Liquid crystal polymer film and laminate comprising the same

Patent metadata

Field	Value
Publication number	US-12103285-B2
Application number	US-202016748846-A
Country	US
Kind code	B2
Filing date	Jan 22, 2020
Priority date	Dec 23, 2019
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

Provided are a liquid crystal polymer (LCP) film and a laminate comprising the same. The LCP film has a first surface and a second surface opposite each other, and a ratio of a ten-point mean roughness relative to a maximum height (Rz/Ry) of the first surface is from 0.30 to 0.62. By controlling Rz/Ry of at least one surface of the LCP film, the peel strength of the LCP film stacked to a metal foil can be increased, and the laminate comprising the same can still maintain the merit of low insertion loss.

First claim

What is claimed is:

1. A liquid crystal polymer film, comprising a first surface and a second surface opposite each other, a ratio of a ten-point mean roughness relative to a maximum height of the first surface being more than or equal to 0.36 and less than or equal to 0.61, and an arithmetic average roughness of the first surface being less than or equal to 0.09 μm; wherein the ten-point mean roughness, the maximum height, and the arithmetic average roughness are defined according to JIS B 0601:1994.

2. The liquid crystal polymer film as claimed in claim 1 , wherein the arithmetic average roughness of the first surface is more than or equal to 0.02 μm and less than or equal to 0.08 μm.

3. The liquid crystal polymer film as claimed in claim 2 , wherein a ratio of a ten-point mean roughness relative to a maximum height of the second surface is more than or equal to 0.30 and less than or equal to 0.62.

4. The liquid crystal polymer film as claimed in claim 3 , wherein an arithmetic average roughness of the second surface is less than or equal to 0.09 μm.

5. The liquid crystal polymer film as claimed in claim 1 , wherein the ten-point mean roughness of the first surface is less than or equal to 2 μm.

6. The liquid crystal polymer film as claimed in claim 5 , wherein the ten-point mean roughness of the first surface is less than or equal to 1.5 μm.

7. The liquid crystal polymer film as claimed in claim 6 , wherein a ratio of a ten-point mean roughness relative to a maximum height of the second surface is more than or equal to 0.30 and less than or equal to 0.62.

8. The liquid crystal polymer film as claimed in claim 7 , wherein an arithmetic average roughness of the second surface is less than or equal to 0.09 μm.

9. The liquid crystal polymer film as claimed in claim 5 , wherein a ratio of a ten-point mean roughness relative to a maximum height of the second surface is more than or equal to 0.30 and less than or equal to 0.62.

10. The liquid crystal polymer film as claimed in claim 9 , wherein an arithmetic average roughness of the second surface is less than or equal to 0.09 μm.

11. The liquid crystal polymer film as claimed in claim 1 , wherein a ratio of a ten-point mean roughness relative to a maximum height of the second surface is more than or equal to 0.30 and less than or equal to 0.62.

12. The liquid crystal polymer film as claimed in claim 11 , wherein an arithmetic average roughness of the second surface is less than or equal to 0.09 μm.

13. A laminate, comprising a first metal foil and the liquid crystal polymer film as claimed in claim 1 , the first metal foil disposed over the first surface of the liquid crystal polymer film.

14. The laminate as claimed in claim 13 , wherein the laminate comprises a second metal foil, and the second metal foil is disposed over the second surface of the liquid crystal polymer film.

Assignees

• Chang Chun Plastics Co Ltd

Inventors

• Tu An-Pang
• Wu Chia-Hung
• Chen Chien-Chun

Classifications

• C08J2367/04

  Polyesters derived from hydroxy carboxylic acids, e.g. lactones (C08J2367/06 takes precedence) · CPC title

• C08J5/18 Primary

  Manufacture of films or sheets · CPC title

• C08G63/83

  Alkali metals, alkaline earth metals, beryllium, magnesium, copper, silver, gold, zinc, cadmium, mercury, manganese, or compounds thereof {(C08G63/823 takes precedence)} · CPC title

• C08G63/065

  the hydroxy and carboxylic ester groups being bound to aromatic rings · CPC title

• B32B2307/538

  Roughness · CPC title