Double-Layer Mask Component Clamping Mechanism for OLED Evaporation

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Solution Overview

Problem

In OLED display manufacturing, the double-layer mask components composed of an open mask and a fine metal mask cannot be closely fitted due to wrinkles caused by tensioning and welding, leading to a reduced evaporation quality.

Innovation Solution

A double-layer mask component design featuring a first mask and a second mask with clamping portions, such as bumps and grooves, that allow for precise fitting without welds, ensuring the masks can be closely aligned and eliminating wrinkles.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the open mask and fine metal mask are tensioned and welded together, then the masks can be assembled, but wrinkles are caused and the masks cannot be closely fitted

Engineering Contradiction:

Improvemask assemblyVSAvoidmask fitting precision

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The mask assembly is divided into separate components (open mask and fine metal mask) that are positioned independently on the substrate, avoiding the need for tensioning and welding between mask layers while eliminating wrinkles

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A positioning structure with positioning holes and positioning protrusions acts as an intermediary mechanism to precisely align and fix the masks to the substrate, replacing the traditional welding method and ensuring close fitting without wrinkles

Inventive Principle:

Principle #24Intermediary (Mediator)

2Stability of the object's composition

If the masks are welded together, then the structure is stabilized, but the evaporation quality is reduced due to wrinkles

Engineering Contradiction:

Improvemask structure stabilityVSAvoidevaporation quality

Core Design Contradiction:

Stability of the object's compositionVSManufacturing precision

Solution Approach 1:

The positioning structure with positioning holes and protrusions serves as an intermediary that provides structural stability by precisely fixing the masks to the substrate, eliminating the need for welding between mask layers and preventing wrinkle formation

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The welding process between mask layers is extracted and removed from the assembly process, replacing it with a positioning structure that achieves both stability and wrinkle-free assembly

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS10651384B2Double-layer mask component and evaporation device

Publication Date: 2020.05.12 BOE TECHNOLOGY GROUP CO LTD

AI summary

A double-layer mask component includes a first mask, a first mask frame, a second mask and a second mask frame. The first mask is fixed on the first mask frame, and a first clamping portion is provided within a region which is located on a surface of the first mask frame with the first mask fixed thereon and not covered by the first mask. The second mask is fixed on the second mask frame, and a second clamping portion is provided within a region which is located on a surface of the second mask frame with the second mask fixed thereon and not covered by the second mask. The surface of the first mask frame and the surface of the second mask frame are arranged in opposite, and the first clamping portion and the second clamping portion are clamped, so that the first mask fits with the second mask.