Photosensitive Organic Particles for Uniform Coating Patterns
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Solution Overview
Problem
Existing photosensitive compositions struggle to form uniform patterns on base materials without the use of dispersion stabilizers, as water-soluble organic particles often dissolve in solvents, making it difficult to achieve stable dispersion and pattern formation.
Innovation Solution
A photosensitive composition comprising water-soluble organic particles with specific unit structures for forming particles, interparticle crosslinkage, and dispersibility, combined with a photoacid generator, which allows for excellent dispersion in poor solvents and selective development using water, enabling pattern formation without stabilizers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If water-soluble organic particles are used in a solvent, then the particles can be dispersed, but the particles dissolve in the solvent making stable dispersion difficult
Solution Approach 1:
The patent changes the solvent parameter from a good solvent to a poor solvent for the water-soluble organic particles. This parameter change prevents dissolution while maintaining dispersibility, resolving the contradiction between dispersion stability and pattern formation reliability
Solution Approach 2:
The patent introduces a specific type of poor solvent as an intermediary medium that allows the water-soluble organic particles to disperse without dissolving. This intermediary solvent enables both stable dispersion and reliable pattern formation by controlling the solubility characteristics
2Stability of the object's composition
If dispersion stabilizers are used to maintain particle dispersion, then dispersion stability improves, but the composition complexity increases
Solution Approach 1:
The patent extracts and eliminates the need for dispersion stabilizers by selecting a poor solvent that inherently prevents dissolution. This removal of unnecessary components simplifies the composition while maintaining dispersion stability
Solution Approach 2:
The poor solvent system provides self-service by inherently preventing particle dissolution through its solubility characteristics, eliminating the need for additional stabilizing agents and simplifying the overall composition
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition allows for the formation of uniform photosensitive coatings on base materials, enabling pattern creation through light exposure and development, with the ability to maintain particle properties and inhibit protein absorption, suitable for applications like cell culture substrates and biochips.
Implementation Method 1
the photosensitive composition further comprises a photoacid generator
Implementation Method 2
a unit structure (B) for forming interparticle crosslinkage
Data Source
AI summary
A material forms a pattern by applying a photosensitive composition to a base material and drying to form a photosensitive coating and performing exposure and development, and a method for forming the pattern. A photosensitive composition includes water-soluble organic particles, and a solvent, wherein the solvent is a poor solvent for the water-soluble organic particles. Preferably, the water-soluble organic particles of the photosensitive composition includes a polymer which contains a unit structure (A) for forming organic particles, a unit structure (B) for forming interparticle crosslinkage, and a unit structure (C) for imparting dispersibility, and the photosensitive composition further includes a photoacid generator. In addition, the water-soluble organic particles of the photosensitive composition includes a polymer which contains the unit structure (A) for forming organic particles, the unit structure (B) for forming interparticle crosslinkage, the unit structure (C) for imparting dispersibility, and a unit structure (D) having a photoacid generating group.