Layered Display Electrodes With Exposed Base Contacts
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face issues with defects at contact portions of electrodes on different layers, leading to electrical connection failures and increased electrical resistance.
Innovation Solution
The display device incorporates electrodes made of different materials, with the electrode upper layer partially exposing the electrode base layer, and includes insulating layers to prevent damage and ensure electrical connectivity, using aluminum for the upper layer and a conductive material without aluminum for the base layer, with specific contact portions and connection electrodes to maintain electrical contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrode upper layer is made of aluminum, then the electrical conductivity is improved, but the electrode becomes vulnerable to damage in subsequent processes
Solution Approach 1:
The electrode is divided into two distinct layers: an electrode base layer providing mechanical strength and durability, and an electrode upper layer providing high electrical conductivity. This segmentation allows each layer to fulfill its specific function without compromising the other, resolving the contradiction between conductivity and durability.
Solution Approach 2:
The electrode structure uses a composite configuration with different materials for each layer. The base layer uses a durable conductive material while the upper layer uses aluminum for optimal electrical conductivity. This composite approach combines the advantages of both materials to achieve both high conductivity and durability.
2Strength
If the electrode upper layer completely covers the electrode base layer, then the electrode is protected, but contact portions with connection electrodes cannot be established
Solution Approach 1:
The electrode upper layer is designed with varying coverage: it covers most of the electrode base layer to provide protection, but intentionally leaves exposed certain contact portions where connection electrodes need to make contact. This local differentiation in coverage resolves the contradiction between overall protection and localized electrical connection requirements.
3Reliability
If contact portions expose the electrode base layer, then electrical connection is enabled, but the exposed base layer may be damaged
Solution Approach 1:
The electrode base layer is designed with extended contact portions that protrude beyond the electrode upper layer before any damage can occur. This preliminary structural arrangement ensures that connection electrodes can make contact with the durable base layer material directly, enabling reliable electrical connection while the base layer's inherent durability protects against damage at the contact interface.
Data Source
AI summary
A first electrode upper layer of an electrode upper layer of a display device and a second electrode upper layer are disposed to partially expose a top surface of the first electrode base layer and a top surface of the second electrode base layer, respectively. A first insulating layer of the display device includes contact portions partially exposing a top surface of the first electrode base layer, a top surface of the second electrode base layer, and a top surface of the pad electrode upper layer.