Polymer Hardmask Composition for Ultra-Fine Pattern Profiles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lithographic techniques face challenges in forming fine patterns with excellent profiles, particularly in ultra-fine semiconductor manufacturing where pattern sizes are in the range of several to several tens of nanometers.
Innovation Solution
A polymer with specific structural units represented by Chemical Formulas 1 and 2 is used to form an organic layer composition, which includes heat-treating the composition to create a hardmask layer. This hardmask layer is then used in a pattern formation method involving photoresist layers and etching processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If existing lithographic techniques are used, then the process is simple and direct, but the pattern profile quality deteriorates in ultra-fine dimensions
Solution Approach 1:
The lithographic process is divided into multiple stages: forming a hardmask layer first, then applying photoresist layer, followed by separate etching steps. This segmentation allows each layer to be optimized for its specific function, improving overall pattern profile quality in ultra-fine dimensions while managing process complexity through systematic breakdown
Solution Approach 2:
A hardmask layer is introduced as an intermediary between the photoresist layer and the material layer to be etched. This intermediate layer provides enhanced etch resistance and structural support, enabling better pattern profile control during etching while the photoresist maintains its primary function of pattern definition
2Reliability
If a hardmask layer is formed using polymer-based organic layer composition, then etch resistance improves, but the process steps increase
Solution Approach 1:
The hardmask layer is formed in advance before the photoresist layer is applied. This preliminary action ensures that the etch resistance is established beforehand, allowing the subsequent photoresist and etching steps to proceed with improved reliability and pattern fidelity
Solution Approach 2:
The hardmask layer uses a polymer-based organic layer composition with specific chemical structures designed to provide superior etch resistance. This composite material approach combines the benefits of organic materials (ease of deposition, patternability) with enhanced chemical resistance for reliable etching
3Manufacturing precision
If photoresist layer is applied on hardmask layer, then pattern definition accuracy improves, but the overall process complexity increases
Solution Approach 1:
Different layers are assigned different functional qualities: the hardmask layer provides etch resistance and structural support, while the photoresist layer provides high-resolution pattern definition. This local optimization of properties for each layer's specific function improves overall pattern definition accuracy without requiring all layers to perform all functions
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 polymer-based hardmask layer demonstrates improved etch resistance and film flatness, enabling the formation of fine patterns with excellent profiles, even in the presence of etching gases, thus addressing the limitations of existing lithographic techniques.
Implementation Method 1
heat-treating the organic layer composition to form a hardmask layer
Implementation Method 2
exposing and developing the photoresist layer to form a photoresist pattern
Data Source
AI summary
A polymer, an organic layer composition, and a method of forming patterns, the polymer including a structural unit represented by Chemical Formula 1 or Chemical Formula 2: