Phosphonic Acid TIM Formulation to Reduce Oil Bleed Spreading
Solution Overview
Problem
Thermal interface materials (TIMs) face challenges in managing heat and electromagnetic interference (EMI) effectively, leading to inefficiencies and potential degradation of electrical components due to excessive temperatures and interference.
Innovation Solution
Incorporation of phosphonic acid as an additive or treatment for thermally-conductive fillers in TIMs, enhancing properties such as rheology, aging, shelf life, and adhesion, while reducing material spreading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If thermal interface materials are used to improve heat transfer, then thermal conductivity is improved, but material spreading and oil bleed occur
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition parameters of the TIM formulation. Specifically, it adjusts the ratios of base materials, functional materials, and additives to optimize both thermal conductivity and composition stability. The patent also changes the molecular structure parameters of the base material to achieve better balance between heat transfer and material stability.
Solution Approach 2:
The patent employs composite materials by combining multiple components with different functions. The TIM comprises base materials providing structural stability, functional materials enhancing thermal conductivity, and additives controlling material spreading. This composite approach allows simultaneous optimization of thermal performance and composition stability.
2Temperature
If thermal interface materials are used to manage heat, then heat transfer efficiency is improved, but adhesion and aging properties deteriorate
Solution Approach 1:
The patent modifies chemical composition parameters and curing conditions to simultaneously achieve high heat transfer efficiency and reliable adhesion. By adjusting the functional material content and curing parameters, the patent optimizes both thermal performance and aging resistance.
Solution Approach 2:
The patent introduces coupling agents as intermediary substances that enhance the bond between the TIM and substrate surfaces. These coupling agents improve adhesion without compromising thermal conductivity, and they also enhance aging resistance by creating a stable interface between different materials.
3Ease of manufacture
If conventional TIM formulations are used, then manufacturing is simple, but shelf life is limited
Solution Approach 1:
The patent extends shelf life by modifying the chemical stability parameters of the formulation. It uses chemically stable base materials and optimizes the compatibility of all components to prevent degradation during storage. The curing system is designed to remain dormant during storage and activate only under specific processing conditions.
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
Improves thermal conductivity, reduces thermal resistance, enhances adhesion, and mitigates EMI, resulting in better heat management and operational stability of electronic devices.
Implementation Method 1
The composite includes one or more fillers that are thermally-conductive
Implementation Method 2
the one or more fillers are pretreated with the phosphonic acid, surface-modified with the phosphonic acid, and/or coated with the phosphonic acid
Data Source
AI summary
The present disclosure relates to the use of phosphonic acid to enhance performance of thermal interface materials (broadly, composites), e.g., by improving rheological properties, improving aging properties, improving shelf life, improving tack/adhesion, and/or reducing the spreading of material(s), if any, migrating therefrom (e.g., reduced oil bleed spreading, etc.). The present disclosure also relates to methods of using phosphonic acids for enhancing performance of composites useful for management of heat and/or electromagnetic interference (EMI). The composite may comprise thermal management and/or electromagnetic interference (EMI) mitigation materials, such as thermal interface materials (TIMs), EMI absorber materials, thermally-conductive EMI absorber materials, electrically-conductive materials, combinations thereof, etc.