Single-Layer Silicon Titanium Oxide Coating for Glass

Solution Overview

Problem

The existing two-layer color suppression interlayers for glass substrates are costly and complex, and the first coating materials fail to effectively block sodium diffusion from the glass substrate.

Innovation Solution

A single-layer color suppression interlayer is formed using a chemical vapor deposition process with a gaseous mixture of a silicon-containing compound, an oxygen-containing compound, a radical scavenger, and a titanium-containing compound, resulting in a coating comprising silicon oxide and titanium oxide with a refractive index of 1.48 or more, which is deposited directly on the glass substrate to act as a barrier against sodium diffusion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a two-layer color suppression interlayer is used, then the iridescence interference properties are improved, but the manufacturing complexity and cost increase

Engineering Contradiction:

Improveiridescence interference propertiesVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the functions of two separate coating layers into a single coating layer. The single layer contains both color suppression components (first and second color suppressing agents) that work together to provide iridescence interference while simplifying the manufacturing process and reducing costs.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The coating layer uses a composite material system with multiple functional components including first and second color suppressing agents, and optionally first and second bridge agents. This composite structure enables the single layer to achieve the optical properties previously requiring two separate layers.

Inventive Principle:

Principle #40Composite materials

2Reliability

If a two-layer color suppression interlayer is used, then the iridescence interference properties are improved, but the manufacturing cost increases

Engineering Contradiction:

Improveiridescence interference propertiesVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent combines the functions of two separate coating layers into a single coating layer. The single layer contains both color suppression components (first and second color suppressing agents) that work together to provide iridescence interference while simplifying the manufacturing process and reducing costs.

Inventive Principle:

Principle #5Merging (Combining)

3Ease of manufacture

If conventional first coating materials are used, then the coating process is simple, but sodium diffusion from the glass substrate is not blocked

Engineering Contradiction:

Improvecoating process simplicityVSAvoidsodium diffusion

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a bridge agent as an intermediary substance between the color suppressing agents and the glass substrate. This bridge agent specifically addresses sodium diffusion by forming a barrier layer that prevents harmful sodium ions from migrating while maintaining the overall simplicity of the coating process.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The coating layer uses a composite material system with multiple functional components including first and second color suppressing agents, and optionally first and second bridge agents. This composite structure enables the single layer to achieve optical properties previously requiring two separate layers.

Inventive Principle:

Principle #40Composite materials

4Device complexity

If a single layer color suppression interlayer is formed, then the manufacturing complexity and cost are reduced, but the ability to block sodium diffusion is compromised

Engineering Contradiction:

Improvemanufacturing complexityVSAvoidsodium diffusion

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a bridge agent as an intermediary substance between the color suppressing agents and the glass substrate. This bridge agent specifically addresses sodium diffusion by forming a barrier layer that prevents harmful sodium ions from migrating while maintaining the overall simplicity of the coating process.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

The single-layer color suppression interlayer reduces complexity and cost while effectively blocking sodium diffusion and improving iridescence interference properties with a high refractive index, making it suitable for use in glass articles.

Implementation Method 1

directing the gaseous mixture toward and along the glass substrate, and reacting the mixture over the glass substrate to form the coating thereover

Methodology Applied

Scientific EffectChemical vapor deposition: Chemical Vapour Deposition

Implementation Method 2

utilize a color suppression interlayer on a glass substrate to reflect and refract light to interfere with the observance of iridescence

Methodology Applied

Scientific EffectRefraction: Refraction

Implementation Method 3

utilize a color suppression interlayer on a glass substrate to reflect and refract light to interfere with the observance of iridescence

Methodology Applied

Scientific EffectReflection: Reflection

Implementation Method 4

the coating materials known to be utilized in the first coating of a two-layer color suppression interlayer fail to block sodium diffusion from the glass substrate

Methodology Applied

Scientific EffectDiffusion: Diffusion

Data Source

PatentUS11535552B2Chemical vapor deposition process for depositing a coating and the coating formed thereby

Publication Date: 2022.12.27 PILKINGTON GRP LTD

AI summary

A chemical vapor deposition process for depositing a coating comprising silicon oxide and titanium oxide is provided. A coating formed by the chemical vapor deposition process is also provided.