Fluorinated Ether Lubricant for HAMR Disk Oxidation Resistance
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Solution Overview
Problem
Conventional lubricants used in magnetic disk devices with energy-assisted recording technologies, such as HAMR, face challenges with heat resistance and oxidative decomposition in oxygen-containing atmospheres, leading to reduced lubrication effectiveness.
Innovation Solution
A fluoropolyether compound is developed with specific structural modifications, including perfluoropolyether groups, hydrocarbon groups with multiple OH or cyclic structures, and ether bonds, which are fluorinated to enhance heat resistance and stability, preventing decomposition in oxygen-containing environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional lubricants are used in HAMR magnetic disk devices, then basic lubrication function is provided, but heat resistance deteriorates under high temperature conditions
Solution Approach 1:
The patent modifies the chemical structure of the lubricant by introducing fluorinated groups and specific hydrocarbon side chains with OH groups or cyclic structures. This changes the chemical parameters of the lubricant molecule to enhance thermal stability and resistance to oxidative decomposition, allowing it to maintain lubrication effectiveness at HAMR operating temperatures
Solution Approach 2:
The lubricant is designed as a composite molecular structure combining perfluoropolyether backbone with fluorinated hydrocarbon side chains. This composite structure integrates the heat resistance of fluorinated groups with the adhesion properties of hydrocarbon groups containing OH or cyclic structures, achieving both high temperature stability and reliable lubrication
2Reliability
If lubricants are exposed to oxygen-containing atmosphere during HAMR, then normal operation is maintained, but oxidative decomposition occurs leading to reduced lubrication action
Solution Approach 1:
The patent converts the harmful effect of oxygen exposure into a beneficial outcome by designing the lubricant molecule to resist oxidation. The fluorinated structure and specific hydrocarbon side chains create chemical bonds that are less susceptible to oxidative decomposition, transforming the previously harmful oxygen-containing environment into a condition where the lubricant maintains stability
Solution Approach 2:
The chemical structure is modified by introducing fluorine atoms and specific hydrocarbon groups with OH or cyclic structures, changing the oxidation resistance parameter of the lubricant. This structural parameter change enables the lubricant to withstand oxygen exposure without significant decomposition, maintaining lubrication effectiveness in HAMR operations
Data Source
AI summary
An object to provide a lubricant that makes it possible, in a magnetic disk device in which energy assisted recording technology such as HAMR is employed, to prevent or reduce oxidative decomposition in an oxygen-containing atmosphere and maintain high heat resistance in the oxygen-containing atmosphere is attained by a fluoropolyether compound containing at least one ether bond in a molecule, wherein at least one hydrogen atom bonded to a carbon atom bonded to an oxygen atom of the ether bond in the molecule is substituted with fluorine.