Polycycloolefin Encapsulation Composition for Flexible OLED Protection

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Solution Overview

Problem

Existing polycycloolefin layers in electronic devices, particularly organic electronic devices, are susceptible to environmental factors like oxygen and moisture, leading to degradation, and mechanical stresses from folding or bending can cause fractures, while current compositions lack transparency, flexibility, and effective protection against invisible wavelengths.

Innovation Solution

A composition comprising monomers, a latent organo-transition metal catalyst, a compound that releases a Bronsted acid under photolytic conditions, and an absorber with a maximum absorption wavelength between 280-410 nm, which forms a polycycloolefin layer that is transparent, flexible, and protective against environmental factors.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of moving object

If conventional polycycloolefin layers are used in organic electronic devices, then the devices can be made thinner and more flexible, but the layers are susceptible to environmental factors (oxygen and moisture) causing degradation

Engineering Contradiction:

Improvedevice thicknessVSAvoidprotection against environmental factors

Core Design Contradiction:

Length of moving objectVSReliability

Solution Approach 1:

The patent uses a composite composition containing cycloolefin monomers, latent catalyst, Bronsted acid generator, and absorber compounds to create a polycycloolefin layer with enhanced protective properties. This composite material structure provides both flexibility for thin device construction and reliability through protection against oxygen and moisture degradation.

Inventive Principle:

Principle #40Composite materials

2Reliability

If polycycloolefin layers are made to protect against environmental factors, then reliability improves, but mechanical stresses from folding and bending can still cause fractures

Engineering Contradiction:

Improveprotection against environmental factorsVSAvoidresistance to mechanical stress

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent modifies the polymerization parameters by controlling the catalyst activation conditions and monomer structure to produce a polycycloolefin layer with optimized mechanical properties. The resulting polymer has both protective functionality and sufficient flexibility to withstand folding and bending stresses without fracturing.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If existing compositions are used for polycycloolefin layer formation, then the layers can provide basic protection, but they lack transparency and effective blocking of invisible wavelengths

Engineering Contradiction:

Improveprotective functionVSAvoidtransparency and wavelength blocking

Core Design Contradiction:

ReliabilityVSIllumination intensity

Solution Approach 1:

The patent introduces absorber compounds as intermediary substances within the polycycloolefin layer composition. These absorbers selectively block invisible wavelengths (UV and blue light) while maintaining visible light transparency, thus protecting the underlying OLED layers from harmful radiation without compromising display quality.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Illumination intensity

If a composition includes an absorber with maximum absorption wavelength between 280-410 nm, then invisible wavelengths are blocked, but the composition complexity increases

Engineering Contradiction:

Improvewavelength blockingVSAvoidcomposition complexity

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

The absorber compounds used in the patent serve multiple functions: they block harmful invisible wavelengths (UV and blue light), maintain compatibility with the latent catalyst system, and preserve the transparency and flexibility needed for thin device construction. This multi-functionality justifies the added composition complexity by delivering multiple protective benefits from a single additive class.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 enables a transparent, flexible, and protective polycycloolefin layer that blocks invisible wavelengths, protects underlying layers from damage, and ensures good permittivity and processability, resulting in a smooth, homogenous, and pinhole-free encapsulation layer.

Implementation Method 1

a compound capable of releasing a Bronsted acid when subjected to photolytic conditions

Methodology Applied

Scientific EffectPhotolytic conditions: Photodissociation

Implementation Method 2

an absorber compound having a maximum absorption wavelength between 280-410 nm

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Implementation Method 3

a single component composition which is able to undergo mass polymerization under the OLED device fabrication conditions

Methodology Applied

Scientific EffectMass polymerization: Photopolymerisation

Data Source

PatentEP4396259B1composition

Publication Date: 2026.02.04 MERCK PATENT GMBH

AI summary

The present application relates to a composition comprising some components; using thereof; manufacturing a layer; and manufacturing an electronic device.