Multilayer Resin Container for High-Purity Organotin Storage

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Solution Overview

Problem

Existing containers for storing and transporting organotin compounds face issues with corrosion, impurity contamination, and decomposition due to reactivity with metal surfaces, water, and light, which compromise the purity required for semiconductor applications.

Innovation Solution

A multi-layer container with a light-shielding, gas barrier, and innermost resin layer, filled with high-purity inert gas such as argon, to maintain the purity and stability of organotin compounds.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a fluororesin coating layer is formed on the inner surface of a metal container, then corrosion resistance is improved, but scratch resistance deteriorates and resin particles may contaminate the organotin compound

Engineering Contradiction:

Improvecorrosion resistanceVSAvoidscratch resistance

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent employs disposable resin containers instead of reusable metal containers with coating layers. The resin containers are designed for single-use, eliminating the problems of coating layer damage and metal elution that occur with repeated cleaning and use of metal containers. This resolves the contradiction by sacrificing the reusability aspect to maintain both corrosion resistance and prevent contamination.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Strength

If an uncoated metal container is used, then scratch resistance is improved, but metal elution occurs during cleaning with acidic aqueous solutions

Engineering Contradiction:

Improvescratch resistanceVSAvoidcorrosion resistance

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The patent uses disposable resin containers that eliminate the need for repeated cleaning operations. Since the containers are discarded after single use, they never undergo cleaning with acidic aqueous solutions that would cause metal elution from uncoated metal containers. This resolves the contradiction by avoiding the cleaning process entirely.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Reliability

If strict airtightness is required to prevent hydrolysis, then purity is maintained, but container complexity increases

Engineering Contradiction:

Improvepurity maintenanceVSAvoidcontainer complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent uses resin containers made from composite materials with specific properties: low permeability to gases and water vapor, chemical inertness, and inherent airtightness when properly sealed. The resin material itself provides the airtight barrier needed to prevent hydrolysis, eliminating the need for complex multi-component sealing systems or active monitoring mechanisms.

Inventive Principle:

Principle #40Composite materials

4Weight of moving object

If lightweight containers are used for transportation, then ease of handling is improved, but corrosion resistance deteriorates

Engineering Contradiction:

Improvecontainer weightVSAvoidcorrosion resistance

Core Design Contradiction:

Weight of moving objectVSReliability

Solution Approach 1:

The patent employs disposable resin containers that are inherently lightweight while providing sufficient chemical resistance for single-use applications. The resin material resists corrosion from organotin compounds and cleaning agents during the container's service life, and the disposable nature eliminates long-term corrosion issues. This resolves the contradiction by using material properties appropriate for the limited service life requirement.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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 method effectively maintains the high purity of organotin compounds, preventing corrosion, contamination, and decomposition, making it suitable for semiconductor applications.

Implementation Method 1

filling the headspace of the container with an inert gas

Methodology Applied

Scientific EffectInert atmosphere:

Implementation Method 2

the multi-layer container comprises a light-shielding layer

Methodology Applied

Scientific EffectLight blocking: Absorption (EM radiation)

Implementation Method 3

the multi-layer container comprises a gas barrier layer

Methodology Applied

Scientific EffectGas barrier: Permeation

Data Source

PatentUS20250347991A1Method for storing organotin compounds and article

Publication Date: 2025.11.13 GELEST INC

AI summary

A method for storing organotin compounds and an article that is particularly useful for maintaining the high purity of organotin compounds for semiconductor applications is described. The method for storing an organotin compound involves storing the organotin compound in a container and filling the headspace of the container with an inert gas, in which the container is a multilayer resin container containing, at least a light-shielding layer, a gas barrier layer, and an innermost layer, and the material constituting the innermost layer in contact with the organotin compound includes perfluoroalkoxyalkane, polytetrafluoroethylene, phenol resin, and/or ultra-high molecular weight polyethylene.