Multi-gas Getters Using Hierarchical Porous Polymer Composites
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Solution Overview
Problem
Conventional getters are limited in their ability to effectively adsorb a broad spectrum of both polar and non-polar gases and organic compounds due to mismatched surface energies, failing to capture a diverse mix of emissions from electronic packages, which can lead to corrosion, contamination, and reduced reliability.
Innovation Solution
A multi-phase hierarchical porous nanostructured polymer composite with tailored surface energy profiles, integrating hydrophilic and hydrophobic microporous and mesoporous domains within a polymer matrix, enabling comprehensive adsorption across various polarities and molecular sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional getters with single-phase reactive metals or zeolite-based materials are used, then specific gases (hydrogen, moisture) can be effectively adsorbed, but the ability to adsorb a broad spectrum of both polar and non-polar gases and organic compounds is limited due to mismatched surface energies
Solution Approach 1:
The patent employs composite materials combining multiple getter phases with different surface energy characteristics. Specifically, it integrates high-surface-energy materials (for polar gases) with low-surface-energy materials (for non-polar gases and organic compounds) to create a composite structure that can adsorb a broad spectrum of emissions, thereby resolving the contradiction between versatility and reliability.
Solution Approach 2:
The invention applies local quality by creating distinct regions within the getter structure with different surface energy properties. High-surface-energy zones target polar gases like moisture and CO2, while low-surface-energy zones capture non-polar gases and organic compounds. This spatial differentiation of functional properties enables comprehensive gas adsorption capability.
2Reliability
If getters are optimized for specific emission types (hydrogen, moisture), then effective adsorption of those specific gases is achieved, but they fail to capture a diverse mix of emissions including organic compounds
Solution Approach 1:
The patent implements universality by designing a multi-functional getter system that can simultaneously perform multiple adsorption functions. The composite structure incorporates materials capable of adsorbing polar gases, non-polar gases, and organic compounds of various molecular sizes, making the getter universally effective against diverse emissions from electronic packages.
Solution Approach 2:
The invention utilizes parameter changes by varying the surface energy parameter across different phases of the getter material. By incorporating materials with surface energies ranging from high (for polar gases) to low (for non-polar gases and organics), the system achieves broad-spectrum adsorption capability while maintaining high effectiveness for each specific gas type.
3Ease of manufacture
If single-surface-energy materials are used, then the getter structure is simpler, but it cannot comprehensively adsorb the full spectrum of outgassed gases and organic compounds
Solution Approach 1:
The patent employs composite materials combining multiple getter phases with different surface energy characteristics. Specifically, it integrates high-surface-energy materials (for polar gases) with low-surface-energy materials (for non-polar gases and organic compounds) to create a composite structure that can adsorb a broad spectrum of emissions, thereby resolving the contradiction between versatility and reliability.
Solution Approach 2:
The invention applies local quality by creating distinct regions within the getter structure with different surface energy properties. High-surface-energy zones target polar gases like moisture and CO2, while low-surface-energy zones capture non-polar gases and organic compounds. This spatial differentiation of functional properties enables comprehensive gas adsorption capability.
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 composite achieves efficient adsorption of a wide range of gases and organic compounds, enhancing the reliability of electronic packages by minimizing corrosion and contamination, and maintaining performance across diverse operational conditions.
Implementation Method 1
These getters are typically composed of single-phase reactive metals, such as titanium (Ti), zirconium (Zr), tantalum (Ta), vanadium (V), and alloys like Zr—V—Fe, Zr—Al, Zr—Ti—V, and Ti—V—Cr. NEGs primarily operate through chemisorption, where gases chemically react with the getter material to form stable compounds, and sometimes through physisorption on the getter's surface.
Implementation Method 2
NEGs primarily operate through chemisorption, where gases chemically react with the getter material to form stable compounds
Implementation Method 3
A multi-phase hierarchical porous nanostructured polymer composite with tailored surface energy profiles, integrating hydrophilic and hydrophobic microporous and mesoporous domains within a polymer matrix, enabling comprehensive adsorption across various polarities and molecular sizes.
Data Source
AI summary
This disclosure presents multi-phase hierarchical porous nanostructure-based polymer composites and associated getter assemblies designed for scavenging multi-gas and organic compounds outgassed from electronic packages, devices, and modules. The composites integrate hydrophilic microporous, hydrophobic microporous, and hydrophobic mesoporous nanoparticles within a polymer matrix to form binary, ternary, or quaternary multi-phase structures. These polymer composites are utilized to fabricate getter assemblies featuring single-layer, bi-layer, or multi-layer configurations on a substrate. The assemblies are tailored to selectively target specific polar and non-polar gases and organic compounds or to adsorb a broad spectrum of outgassed emissions, irrespective of their polarity, molecular size, or surface energy characteristics.