Transparent Oxide LED Display Layout for Crack-Free Adhesive Etching
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Solution Overview
Problem
The manufacturing process of light-emitting diode (LED) display panels faces challenges with adhesive layer etching, which can damage the second adhesive layer and cause cracking, leading to poor connection of LEDs with the driving backplane and reduced manufacturing yield.
Innovation Solution
A display apparatus and manufacturing method that include a transparent metal oxide pattern layer with solid portions and openings, where light-emitting elements are positioned in the openings, and transparent structures cover the elements while exposing their electrodes. This configuration protects the adhesive layer during etching and ensures proper alignment and connection of LEDs to the driving backplane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If etching gas is used to remove the remaining portion of the first adhesive layer, then the adhesive layer can be cleaned, but the second adhesive layer is damaged causing cracking
Solution Approach 1:
The patent introduces a protective film as an intermediary layer between the etching gas and the second adhesive layer. This protective film selectively protects the second adhesive layer from etching gas damage while allowing the first adhesive layer to be removed, thus resolving the contradiction between cleaning precision and adhesive layer integrity
Solution Approach 2:
The protective film is selectively formed only in regions where the second adhesive layer needs protection during etching. This local application of protection allows differential treatment of different adhesive layers, enabling precise removal of the first adhesive layer while preserving the second adhesive layer
2Ease of manufacture
If etching is performed to remove adhesive patterns, then adhesive patterns are eliminated, but the second adhesive layer suffers cracking damage
Solution Approach 1:
The protective film acts as a mediator during the etching process, enabling easy removal of adhesive patterns while protecting the second adhesive layer from cracking. The protective film is selectively positioned to shield vulnerable areas during pattern removal operations
Data Source
AI summary
A display apparatus includes a driving backplane, a transparent metal oxide pattern layer, light-emitting elements and transparent structures. The transparent metal oxide pattern layer has a solid portion and openings defined by the solid portion. The light-emitting elements are respectively located in the openings of the transparent metal oxide pattern layer. The transparent structures respectively cover the light emitting elements, respectively overlap the openings of the transparent metal oxide pattern layer, and expose electrodes of the light emitting elements. The transparent structures are located between the light emitting elements and the driving backplane. Moreover, a manufacturing method of the display apparatus is also provided.