BOA Liquid Crystal Panel Black Matrix Channel Design
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Solution Overview
Problem
Conventional BOA liquid crystal displays face issues with non-uniform film thickness due to the direct formation of the black matrix on the array substrate, leading to potential line breaking and defects in the metal process, and require additional planarization layers which complicate manufacturing.
Innovation Solution
A BOA liquid crystal panel is designed with a black matrix arranged within a pre-formed channel in the substrate, ensuring uniform film thickness, and a manufacturing method that forms this channel before the TFT process to maintain substrate surface flatness and prevent defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the black matrix is directly formed on the array substrate, then the black matrix can be easily formed, but the film thickness becomes non-uniform and the draft angle becomes steeper
Solution Approach 1:
A channel structure is pre-formed in the array substrate before forming the black matrix. This preliminary structural preparation allows the black matrix to be formed within the channel, ensuring that the top surface of the black matrix is substantially coplanar with the top surface of the array substrate, thereby achieving uniform film thickness without requiring additional planarization layers.
2Ease of manufacture
If the black matrix is directly formed on the array substrate, then the black matrix can be formed, but line breaking may occur during the metal process
Solution Approach 1:
The channel structure is pre-formed in the array substrate to provide a controlled environment for black matrix formation. This preliminary structural preparation ensures uniform film thickness and reduces the draft angle, thereby eliminating the risk of line breaking during subsequent metal processes.
3Manufacturing precision
If an additional planarization layer is included to address film thickness non-uniformity, then film thickness uniformity can be improved, but the manufacturing process becomes more complex
Solution Approach 1:
Instead of adding a planarization layer after black matrix formation, the solution pre-forms a channel structure in the array substrate before black matrix deposition. This preliminary structural preparation allows the black matrix to self-align to the substrate surface level, achieving uniform film thickness without additional planarization steps and simplifying the overall manufacturing process.
Data Source
AI summary
The present invention provides a BOA liquid crystal panel and a manufacturing method thereof. The BOA liquid crystal panel includes a first substrate, a second substrate opposite to the first substrate, a black matrix arranged in the first substrate, a thin-film transistor arranged on the black matrix, a color resist layer arranged on the second substrate, a common electrode layer arranged on the second substrate and the color resist layer, a photoresist spacer arranged on the common electrode layer and located between the first substrate and the second substrate, and a liquid crystal layer arranged between the first substrate and the second substrate. The present invention arranges the black matrix of the liquid crystal panel in a channel that is pre-formed in a substrate to make the film thickness of the liquid crystal panel uniform and improve the display performance of the liquid crystal panel.