Burnishing Apparatus Skiving Edges Tape Surface Defects
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Solution Overview
Problem
In magnetic tape storage systems, the development of high-density tape drive systems poses challenges in designing tape head assemblies due to the need for near-contact magnetic flux recording and reading, which is affected by tape surface defects and friction issues that can lead to wear and data integrity problems.
Innovation Solution
An apparatus with a media bearing surface featuring alternating channels and lands with skiving edges, inducing a wrap angle greater than zero degrees to blunt and smooth tape surface defects, reducing friction and wear by using hard materials like silicon carbide or composite materials for the burnishing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tape head is designed to minimize spacing between head and tape for near-contact magnetic flux recording and reading, then magnetic coupling efficiency is improved, but tape surface defects and friction cause wear and data integrity problems
Solution Approach 1:
The burnishing apparatus performs preliminary action by pre-smoothing the tape surface through mechanical abrasion before the tape is used for recording. The apparatus includes a burnishing surface with abrasive material that contacts the tape and removes surface defects, creating a smoother surface that reduces friction and wear during subsequent recording operations, thereby maintaining reliable magnetic coupling without the harmful effects of surface defects
Solution Approach 2:
The burnishing apparatus acts as an intermediary between the tape manufacturing process and the recording process. It introduces a intermediate step that conditions the tape surface, removing defects and optimizing surface properties before the tape enters the recording system. This intermediary device protects the recording system from tape surface issues while maintaining the necessary near-contact magnetic coupling
2Manufacturing precision
If high-density tape drive systems are developed to increase data density, then track and linear bit density are improved, but tape thickness decreases creating design challenges
Solution Approach 1:
The invention changes the surface parameters of the tape by smoothing surface defects and optimizing surface roughness through the burnishing process. This parameter change in tape surface properties helps maintain effective magnetic coupling even as tape thickness decreases in high-density systems, thereby supporting higher track and linear bit density without proportionally increasing head assembly design complexity
3Reliability
If the tape surface is smoothed to reduce friction and wear, then data integrity is improved, but additional processing steps are required
Solution Approach 1:
The burnishing apparatus performs the smoothing action as a preliminary step before recording operations. By pre-smoothing the tape surface and removing defects in advance, the system reduces friction and wear during actual recording, thereby improving data integrity. The preliminary nature of this action allows the main recording process to proceed more simply without needing complex in-process surface adjustment mechanisms
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 preconditions the tape media by blunting and smoothing surface defects, reducing wear and friction, and enhancing data integrity by maintaining near-contact magnetic coupling while minimizing damage to tape heads.
Implementation Method 1
Each of the lands has at least one skiving edge along a width thereof... inducing a wrap angle of the media relative to media bearing surfaces of at least some of the lands... effectively preconditions the tape media by blunting and smoothing surface defects
Implementation Method 2
reducing friction and wear by using hard materials like silicon carbide or composite materials for the burnishing process
Data Source
AI summary
An apparatus for burnishing media, according to one embodiment, includes a first block with a media bearing surface having a plurality of channels and lands. The channels and lands alternate in a direction of media travel. Each of the lands has at least one skiving edge along a width thereof. The width of each land extends orthogonally to the direction of media travel. The apparatus also includes a mechanism for inducing a wrap angle of the media relative to media bearing surfaces of at least some of the lands. Each induced wrap angle is greater than zero degrees. An apparatus for burnishing media according to another embodiment includes channels having widths that are less than a width of the media.