
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 22
- 239000000463 material Substances 0.000 description 20
- 239000003063 flame retardant Substances 0.000 description 19
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 16
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 14
- 229920005989 resin Polymers 0.000 description 14
- 239000011347 resin Substances 0.000 description 14
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 13
- 229910052802 copper Inorganic materials 0.000 description 12
- 239000010949 copper Substances 0.000 description 12
- 229910052709 silver Inorganic materials 0.000 description 12
- 239000004332 silver Substances 0.000 description 12
- -1 polypropylene Polymers 0.000 description 10
- 239000013039 cover film Substances 0.000 description 9
- 239000000945 filler Substances 0.000 description 9
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 8
- 239000003822 epoxy resin Substances 0.000 description 8
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 8
- 229910052737 gold Inorganic materials 0.000 description 8
- 239000010931 gold Substances 0.000 description 8
- 229920000647 polyepoxide Polymers 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 7
- 229920005992 thermoplastic resin Polymers 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 6
- 229920001187 thermosetting polymer Polymers 0.000 description 6
- 229920000178 Acrylic resin Polymers 0.000 description 5
- 239000004925 Acrylic resin Substances 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 5
- 229920000877 Melamine resin Polymers 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 5
- 239000011651 chromium Substances 0.000 description 5
- 150000003949 imides Chemical class 0.000 description 5
- 229910017464 nitrogen compound Inorganic materials 0.000 description 5
- 150000002830 nitrogen compounds Chemical class 0.000 description 5
- 229920001155 polypropylene Polymers 0.000 description 5
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 5
- 229910052719 titanium Inorganic materials 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 229910052725 zinc Inorganic materials 0.000 description 5
- 239000011701 zinc Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 4
- 229920000180 alkyd Polymers 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000005011 phenolic resin Substances 0.000 description 4
- 229920001225 polyester resin Polymers 0.000 description 4
- 239000004645 polyester resin Substances 0.000 description 4
- 229920013716 polyethylene resin Polymers 0.000 description 4
- 229920001721 polyimide Polymers 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000004640 Melamine resin Substances 0.000 description 3
- 150000001408 amides Chemical class 0.000 description 3
- 229920006351 engineering plastic Polymers 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 239000009719 polyimide resin Substances 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- 239000004693 Polybenzimidazole Substances 0.000 description 1
- 239000004697 Polyetherimide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 150000001639 boron compounds Chemical class 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- ZQKXQUJXLSSJCH-UHFFFAOYSA-N melamine cyanurate Chemical compound NC1=NC(N)=NC(N)=N1.O=C1NC(=O)NC(=O)N1 ZQKXQUJXLSSJCH-UHFFFAOYSA-N 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 150000002903 organophosphorus compounds Chemical class 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920002480 polybenzimidazole Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001601 polyetherimide Polymers 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
- H05K9/0084—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a single continuous metallic layer on an electrically insulating supporting structure, e.g. metal foil, film, plating coating, electro-deposition, vapour-deposition
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
- C09J9/02—Electrically-conducting adhesives
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
- H05K1/0218—Reduction of cross-talk, noise or electromagnetic interference by printed shielding conductors, ground planes or power plane
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
- H05K1/0218—Reduction of cross-talk, noise or electromagnetic interference by printed shielding conductors, ground planes or power plane
- H05K1/0224—Patterned shielding planes, ground planes or power planes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/002—Casings with localised screening
- H05K9/0039—Galvanic coupling of ground layer on printed circuit board [PCB] to conductive casing
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0064—Earth or grounding circuit
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Non-Metallic Protective Coatings For Printed Circuits (AREA)
- Structure Of Printed Boards (AREA)
- Laminated Bodies (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018048087A JP6714631B2 (ja) | 2018-03-15 | 2018-03-15 | 電磁波シールドフィルム及びシールドプリント配線板 |
TW107137515A TWI720356B (zh) | 2018-03-15 | 2018-10-24 | 電磁波屏蔽膜及屏蔽印刷配線板 |
CN201910156490.7A CN110278701A (zh) | 2018-03-15 | 2019-03-01 | 电磁波屏蔽膜以及屏蔽印制线路板 |
KR1020190029952A KR102423541B1 (ko) | 2018-03-15 | 2019-03-15 | 전자파 차폐 필름 및 차폐 프린트 배선판 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018048087A JP6714631B2 (ja) | 2018-03-15 | 2018-03-15 | 電磁波シールドフィルム及びシールドプリント配線板 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2019161101A JP2019161101A (ja) | 2019-09-19 |
JP6714631B2 true JP6714631B2 (ja) | 2020-06-24 |
Family
ID=67959016
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2018048087A Active JP6714631B2 (ja) | 2018-03-15 | 2018-03-15 | 電磁波シールドフィルム及びシールドプリント配線板 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP6714631B2 (zh) |
KR (1) | KR102423541B1 (zh) |
CN (1) | CN110278701A (zh) |
TW (1) | TWI720356B (zh) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI829973B (zh) * | 2020-02-25 | 2024-01-21 | 日商拓自達電線股份有限公司 | 電磁波屏蔽膜 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000223045A (ja) * | 1998-11-27 | 2000-08-11 | Matsushita Electronics Industry Corp | 陰極線管内蔵抵抗体および陰極線管 |
JP2001031943A (ja) * | 1999-07-26 | 2001-02-06 | Tomoegawa Paper Co Ltd | 半導体用接着剤及び半導体用接着テープ |
JP4201548B2 (ja) * | 2002-07-08 | 2008-12-24 | タツタ電線株式会社 | シールドフィルム、シールドフレキシブルプリント配線板及びそれらの製造方法 |
CN101657512B (zh) * | 2007-04-25 | 2014-05-28 | 日立化成株式会社 | 粘接片 |
JP2013145790A (ja) * | 2012-01-13 | 2013-07-25 | Hitachi Chemical Co Ltd | 屈曲配線板、部品実装屈曲配線板及びそれに用いる金属層付絶縁層 |
JP6061470B2 (ja) * | 2012-01-20 | 2017-01-18 | 旭化成株式会社 | フレキシブル配線板 |
JP2013193253A (ja) * | 2012-03-16 | 2013-09-30 | Yamaichi Electronics Co Ltd | 電磁シールド性カバーレイフィルム、フレキシブル配線板およびその製造方法 |
JP5934533B2 (ja) * | 2012-03-23 | 2016-06-15 | 富士フイルム株式会社 | 複層フィルム及び光学シート |
WO2015068611A1 (ja) * | 2013-11-07 | 2015-05-14 | 東洋インキScホールディングス株式会社 | 導電性接着剤、導電性接着シート、配線デバイス、および配線デバイスの製造方法 |
JP2017024246A (ja) * | 2015-07-21 | 2017-02-02 | 武藤工業株式会社 | 複合樹脂材料 |
KR101973137B1 (ko) * | 2016-05-23 | 2019-04-26 | 타츠타 전선 주식회사 | 도전성 접착제 조성물 |
JP6694763B2 (ja) * | 2016-06-08 | 2020-05-20 | 信越ポリマー株式会社 | 電磁波シールドフィルムおよび電磁波シールドフィルム付きプリント配線板 |
-
2018
- 2018-03-15 JP JP2018048087A patent/JP6714631B2/ja active Active
- 2018-10-24 TW TW107137515A patent/TWI720356B/zh active
-
2019
- 2019-03-01 CN CN201910156490.7A patent/CN110278701A/zh active Pending
- 2019-03-15 KR KR1020190029952A patent/KR102423541B1/ko active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
TWI720356B (zh) | 2021-03-01 |
TW201940021A (zh) | 2019-10-01 |
JP2019161101A (ja) | 2019-09-19 |
KR102423541B1 (ko) | 2022-07-20 |
CN110278701A (zh) | 2019-09-24 |
KR20190109302A (ko) | 2019-09-25 |
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