Glass Hard Disk Cleaning Composition for Surface Smoothness
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Solution Overview
Problem
Conventional cleaning compositions for glass hard disk substrates fail to achieve sufficient surface smoothness and cleanliness, particularly in heat-assisted magnetic recording systems, due to inadequate detergency and surface roughness deterioration during alkaline cleaning.
Innovation Solution
A cleaning composition comprising a specific amine and surface active agent complex, which forms a strong adsorption force on silica particles, reducing aggregation and improving dispersibility, thereby enhancing detergency and maintaining surface smoothness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional cleaning compositions are used to clean glass hard disk substrates, then the cleaning process can remove particles, but the surface roughness deteriorates and cleanliness is insufficient
Solution Approach 1:
The patent changes the chemical parameters of the cleaning composition by specifying precise compositional ranges: inorganic alkali at 1-10% by mass, organic solvent at 5-50% by mass, and water at 40-89% by mass. This parameter optimization enables the composition to achieve both high detergency and surface smoothness maintenance, resolving the contradiction between cleanliness and surface quality
Solution Approach 2:
The patent creates a composite cleaning composition that combines inorganic alkali (for detergency), organic solvent (for particle removal), and water (as solvent base). This composite formulation synergistically achieves both high cleanliness and surface smoothness preservation, overcoming the limitations of conventional single-component cleaners
2Reliability
If alkaline cleaning is performed to improve detergency, then particle removal is enhanced, but surface roughness deteriorates
Solution Approach 1:
The organic solvent acts as an intermediary that bridges the inorganic alkali and the glass substrate. It enables effective particle removal through chemical action while forming a protective interface that prevents direct aggressive interaction between the alkali and the glass surface, thus maintaining surface smoothness during alkaline cleaning
Solution Approach 2:
The patent optimizes the concentration of inorganic alkali to a specific range (1-10% by mass) and controls the organic solvent content (5-50% by mass). These parameter adjustments reduce the aggressiveness of the alkaline cleaning while maintaining effective detergency, thereby preventing surface roughness deterioration
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 cleaning composition achieves high detergency and reduces surface roughness deterioration, providing excellent cleanliness and smoothness for glass hard disk substrates, even under prolonged contact conditions, suitable for heat-resistant amorphous glass substrates.
Implementation Method 1
forms a strong adsorption force on silica particles
Data Source
AI summary
A cleaning composition for a glass hard disk substrate has high detergency and can reduce the deterioration of the surface roughness of a substrate.In an embodiment, the present disclosure relates to a cleaning composition for a glass hard disk substrate, which contains an amine (component A) expressed by the formula (I) and a surface active agent (component B) expressed by the formula (II).