Transparent Electrode Contour Matching Glass Plate Mask
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Solution Overview
Problem
The existing methods for forming transparent electrodes in organic EL display devices face challenges in accurately controlling the position of the electrodes, leading to design constraints and increased manufacturing costs due to the use of masks.
Innovation Solution
A display device design where a transparent electrode is formed with a contour matching a glass plate, and the glass plate is used as a mask for etching, eliminating the need for additional masks and reducing manufacturing costs by allowing for more design flexibility and avoiding the use of masks in forming the cathode electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a mask is used to form the transparent electrode, then the electrode can be formed with defined boundaries, but the position control becomes difficult and manufacturing cost increases
Solution Approach 1:
The patent extracts the masking step from the electrode formation process by using the glass plate itself as the boundary-defining element. The glass plate's physical presence serves as the mask, eliminating the need for separate masking materials and steps, thereby improving position control while reducing device complexity
Solution Approach 2:
The glass plate serves multiple functions: it acts as both the structural cover component and the masking element during electrode formation. This multi-functionality eliminates the need for dedicated masking materials, simplifying the overall device structure and improving manufacturing precision
2Manufacturing precision
If a mask is used in the transparent electrode formation step, then the electrode pattern can be defined, but the manufacturing cost rises
Solution Approach 1:
The patent merges the glass plate placement step with the electrode pattern definition function. By positioning the glass plate to cover specific areas, the electrode formation is automatically constrained to the desired pattern without requiring additional masking materials, thereby defining the electrode pattern while reducing manufacturing cost
Solution Approach 2:
The glass plate serves its own structural purpose while simultaneously providing the masking function needed for electrode pattern definition. This self-service approach eliminates the need for separate masking components, reducing material costs and simplifying the manufacturing 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
This approach reduces design constraints and lowers manufacturing costs by enabling precise positioning of the transparent electrode and eliminating the need for mask-related expenses and material contamination, while also protecting the organic light emitting layer from etching chemicals.
Implementation Method 1
etching the transparent electrode with the glass plate as a mask
Data Source
AI summary
A display device includes a substrate, a light emitting layer including one or more kinds of organic light emitting films, a transparent electrode that comes in contact with an upper surface of the light emitting layer, and a glass plate that covers an upper side of the transparent electrode, in which the transparent electrode has a contour corresponding to a contour of the glass plate in a plan view.