Fan-out Wire Structure Multi-layer Metal Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional fan-out wire structures in flat panel displays struggle to meet the requirements of higher resolution, lighter weight, and better display quality due to limitations in wire distribution density and impedance matching, especially as display sizes decrease and resolutions increase.
Innovation Solution
The use of multiple single-layer metal layers, where each wire is formed from either a first or second metal layer, allowing for a fan-out wire structure with increased wire density and improved signal transmission by alternating the metal layers and connecting them via through holes and conductive layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single-layer metal layer is used to form all wires in the fan-out wire structure, then the manufacturing process is simple, but the wire distribution density is insufficient and cannot meet high resolution requirements
Solution Approach 1:
The patent divides the wire structure into multiple single-layer metal layers (first single-layer metal layer and second single-layer metal layer), with each layer forming a subset of wires. This segmentation allows higher wire distribution density by utilizing multiple layers instead of one, resolving the contradiction between manufacturing precision and device complexity.
Solution Approach 2:
The patent transitions from a two-dimensional single-layer wire layout to a three-dimensional multi-layer wire structure. By stacking wires across multiple metal layers, the wire distribution density increases significantly, enabling high resolution displays while maintaining manageable manufacturing complexity through standardized layer processing.
2Reliability
If extra curves are added to wires to provide equal impedance transmission paths, then signal quality is maintained, but the space occupied increases
Solution Approach 1:
The patent uses multiple metal layers to provide alternative routing paths for wires. Instead of adding curves in the same plane that consume space, wires can transition between layers to achieve equal impedance paths more efficiently, maintaining signal quality while reducing the overall area occupied by the fan-out wire structure.
3Weight of stationary object
If the display frame size is reduced to achieve lighter weight and thinner size, then portability is improved, but the wire gaps approach the design rule limits
Solution Approach 1:
The patent segments wires across multiple metal layers, allowing closer spacing between adjacent wires by utilizing vertical separation between layers. This enables reduced display frame size and lighter weight while maintaining adequate wire gaps within design rule limits through the third-dimensional layering approach.
Data Source
AI summary
A fan-out wire structure is used to connect a driver and a display region of a display panel and has a plurality of first single-layer wires and at least one second single-layer wire. The first ends of the first single-layer wires are connected to the driver, and the second ends of the first single-layer wires are connected to the display area. The first end of the second single-layer wire is connected to the driver, and the second end of the second single-layer wire is connected to the display area. A metal layer of the first single-layer wires is different from a metal layer of the second single-layer wire.