US 11,646,127 B2Granted

Fibrillated liquid crystal polymer powder, method of producing fibrillated liquid crystal polymer powder, paste, resin multilayer substrate, and method of producing resin multilayer substrate

AssigneeMurata Manufacturing Co., Ltd.

InventorHiroyuki Ohata

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Abstract

A fibrillated liquid crystal polymer powder containing fibrillated liquid crystal polymer particles. A paste containing a dispersion medium and the fibrillated liquid crystal polymer powder. A method of producing the fibrillated liquid crystal polymer powder. A resin multilayer substrate obtained by laminating a plurality of resin sheets including at least one layer of a liquid crystal polymer sheet. On a surface of at least one layer of the liquid crystal polymer sheet, a thickness adjustment layer made of a fibrillated liquid crystal polymer powder containing fibrillated liquid crystal polymer particles is provided in a region insufficient in thickness when at least the plurality of resin sheets are laminated.

Claims2

Dependent claims

A method of producing a fibrillated liquid crystal polymer powder containing fibrillated liquid crystal polymer particles, comprising, in the following order:

a grinding step of grinding a biaxially-oriented liquid crystal polymer film to obtain a ground liquid crystal polymer powder having a particle size of 0.1 μm to 300 μm;
a dispersion preparing step of dispersing the ground liquid crystal polymer powder into a dispersion medium to prepare a dispersion of the ground liquid crystal polymer powder, wherein the dispersion medium has a boiling point not exceeding a melting point of the ground liquid crystal polymer powder;
a fibrillating step of causing the dispersion of the ground liquid crystal polymer powder to pass through a nozzle under high pressure to crush the ground liquid crystal polymer powder by a wet high-pressure crushing device to obtain the fibrillated liquid crystal polymer powder;
and
a dispersion medium removing step of removing the dispersion medium to collect the fibrillated liquid crystal polymer powder.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/190,266Filed 14 Nov 2018 · division
Priority: JP 2013-10783522 May 2013
Published: US 2019/0080817 A114 Mar 2019
Granted: 9 May 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification31 codes

H01B 3/307
Plastics; resins; waxes: other macromolecular compounds
B32B 27/08
As the main or only constituent of a layer, which is next to another layer of the same or of a different material: of synthetic resin
B32B 37/06
Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding: characterised by the heating method
B32B 37/10
Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding: characterised by the pressing technique, e.g. using action of vacuum…

Family

PCT/JP2014/061031Parent of this continuation · filed 18 Apr 2014
Application14/750,365Parent of this division · filed 25 Jun 2015
US 2019/0080817 A1Pre-grant publication · published 14 Mar 2019
Application14/750,365Parent of this continuation
US 2015/0294754 A1Published application
US 11,646,127 B2This patent

From the US filing history. Foreign family members aren’t listed.

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