Carbide Pattern on Resin Layer for Display Peeling
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Solution Overview
Problem
The process of irradiating the lower face of a resin layer with laser light and peeling a glass substrate in display device production can lead to electrical charging of the layered body, negatively impacting the light emitting element layer.
Innovation Solution
A display device is designed with a carbide pattern on the lower face of the resin layer, where the second region has a higher carbide amount per unit area than the first region, formed by varying laser irradiation conditions to prevent electrical charging and adjust adhesiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If laser light is used to peel the glass substrate from the resin layer, then the glass substrate can be effectively removed, but the layered body becomes electrically charged which negatively impacts the light emitting element layer
Solution Approach 1:
A lower face film is introduced as an intermediary layer between the resin layer and the external environment. This film serves as a mediator that prevents electrical charging of the layered body during laser irradiation, thereby protecting the light emitting element layer while allowing the glass substrate to be effectively removed
Solution Approach 2:
The patent converts the harmful electrical charging effect caused by laser irradiation into a beneficial process by controlling the formation of a carbide pattern on the resin layer. This pattern, created by the laser, actually prevents further electrical charging while maintaining the effectiveness of the substrate removal process
2Productivity
If uniform laser irradiation is applied to the resin layer, then the glass substrate can be peeled off, but electrical charging occurs across the entire surface
Solution Approach 1:
Instead of uniform irradiation, the patent applies laser light selectively to create a carbide pattern at specific locations on the resin layer. This localized approach forms regions with different carbide concentrations, where the patterned areas prevent electrical charging while maintaining peeling efficiency in the irradiated zones
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 carbide pattern effectively inhibits electrical charging of the display device, ensuring stable operation of the light emitting element layer.
Implementation Method 1
a lower face of the resin layer is irradiated with laser light from a reverse face of the glass substrate
Implementation Method 2
the lower face of the resin layer is irradiated with laser light
Implementation Method 3
the carbide pattern formed on the lower face of the resin layer can inhibit the display device from becoming electrically charged
Data Source
AI summary
A display device, which includes a lower face film, a TFT layer, and a light emitting element layer, includes a resin layer provided above the lower face film and below the TFT layer. A first region and a second region are included in a lower face of the resin layer, and the second region is a carbide pattern in which an amount of carbide per unit area is greater than an amount of carbide per unit area in the first region.