Fan-out blocks with adjusted intercept lengths for uniform resistance
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Solution Overview
Problem
Conventional LCD panels face image quality degradation due to non-uniform resistance between adjacent fan-out blocks, which can result in significant differences in control signal timing and quality.
Innovation Solution
The implementation of fan-out blocks with specific routing portions, including a first routing portion, an intermediate portion, and a second routing portion, where the intercept lengths of the second routing portions of adjacent outmost interconnecting leads are adjusted to ensure uniform resistance, typically within 10Ω, by measuring and adjusting the intercept lengths to maintain resistance uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional fan-out block routing is used, then device complexity is reduced and manufacturing is easier, but resistance uniformity between adjacent interconnecting leads deteriorates
Solution Approach 1:
The patent applies local quality by making different parts of the routing structure have different properties. Specifically, the second routing portions of adjacent outmost interconnecting leads are designed with different intercept lengths to achieve uniform resistance. This local variation in geometry compensates for the different lengths of interconnecting leads, ensuring that resistance is uniform across all leads despite their varying path lengths.
2Reliability
If uniform resistance is achieved within single fan-out block, then signal quality within block is improved, but resistance differences between adjacent fan-out blocks remain significant
Solution Approach 1:
The patent applies parameter changes by varying the intercept length parameter of the second routing portions between adjacent fan-out blocks. By adjusting this geometric parameter, the resistance of outmost interconnecting leads from different fan-out blocks is equalized. This allows the design to achieve resistance uniformity across multiple blocks while maintaining the benefits of uniform resistance within each block.
3Manufacturing precision
If intercept lengths of second routing portions are made different, then resistance uniformity is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies preliminary action by pre-calculating and pre-designing the different intercept lengths for the second routing portions during the design phase. The design methodology includes calculating target intercept lengths that will achieve the desired resistance uniformity, and then implementing these predetermined values in the manufacturing process. This approach transforms a potentially complex measurement and adjustment problem into a straightforward fabrication process with clear design specifications.
Data Source
AI summary
The present invention provides an electronic device and manufacturing method thereof. The interconnecting leads of adjacent fan-out blocks have different heights along boundary area, thereby making the resistance of the adjacent interconnecting leads uniform and ensuring the quality of the electronic device.