Thin Film Transistor Substrate Partition Wall Hole Control
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Solution Overview
Problem
The manufacturing process of liquid crystal display apparatuses is complex due to difficulties in aligning and controlling the size of holes in color filters, particularly when these filters are separately manufactured and attached to thin film transistor substrates, leading to issues with over-exposure or non-exposure during lithographic processes.
Innovation Solution
A thin film transistor substrate design that includes a color filter layer with a through-hole divided by a partition wall, creating multiple sub-holes for precise electrical connections, allowing for easier control of hole sizes and improving alignment during manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional lithographic exposure and developing processes are used to form holes in the color filter, then the color filter can be manufactured, but it is difficult to control the size of the hole due to over-exposure or non-exposure
Solution Approach 1:
The single hole in the color filter is divided into multiple sub-holes by introducing a partition wall structure. This segmentation allows each sub-hole to be formed with more precise dimensional control, avoiding the size control issues that occur with single large holes during lithographic exposure and developing processes.
2Ease of manufacture
If the color filter substrate and the thin film transistor substrate are separately manufactured and then attached together, then both substrates can be produced independently, but there are complexities during the manufacturing process and including difficulties in aligning the two substrates
Solution Approach 1:
The color filter and thin film transistor are integrated on the same substrate, eliminating the need for separate manufacturing and attachment of two substrates. This merging approach simplifies the overall manufacturing process while maintaining the functional independence of both components.
3Device complexity
If the color filter is disposed on the thin film transistor substrate to simplify the manufacturing process, then alignment is improved, but the hole size control remains difficult due to over-exposure or non-exposure
Solution Approach 1:
The hole in the color filter is segmented into multiple sub-holes by adding a partition wall, which enables precise size control of each sub-hole even when the color filter is integrated on the thin film transistor substrate. This segmentation overcomes the size control difficulties that persist despite process simplification.
Data Source
AI summary
An apparatus and method for making a liquid crystal display (LCD) in which a thin film substrate includes a separately formed partition wall to more easily control the sizes of through-holes formed in a color filter of the LCD.