Photocurable composition comprising an organic ionic compound

Patent metadata

Field	Value
Publication number	US-2024402595-A1
Application number	US-202418800476-A
Country	US
Kind code	A1
Filing date	Aug 12, 2024
Priority date	Jan 28, 2021
Publication date	Dec 5, 2024
Grant date	—

Abstract

A photocurable composition can comprise a polymerizable material, an organic ionic compound and a photoinitiator, wherein an amount of the organic ionic compound may be not greater than 1.5 wt %, the organic ionic compound comprises an organic cation, and a conductivity of the photocurable composition can be at least 20 μS/cm. The photocurable composition can have an improved drop spreading and merging of drops in comparison to the same composition but not including the organic ionic compound.

First claim

What is claimed is:

1 . A photocurable composition comprising a polymerizable material, an organic ionic compound and a photoinitiator, wherein
an amount of the organic ionic compound is at least 0.05 wt % and not greater than 1.5 wt %; the organic ionic compound comprises an organic cation, the organic cation comprising an imidazole ring, or a functional group which can participate in a polymerization reaction of the polymerizable material, or a combination thereof; an amount of the polymerizable material is at least 80 wt % based on the total weight of the photocurable composition; a conductivity of the photocurable composition is at least 20 μS/cm; and a viscosity of the photocurable composition is not greater than 25 mPa s.

2 . The photocurable composition of claim 1 , wherein the amount of the organic ionic compound is at least 0.05 wt % and not greater than 1.2 wt %.

3 . The photocurable composition of claim 1 , wherein the functional group of the organic cation is a vinyl group.

4 . The photocurable composition of claim 1 , wherein the organic cation comprises not more than 20 carbon atoms.

5 . The photocurable composition of claim 4 , wherein the organic cation comprises not more than 10 carbon atoms.

6 . The photocurable composition of claim 4 , wherein the organic ionic compound includes diphenyliodonium hexafluorophosphate, 1-ethyl-3-methylimidazolium dicyanamide, 1-allyl-3-methylimidazolium dicyanamide, or any combination thereof.

7 . The photocurable composition of claim 1 , wherein the conductivity of the photocurable composition is at least 50 μS/cm.

8 . The photocurable composition of claim 1 , wherein the amount of the polymerizable material is at least 90 wt % based on the total weight of the photocurable composition.

9 . The photocurable composition of claim 1 , wherein the photocurable composition is free of a solvent.

10 . The photocurable composition of claim 1 , wherein the organic ionic compound is dissolved in the polymerizable material.

11 . The photocurable composition of claim 1 , wherein the polymerizable material comprises at least one mono-functional acrylate monomer and at least one multi-functional acrylate monomer.

12 . The photocurable composition of claim 1 , wherein the photocurable composition is adapted for inkjet adaptive planarization (IAP) or nanoimprint lithography (NIL) processing.

13 . The photocurable composition of claim 1 , wherein the photocurable composition is adapted that a storage modulus after UV curing the photocurable composition is maintained in comparison to a storage modulus obtained after UV curing of a same photocurable composition but not including the organic ionic compound, wherein a variation of the storage modulus is not greater than 1.6 percent.

14 . The photocurable composition of claim 1 , wherein the photocurable composition is adapted that a glass transition temperature after UV curing of the photocurable composition is increased in comparison to a glass transition temperature after UV curing of a same photocurable composition but not including the organic ionic compound.

Assignees

• Canon Kk

Inventors

• Wan Fen
• Liu Weijun

Classifications

• C08K5/3445

  Five-membered rings · CPC title

• C08F220/1811

  C10or C11-(Meth)acrylate, e.g. isodecyl (meth)acrylate, isobornyl (meth)acrylate or 2-naphthyl (meth)acrylate · CPC title

• C08F220/1807

  C7-(meth)acrylate, e.g. heptyl (meth)acrylate or benzyl (meth)acrylate · CPC title

• C08K5/02

  Halogenated hydrocarbons {(C08K5/0091 takes precedence)} · CPC title

• C08F2/50

  with sensitising agents · CPC title