Film and laminate

Patent metadata

Field	Value
Publication number	US-2025178027-A1
Application number	US-202519052296-A
Country	US
Kind code	A1
Filing date	Feb 13, 2025
Priority date	Aug 31, 2022
Publication date	Jun 5, 2025
Grant date	—

Abstract

A film including a layer A, and a layer B on at least one surface of the layer A, in which a dielectric loss tangent is 0.01 or less, and a surface free energy on a surface of the layer B on a side opposite to a layer A side is 30 mJ/m 2 or less, a film including a layer A, and a layer B on at least one surface of the layer A, in which a dielectric loss tangent is 0.01 or less, and an ion intensity derived from a fluorine atom or a silicone structure, which is measured by time-of-flight secondary ion mass spectrometry, on a surface of the layer B on a side opposite to a layer A side, is larger than an ion intensity derived from a fluorine atom or a silicone structure, which is measured by time-of-flight secondary ion mass spectrometry, inside the layer B, and a laminate using the film.

First claim

What is claimed is:

1 . A film comprising:
a layer A; and a layer B on at least one surface of the layer A, wherein a dielectric loss tangent is 0.01 or less, and a surface free energy on a surface of the layer B on a side opposite to a layer A side is 30 mJ/m 2 or less.

2 . The film according to claim 1 ,
wherein the surface free energy on the surface of the layer B on the side opposite to the layer A side is 15 mJ/m 2 to 30 mJ/m 2 .

3 . The film according to claim 1 ,
wherein a ratio of an elastic modulus of the layer A at 160° C. to an elastic modulus of the layer B at 160° C. is 1.2 or more.

4 . The film according to claim 1 ,
wherein an elastic modulus of the layer B at 160° C. is 10 MPa or less.

5 . The film according to claim 1 ,
wherein a dielectric loss tangent of the layer B is 0.01 or less.

6 . The film according to claim 1 ,
wherein the layer B contains a liquid crystal polymer.

7 . The film according to claim 1 ,
wherein the layer B contains an aromatic polyester amide.

8 . The film according to claim 1 ,
wherein the layer B contains a thermoplastic resin having a constitutional unit having an aromatic hydrocarbon group.

9 . The film according to claim 1 ,
wherein a dielectric loss tangent of the layer A is 0.01 or less.

10 . The film according to claim 1 ,
wherein the layer A contains a liquid crystal polymer.

11 . The film according to claim 1 ,
wherein the layer A contains an aromatic polyester amide.

12 . A laminate comprising:
the film according to claim 1 ; and a metal layer or a metal wire disposed on at least one surface of the film.

13 . A film comprising:
a layer A; and a layer B on at least one surface of the layer A, wherein a dielectric loss tangent is 0.01 or less, and an ion intensity derived from a fluorine atom or a silicone structure, which is measured by time-of-flight secondary ion mass spectrometry, on a surface of the layer B on a side opposite to a layer A side, is larger than an ion intensity derived from a fluorine atom or a silicone structure, which is measured by time-of-flight secondary ion mass spectrometry, inside the layer B.

14 . The film according to claim 13 ,
wherein a ratio of an elastic modulus of the layer A at 160° C. to an elastic modulus of the layer B at 160° C. is 1.2 or more.

15 . The film according to claim 13 ,
wherein an elastic modulus of the layer B at 160° C. is 10 MPa or less.

16 . The film according to claim 13 ,
wherein a dielectric loss tangent of the layer B is 0.01 or less.

17 . The film according to claim 13 ,
wherein the layer B contains a liquid crystal polymer.

18 . The film according to claim 13 ,
wherein the layer B contains an aromatic polyester amide.

19 . The film according to claim 13 ,
wherein the layer B contains a thermoplastic resin having a constitutional unit having an aromatic hydrocarbon group.

20 . The film according to claim 13 ,
wherein a dielectric loss tangent of the layer A is 0.01 or less.

21 . The film according to claim 13 ,
wherein the layer A contains a liquid crystal polymer.

22 . The film according to claim 13 ,
wherein the layer A contains an aromatic polyester amide.

23 . A laminate comprising:
the film according to claim 13 ; and a metal layer or a metal wire disposed on at least one surface of the film.

24 . A laminate comprising, in the following order:
a layer A; a layer B; and a metal layer or a metal wire, wherein a dielectric loss tangent is 0.01 or less, and a surface free energy on a surface of the layer B on a side opposite to a layer A side is 30 mJ/m 2 or less.

25 . A laminate comprising, in the following order:
a layer A; a layer B; and a metal layer or a metal wire, wherein a dielectric loss tangent is 0.01 or less, and an ion intensity derived from a fluorine atom or a silicone structure, which is measured by time-of-flight secondary ion mass spectrometry, on a surface of the layer B on a side opposite to a layer A side, is larger than an ion intensity derived from a fluorine atom or a silicone structure, which is measured by time-of-flight secondary ion mass spectrometry, inside the layer B.

Assignees

• Fujifilm Corp

Inventors

• Hara Miyoko
• Sasada Yasuyuki
• Tamura Akio

Classifications

• B05D2505/00

  Polyamides · CPC title

• B05D2202/45

  based on Cu · CPC title

• B05D1/28

  performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers · CPC title

• B32B27/00

  Layered products comprising {a layer of} synthetic resin {(fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18)} · CPC title

• H05K1/03

  Use of materials for the substrate · CPC title