Display Device Terminal Formation via Mask Etching
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Solution Overview
Problem
The existing methods for forming terminal portions in display devices, such as those with organic EL elements, are inefficient, leading to low production efficiency.
Innovation Solution
A display device production method that involves arranging first and second masks over a conductive film in both active and non-active regions to etch the film, reducing the number of processes required for terminal formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple separate processes are used to form the terminal portion and electrode region, then the terminal can be properly formed, but the production efficiency decreases due to the large number of processes
Solution Approach 1:
The patent combines the terminal portion formation and electrode region formation into a single etching process. By using a single mask structure that covers both the terminal portion and electrode region, the conductive film is etched in one operation to create both features simultaneously, eliminating the need for multiple separate etching processes and thereby improving production efficiency while maintaining manufacturing precision
2Productivity
If a single etching process is used to form both terminal and electrode regions, then production efficiency improves, but the manufacturing complexity of the mask structure increases
Solution Approach 1:
The mask structure is segmented into distinct functional regions: a first mask portion that overlaps the terminal portion and a second mask portion that overlaps the electrode region. This segmentation allows each region to be optimized independently while being part of a single integrated mask structure, reducing the overall complexity compared to multiple separate masks while maintaining the ability to control both terminal and electrode formation in one process
Data Source
AI summary
A display device production method for producing a display device including a light emitting element in an active region and a terminal in a non-active region. The display device production method includes arranging a first mask overlapping with an electrode region of the light emitting element and a second mask overlapping with the terminal, on a conductive film that is arranged in the active region and the non-active region and that covers the terminal, and etching the conductive film.