Flexible OLED Panel Laser Separation Stress Control
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Solution Overview
Problem
The separation of a layered body from a support substrate in OLED panel production often results in wrinkles or curls due to stress in the films, which complicates subsequent handling and reduces production efficiency.
Innovation Solution
A production method for OLED panels involves forming a layered body on a transparent substrate with a resin layer, a TFT layer, and a sealing layer, and then irradiating the resin layer with a laser beam of varying intensities to control stress release, ensuring the organic sealing film and inorganic sealing films are treated differently to mitigate stress-induced wrinkles or curls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the layered body is separated from the support substrate using a laser beam, then the OLED panel can be detached from the substrate, but wrinkles or curls are generated in the layered body due to stress
Solution Approach 1:
The patent applies local quality by differentiating the laser irradiation intensity across different regions of the resin layer. The first region (overlapping with organic sealing film) receives laser at a first intensity, while the second region (not overlapping with organic sealing film) receives laser at a second intensity greater than the first intensity. This localized differentiation allows stress release in the second region without damaging the organic sealing film in the first region, thereby preventing wrinkles and curls while enabling successful separation.
2Device complexity
If uniform laser intensity is applied to the resin layer, then the separation process is simple, but stress-induced wrinkles or curls cannot be effectively controlled
Solution Approach 1:
The patent implements local quality by dividing the resin layer into two distinct regions with different laser irradiation intensities. The control unit selectively applies a first intensity to the first region (where the organic sealing film is located) and a second, higher intensity to the second region (where no organic sealing film exists). This localized approach enables effective stress control and wrinkle prevention while maintaining reasonable process complexity through automated 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
This method effectively reduces the risk of wrinkles or curls in the separated layered body, enhancing the flexibility and handling of the OLED panels and improving production efficiency.
Implementation Method 1
irradiating the resin layer being in contact with the transparent substrate with a laser beam to separate the transparent substrate and the layered body
Implementation Method 2
irradiating the resin layer with a laser beam of varying intensities to control stress release
Data Source
AI summary
A production method for an OLED panel includes forming on an upper face side of a transparent substrate, a layered body including a resin layer, a TFT layer, an OLED layer and a sealing layer including an organic sealing film, and then irradiating the resin layer being in contact with the transparent substrate with a laser beam to separate the transparent substrate and the layered body. In the production method, the resin layer includes a first region to be irradiated with a laser beam at a first intensity P1 and a second region to be irradiated with a laser beam at a second intensity P2 greater than the first intensity, the first region overlaps with the organic sealing film, and the second region does not overlap with the organic sealing film.