Electrostatic Film Peeling Rollers for OLED Substrates

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Solution Overview

Problem

Existing film peeling technologies for organic light emitting display apparatuses face challenges in efficiently peeling films from substrates without damaging the organic light emitting layer, often due to pressure applied by rollers which can deteriorate the transfer quality.

Innovation Solution

The film peeling apparatus employs first peeling rollers with electrostatic chucks to adsorb and roll the donor film, maintaining a sufficient adsorptive force without pressing the film onto the substrate, and optionally includes gas spraying or temperature control to ensure uniform peeling and prevent damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If conventional mechanical rollers are used to peel the film, then the peeling force is sufficient, but the organic light emitting layer is damaged due to pressure application

Engineering Contradiction:

Improvepeeling forceVSAvoidpressure damage to organic light emitting layer

Core Design Contradiction:

ForceVSObject-affected harmful factors

Solution Approach 1:

The patent replaces conventional mechanical pressure-based peeling rollers with electrostatic chuck-equipped rollers that generate electrostatic attraction forces. This substitution eliminates direct mechanical pressure contact between the rollers and the substrate, thereby preventing damage to the organic light emitting layer while maintaining sufficient peeling force through electrostatic attraction.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the fundamental parameter of force application from mechanical contact pressure to electrostatic field attraction. By using electrostatic chucks that generate electrostatic forces without physical pressure contact, the system achieves effective film peeling while avoiding the harmful pressure effects that damage the organic light emitting layer.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If rollers contact the substrate directly to peel the film, then peeling efficiency is high, but foreign substances are introduced and transfer quality deteriorates

Engineering Contradiction:

Improvepeeling efficiencyVSAvoidforeign substances and transfer quality degradation

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent replaces direct mechanical contact between rollers and substrate with electrostatic field-based attraction. This substitution eliminates the introduction of foreign substances from roller contact while maintaining peeling efficiency through the electrostatic chuck's attraction force that acts without physical contact.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The electrostatic field acts as an intermediary between the peeling rollers and the substrate, enabling force transmission without direct physical contact. This intermediary mechanism prevents foreign substance contamination while maintaining effective peeling action through the electrostatic attraction field.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Strength

If pressure is applied to secure adhesion during peeling, then the film adheres well to rollers, but the organic light emitting layer transfer quality is compromised

Engineering Contradiction:

Improveadhesion strengthVSAvoidtransfer quality of organic light emitting layer

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

The patent substitutes mechanical pressure-based adhesion with electrostatic field-based adhesion. The electrostatic chuck generates strong electrostatic attraction forces that secure the film to the rollers without applying mechanical pressure to the substrate, thereby maintaining both adhesion strength and transfer quality of the organic light emitting layer.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 method allows for easy and efficient film peeling without applying pressure to the substrate, thereby maintaining the transfer quality of the organic light emitting layer and preventing retransfer during the peeling process.

Implementation Method 1

each of the first peeling rollers includes a first electrostatic chuck to adsorb a first film attached to the substrate

Methodology Applied

Scientific EffectElectrostatic attraction: Electrostatics

Data Source

PatentUS9315006B2Film peeling apparatus

Publication Date: 2016.04.19 SAMSUNG DISPLAY CO LTD

AI summary

A film peeling apparatus that peels a film attached to a substrate includes a chamber, a transfer unit, and first peeling rollers. The transfer unit is disposed in the chamber to transfer the substrate. The first peeling rollers are disposed in the chamber, each of the first peeling rollers includes a first electrostatic chuck to adsorb a first film attached to the substrate. The first peeling rollers roll the adsorbed first film to peel the first film from the substrate.