Brush Composition Preventing Agglomeration in Block Copolymer Films
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Solution Overview
Problem
The existing methods for forming a brush layer using block copolymers face challenges with agglomeration during high-temperature baking, leading to unsatisfactory contact angles and excessive film thickness.
Innovation Solution
A brush composition containing a resin component with a polymeric compound where a first polymer block and a second polymer block are bonded through a linking group with a substrate adhering group, which reduces agglomeration and enables the formation of a thin film brush layer with improved phase-separated structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If baking is conducted at high temperature (250-280°C) to form a brush layer, then the contact angle of the surface becomes satisfactory, but the brush layer agglomerates during the baking process
Solution Approach 1:
The polymeric compound is divided into multiple polymer blocks (first polymer block, second polymer block, etc.) with different functions. The first block provides adhesion to the substrate, the second block prevents agglomeration, and subsequent blocks control surface properties. This segmentation allows each block to perform its specific function independently, resolving the contradiction between achieving good contact angle and preventing agglomeration.
Solution Approach 2:
Different parts of the polymeric compound (different polymer blocks) are given different local properties. The first polymer block has adhesion properties for substrate bonding, while the second polymer block has anti-agglomeration properties. This local differentiation of properties within the single polymeric compound enables simultaneous achievement of adhesion and agglomeration prevention.
2Stability of the object's composition
If molecular weight of the polymeric compound is increased to prevent agglomeration, then agglomeration is reduced, but the film thickness of the brush layer becomes large
Solution Approach 1:
Instead of increasing the molecular weight of a single polymer chain, the invention segments the polymeric compound into multiple blocks with different functions. This allows prevention of agglomeration through specific block design (second polymer block) without necessarily increasing the overall film thickness, as each block contributes differently to the final film structure.
Solution Approach 2:
The invention changes the structural parameters of the polymeric compound by introducing a multi-block architecture with specific functional groups in each block, rather than simply increasing molecular weight. This parameter change enables agglomeration prevention while controlling film thickness through the specific design and length of each polymer block.
3Length of stationary object
If molecular weight of the polymeric compound is decreased to reduce film thickness, then film thickness becomes thin, but agglomeration occurs during baking
Solution Approach 1:
The polymeric compound is segmented into multiple functional blocks, where the second polymer block specifically addresses agglomeration prevention. This segmentation allows the use of lower molecular weight polymers (thinner films) while maintaining stability during baking through the anti-agglomeration function of the second block.
Solution Approach 2:
The polymeric compound functions as a composite material with multiple polymer blocks, each contributing different properties. The combination of blocks with different molecular weights and functions creates a composite structure that prevents agglomeration even when the overall film thickness is reduced.
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 solution effectively prevents agglomeration during high-temperature baking, resulting in a thin film brush layer with enhanced phase-separated structures and improved surface properties.
Implementation Method 1
a polymeric compound (A1) in which a first polymer block and a second polymer block are bonded to each other through a linking group containing a substrate adhering group
Implementation Method 2
a technology for processing a more delicate structure is demanded. In response to such demand, technical developments have been conducted on forming a fine structure using a phase-separated structure formed by self-assembly of block polymers having mutually incompatible blocks bonded together
Implementation Method 3
forming a fine structure using a phase-separated structure formed by self-assembly of block polymers
Implementation Method 4
a brush layer is formed by applying a brush composition to a substrate, and then a bake treatment at a temperature as high as about 250° C. to 280° C.
Data Source
AI summary
A method of producing a structure containing a phase-separated structure, the method including: applying a brush composition to a substrate to form a brush layer; forming a layer containing a block copolymer on the brush layer; and phase-separating the layer containing the block copolymer, the brush composition including a resin component (A), the resin component (A) containing a polymeric compound (A1) in which a first polymer block and a second polymer block are bonded to each other through a linking group containing a substrate adhering group.