Alternating Polysilazane and Polysiloxane Protective Film
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Solution Overview
Problem
Current protective films for display devices and flexible substrates face challenges in preventing moisture and oxygen permeation while maintaining flexibility and cost-effectiveness, as they often require expensive deposition equipment and complex procedures.
Innovation Solution
A protective film comprising alternating layers of polysilazane-based and polysiloxane-based polymers, which react to form silica at low temperatures, enhancing adhesion and preventing moisture and oxygen permeation, and can be produced through low-temperature wet processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inorganic materials are deposited to form inorganic layers with polymer intercalation, then moisture barrier performance is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The protective film is segmented into multiple alternating layers of polysilazane-based polymer and polysiloxane-based polymer, where each layer provides specific functional properties. The polysilazane layers provide moisture barrier through silica formation, while polysiloxane layers provide flexibility and adhesion, creating a layered structure that achieves superior moisture barrier performance without complex inorganic deposition procedures
Solution Approach 2:
The invention uses composite materials by combining polysilazane-based polymer and polysiloxane-based polymer in alternating layers. This composite structure leverages the moisture barrier properties of polysilazane (which forms silica) and the flexibility/adhesion properties of polysiloxane, achieving both protection and manufacturability without expensive deposition equipment
2Illumination intensity
If polysilazane is cured to form silica thin film, then transparency and antifouling properties are improved, but moisture permeation prevention ability deteriorates
Solution Approach 1:
The protective film applies local quality by using polysilazane-based polymer specifically where moisture barrier is needed (forming silica layers), while using polysiloxane-based polymer where flexibility and adhesion are needed. Each material is positioned where its specific properties are most beneficial, with polysilazane providing hydrophobic silica formation for moisture barrier and polysiloxane providing flexibility to prevent cracking
Solution Approach 2:
By creating a composite structure of alternating polysilazane and polysiloxane layers, the invention combines the transparency and antifouling properties of polysilazane-derived silica with the flexibility and adhesion of polysiloxane, achieving both optical clarity and effective moisture barrier performance
3Reliability
If inorganic material deposition is used, then protective film performance is improved, but manufacturing cost increases
Solution Approach 1:
The invention replaces expensive mechanical deposition systems with simple coating processes. Instead of requiring vacuum deposition or chemical vapor deposition equipment, the polysilazane-based polymer can be applied using conventional coating methods and cured at low temperatures, significantly reducing manufacturing cost while maintaining protective film performance
Solution Approach 2:
The invention changes the processing parameters by using low-temperature curing (below 100°C) instead of high-temperature processing. This parameter change allows the use of conventional low-cost equipment while achieving effective crosslinking and silica formation, eliminating the need for expensive high-temperature furnaces or deposition chambers
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 film effectively prevents moisture and oxygen permeation while maintaining flexibility, making it suitable for use in electronic devices and display devices without the need for expensive equipment, and can be produced at a lower cost.
Implementation Method 1
polysilazane is cured to form a hydrophilic silica (SiO2) thin film
Implementation Method 2
polysilazane-based polymer and a flexible polysiloxane-based polymer wherein the polysilazane-based polymer is cured at low temperature to form silica
Implementation Method 3
The protective film has improved adhesion at the interface between the respective coating films to prevent permeation of moisture and oxygen through the protective film
Implementation Method 4
the intercalation of the polymer layer makes the procedure more complex... polysiloxane-based polymer... achieves flexibility
Data Source
AI summary
Disclosed herein is a protective film. The protective film is produced by alternate coating of a polysilazane-based polymer and a flexible polysiloxane-based polymer. The polysilazane-based polymer is cured at low temperature to form silica, thereby achieving high hardness and high light transmittance. The protective film has improved interfacial adhesion between the respective coating films, which prevents permeation of moisture and oxygen. In addition, the protective film can be easily produced by low-temperature wet processes. Also disclosed herein is an encapsulation material comprising the protective film.