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US 2020/0048480 A1Published application
Photocurable inkjet ink
AssigneeJnc Corporation
InventorsKohsuke YOSHITOMI, Shinta MOROKOSHI, Toshiyuki TAKAHASHI, Hisao OIKAWA
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AssigneeJnc Corporation
InventorsKohsuke YOSHITOMI, Shinta MOROKOSHI, Toshiyuki TAKAHASHI, Hisao OIKAWA
Estimating the term…
An object of the invention is to provide a photocurable inkjet ink useful for producing microlenses and electronic components, and having low volatility. The photocurable inkjet ink of the invention contains polyfunctional (meth)acrylate (A), monofunctional (meth)acrylate (B) having nonvolatility of 75% or more and viscosity (25° C.) of 1 to 70 mPa·s in evaluation method 1, and photopolymerization initiator (C); and having viscosity (at 25° C.) of 1 to 100 mPa·s.
A photocurable inkjet ink, containing polyfunctional (meth)acrylate (A), monofunctional (meth)acrylate (B) having nonvolatility of 75% or more and viscosity (25° C.) of 1 to 70 mPa·s of an evaluation solution in evaluation method 1, and photopolymerization initiator (C);
Dependencies are inferred from the claim text.
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Based on artificial resins: inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with…
Characterised by bringing liquid or particles selectively into contact with a printing material: ink jet
Duplicating or marking methods; Sheet materials for use therein: digital printing methods characterised by the inks used
Containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds: from unsaturated acids or derivatives…
Term end not estimated
The invention relates to a photocurable inkjet ink preferably used for producing an optical instrument such as a video display apparatus. More specifically, the invention relates to a microlens formation ink used for an optical system for enhancing three-dimensional image formation of an image or light use efficiency of a device.
Moreover, the invention relates to a photocurable inkjet ink preferably used for producing an electronic component such as a semiconductor apparatus and a flexible wiring board. More specifically, the invention relates to an ink for forming an insulating material that forms a pattern of a buffer coat, a redistribution insulating material, a dam material or an underfill material for a wafer level package, a cover lay for the flexible wiring board, or the like.
An application has been studied on a microlens as a light guide plate for a video display apparatus in which a fine uneven structure is utilized, or as a material of a 3D image display device or a counterfeit prevention device because the microlens can express a special visual effect (for example, Patent literature Nos. 1 and 2).
Hereinafter, the invention will be specifically described.
The invention relates to a photocurable inkjet ink containing polyfunctional (meth)acrylate (A), monofunctional (meth)acrylate (B) having low volatility, and photopolymerization initiator (C); and having viscosity (at 25° C.) of about 1 to about 100 mPa·s.
The photocurable inkjet ink of the invention is preferably colorless and transparent for use in an electronic component requiring an optical function. However, the photocurable inkjet ink is not limited thereto unless the optical function of a cured film obtained is significantly impaired, or the electronic component mounted is adversely affected.