Multi-level Magnetic Recording Head Track Density
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Solution Overview
Problem
Conventional magnetic recording heads are limited in data storage capacity due to the width of the recording media and the precision of track placement, as they typically consist of multiple arrays of read-write devices glued together, which restricts the number of tracks that can be written on a single tape.
Innovation Solution
A magnetic recording head design featuring two levels of read-write devices aligned in a linear pattern on a shared substrate, with insulating gaps between them, allowing for increased track density by staggering the devices and reducing the effective pitch between them, thereby enabling more tracks to be written on a single tape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple arrays of read-write devices are glued together to form conventional magnetic recording heads, then the structure is simple to manufacture, but the number of tracks that can be written on a single tape is limited
Solution Approach 1:
The patent transitions from a single-level linear arrangement of read-write devices to a multi-level three-dimensional configuration. Devices are arranged in multiple levels (first level, second level, third level) stacked vertically, allowing tracks to be written in multiple dimensions. This dimensional change enables significantly more tracks to be written on a single tape without complicating the manufacturing process, as each level can be manufactured separately and then assembled.
Solution Approach 2:
The patent implements a nested structure where multiple levels of read-write devices are stacked one above another, with each level containing multiple devices arranged linearly. The levels are nested vertically on a common substrate, creating a compact multi-dimensional array that maximizes track density within the physical constraints of the recording head width.
2Quantity of substance
If the width of the recording media is increased to store more data, then more tracks can be written, but the precision of track placement relative to neighboring tracks becomes more difficult to maintain
Solution Approach 1:
Instead of increasing the horizontal width of the recording media, the patent adds a vertical dimension by stacking multiple levels of read-write devices. This allows the effective width of the recording head to be increased in the vertical direction while maintaining the same horizontal footprint on the tape, thereby preserving track placement precision while increasing data storage capacity.
Solution Approach 2:
The patent divides the recording head into multiple discrete levels, each containing multiple read-write devices. This segmentation allows each level to be precisely manufactured and positioned independently, with insulating gaps providing precise spacing between levels. The segmented structure enables accurate track placement while accommodating a larger total number of tracks.
3Quantity of substance
If the size of read-write devices is reduced to increase track density, then more tracks can be written on a single tape, but the manufacturing precision requirements increase
Solution Approach 1:
The patent segments the recording head into multiple levels with multiple devices per level, arranged in a grid-like pattern. This segmentation allows the use of larger individual read-write devices while achieving high track density through the multi-level configuration. Each device can be manufactured with standard precision, and the overall density is achieved through the systematic arrangement of many devices across multiple levels.
Data Source
AI summary
In at least one embodiment, a magnetic recording head comprising first and second linear levels of magnetic recording devices is provided. Each device in the first linear level is aligned adjacently in a row and is spaced apart from another device in the first linear level. The first linear level is perpendicular to a comparative direction of a recording media travel. The second linear level of magnetic recording devices being connected to the first linear level of magnetic recording devices. Each device in the second linear level is aligned adjacently in a row and is spaced apart from another device in the second linear level. Each device in the second linear level is aligned with an insulating gap between the each device in the first linear level.