Magnetic Recording Medium Friction Control
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Solution Overview
Problem
Magnetic recording media experience increased friction coefficients and decreased running stability due to high friction during sliding between the magnetic layer surface and the magnetic head, leading to instability in data recording and playback, especially with large-capacity media.
Innovation Solution
A recording device that generates a hierarchy of data classification and controls the recording order on a magnetic recording medium with a magnetic layer containing ferromagnetic powder and a binding agent, using a specific spacing difference measured by optical interference to maintain a low friction coefficient and improve stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the magnetic layer surface is controlled to have a specific shape to reduce initial friction coefficient, then the initial friction coefficient is lowered, but the friction coefficient increases with repeated sliding
Solution Approach 1:
The invention changes the physical-chemical parameters of the magnetic layer surface by controlling the spacing between magnetic particles and adjusting the molecular weight and functional groups of the binding agent. This creates a surface with specific friction characteristics that remain stable during repeated sliding operations
Solution Approach 2:
The invention uses a composite binding agent system combining specific polymers with controlled molecular weights and functional groups. This composite material structure provides both low initial friction and maintains stability during repeated sliding by balancing surface properties
2Adaptability or versatility
If random access reading is performed on large-capacity magnetic recording media, then data access flexibility is improved, but the number of reciprocation times increases significantly
Solution Approach 1:
The invention modifies the mechanical parameters of the magnetic layer by controlling particle spacing and binding agent properties, reducing friction during reciprocation to maintain running stability even with frequent access operations
3Object-affected harmful factors
If the magnetic layer surface is smoothed to reduce friction, then initial friction coefficient is lowered, but the surface may become too soft affecting recording quality
Solution Approach 1:
The invention optimizes the spacing parameter between magnetic particles and the molecular weight of binding agents to achieve a surface that is smooth enough for low friction but maintains sufficient hardness and recording quality through precise parameter control
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 solution effectively suppresses the increase in friction coefficient and enhances the running stability of the magnetic recording medium by controlling the spacing difference between different pressures, ensuring consistent performance even with repeated sliding.
Implementation Method 1
a magnetic layer containing a ferromagnetic powder and a binding agent on a non-magnetic support
Implementation Method 2
A difference between a spacing S0.5 measured under a pressure of 0.5 atm by an optical interference method after n-hexane cleaning on a surface of the magnetic layer and a spacing S13.5 measured under a pressure of 13.5 atm by the optical interference method
Data Source
AI summary
An information processing device includes a generation unit that generates a hierarchy of a group that classifies each piece of data from information about each of a plurality of pieces of data to be recorded, and a control unit that controls recording of the plurality of pieces of data included in a group of the hierarchy at a highest level on a magnetic recording medium in a recording order according to an order from an upper hierarchy to a lower hierarchy, for each group of the hierarchy at the highest level. The magnetic recording medium has a magnetic layer containing a ferromagnetic powder and a binding agent on a non-magnetic support. A difference between spacings S0.5 and S13.5 measured under pressures of 0.5 atm and 13.5 atm by an optical interference method after n-hexane cleaning on a surface of the magnetic layer is equal to or less than 3.0 nm.