Touch Detection Line Layering for FMLOC Boundary Short Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing touch control structures in flexible multi-layer on cell (FMLOC) technology face issues of short circuits and material residue due to the proximity and overlapping of metal layers at the boundary of the organic layer, leading to defects in crack detection and ground wire functionality.
Innovation Solution
The design incorporates a touch control structure with overlapping parts of detection lines in different metal layers, separated by an insulation layer, and adjusts the positioning of PCD wires and GND wires to prevent short circuits and material residue, ensuring they are in distinct layers at the boundary of the organic layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the first detection line and second detection line are arranged in the same metal layer, then the structure is simpler, but short circuit occurs due to material remaining at the boundary of the organic layer
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement to a three-dimensional layered structure by placing the first detection line in the first metal layer and the second detection line in the second metal layer. This vertical separation in the layer dimension eliminates the short circuit risk while maintaining structural simplicity through the use of standard multi-layer fabrication processes.
Solution Approach 2:
The insulation layer positioned between the first metal layer and the second metal layer serves as an intermediary barrier. This intermediate layer physically separates the two detection lines and prevents direct electrical contact, thereby preventing short circuits while allowing the lines to be arranged in close proximity for compact design.
2Area of stationary object
If the detection lines are positioned close to each other, then the device size is reduced, but material residue causes short circuits at the organic layer boundary
Solution Approach 1:
Instead of increasing the horizontal distance between detection lines to prevent short circuits, the patent utilizes the vertical dimension by stacking the lines in different metal layers. This allows the lines to be positioned close together in the planar view while maintaining electrical isolation through the layered structure and insulation layer.
3Reliability
If the first detection line and second detection line are in different metal layers, then short circuit is prevented, but the structure becomes more complex
Solution Approach 1:
The patent segments the detection function into two separate metal layers, with the first detection line in the first metal layer and the second detection line in the second metal layer. This segmentation prevents short circuits by isolating the lines in different layers while using standard multi-layer fabrication techniques that manage the added structural complexity.
Solution Approach 2:
The insulation layer acts as an intermediary element that manages the complexity of having detection lines in different layers. It provides a clear separation mechanism between the first and second metal layers, simplifying the design and fabrication process while ensuring reliable electrical isolation.
Data Source
AI summary
A touch control structure, a touch display panel and an electronic device are provided. The touch control structure includes a first metal layer, an insulation layer and a second metal layer that are sequentially stacked on the base substrate, the touch control structure is divided into a touch region and a peripheral region surrounding the touch region, and the peripheral region includes a first detection line and a second detection line that are sequentially arranged and spaced apart from each other along the direction from the touch region to the peripheral region; the first detection line is in the second metal layer, and the overlapping part of the second detection line is in the first metal layer; the first end of the second detection line includes a first detection part in the second metal layer and a second detection part in the first metal layer.