Encapsulation Tool for Organic Electronics
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Solution Overview
Problem
Current encapsulation processes for organic electronic devices result in highly variable performance parameters and low process yields due to challenges in accurately controlling the placement and curing of sealant materials under varying temperature, pressure, and ambient conditions, leading to potential defects from internal pressure issues.
Innovation Solution
A device comprising a housing and a lid that defines a sealed space, equipped with a controller to manage internal pressure, temperature, and gas environment, along with alignment cameras and a UV curing station for precise encapsulation, ensuring accurate placement and sealing of organic electronic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If encapsulation is performed in a controlled environment, then placement accuracy of sealant materials is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-positioning alignment markers and fiducials on the device and encapsulation tool before the encapsulation process. These markers enable automated alignment and positioning systems to accurately locate the device and plan the sealant dispensing path in advance, improving placement accuracy without requiring complex real-time environmental adjustments during the actual encapsulation process.
Solution Approach 2:
The patent replaces manual mechanical alignment procedures with an automated optical alignment system using cameras and image processing. Instead of relying on mechanical adjustment mechanisms that are sensitive to environmental variations, the system uses optical detection of fiducials to computationally determine positions and generate precise dispensing paths, reducing the impact of environmental controls on placement accuracy.
2Reliability
If internal pressure is controlled during encapsulation, then seal integrity is improved, but process complexity increases
Solution Approach 1:
The patent applies preliminary action by performing vacuum sealing of the encapsulation chamber before the sealant dispensing process. This pre-vacuuming step removes air and prevents pressure buildup during encapsulation, eliminating the need for complex real-time pressure control mechanisms while ensuring seal integrity. The vacuum state is maintained throughout the process, and only atmospheric pressure is applied after curing.
Solution Approach 2:
The patent creates an inert vacuum environment within the encapsulation chamber, removing atmospheric air that would otherwise create pressure differentials and interfere with sealant curing. This vacuum inert environment eliminates pressure-related defects and allows the sealant to cure properly without complex pressure regulation, improving seal integrity through environmental control rather than active pressure management.
3Manufacturing precision
If temperature and pressure are controlled during encapsulation, then sealant curing quality is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies parameter changes by utilizing the temperature and pressure differentials that naturally occur during vacuum sealing and sealant dispensing. Instead of actively controlling and expending energy to maintain precise temperature and pressure, the system allows these parameters to vary within acceptable ranges while using vacuum conditions to facilitate sealant flow and curing. This approach achieves adequate curing quality without the high manufacturing costs of active environmental control systems.
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
This solution enhances process yield by providing a controlled environment for encapsulation, reducing defects and improving the reliability of organic electronic devices by ensuring accurate pressure, temperature, and gas control during the encapsulation process.
Implementation Method 1
a UV curing station to finish the sealing process
Data Source
AI summary
Methods and devices are provided for improving the encapsulation processes for an organic electronic device.