Organometallic Resist Composition for Low-Dose Pattern Uniformity
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Solution Overview
Problem
Chemically amplified resists in semiconductor manufacturing face issues with acid diffusion leading to non-uniform patterns and increased surface roughness, and they degrade in normal usage environments, limiting their effectiveness with low light exposure.
Innovation Solution
A resist composition incorporating an organometallic compound and an additive, which enhances storage stability and allows pattern formation with low light doses, minimizing acid diffusion and chemical deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If chemically amplified resists are used to form fine patterns, then pattern formation capability is improved, but acid diffusion occurs causing non-uniform patterns and increased surface roughness
Solution Approach 1:
The patent extracts and removes the harmful photoacid generator component from the resist composition, using only the base resin and organometallic compound. This eliminates the source of acid diffusion while preserving the essential pattern formation functionality through alternative mechanisms.
Solution Approach 2:
The organometallic compound acts as an intermediary substance that mediates the interaction between light and the base resin. It absorbs light energy and transfers it to the resin in a controlled manner, preventing direct acid formation and diffusion while enabling pattern formation.
2Manufacturing precision
If chemically amplified resists are used for patterning, then pattern formation is enabled, but chemical deterioration occurs in normal usage environments
Solution Approach 1:
The patent employs a disposable resist composition that is chemically stable during storage and handling but undergoes controlled transformation during the brief exposure and development process. The composition is designed to be chemically inert during normal usage but activates only when exposed to light.
Solution Approach 2:
The resist composition utilizes parameter changes in the organometallic compound's oxidation state or molecular structure upon light exposure. This allows the material to remain chemically stable in its ground state during storage and handling, then undergo controlled transformation during the brief exposure and development process.
3Stability of the object's composition
If conventional resists are used, then storage stability is maintained, but response to low light doses is insufficient
Solution Approach 1:
The patent employs a disposable resist composition that is chemically stable during storage and handling but undergoes controlled transformation during the brief exposure and development process. The composition is designed to be chemically inert during normal usage but activates only when exposed to light.
Solution Approach 2:
The resist composition combines the base resin with the organometallic compound to create a composite material that exhibits both storage stability and enhanced light responsiveness. The organometallic component provides high quantum efficiency in converting light energy to chemical changes, enabling effective patterning with low light doses while maintaining stability during storage.
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 composition provides improved resolution and uniformity of patterns while maintaining chemical stability, even with low light exposure, reducing the risk of pattern non-uniformity and surface roughness.
Implementation Method 1
the resist composition is configured to change one or more physical properties even by exposure to incident light (e.g., high-energy rays)
Implementation Method 2
Y2—Z2 may be a photo-reactive unit
Data Source
AI summary
Provided are a resist composition including an organometallic compound represented by Formula 1 and an additive represented by Formula 2, and a pattern formation method using the same:Descriptions of M11, Rx, Ry, n, m, X2, Y2, Z2, L2, a2, b2, and c2 in Formulae 1 and 2 are provided in the specification.