Hardmask Composition for Ultra-Fine Semiconductor Patterning
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Solution Overview
Problem
Current lithographic techniques face challenges in forming fine patterns with high film density and strength, especially in ultra-fine semiconductor manufacturing, as existing hardmask materials lack sufficient etch resistance and mechanical properties to effectively transfer patterns of several nanometer sizes.
Innovation Solution
A hardmask composition comprising a self-polymer represented by Chemical Formula 1, with specific structural units and a solvent, which forms a dense film structure upon heat-treatment, enhancing film density and strength, and is applied in a method involving heat-treatment, photoresist patterning, and selective etching to achieve pattern transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional hardmask materials are used, then the lithographic process can be performed, but the film density and strength are insufficient for ultra-fine pattern transfer
Solution Approach 1:
The patent modifies the chemical composition parameters of the hardmask material by incorporating specific compounds (e.g., compounds with formula 1, 2, or 3) and adjusting the ratio of hardmask material to organic solvent (1:1 to 10:1), which fundamentally changes the film's physical properties to achieve both high strength and etch resistance required for ultra-fine patterning
Solution Approach 2:
The patent creates a composite hardmask composition by combining multiple components including compounds with specific chemical formulas, organic solvents, and optional additives, forming a multi-component system that achieves synergistic effects to simultaneously improve film strength and etch resistance for nanometer-scale pattern transfer
2Manufacturing precision
If the pattern size is reduced to several nanometers, then ultra-fine semiconductor devices can be manufactured, but the existing hardmask materials cannot maintain sufficient film density and mechanical properties
Solution Approach 1:
The patent optimizes critical parameters including the hardmask-to-solvent ratio (1:1 to 10:1), heating temperature (400-600°C), and chemical composition ratios to achieve the precise film density and mechanical strength required for transferring patterns at several nanometer dimensions without material failure
Solution Approach 2:
The patent enhances the local quality of the hardmask film by creating a composition with specific chemical characteristics that provide localized reinforcement and density enhancement, enabling the film to maintain structural integrity during the precise etching of ultra-fine nanometer-scale patterns
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 composition achieves high film density and improved film strength, enabling effective pattern formation and etch resistance, thereby facilitating the creation of fine patterns in semiconductor manufacturing.
Implementation Method 1
A hardmask composition comprising a self-polymer represented by Chemical Formula 1, with specific structural units and a solvent, which forms a dense film structure upon heat-treatment, enhancing film density and strength
Implementation Method 2
exposing and developing the photoresist layer to form a photoresist pattern
Data Source
AI summary
A hardmask composition, a hardmask layer including a cured product of the hardmask composition, and a method of forming patterns using the hardmask layer including a cured product of the hardmask composition, the hardmask composition including a compound represented by Chemical Formula 1, below; and a solvent,