Water-Based Resist Underlayer Composition for Semiconductor Processing
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Solution Overview
Problem
The resist underlayer film-forming compositions used in semiconductor processing are typically organic solvent-based, which poses environmental and health concerns, and there is a need for a water-based alternative that maintains performance.
Innovation Solution
A resist underlayer film-forming composition using water as a solvent, comprising a first component, a second component, and water, where the second component is a water-soluble polymer, and the mass ratio of the first component to the second component is between 99:1 and 50:50, with water making up at least 50% of the solvent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If organic solvent-based composition is used, then film-forming performance and solvent resistance are improved, but environmental load and health risks increase
Solution Approach 1:
The patent changes the fundamental parameter of the solvent system from organic-based to water-based. The composition uses water as the primary solvent (50-95 mass%) instead of organic solvents, while adjusting the polymer component ratios to maintain film-forming performance and solvent resistance in the aqueous environment.
Solution Approach 2:
The patent creates a composite composition system combining water-soluble polymers (second component) with other functional components (first component) in specific ratios. This composite approach allows the aqueous composition to achieve the necessary film properties, adhesion, and solvent resistance typically provided by organic solvent-based systems.
2Object-affected harmful factors
If water-based composition is used, then environmental load is reduced, but film-forming performance and solvent resistance may deteriorate
Solution Approach 1:
The patent optimizes the composition parameters by controlling the mass ratio of first component to second component within 99:1 to 50:50, and adjusting the water content to 50-95 mass%. These parameter adjustments ensure that the aqueous composition achieves adequate solvent resistance and film-forming performance despite using water instead of organic solvents.
Solution Approach 2:
The patent employs a composite material system where water-soluble polymers (second component) are combined with functional components (first component) in optimized proportions. This composite structure enables the aqueous composition to maintain film integrity and solvent resistance that would otherwise be difficult to achieve in water-based systems.
3Ease of operation
If water-based composition is used, then safety and ease of handling are improved, but manufacturing complexity may increase
Solution Approach 1:
The patent simplifies manufacturing by changing the solvent base to water, which eliminates the need for specialized organic solvent handling facilities, reduces fire safety requirements, and simplifies waste treatment. The composition parameters (component ratios and water content) are optimized to ensure straightforward processing and application.
Data Source
AI summary
A resist underlayer film-forming composition containing: a first component; a second component; and a solvent, in which the second component is a water-soluble polymer, a mass ratio (first component:second component) between the first component and the second component is 99:1 to 50:50, and the solvent contains water in an amount of 50 mass % or more relative to the solvent.