Self-Segregating Antireflective Coatings for Semiconductor Substrates
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Solution Overview
Problem
Current methods for manufacturing segregated layers in semiconductor devices face challenges such as complex multi-layer processes, high costs, insufficient reflective indexes, etch rate limitations, and defects, particularly in achieving a silicon-rich surface with good uniformity and thermal stability.
Innovation Solution
A method involving the application of a composition comprising solvent, siloxane polymer, and high-carbon material on a substrate, followed by heating to form segregated antireflective and spin-on-carbon coatings, which self-segregate to create a silicon-rich surface with improved reflective indexes and etch resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate applying processes are used for multiple functional layers, then each layer can be optimized independently, but the fabrication process becomes complicated and time-consuming
Solution Approach 1:
The patent combines multiple functional layers (antireflective coating and spin-on-carbon coating) into a single multi-functional layer applied in one process step. This merging approach maintains the individual optimization benefits while significantly simplifying the fabrication process and reducing the number of processing steps required.
Solution Approach 2:
The patent creates a multi-functional layer that simultaneously provides antireflective properties and carbon coating functions. This universal layer performs multiple roles that previously required separate specialized layers, thereby reducing process complexity while maintaining optimal performance for each function.
2Device complexity
If a single application process is used for segregated layers, then the process is simplified, but it is difficult to achieve segregated layers with good properties
Solution Approach 1:
The patent uses a self-segregating composition where different components automatically separate into distinct regions within the single applied layer. The siloxane polymer segments form one region while the high-carbon material segments form another region, creating locally optimized zones with specific properties without requiring separate application processes.
Solution Approach 2:
The composition contains components that automatically self-segregate upon application and heating, without requiring external intervention or complex processing steps. The siloxane polymer and high-carbon material spontaneously separate into distinct phases, creating the desired layered structure through self-organization driven by thermodynamic factors.
3Ease of manufacture
If conventional compositions are used, then the process is simple, but reflective indexes and etch rates are insufficient
Solution Approach 1:
The patent employs a composite composition containing both siloxane polymer components (for antireflective properties) and high-carbon material components (for etch resistance and carbon coating functions). This composite approach maintains process simplicity while achieving superior reflective indexes and etch rates through the synergistic combination of different material properties.
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
This method simplifies the process by achieving segregated layers with a silicon-rich surface, enhanced reflective indexes, improved etch resistance, and reduced defects, while maintaining thermal stability and solvent resistance.
Implementation Method 1
heating said substrate to form segregated layers of antireflective coating made from siloxane polymer (B) and spin-on-carbon coating made from high-carbon material (C), where placed said antireflective coating, spin-on-carbon coating and substrate in this order
Data Source
AI summary
The present invention pertains to a method of manufacturing segregated layers above a substrate. The invention also pertains to methods of manufacturing a photoresist layer, photoresist patterns, a processed substrate and a device.