Title:
ELECTROMAGNETIC WAVE SHIELD FILM
Document Type and Number:
WIPO Patent Application WO/2022/265101
Kind Code:
A1
Abstract:
Provided is an electromagnetic wave shield film having excellent blackness regardless of the constitutive composition of a black layer. An electromagnetic wave shield film 1 is provided on a surface thereof with a protective layer 2. The protective layer 2 has a black protective layer 21. The minimum autocorrelation length Sal of the surface of the protective layer 2 is 10 μm or less. The developed area ratio Sdr of the interface is 200% or more. The ratio [Sdr/Sal] of the Sdr to the Sal is at least 50. The brightness L* on the protective layer 2 side is preferably 24 or less.
Inventors:
UMEMURA SHIGEKAZU (JP)
ISOBE OSAMU (JP)
NONOGUCHI KOUTA (JP)
ISOBE OSAMU (JP)
NONOGUCHI KOUTA (JP)
Application Number:
PCT/JP2022/024340
Publication Date:
December 22, 2022
Filing Date:
June 17, 2022
Export Citation:
Assignee:
TATSUTA ELECTRIC WIRE & CABLE CO LTD (JP)
International Classes:
H05K9/00; B32B7/023; B32B7/025
Domestic Patent References:
| WO2018212146A1 | 2018-11-22 |
Foreign References:
| JP2021010032A | 2021-01-28 | |||
| JP2019076977A | 2019-05-23 | |||
| JP2019145769A | 2019-08-29 | |||
| JP2016143751A | 2016-08-08 |
Attorney, Agent or Firm:
G-CHEMICAL INTELLECTUAL PROPERTY FIRM (JP)
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