Spin-Coated Hardmask Composition for High Etch Resistance
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Solution Overview
Problem
Existing hardmask layers formed via spin-coating techniques exhibit low etch resistance, which is crucial for ultra-fine pattern formation in semiconductor manufacturing, and traditional deposition methods are economically inefficient.
Innovation Solution
A hardmask composition comprising a polymer with specific structural units and solvents, such as propylene glycol monomethyl ether acetate, is applied via spin-coating, followed by heat-treatment to form a hardmask layer that enhances etch resistance and maintains solubility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional deposition methods are used to form hardmask layers, then film density and etch resistance can be achieved, but manufacturing cost increases and process complexity increases
Solution Approach 1:
The patent replaces traditional physical deposition methods (PVD, CVD) with a chemical solution-based spin-coating process. The hardmask layer is formed by applying a polymer solution and curing it thermally, substituting complex mechanical/deposition systems with a simpler liquid processing approach that achieves comparable etch resistance at lower cost
Solution Approach 2:
The patent modifies the chemical composition parameters of the hardmask material by using specifically designed polymer molecules with controlled molecular weight, functional groups, and compositional ratios. These parameter changes enable the solution-processable material to achieve deposition density and etch resistance previously only attainable through complex deposition methods
2Ease of manufacture
If spin-coating is used to form hardmask layers, then manufacturing cost decreases and process simplicity increases, but etch resistance is insufficient
Solution Approach 1:
The patent creates a composite hardmask material system combining specifically designed polymer molecules with controlled composition ratios. The composite structure incorporates multiple functional groups and molecular weight distributions that work synergistically to provide both solution processability and high etch resistance, overcoming the limitations of simple polymer coatings
Solution Approach 2:
The patent achieves improved etch resistance by precisely controlling material parameters including molecular weight (1,000-200,000 g/mol), functional group composition, and polymer architecture. These parameter optimizations enable the spin-coated film to form dense, crosslinkable structures that resist etching while maintaining simple liquid processing
3Strength
If polymer molecular weight is increased to improve film strength, then film strength increases, but solubility decreases making processing difficult
Solution Approach 1:
The patent optimizes the molecular weight parameter within a specific range (1,000-200,000 g/mol) to balance film strength and solubility. This parameter control ensures the polymer is heavy enough to form strong films but light enough to remain soluble in processing solvents, enabling both good mechanical properties and easy processing
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 hardmask layer achieves high etch resistance, film density, and film strength, enabling effective pattern transfer in semiconductor manufacturing while maintaining solubility and reducing process costs.
Implementation Method 1
applying the hardmask composition to the material layer
Implementation Method 2
heat-treating the hardmask composition to form a hardmask layer
Implementation Method 3
a hardmask layer including a cured product of the hardmask composition
Data Source
AI summary
A hardmask composition, a hardmask layer including a cured product of the hardmask composition, and a method of forming patterns that uses the hardmask layer including a cured product of the hardmask composition, the hardmask composition includes a polymer including a structural unit represented by Chemical Formula 1; and a solvent,