Fluoropolyether Lubricant for Magnetic Disk Adsorbability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lubricants for magnetic disks lack excellent adsorbability on the surface and contamination resistance, which are crucial for maintaining durability as recording density increases.
Innovation Solution
A fluoropolyether compound with a hydroxyalkenyl or hydroxyalkynyl group at its terminal is used, providing enhanced adsorbability and contamination resistance by forming strong bonds with the protective layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lubricant compounds are used, then the lubricant can be applied to magnetic disks, but the adsorbability on the surface and contamination resistance are insufficient
Solution Approach 1:
The patent changes the chemical structure parameters of the lubricant compound by introducing hydroxyalkenyl or hydroxyalkynyl groups at the terminal of the perfluoropolyether chain. This structural modification enables the lubricant to form strong bonds with the magnetic disk surface, significantly improving adsorbability and contamination resistance while reducing impurity attachment.
Solution Approach 2:
The patent creates a composite chemical structure combining perfluoropolyether with hydroxyalkenyl or hydroxyalkynyl groups. This composite structure integrates the beneficial properties of both components: the perfluoropolyether provides stability and low friction, while the hydroxyalkenyl/alkynyl groups provide strong surface bonding and contamination resistance.
2Productivity
If recording density is increased, then information storage capacity improves, but the distance between magnetic head and disk surface decreases to ten nanometers requiring enhanced lubricant stability
Solution Approach 1:
The patent modifies the molecular structure of the lubricant compound by incorporating hydroxyalkenyl or hydroxyalkynyl groups, which enable strong adhesion to the magnetic disk surface. This allows the lubricant to maintain excellent stability and performance even when formed into ultra-thin films at ten nanometer thickness required for high recording density applications.
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 fluoropolyether compound significantly improves the bonding ratio and siloxane resistance, reducing impurity attachment and enhancing the durability of magnetic disks.
Implementation Method 1
a lubricant excellent in adsorbability on the surface of a magnetic disk
Implementation Method 2
a lubricant excellent in adsorbability on the surface of a magnetic disk and in contamination resistance
Data Source
AI summary
An object of an aspect of the present invention is to provide: a lubricant excellent in adsorbability on the surface of a magnetic disk and in contamination resistance; and a magnetic disk which uses the lubricant and which is excellent in durability. The lubricant in accordance with an aspect of the present invention contains a fluoropolyether compound having, at a terminal thereof, a hydroxyalkenyl group or a hydroxyalkynyl group.