Thermal Processing Device for DSA Film Microphase Separation
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Solution Overview
Problem
Conventional Directed Self Assembly (DSA) techniques often fail to achieve appropriate microphase separation, resulting in undesired patterns during substrate processing.
Innovation Solution
A thermal processing device that uses a heater, chamber, gas supplier, and mover to control the substrate's position within a solvent-containing atmosphere, neutralizing the environment before thermal processing to facilitate microphase separation of DSA materials, ensuring only one polymer type contacts the atmosphere, thereby promoting appropriate microphase separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional DSA technique is used without atmosphere neutralization, then the processing is simpler, but appropriate microphase separation cannot occur and desired patterns cannot be acquired
Solution Approach 1:
The invention applies preliminary action by neutralizing the atmosphere with solvent-containing gas before performing thermal processing. This pre-treatment step modifies the atmospheric environment to have affinities close to one another, preventing preferential contact with either polymer type, thereby enabling appropriate microphase separation during subsequent heating.
Solution Approach 2:
The invention creates an inert-like environment by using solvent-containing gas that neutralizes the atmospheric composition. The solvent molecules interact with both polymer types equally, effectively creating a chemically neutral atmosphere that does not bias the microphase separation process toward either polymer component.
2Manufacturing precision
If thermal processing is performed immediately without atmosphere neutralization, then the processing time is shorter, but microphase separation does not occur appropriately
Solution Approach 1:
The atmosphere neutralization step is performed as a preliminary action before thermal processing. By pre-equilibrating the atmosphere with solvent-containing gas, the system prepares the optimal environment for microphase separation, ensuring that when heating begins, the separation can proceed correctly without requiring extended processing time to compensate for atmospheric interference.
3Productivity
If the substrate is held at high temperature continuously, then microphase separation occurs faster, but the atmosphere interference prevents appropriate separation
Solution Approach 1:
The invention creates a neutral atmospheric environment using solvent-containing gas that does not preferentially interact with either polymer type. This inert-like atmosphere allows the thermal processing to proceed at high temperature for rapid microphase separation without the atmosphere interfering with the separation quality, thus achieving both speed and precision.
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 enables accurate and efficient microphase separation of DSA materials, leading to the formation of precise patterns on substrates without defects, improving the quality of substrate processing.
Implementation Method 1
a heater that performs the thermal processing on the substrate at a preset thermal processing temperature
Implementation Method 2
a gas supplier that supplies a solvent containing gas including an organic solvent into the chamber
Data Source
AI summary
A heating plate is stored in a chamber. With a solvent containing gas present in the chamber, a substrate on which a DSA film is formed is held at a position further upward than the heating plate. Thus, neutralization of an atmosphere is performed at a temperature at which microphase separation does not occur. Thereafter, with the solvent containing gas present in the chamber, the substrate is held on an upper surface of the heating plate. Thus, thermal processing is performed on the DSA film on the substrate.