Multi-Layer Substrate Wiring with Shielding for Narrow Bezel
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current capacitive touch screens face challenges in achieving narrow bezels due to increased RC Load from reduced line width and spacing, and signal interference limitations, which hinder the implementation of thinner and more sensitive touch screens with reduced bezel widths.
Innovation Solution
A substrate with a wiring region featuring conductive lines arranged in parallel layers, where adjacent layers are separated by a signal shielding layer and an insulation layer, with overlapping projections to minimize the distribution region and bezel width, while preventing signal crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If line width and line spacing are reduced to achieve narrow bezel, then bezel width is reduced, but RC Load increases significantly
Solution Approach 1:
The patent transitions from a single-layer planar wiring layout to a multi-layer three-dimensional wiring structure. Conductive lines are arranged in multiple layers with overlapping projections, allowing the wiring to utilize the vertical dimension (thickness direction) to reduce the horizontal footprint and bezel width while maintaining adequate line dimensions and spacing to control RC Load.
Solution Approach 2:
The patent implements nested wiring where conductive lines in different layers are positioned to overlap when projected onto the base, creating a nested configuration. This nesting allows the wiring to occupy the same horizontal footprint area across multiple layers, effectively reducing the overall bezel width while maintaining signal integrity and electrical performance.
2Length of stationary object
If wiring configuration is changed to achieve narrow bezel, then bezel width is reduced, but signal interference increases
Solution Approach 1:
The patent segments the wiring into multiple distinct layers separated by insulating layers. Each layer of conductive lines is electrically isolated from adjacent layers through the insulating material, which prevents signal crosstalk and interference while allowing the layers to be positioned in a compact, overlapping configuration that reduces bezel width.
Solution Approach 2:
The patent introduces insulating layers as intermediary materials between adjacent layers of conductive lines. These insulating layers act as mediators that electrically isolate the conductive lines in different layers, preventing direct electromagnetic coupling and signal interference while enabling the multi-layer overlapping structure that achieves narrow bezel.
3Area of stationary object
If multi-layer conductive lines are arranged with overlapping projections, then distribution region is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent divides the wiring structure into multiple discrete layers, each formed through separate manufacturing steps. The insulating layers are formed between conductive line layers, creating distinct segments that can be manufactured and controlled independently, facilitating the overlapping configuration while managing manufacturing complexity through modular layer-by-layer construction.
Data Source
AI summary
The present disclosure relates to the field of display technology, and discloses a substrate and a method for fabricating the same, and a display device. The substrate includes a plurality of players of conductive lines arranged on a base, and adjacent two layers of conductive lines are arranged with a signal shielding layer there between to eliminate signal crosstalk between the adjacent two layers of conductive lines. And in the direction of arrangement of the same layer of conductive lines, projections of regions of distribution of adjacent two layers of conductive lines on the base are at least partially overlapped with each other.