Array Substrate Static Charge Releasing Pattern

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Solution Overview

Problem

Conventional array substrate production methods lead to static charge accumulation in metal patterns, causing short circuits between electrically conductive patterns, which degrades display performance and user experience.

Innovation Solution

Incorporating a static charge releasing pattern made of the same material as the electrically conductive pattern, insulated from it but electrically connected to the metal pattern, to prevent static charge buildup, with the pattern formed in the same layer as the conductive pattern and connected through via holes in an insulating layer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If plasma glow discharging method is used to deposit electrically conductive pattern, then metal pattern can be formed, but static charge accumulates in the metal pattern causing breakdown of adjacent insulated layers and short circuits

Engineering Contradiction:

Improvemetal pattern formationVSAvoidshort circuit prevention

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

A static charge releasing pattern is introduced as an intermediary element between the metal pattern and the insulating layer. This releasing pattern provides a controlled discharge path for static charges that accumulate during plasma deposition, preventing charge buildup that would otherwise cause insulating layer breakdown and short circuits.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The harmful static charge is extracted from the metal pattern through the static charge releasing pattern. The releasing pattern is specifically designed to capture and discharge accumulated static charges, removing the harmful electrical charge before it can cause insulation breakdown.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If static charge releasing pattern is added to eliminate static charges, then short circuit prevention is improved, but device structure becomes more complex

Engineering Contradiction:

Improveshort circuit preventionVSAvoidpattern structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The static charge releasing pattern is merged with the existing electrically conductive pattern layer, both being formed in the same layer using the same material. This integration approach adds the charge releasing functionality without creating entirely separate structural elements, thereby minimizing increases in device complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The static charge releasing pattern serves multiple functions: it provides a discharge path for static charges, maintains electrical insulation through the insulating layer, and can function as an external connection terminal. This multi-functionality reduces the need for additional dedicated structures.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of manufacture

If static charge releasing pattern is formed in the same layer as electrically conductive pattern, then production process is simplified, but electrical insulation between patterns becomes more difficult to maintain

Engineering Contradiction:

Improveproduction processVSAvoidelectrical insulation

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

An insulating layer is positioned between the static charge releasing pattern and the metal pattern to maintain electrical insulation. This intermediary insulating layer allows both patterns to coexist in the same layer while preventing direct electrical contact, thus maintaining insulation precision despite the simplified manufacturing process.

Inventive Principle:

Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Effectively eliminates static charge-induced short circuits without increasing production costs, allowing for the use of the static charge releasing pattern as an external connection terminal and optimizing space in narrow-frame display applications.

Implementation Method 1

an electrically conductive pattern is typically deposited by plasma glow discharging method

Methodology Applied

Scientific EffectPlasma glow discharge: Plasma

Implementation Method 2

static charge is accumulated in the metal pattern to cause breakdown of adjacent insulated layers

Methodology Applied

Scientific EffectElectrostatic discharge: Electrostatic Discharge

Data Source

PatentUS11233016B2Array substrate with static charge releasing pattern and method for producing the same

Publication Date: 2022.01.25 CHENGDU BOE OPTOELECTRONICS TECH CO LTD

AI summary

An array substrate and a method for producing the same are disclosed. The array substrate includes a metal pattern and an electrically conductive pattern sequentially formed on a base substrate, the electrically conductive pattern being insulated from the metal pattern. The array substrate further includes a static charge releasing pattern formed in a same layer and made of a same material as the electrically conductive pattern, and which is insulated from the electrically conductive pattern. The metal pattern is a signal line running through a display area of the array substrate, and includes an input end, an output end, and a body portion between the input end and the output end. The output end of the signal line includes an island-like structure, and a width of the island-like structure is greater than that of the body portion. The static charge releasing pattern is electrically connected with the island-like structure.