Opposite Substrate with Spacer Pillars for OLED Packaging
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Solution Overview
Problem
Current OLED display panel packaging methods using adhesive packages face challenges with excessive adhesive deposition and contact resistance due to the lack of effective spacing and conductivity enhancement between substrates.
Innovation Solution
The use of an opposite substrate with spacer pillars, an auxiliary electrode layer, and a lubricant layer containing nanoparticles coated with hydrophilic organic materials, which reduces contact resistance and prevents adhesive infiltration, enhancing conductivity and preventing scratches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive package is used to package OLED display panel, then packaging is completed, but excessive adhesive deposition and contact resistance occur
Solution Approach 1:
The invention introduces spacer pillars that segment the adhesive package into multiple regions, creating controlled adhesive deposition zones and non-adhesive zones. This segmentation prevents excessive adhesive spread while ensuring adequate contact between substrates, thereby reducing contact resistance without requiring excessive adhesive material.
Solution Approach 2:
The spacer pillars create local quality differences in the package structure, with hydrophilic regions (spacer pillars and adjacent areas) and hydrophobic regions (other areas). This local quality variation controls adhesive distribution, preventing excessive deposition in critical contact areas while maintaining reliable electrical contact where needed.
2Reliability
If adhesive is applied between substrates, then packaging is achieved, but adhesive infiltration causes scratches and reliability issues
Solution Approach 1:
The hydrophilic spacer pillars are positioned in advance to preemptively block adhesive infiltration paths. By placing these pillars before adhesive application, the invention creates predetermined barriers that prevent adhesive from reaching sensitive areas where it could cause scratches or reliability issues.
Solution Approach 2:
The spacer pillars act as intermediary elements between the substrates, mediating the adhesive package process. They provide a physical and chemical interface that controls adhesive behavior, preventing direct contact between excessive adhesive and sensitive electrode regions, thereby preventing scratches while maintaining package integrity.
3Reliability
If spacer pillars are added to control adhesive, then adhesive infiltration is prevented, but device complexity increases
Solution Approach 1:
The spacer pillars serve multiple functions simultaneously: they provide mechanical spacing, control adhesive distribution through hydrophilic properties, prevent adhesive infiltration, and maintain electrode alignment. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving comprehensive adhesive control.
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 solution improves the conductivity and reduces contact resistance between the auxiliary electrode and top electrodes, preventing adhesive infiltration and ensuring effective packaging of OLED display panels.
Implementation Method 1
surfaces of the nanoparticles are wrapped by hydrophilic organic materials
Implementation Method 2
a lubricant layer. The lubricant layer covers portions of the auxiliary electrode layer corresponding to the spacer pillars
Data Source
AI summary
The present disclosure provides an opposite substrate. The opposite substrate includes a substrate. The opposite substrate includes spacer pillars distributed on the substrate as an array. The opposite substrate includes an auxiliary electrode layer covering the spacer pillars and the substrate, and a lubricant layer. The lubricant layer covers portions of the auxiliary electrode layer corresponding to the spacer pillars.