Polysiloxane Composition for Thick Crack-Resistant Cured Films
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Solution Overview
Problem
Existing materials for forming planarization films in optical devices, such as polysiloxanes, face challenges in achieving high heat resistance and preventing cracking when thickened, while maintaining excellent pattern formation and transparency.
Innovation Solution
A polysiloxane composition comprising specific repeating units and a solvent, applied and cured on a substrate, which forms a highly heat-resistant, crack-free film with excellent transmitting properties and pattern formation capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If polysiloxane is used to form planarization films with high heat resistance and transparency, then heat resistance and transmittance are improved, but cracking occurs when the film is thickened
Solution Approach 1:
The patent changes the chemical structure parameters of polysiloxane by introducing specific repeating units with silane groups that can form crosslinked networks. This structural modification allows the film to maintain flexibility and resistance to cracking even at thicknesses of 1 μm or more, while preserving high heat resistance and transparency
Solution Approach 2:
The patent creates a composite structure within the polysiloxane film by incorporating multiple types of repeating units (formula Ia and Ib) that work together. The silane-containing units form crosslinked networks that reinforce the film structure, preventing cracks while maintaining the inherent heat resistance and optical properties of polysiloxane
2Shape
If planarization film thickness is increased to improve planarity on large concavo-convex substrates, then planarity is improved, but cracking occurs in the film
Solution Approach 1:
The patent modifies the molecular structure of polysiloxane by incorporating repeating units with silane groups that can form crosslinked networks. This structural change enables the film to accommodate thickness increases (1 μm or more) required for planarization without developing cracks, while maintaining film integrity
Solution Approach 2:
The patent incorporates crosslinkable silane groups into the polysiloxane structure before film formation. During curing, these groups form crosslinked networks that pre-reinforce the film structure, preventing crack formation as the film is applied over concavo-convex substrates and achieves planarity
3Manufacturing precision
If wiring complexity increases to improve resolution and frame frequency, then display quality is improved, but planarization becomes more severe and difficult to achieve
Solution Approach 1:
The patent changes the material properties of the planarization film by using modified polysiloxane with crosslinking capability. This enables formation of thick, crack-free films that provide superior planarization, simplifying the manufacturing process even as wiring complexity increases for higher resolution displays
Solution Approach 2:
The patent uses a composite polysiloxane structure with multiple repeating units that provide both the thickness needed for planarization and the crosslinked network for crack prevention. This material combines the properties needed to handle complex wiring patterns while maintaining ease of manufacture
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 polysiloxane composition effectively forms a cured film that is highly heat-resistant, minimizes cracking, and maintains excellent transmitting properties, enabling the formation of high-quality patterns suitable for optical devices.
Implementation Method 1
The method for producing a cured film according to the present invention comprises applying the above-mentioned composition on a substrate and heating it
Implementation Method 2
maintains excellent transmitting properties, enabling the formation of high-quality patterns suitable for optical devices
Data Source
AI summary
[Problem] To provide a polysiloxanecapable of forming a cured film of a thick film with high heat resistance, a composition comprising the polysiloxane, and a method of manufacturing a cured film using the composition. [Means for Solution] To provide a polysiloxane comprising a repeating unit represented by the following formula (Ib), wherein R2 is each independently hydrogen, alkyl, aryl, alkenyl, and the like, a composition comprising the polysiloxane, and a method of manufacturing a cured film using the composition.