JP2022048145A5 - - Google Patents

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JP2022048145A5
JP2022048145A5 JP2021209263A JP2021209263A JP2022048145A5 JP 2022048145 A5 JP2022048145 A5 JP 2022048145A5 JP 2021209263 A JP2021209263 A JP 2021209263A JP 2021209263 A JP2021209263 A JP 2021209263A JP 2022048145 A5 JP2022048145 A5 JP 2022048145A5
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electromagnetic wave
dielectric layer
wave absorber
layer
range
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JP2021209263A
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JP2022048145A (en
JP7350048B2 (en
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Priority claimed from JP2018232235A external-priority patent/JP7000301B2/en
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Claims (5)

誘電体層と、上記誘電体層の一方の面に設けられる抵抗層と、上記誘電体層の一方の面に設けられ上記抵抗層より低いシート抵抗を有する導電層とを有する電磁波吸収体であって、上記導電層の厚みが２０ｎｍ～１００μｍの範囲にあり、上記導電層のシート抵抗が１．０×１０ -7 ～１００Ω／□の範囲に設定されており、６０～９０ＧＨｚの周波数帯域において、電磁波吸収量が２０ｄＢ以上である周波数帯域の帯域幅が２ＧＨｚ以上であることを特徴とする電磁波吸収体。 An electromagnetic wave absorber having a dielectric layer, a resistance layer provided on one surface of the dielectric layer, and a conductive layer provided on one surface of the dielectric layer and having a sheet resistance lower than that of the resistance layer . The thickness of the conductive layer is in the range of 20 nm to 100 μm, the sheet resistance of the conductive layer is set in the range of 1.0 × 10 -7 to 100 Ω / □, and the frequency band is 60 to 90 GHz. The electromagnetic wave absorber is characterized in that the bandwidth of the frequency band having an electromagnetic wave absorption amount of 20 dB or more is 2 GHz or more. 上記誘電体層が、単層または複層からなる請求項１記載の電磁波吸収体。The electromagnetic wave absorber according to claim 1, wherein the dielectric layer is a single layer or a plurality of layers. 上記誘電体層の比誘電率が、１～５．１９の範囲にある請求項１または２記載の電磁波吸収体。The electromagnetic wave absorber according to claim 1 or 2, wherein the relative permittivity of the dielectric layer is in the range of 1 to 5.19. 上記誘電体層の厚みが、１００～１０００μｍの範囲にある請求項１～３のいずれか一項に記載の電磁波吸収体。The electromagnetic wave absorber according to any one of claims 1 to 3, wherein the thickness of the dielectric layer is in the range of 100 to 1000 μm. 上記電磁波吸収量が２０ｄＢ以上である周波数帯域の帯域幅が、５ＧＨｚ以上である請求項１～４のいずれか一項に記載の電磁波吸収体。The electromagnetic wave absorber according to any one of claims 1 to 4, wherein the bandwidth of the frequency band having an electromagnetic wave absorption amount of 20 dB or more is 5 GHz or more.
JP2021209263A 2018-12-12 2021-12-23 electromagnetic wave absorber Active JP7350048B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021209263A JP7350048B2 (en) 2018-12-12 2021-12-23 electromagnetic wave absorber

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JP2018232235A JP7000301B2 (en) 2018-12-12 2018-12-12 Electromagnetic wave absorber
JP2021209263A JP7350048B2 (en) 2018-12-12 2021-12-23 electromagnetic wave absorber

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JP2018232235A Division JP7000301B2 (en) 2018-12-12 2018-12-12 Electromagnetic wave absorber

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JP2022048145A JP2022048145A (en) 2022-03-25
JP2022048145A5 true JP2022048145A5 (en) 2022-04-04
JP7350048B2 JP7350048B2 (en) 2023-09-25

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7000301B2 (en) * 2018-12-12 2022-01-19 日東電工株式会社 Electromagnetic wave absorber
KR20220100869A (en) 2019-11-18 2022-07-18 도레이 카부시키가이샤 laminated sheet
WO2022065006A1 (en) 2020-09-28 2022-03-31 富士フイルム株式会社 Laminate manufacturing method, antenna-in package manufacturing method, laminate, and composition

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004296758A (en) 2003-03-27 2004-10-21 Takechi Kogyo Gomu Co Ltd Millimeter wave absorber
JP7000301B2 (en) * 2018-12-12 2022-01-19 日東電工株式会社 Electromagnetic wave absorber

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