Flexible OLED Buffer Layer Laser Stripping
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Solution Overview
Problem
Current flexible OLED display manufacturing processes using 308 nm lasers damage switch elements due to the inability of polyimide films to absorb the laser, leading to increased production costs and reduced display effectiveness.
Innovation Solution
Incorporating a light absorbing material, such as Ti-MOF, into the buffer layer to absorb the stripping laser, which is configured to separate the polyimide film from the glass substrate, thereby protecting switch elements and improving the display's resolution and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a 308 nm laser is used for stripping the polyimide film from the glass substrate, then the polyimide film can be separated, but the switch elements are damaged because the polyimide film cannot absorb the laser
Solution Approach 1:
An intermediate buffer layer is introduced between the polyimide film and the switch elements. This buffer layer contains light-absorbing materials (such as TiO2, SiO2, or Si3N4) that absorb the 308 nm laser energy, preventing the laser from reaching and damaging the switch elements while still allowing the polyimide film to be stripped from the glass substrate.
Solution Approach 2:
The invention converts the harmful laser energy that would otherwise damage the switch elements into a beneficial effect by using the light-absorbing buffer layer to dissipate the laser energy through controlled absorption and heat generation, which facilitates the stripping process while protecting the underlying components.
2Productivity
If the polyimide film does not absorb the stripping laser, then the laser can pass through to separate the polyimide film, but the switch elements below are damaged
Solution Approach 1:
The buffer layer acts as an intermediary that selectively absorbs the laser energy. It is positioned between the polyimide film and the switch elements, allowing the laser to pass through the polyimide film for effective stripping while intercepting and absorbing the laser energy before it can damage the switch elements.
Solution Approach 2:
The buffer layer is designed with specific local properties - it contains light-absorbing materials concentrated in the region where laser energy needs to be absorbed. This creates a localized zone of energy absorption that protects the switch elements without interfering with the overall stripping process.
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 use of Ti-MOF in the buffer layer effectively absorbs the stripping laser, preventing damage to switch elements and reducing production costs while enhancing the display's performance and resolution.
Implementation Method 1
a starting material of the buffer layer is doped with a light absorbing material, and the light absorbing material is configured to absorb a stripping laser
Data Source
AI summary
The present disclosure provides a flexible organic light emitting diode display and a manufacturing method thereof. The manufacturing method includes: a polyimide film, a buffer layer, a switch array layer, as well as an organic light emitting display layer successively located below the polyimide film in that a starting material of the buffer layer is doped with a light absorbing material. A stripping laser is configured to separate the polyimide film from a glass substrate used during manufacturing, so as to obtain a flexible organic light emitting diode display.