Flexible Window Inorganic Coating for Optical Clarity and Impact Resistance

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Solution Overview

Problem

Polymer films used as window materials for electronic devices compromise optical properties and impact resistance, which are crucial for flexible displays.

Innovation Solution

Incorporating an inorganic layer composed of silicon oxide and aluminum oxide, with a content of about 1 to 10 wt% and a thickness of 40 to 90 nm, enhances the optical properties and impact resistance of the window.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a polymer film is used as a window material to achieve flexible properties, then flexibility is improved, but optical properties and impact resistance are deteriorated

Engineering Contradiction:

ImproveflexibilityVSAvoidoptical properties and impact resistance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies composite materials by combining a polymer film base layer with an inorganic layer containing silicon oxide and aluminum oxide. This composite structure allows the window to maintain the flexibility of the polymer film while the inorganic layer provides enhanced optical properties and impact resistance, thus resolving the contradiction between flexibility and reliability.

Inventive Principle:

Principle #40Composite materials

2Illumination intensity

If the inorganic layer contains aluminum oxide within 1-10 wt% range, then optical properties are improved, but manufacturing precision requirements increase

Engineering Contradiction:

Improvetransmittance and optical qualityVSAvoidcomposition control precision

Core Design Contradiction:

Illumination intensityVSManufacturing precision

Solution Approach 1:

The patent applies parameter changes by specifying a precise aluminum oxide content range of 1-10 wt% in the inorganic layer. This controlled composition parameter optimization improves optical properties (transmittance, haze value, yellow index) while establishing clear manufacturing guidelines to manage precision requirements.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12468069B2Window and electronic device including the same

Publication Date: 2025.11.11 SAMSUNG DISPLAY CO LTD

AI summary

A window includes a base layer and an inorganic layer which is on the base layer. The inorganic layer includes silicon oxide and aluminum oxide which is in a content of about 1 wt % or more and less than about 10 wt % with respect to about 100 wt % of the silicon oxide.