Fluororesin substrate laminate

Patent metadata

Field	Value
Publication number	US-11745482-B2
Application number	US-202017081090-A
Country	US
Kind code	B2
Filing date	Oct 27, 2020
Priority date	Oct 29, 2019
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

The present disclosure relates to a fluororesin substrate laminate for a high-frequency circuit, the fluororesin substrate laminate including a fluororesin substrate and an adhesive layer provided on the fluororesin substrate, wherein the adhesive layer includes a resin composition containing: (A) a maleimide compound having a saturated or unsaturated divalent hydrocarbon group; and (B) an aromatic maleimide compound.

First claim

What is claimed is:

1. A fluororesin substrate laminate for a high-frequency circuit,
the fluororesin substrate laminate comprising a fluororesin substrate and an adhesive layer provided on the fluororesin substrate,
wherein the fluororesin substrate has
a dielectric loss tangent measured at a frequency of 10 GHz and a measurement temperature of 25° C. of 0.0010 to 0.0020, and
a coefficient of thermal expansion of 30 ppm/° C. or less in a direction of the fluororesin substrate,

wherein the fluororesin substrate has a thickness of 120 μm to 12700 μm, and
wherein the adhesive layer includes a resin composition containing: (A) a maleimide compound having a saturated or unsaturated divalent hydrocarbon group; and (B) an aromatic maleimide compound.

2. The fluororesin substrate laminate according to claim 1 , wherein the fluororesin substrate is a substrate including polytetrafluoroethylene.

3. The fluororesin substrate laminate according to claim 1 , wherein the (B) aromatic maleimide compound has a structure having a maleimide group bonded to an aromatic ring.

4. The fluororesin substrate laminate according to claim 1 , wherein the saturated or unsaturated divalent hydrocarbon group has 8 to 100 carbon atoms.

5. The fluororesin substrate laminate according to claim 1 , wherein the saturated or unsaturated divalent hydrocarbon group is a group represented by the following Formula (II):

wherein in Formula (II), R 2 and R 3 each independently represent an alkylene group having 4 to 50 carbon atoms; R 4 represents an alkyl group having 4 to 50 carbon atoms; and R 5 represents an alkyl group having 2 to 50 carbon atoms.

6. The fluororesin substrate laminate according to claim 1 , wherein the (A) maleimide compound having a saturated or unsaturated divalent hydrocarbon group further has a divalent group having at least two imide bonds.

7. The fluororesin substrate laminate according to claim 6 , wherein the divalent group having at least two imide bonds is a group represented by the following Formula (I):

wherein in Formula (I), R 1 represents a tetravalent organic group.

8. The fluororesin substrate laminate according to claim 1 , wherein the (A) maleimide compound having a saturated or unsaturated divalent hydrocarbon group has a weight average molecular weight of 500 to 10000.

9. The fluororesin substrate laminate according to claim 1 , further comprising a metal foil on the adhesive layer.

10. The fluororesin substrate laminate according to claim 9 , wherein the metal foil has a surface roughness of 0.05 to 2 μm.

11. The fluororesin substrate laminate according to claim 1 , wherein the resin composition further comprises a cyanate ester resin.

12. The fluororesin substrate laminate according to claim 1 , wherein the resin composition further comprises a styrene-ethylene-butylene copolymer modified with maleic anhydride.

13. The fluororesin substrate laminate according to claim 1 , wherein the fluororesin substrate has a dielectric loss tangent measured at a frequency of 10 GHz and a measurement temperature of 25° C. of 0.0010 to 0.0013.

14. The fluororesin substrate laminate according to claim 1 , wherein the fluororesin substrate has a dielectric constant measured at a frequency of 10 GHz and a measurement temperature of 25° C. of 2.2 to 3.5.

Assignees

• Showa Denko Materials Co Ltd
• Resonac Corp

Inventors

• Murai Kosuke
• Tanigawa Takao
• Kakitani Minoru
• Yanagida Makoto
• Shimada Mami

Classifications

• B32B27/322 Primary

  comprising halogenated polyolefins, e.g. PTFE · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B15/085

  comprising polyolefins · CPC title

• C09J7/241

  Polyolefin, e.g.rubber · CPC title

• C09J7/30

  characterised by the adhesive composition · CPC title