Liner-Based Assembly for Ultrapure Liquid Purity
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Solution Overview
Problem
Conventional containers, such as rigid-wall containers and single-use plastic bags, often introduce impurities and contaminants into ultrapure liquids, leading to product failure and reduced quality in microelectronic manufacturing and other industries due to particle and bubble generation, leachable chemicals, and chemical reactions.
Innovation Solution
A liner-based assembly with multiple layers, where at least one layer is an active layer incorporating scavengers or inert materials like glass, to actively remove impurities and maintain or enhance the purity of stored materials, including ultrapure liquids, and a getter system for hazardous gases to attract and indicate leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rigid-wall containers are used for storing and dispensing ultrapure liquids, then physical strength and ease of manufacture are improved, but air-liquid interfaces are introduced causing gas dissolution and particle generation
Solution Approach 1:
The patent replaces rigid-wall containers with flexible liner-based containers that eliminate air-liquid interfaces during pressure dispensing. The flexible liner allows liquid to be dispensed without forming air bubbles, thereby preventing gas dissolution and particle generation while maintaining adequate containment strength.
Solution Approach 2:
The patent uses liner materials that create an inert environment compatible with ultrapure liquids, preventing chemical reactions and particle generation. The liner material is selected to be non-reactive and free of leachable contaminants, providing an inert interface between the container and the liquid.
2Ease of operation
If single-use plastic bags/liners are used for storage and delivery, then ease of operation and adaptability are improved, but leachable chemicals and surface adhesion contaminate the contents
Solution Approach 1:
The patent employs composite liner structures with multiple layers having different functions. The inner layer is specifically designed with low extractable and leachable (EL) and low outgassing (EOG) properties to prevent chemical contamination, while outer layers provide structural support and barrier properties. This composite approach maintains ease of use while eliminating chemical contamination risks.
Solution Approach 2:
The patent specifies critical parameters for liner materials including low EL and EOG values, controlled surface energy to minimize adhesion, and specific permeability characteristics. By carefully controlling these material parameters, the liner prevents chemical contamination while maintaining operational ease.
3Reliability
If conventional liners are used, then basic containment is provided, but impurities are not actively removed and purity is not enhanced
Solution Approach 1:
The patent incorporates active purification functionality directly into the liner structure. The liner actively removes impurities from the contained material through integrated filtration or adsorption mechanisms, enabling the containment system to self-purify without requiring external intervention, thereby enhancing purity while maintaining reliable containment.
Solution Approach 2:
The patent combines containment and purification functions into a single integrated liner system. The liner simultaneously provides mechanical containment and active impurity removal through merged functional layers or integrated purification technologies, achieving both reliable containment and enhanced material purity.
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 liner-based assembly effectively maintains and enhances the purity of stored materials by actively removing impurities and preventing gas leaks, reducing contamination risks and ensuring the quality and reliability of ultrapure liquids and hazardous gases.
Implementation Method 1
The active layer may be made active by incorporating a scavenger into the layer
Implementation Method 2
chemical reactions between the contents of the bag and gases permeating through the bag
Implementation Method 3
the active layer may be made active by coating the interior of the layer with an inert material, such as glass
Implementation Method 4
a getter positioned between the container and the liner... a getter may also have a portion configured to change color when the material reacts with gas from the container
Data Source
AI summary
A single use bag for storing a material. The single use bag includes a two layers of which one of the two layers is in contact with the material container within the bag. The layer which is in contact with the material contained within the bag is an active layer. The active layer may be made active by incorporating a scavenger into the layer. At least one layer of the single use bag may include a fluoropolymer.