OLED Transfer Device Carrier Pad Triboelectric Static Neutralization

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In the manufacturing of OLED display devices, the transfer of substrates in a vacuum environment faces challenges with static electricity generation due to friction, leading to misalignment and potential damage, which affects production efficiency and yield.

Innovation Solution

A transfer device with first and second carrier pads, where the material of the first carrier pad has a stronger capability to capture electrons and the second carrier pad has a stronger capability to lose electrons, is used to neutralize static electricity by alternating the electron capture and loss capabilities along the transfer path.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If friction force between substrate and transfer device is increased to prevent sliding, then alignment precision is improved, but static electricity accumulation increases causing potential damage

Engineering Contradiction:

Improvealignment precisionVSAvoidstatic electricity accumulation

Core Design Contradiction:

Manufacturing precisionVSObject-generated harmful factors

Solution Approach 1:

The patent changes the material parameters of the carrier pad from conventional materials to anti-static materials with specific electrical properties. The anti-static material has controlled electrical conductivity that allows static electricity to dissipate while maintaining sufficient friction for alignment, thus resolving the contradiction between alignment precision and static electricity accumulation.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses composite material structure combining friction-enhancing surface properties with anti-static bulk properties. The carrier pad employs composite materials that provide both high friction coefficient for preventing substrate sliding and controlled electrical conductivity for static dissipation, simultaneously achieving alignment precision and reducing static electricity harm.

Inventive Principle:

Principle #40Composite materials

2Reliability

If friction force is increased to maintain substrate stability, then transfer reliability is improved, but static electricity generation increases causing harmful effects

Engineering Contradiction:

Improvetransfer stabilityVSAvoidstatic electricity generation

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent modifies the electrical parameters of the transfer device materials by introducing anti-static materials with specific conductivity values. This parameter change allows the system to maintain high friction for stability while enabling controlled static electricity dissipation, thus improving transfer reliability without excessive static generation.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent converts the harmful static electricity generation from friction into a beneficial controlled dissipation process. By using anti-static materials, the friction-generated static electricity is immediately dissipated through the conductive carrier pad, transforming the potential harmful accumulation into a controlled and harmless flow, thereby maintaining transfer stability without harmful effects.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Device complexity

If conventional materials are used for carrier pad, then device complexity is reduced, but static electricity control capability is insufficient

Engineering Contradiction:

Improvematerial selection simplicityVSAvoidstatic electricity control

Core Design Contradiction:

Device complexityVSObject-generated harmful factors

Solution Approach 1:

The patent changes the material selection from conventional non-conductive materials to anti-static materials with specific electrical conductivity parameters. This single parameter change in material selection provides built-in static electricity control capability without adding complex external control systems, thus maintaining device simplicity while improving static control.

Inventive Principle:

Principle #35Parameter changes

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

This approach reduces static electricity accumulation, ensures precise alignment, and enhances production efficiency by maintaining sufficient frictional force, thereby improving the yield of OLED display devices.

Implementation Method 1

material of the first carrier pad has stronger capability of capturing electrons than that of the second carrier pad

Methodology Applied

Scientific EffectElectron transfer: Triboelectric Effect

Implementation Method 2

material of the second carrier pad has stronger capability of losing electrons than that of the first carrier pad

Methodology Applied

Scientific EffectElectron transfer: Triboelectric Effect

Implementation Method 3

friction tends to generate static electricity and also accumulate large amount of static electricity in the vacuum chamber

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS11535462B2Transfer device, transfer method and vacuum evaporation device

Publication Date: 2022.12.27 ORDOS YUANSHENG OPTOELECTRONICS

AI summary

A transfer device including at least one first transfer component and at least one second transfer component are provided. The first transfer component includes a first carrier pad contacting the transferred object, and the second transfer component includes a second carrier pad contacting the transferred object, and material of the first carder pad has stronger capability to capture electrons than that of the second carrier pad and material of the second carrier pad has stronger capability to lose electrons than that of the first carder pad.