Acrylate Adhesive Composition for Bubble-Resistant Display Bonding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing adhesive compositions for display devices face challenges in maintaining reliability due to bubble penetration during manufacturing processes, particularly during decompression stages, which affect adhesion and optical properties.
Innovation Solution
An adhesive composition is developed using a compound with a crosslinking structure at the terminal, formed from acrylate monomers with different sub-repeating units, including a hydroxyl group and an alkyl group, to minimize volume change and prevent bubble ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional adhesive compositions are used, then the adhesive layer can be formed, but bubble penetration occurs during decompression manufacturing processes
Solution Approach 1:
The patent changes the chemical composition parameters of the adhesive by incorporating specific repeating units with terminal crosslinking structures and controlling the ratio of hydroxyl-containing to alkyl-containing acrylate monomers (1:9 to 4:6), which modifies the volume change characteristics during curing to prevent bubble penetration
Solution Approach 2:
The adhesive composition uses a composite structure combining multiple types of acrylate monomers (hydroxyl-containing and alkyl-containing) with specific repeating units that form terminal crosslinking structures, creating a multi-component system that resists bubble penetration while maintaining adhesion
2Reliability
If the adhesive composition is optimized to prevent bubble penetration, then reliability increases, but the manufacturing process complexity increases
Solution Approach 1:
The patent incorporates photoinitiators and crosslinking agents into the adhesive composition before application, so that the terminal crosslinking structures are already prepared and will activate upon UV irradiation during the bonding process, eliminating the need for separate crosslinking steps
3Object-affected harmful factors
If terminal crosslinking structures are formed to minimize volume change, then bubble penetration is prevented, but adhesion properties may be compromised
Solution Approach 1:
The patent creates local crosslinking structures only at the terminal positions of the polymer chains rather than throughout the entire chain structure, maintaining flexibility and adhesion in the main chain while providing volume stability at the terminals to prevent bubble penetration
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 adhesive layer with terminal crosslinking structure effectively prevents bubble penetration, enhancing adhesion and optical properties, thereby increasing the reliability of the display device.
Implementation Method 1
an additive including a photoinitiator
Implementation Method 2
a compound including a repeating unit derived from an acrylate monomer, and an additive including a photoinitiator... a second repeating unit that forms a crosslinking structure at at least one terminal
Data Source
AI summary
An adhesive composition includes a compound including a repeating unit derived from an acrylate monomer and an additive including a photoinitiator. As a terminal of the compound included in the adhesive composition is cured and a crosslinking structure is formed, volume change of a compound forming an adhesive layer is reduced, thereby preventing bubbles from penetrating into the adhesive layer from outside.