公开(公告)号：US20190263995A1

公开(公告)日：2019-08-29

申请号：US16320056

申请日：2017-04-06

Applicant: NITTO DENKO CORPORATION

Inventor： Masayoshi NAKAMURA ,  Masayuki HODONO ,  Takahiko ITO ,  Naoki NAGAOKA ,  Tomoaki HISHIKI

IPC: C08J9/26 ,  C08G73/10 ,  C08J5/18 ,  B32B7/022 ,  B32B7/025 ,  B32B27/08 ,  B32B27/28

Abstract: Provided is a low-dielectric porous polymer film having a low dielectric constant at high millimeter-wave frequencies and thereby useful as a sheet for a millimeter-wave antenna. The low-dielectric porous polymer film comprises: a base material layer made of a polymer material and formed with fine pores dispersed therein; and a substantially smooth skin layer made of the same polymer material as that of the base material layer and formed on at least one of the surfaces of the base material layer.

公开(公告)号：US20200032026A1

公开(公告)日：2020-01-30

申请号：US16500882

申请日：2018-04-06

Applicant: NITTO DENKO CORPORATION

Inventor： Masayoshi NAKAMURA ,  Masayuki HODONO ,  Takahiko ITO ,  Naoki NAGAOKA ,  Tomoaki HISHIKI

IPC: C08J9/28 ,  B32B7/12 ,  B32B15/08 ,  B32B15/20 ,  B32B27/28

Abstract: Provided is a porous low-dielectric polymer film which has a low dielectric constant at high millimeter-wave frequencies to fulfill utility as a sheet for a millimeter-wave antenna, and provides excellent circuit board processability. The porous low-dielectric polymer film is made of a polymer material and formed with fine pores dispersed therein, wherein the film has a porosity of 60% or more, and the pores have an average pore diameter of 50 μm or less, and wherein a porous structure of the film is a closed-cell structure.

公开(公告)号：US20190263996A1

公开(公告)日：2019-08-29

申请号：US16320366

申请日：2017-04-06

Applicant: NITTO DENKO CORPORATION

Inventor： Masayoshi NAKAMURA ,  Masayuki HODONO ,  Takahiko ITO ,  Naoki NAGAOKA ,  Tomoaki HISHIKI

IPC: C08J9/28 ,  C08G73/10

Abstract: Provided is a low-dielectric porous polymer film having a low dielectric constant at high millimeter-wave frequencies and thereby useful as a sheet for a millimeter-wave antenna. The low-dielectric porous polymer film is made of a polymer material and formed with fine pores dispersed therein, wherein the film has a porosity of 60% or more, and the pores have an average pore diameter of 10 μm or less.