Spherical Particle Cleaning Tape for Hard Disk Surface
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Solution Overview
Problem
Conventional cleaning tapes with fixed abrading particles are inadequate for removing small protrusions and particles from the surface of magnetic hard disks without causing scratches, failing to meet the high cleanliness and quality standards required in high-density recording technologies.
Innovation Solution
A cleaning tape with a synthetic resin base and a cleaning layer containing spherical particles dispersed in a single layer, where the binding agent gathers around the particles to enhance adhesion and reduce scratch formation, allowing effective removal of unwanted protrusions and particles without micro-scratches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If hard abrading particles such as alumina, SiC or diamond particles are used in the cleaning layer, then unwanted protrusions can be removed from the surface, but particles cannot sufficiently remove attached objects and may cause scratches on the film surface
Solution Approach 1:
The patent replaces conventional angular hard particles with spherical particles in the cleaning layer. The spherical shape allows particles to contact the film surface at points rather than edges, reducing scratching while maintaining cleaning capability. The spherical particles effectively remove protrusions and attached objects without the harmful edge effects that cause scratches.
Solution Approach 2:
The patent changes the shape parameter of the abrading particles from angular to spherical. This parameter change fundamentally alters the interaction between particles and the film surface, enabling removal of contaminants while minimizing mechanical damage. The spherical geometry provides a different contact mechanics that preserves film integrity.
2Productivity
If conventional cleaning tapes with fixed abrading particles are used, then cleaning can be performed, but the abrading particles do not effectively contact the surface of the target object, resulting in poor cleaning effect for very small particles
Solution Approach 1:
The patent employs flexible spherical particles that can dynamically adapt their contact points to the surface topology of the target object. Unlike rigid fixed particles, the spherical particles can deform and reorient themselves to maintain effective contact with irregular surfaces, enhancing cleaning efficiency across different surface conditions and particle sizes.
Solution Approach 2:
The spherical shape enables the particles to roll and reorient during cleaning operations, maintaining continuous contact with the surface. This dynamic spherical motion allows the particles to effectively engage with very small particles and irregular surface features, significantly improving cleaning efficiency compared to fixed angular particles.
3Manufacturing precision
If the cleaning layer uses a single layer of dispersed spherical particles, then uniform contact with the target object is achieved, but the binding agent may detach from the spherical particles
Solution Approach 1:
The patent uses a composite structure combining spherical particles with a binding agent matrix. The binding agent forms a continuous phase that embeds and secures the spherical particles, creating a stable composite cleaning layer. This composite approach maintains uniform particle distribution and contact characteristics while preventing particle detachment during use.
Solution Approach 2:
The patent achieves homogeneous distribution of spherical particles throughout the cleaning layer matrix. The uniform dispersion ensures consistent contact properties across the entire cleaning layer surface, while the homogeneous binding agent distribution provides uniform adhesion strength, preventing localized particle detachment.
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 tape effectively removes small protrusions and particles from magnetic hard disks and lubricating films without forming micro-scratches, maintaining high cleanliness and quality standards while reducing the risk of particle detachment and clogging.
Implementation Method 1
the binding agent gathers around the spherical particles due to the surface tension of the binding agent such that the bond becomes rather stronger
Implementation Method 2
the spherical particles contained in the cleaning layer are dispersed into a single particle layer... the contact to the target object for cleaning becomes more effective
Data Source
AI summary
A cleaning tape has a base tape made of a synthetic resin and a cleaning layer formed on a surface of this base tape. The cleaning layer has a binding agent and a large number of spherical particles dispersed in the binding agent in a single particle layer. Such a cleaning tape is capable of removing very small unwanted protrusions and particles on the surface of a target object such as a magnetic hard disk without forming scratches.