Coated Glass Sheet Dense Layer Water Ingress Prevention

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Solution Overview

Problem

Conventional coated glass sheets with porous low-reflection coating films face issues of insufficient durability and water penetration, leading to surface deterioration.

Innovation Solution

A coated glass sheet design featuring a dense layer positioned between the glass sheet and a porous layer, enhancing durability and preventing water ingress.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a porous low-reflection coating film is formed on the glass sheet, then light transmission is improved, but durability deteriorates and water penetration occurs

Engineering Contradiction:

Improvelight transmissionVSAvoiddurability

Core Design Contradiction:

Illumination intensityVSReliability

Solution Approach 1:

The coating film is divided into two distinct layers: a porous low-reflection layer for optimizing light transmission and a dense barrier layer for preventing water penetration and enhancing durability. This segmentation allows each layer to perform its specific function without compromising the other, resolving the contradiction between light transmission and durability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The coating film uses a composite structure combining porous materials (for light transmission) with dense barrier materials (for water resistance). The porous layer contains fine particles creating light-scattering pathways, while the dense layer provides a continuous protective matrix, creating a composite system that achieves both optical performance and environmental durability

Inventive Principle:

Principle #40Composite materials

2Illumination intensity

If a porous low-reflection coating film is formed on the glass sheet, then light transmission is improved, but water resistance deteriorates

Engineering Contradiction:

Improvelight transmissionVSAvoidwater penetration

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The dense barrier layer acts as an intermediary protective layer between the porous low-reflection layer and the external environment. It mediates by blocking water penetration while allowing the porous layer above it to maintain its light transmission function, thus protecting the functional layer from harmful water exposure

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 solution provides a coated glass sheet with increased durability and improved light transmission properties, while maintaining the low-reflection effect and preventing surface deterioration.

Implementation Method 1

the presence of the dense layer can reduce water to penetrate into the coating film from outside of the coating film

Methodology Applied

Scientific EffectPhysical barrier:

Implementation Method 2

a low-reflection coating film is formed on the other principal surface of the glass sheet opposite to the one principal surface... allows more sunlight to reach the photoelectric conversion layer or solar cell element, thus increasing the amount of electricity to be generated

Methodology Applied

Scientific EffectLight scattering: Scattering

Data Source

PatentUS10908320B2Coated glass sheet and method for producing same

Publication Date: 2021.02.02 NIPPON SHEET GLASS CO LTD

AI summary

The coated glass sheet of the present invention includes: a glass sheet; and a coating film provided on at least one principal surface of the glass sheet. The coating film includes a dense layer and a porous layer. The dense layer is positioned between the porous layer and the glass sheet.