Electronic Substrate Detection Trace Structure for Short Circuit Prevention
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Solution Overview
Problem
Existing electronic substrates with irregular or special shapes face challenges in detecting circuit disconnections or poor contacts during manufacturing, particularly due to the limitations of single-layer metal traces in frame regions, which can lead to short circuits and reduced yield and increased production costs.
Innovation Solution
The electronic substrate design includes a detection trace structure with a first and second conductive trace in different electrode layers, spaced apart by an insulating layer, forming an arcuate trace structure that surrounds the functional region, effectively reducing short circuits and improving detection accuracy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single-layer metal trace structure is used in the frame region, then the manufacturing process is simple, but short circuits and poor contacts occur frequently leading to reduced yield
Solution Approach 1:
The patent transitions from a single-layer metal trace structure to a multi-layer electrode structure with first and second conductive traces in different electrode layers (first electrode layer and second electrode layer). This dimensional change from 2D single-layer to 3D multi-layer structure allows the conductive traces to be spaced apart by an insulating layer, preventing short circuits while maintaining manufacturing feasibility through standard multi-layer fabrication processes.
Solution Approach 2:
The patent introduces an insulating layer as an intermediary between the first conductive trace and the second conductive trace. This insulating layer acts as a mediator that prevents direct contact and short circuits between the conductive traces while allowing the detection trace structure to function properly. The insulating layer is formed between the first electrode layer and the second electrode layer, providing electrical isolation.
2Reliability
If detection trace structure is added to detect circuit disconnections, then yield improves, but device complexity increases
Solution Approach 1:
The patent merges the detection function with the existing electrode layer structure. The first conductive trace and second conductive trace are integrated into the first electrode layer and second electrode layer respectively, which are already part of the substrate fabrication process. This merging of detection functionality with the existing multi-layer structure avoids adding separate complex detection components while still enabling circuit disconnection detection.
Solution Approach 2:
The electrode layers and conductive traces serve multiple functions: they provide electrical connections for display or touch functions while simultaneously acting as detection traces for circuit disconnection detection. The first conductive trace and second conductive trace in different layers can detect signal transmission status, making the structure universal for both functional operation and quality detection.
3Reliability
If multi-layer electrode structure with insulating layer is used, then short circuits are reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent segments the conductive traces into separate layers (first conductive trace in first electrode layer, second conductive trace in second electrode layer) with an insulating layer between them. This segmentation physically separates the traces that would otherwise be in direct contact, reducing the impact of positioning variations. Each trace can be positioned and formed independently in its respective layer, making the overall structure more tolerant to manufacturing precision variations.
Data Source
AI summary
An electronic substrate and an electronic device are provided. The electronic substrate includes a first functional region, a second functional region, and a peripheral region; the first functional region includes an opening, the second functional region is in the opening, and the peripheral region includes an opening peripheral region between the first functional region and the second functional region; the electronic substrate includes a base substrate and a detection trace structure on the base substrate; the detection trace structure includes a first conductive trace and a second conductive trace which are in the opening peripheral region, and the first conductive trace and the second conductive trace respectively extend from a first position reversely along an edge of the second functional region and respectively partially surround the second functional region, the first conductive trace and the second conductive trace are spaced apart from each other in the first position.