Check patentability & draft patents in minutes with Patsnap Eureka AI!

A kind of leveling agent for color photoresist

A technology of leveling agent and monomer, applied in the field of liquid crystal display, can solve the problems of flushing out the leveling agent, poor wetting of the substrate by the molten photoresist material, etc., so as to improve the fluidity and reduce the roughness.

Active Publication Date: 2021-04-30
BEIJING ETERNAL MATERIAL TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the technical problem that Taper is out of specification because the leveling agent is easily washed away by the developer and the molten photoresist material does not wet the substrate well when the color filter is manufactured.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of leveling agent for color photoresist
  • A kind of leveling agent for color photoresist
  • A kind of leveling agent for color photoresist

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The present invention also relates to the preparation method of said leveling agent, comprising a polymerization reaction step and a post-treatment step,

[0029] Polymerization reaction step: use a four-necked flask as a reaction vessel, and connect a thermometer, a condenser (condensing reflux), a nitrogen inlet for protection, and a stirring paddle respectively. When synthesizing this leveling agent, benzoyl peroxide (BPO) or azobisisobutyronitrile (AIBN) is used as the initiator, and the stirring speed is 120-180rpm, and the solution of monomer, initiator, and chain transfer agent gradually turns to xylene Add dropwise for 1 to 2 hours. After the dropwise addition, continue to carry out solution polymerization in xylene at 60-80°C for 2-4 hours. The target molecular weight of the leveling agent in this technical proposal is preferably within 8000-10000, and the migration effect of the leveling agent will be deteriorated if the molecular weight is too large; dodecan...

Synthetic example 1

[0031] Synthesis example 1. Preparation of leveling agent A

[0032] Weigh 30 parts by weight of hexafluorobutyl acrylate, 30 parts by weight of styrene, 20 parts by weight of maleimide, 20 parts by weight of myrcene; and 6 parts by weight of initiator AIBN, 0.5 parts by weight of chain transfer agent dodecanethiol , dissolved in 100 parts by weight of xylene, mixed evenly and placed in a constant pressure funnel. In addition, 50 parts by weight of xylene was weighed and added into a four-neck flask, protected by nitrogen gas, heated to 65° C., and started to stir to 150 revolutions per minute (rpm).

[0033] Synthesis: Add the premixed monomer and initiator solution dropwise to xylene, and control the drop rate. The whole drop process takes 2 hours. After the drop is completed, keep stirring for 3 hours and add MEHQ 0.5 parts by weight to terminate the reaction.

[0034] Post-processing: use dropwise addition, after cooling the xylene solution obtained from the reaction to ...

Synthetic example 2

[0036] Synthesis example 2. Preparation of leveling agent B

[0037] Use 40 parts by weight of hexafluorobutyl acrylate, 30 parts by weight of acrylonitrile, 15 parts by weight of maleimide, 15 parts by weight of undecene; and 7 parts by weight of initiator AIBN, 0.5 parts by weight of chain transfer agent dodecanethiol , dissolved in 100 parts by weight of xylene, mixed evenly and placed in a constant pressure funnel. In addition, 50 parts by weight of xylene was weighed and added into a four-neck flask, protected by nitrogen gas, the temperature was raised to 60° C., and the stirring was started to 150 rpm.

[0038] Synthesis: Add the premixed monomer and initiator solution dropwise to xylene, and control the drop rate. The whole drop process takes 1.5 hours. After the drop is completed, keep the temperature and continue to stir for 4 hours. Add 0.5 parts by weight of MEHQ terminated the reaction.

[0039] Post-processing: use dropwise addition, after cooling the xylene so...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
glass transition temperatureaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
molecular weight distributionaaaaaaaaaa
Login to View More

Abstract

The invention provides a new type of leveling agent, which is mainly obtained by polymerization of the following monomers: 20-40 parts by weight of hexafluorobutyl acrylate, 20-40 parts by weight of a monomer with a glass transition temperature greater than 100°C, maleimide 10-20 parts by weight, and 10-20 parts by weight of long fatty side chain monomer. The leveling agent of the present invention is in a suspended state of tiny particles after being added to the photoresist, and is insoluble in propylene glycol methyl ether acetate, a common solvent for color photoresists, and can maintain a solid state within 100°C to avoid early migration to the photoresist surface in the previous process . It turns into a molten state during post-baking and slowly migrates outward to the surface of the photoresist, thereby improving the fluidity of the photoresist. At the same time, the leveling agent can significantly reduce the surface roughness of the photoresist material.

Description

technical field [0001] The invention belongs to the field of liquid crystal displays, and in particular relates to a novel leveling agent for color photoresists. Background technique [0002] The color filter is a key device for liquid crystal display to achieve colorization, and the performance of the color photoresist (also called photoresist) used to prepare the color filter directly affects the display effect of the liquid crystal display. The general preparation process of color filters includes glue coating-pre-baking-exposure-development-post-baking. Since the photoresist surface is cured better during the exposure process, it is easy to have a phenomenon that the upper part has a high degree of polymerization and the lower part has a low degree of polymerization. . In this way, an inverted trapezoidal structure tends to appear under the flushing action of developing. This inverted trapezoidal structure will collapse into a positive trapezoidal shape as the photores...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/24C08F212/08C08F222/40C08F220/18C08F220/44G03F7/004G03F7/00G03F7/40
Inventor 孙涛刘永祥桑伟
Owner BEIJING ETERNAL MATERIAL TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com