Structured Barrier Film for Electronic Device Protection
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Solution Overview
Problem
Conventional barrier films are ineffective in preventing moisture and oxygen ingress into electronic devices from the x and y directions due to the adhesive used, which creates channels for moisture ingress, necessitating a solution that provides comprehensive protection across all directions.
Innovation Solution
A structured film comprising a resin layer with microscale features, a barrier layer, and adhesive layers that extend across the device's surface, forming a comprehensive barrier in the x, y, and z directions, eliminating the need for additional sealing and protecting sensitive devices like OLEDs from environmental gases and liquids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive layers are used to attach barrier films to electronic devices, then bonding strength is improved, but moisture and oxygen ingress channels are created in the x and y directions
Solution Approach 1:
The barrier film structure transitions from a conventional 2D planar configuration to a 3D structured configuration with raised features. This dimensional change allows the barrier to extend vertically (z-direction) while maintaining adhesive bonding, creating a three-dimensional protective architecture that blocks moisture and oxygen pathways in multiple directions simultaneously.
Solution Approach 2:
The barrier film is segmented into multiple functional zones: adhesive regions for bonding, raised barrier features for blocking moisture/oxygen pathways, and controlled transition zones. This segmentation allows different portions of the film to perform specialized functions - bonding in some areas and blocking in others - resolving the contradiction between adhesion and barrier performance.
2Reliability
If additional barrier films and edge sealing are used to prevent moisture ingress, then protection completeness is improved, but device complexity increases
Solution Approach 1:
The structured barrier film integrates multiple functions into a single component: it provides adhesive bonding, moisture/oxygen barrier protection, and edge sealing capabilities simultaneously. The raised features create natural sealing edges that eliminate the need for separate sealing structures, achieving comprehensive protection while reducing overall device complexity.
Solution Approach 2:
The invention merges the barrier layer and adhesive layer into an integrated structured film where the raised barrier features and adhesive regions are combined in a single component. This consolidation eliminates the need for separate barrier films and sealing structures, achieving comprehensive protection with reduced complexity.
Data Source
AI summary
A film including a resin layer comprising a structured major surface opposite a second major surface, the structured major surface including a plurality of features; a barrier layer on the structured major surface; and a first adhesive layer on the barrier layer.