Pixel Electrode Protection Layout for Higher Display Yield

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Solution Overview

Problem

In the integration of multiple components on a substrate for display devices, existing methods often damage existing components, leading to suboptimal manufacturing yield and product quality.

Innovation Solution

A pixel structure comprising a substrate with an active device, a planarization layer, a pixel electrode, and a patterned protection layer, where the patterned protection layer laterally surrounds the pixel electrode and both are in contact with the planarization layer, preventing damage during the integration of additional elements or film layers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple components are integrated on the same substrate to provide more functions and circuit transmission requirements, then the functionality and versatility of the display device are improved, but the risk of damaging existing components during the manufacturing process increases, leading to reduced manufacturing yield

Engineering Contradiction:

ImprovefunctionalityVSAvoidmanufacturing yield

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies preliminary action by forming a protection layer on the planarization layer before integrating additional components. This protection layer is prepared in advance to prevent damage to existing components during subsequent manufacturing processes, thereby resolving the contradiction between integrating multiple functions and maintaining manufacturing yield.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The protection layer acts as an intermediary between the planarization layer and subsequent manufacturing processes. It serves as a protective barrier that mediates the interaction between new components being integrated and existing components, preventing damage while allowing functionality expansion.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If multiple components are integrated on the same substrate, then the functionality of the display device is improved, but the complexity of the manufacturing process increases, making it more difficult to ensure component quality

Engineering Contradiction:

ImprovefunctionalityVSAvoidmanufacturing process complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the manufacturing process into distinct stages with the protection layer formation as a separate step. This segments the complex integration process into manageable parts, where the protection layer is formed independently before subsequent component integration, reducing overall process complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

By performing the protection layer formation as a preliminary action before component integration, the patent simplifies the overall manufacturing process. This preliminary step prepares the substrate in advance, making subsequent integration processes more straightforward and easier to control.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If additional elements or film layers are integrated on the substrate, then the functionality of the display device is enhanced, but the risk of damaging existing components such as the planarization layer increases

Engineering Contradiction:

ImprovefunctionalityVSAvoiddamage risk to existing components

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies beforehand cushioning by forming a protection layer that acts as a cushion or buffer between the planarization layer and subsequent manufacturing processes. This protection layer absorbs or mitigates potential damage from subsequent processing steps, allowing additional elements to be integrated without harming existing components.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The protection layer serves as an intermediary that protects the planarization layer from harmful factors introduced during subsequent integration processes. It mediates between new components being added and existing components, preventing direct harmful interactions.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20240321908A1Pixel structure and manufacturing method of pixel structure

Publication Date: 2024.09.26 E INK HLDG INC

AI summary

A pixel structure including a substrate, an active device, a planarization layer, a pixel electrode, and a patterned protection layer is provided. The active device is disposed on the substrate. The planarization layer is disposed on the substrate and covers the active device. The pixel electrode is disposed on the planarization layer and electrically connected to the active device. The patterned protection layer is disposed on the planarization layer and laterally surrounds the pixel electrode, and both the patterned protection layer and the pixel electrode are in contact with the planarization layer.