Title:
ELECTROMAGNETIC WAVE INHIBITING SHEET, LAMINATED ELECTROMAGNETIC WAVE INHIBITING SHEET, REFLECTION LOSS ADJUSTING METHOD USING ELECTROMAGNETIC WAVE INHIBITING SHEET, AND REFLECTION LOSS ADJUSTING METHOD USING LAMINATED ELECTROMAGNETIC WAVE INHIBITING SHEET
Document Type and Number:
WIPO Patent Application WO/2023/243307
Kind Code:
A1
Abstract:
Provided are: an electromagnetic wave inhibiting sheet, and a laminated electromagnetic wave inhibiting sheet which can minimize surface reflection of electromagnetic waves by incorporating an antireflection-structured layer having a structure of preventing reflection of visible light into an electromagnetic wave irradiation surface; and adjusting methods for adjusting reflection of electromagnetic waves using said sheets. An electromagnetic wave inhibiting sheet 50 according to the present invention includes a sheet-like base material 50B, and an antireflection-structured layer 50A that is provided on one surface of the sheet-like base material 50B and that prevents reflection of visible light. The sheet-like base material 50B and the antireflection-structured layer 50A are each formed from a thermoplastic resin having added thereto at least an electromagnetic wave inhibiting material, and the area proportion of the antireflection-structured layer 50A with respect to the area of the one surface of the sheet-like base material is at least 30%. For the sheet-like base material 50B and the antireflection-structured layer 50A, different thermoplastic resins and/or electromagnetic wave inhibiting materials may be used. Accordingly, it is possible to select, as appropriate, an electromagnetic wave inhibiting material for the antireflection-structured layer.
Inventors:
YOSHIOKA TAKASHI (JP)
Application Number:
PCT/JP2023/018749
Publication Date:
December 21, 2023
Filing Date:
May 19, 2023
Export Citation:
Assignee:
SEIWA ELECTRIC MFG (JP)
International Classes:
H01Q17/00; G02B1/11; H05K9/00
Foreign References:
| JP2002151885A | 2002-05-24 | |||
| JP2004095782A | 2004-03-25 | |||
| JP2011204732A | 2011-10-13 | |||
| JPH04223399A | 1992-08-13 | |||
| JP2010098073A | 2010-04-30 |
Attorney, Agent or Firm:
SAHARA Ryuichi (JP)
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