Interlaced High-Power Low-Power Tracks Heat-Assisted Magnetic Recording
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Solution Overview
Problem
Current magnetic storage systems face challenges in increasing storage density without causing thermal instabilities and adjacent track interference, which limits the ability to enhance memory storage capacity within the same physical space.
Innovation Solution
The implementation of heat-assisted magnetic recording (HAMR) technology, where high-power and low-power heated tracks are interlaced, allowing for efficient data writing and rewriting while minimizing erasure of adjacent tracks, using a radiation source to heat localized regions of the magnetic recording material, thereby optimizing track density and data storage capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If storage density is increased by placing tracks closer together, then storage capacity is improved, but thermal instabilities and adjacent track interference occur
Solution Approach 1:
The patent segments the recording medium into distinct zones with different heating power levels (high-power heated tracks and low-power heated tracks). This segmentation allows tracks to be heated at different power levels, reducing thermal interference between adjacent tracks while maintaining high storage density. The interlaced pattern of high and low power tracks creates spatial separation of thermal effects.
Solution Approach 2:
Different regions of the recording medium are assigned different heating power levels based on their specific requirements. High-power heated tracks use one heating level while low-power heated tracks use another level. This local differentiation of heating quality allows optimization of each track's thermal characteristics, reducing cross-track thermal interference while maintaining overall storage density.
2Productivity
If high-power heating is used to write data, then data writing capability is improved, but erasure of adjacent tracks occurs
Solution Approach 1:
The patent applies preliminary anti-action by using low-power heating on tracks that are adjacent to high-power heated tracks. This preemptive low-power heating creates a thermal buffer that prevents the high-power heating from causing erasure on neighboring tracks. The low-power tracks are positioned strategically to counteract the potential harmful thermal effects before they can spread to adjacent tracks.
Solution Approach 2:
The recording medium is divided into alternating high-power and low-power heated track zones. This segmentation isolates the high-power heating effects to specific tracks, preventing thermal spread to adjacent tracks. The low-power zones act as thermal barriers, segmenting the thermal influence and protecting adjacent tracks from erasure.
3Quantity of substance
If track density is increased, then storage capacity is improved, but thermal stability deteriorates
Solution Approach 1:
The patent implements periodic action through the interlaced pattern of high-power and low-power heated tracks. This periodic alternation creates a regular thermal landscape where high-power tracks are periodically separated by low-power tracks. The periodic low-power zones provide regular thermal relief, maintaining thermal stability even as track density increases.
Solution Approach 2:
The high-density track arrangement is segmented into alternating high and low power heating zones. This segmentation prevents continuous high-power heating across all tracks, which would cause thermal instability. The low-power segments break up the thermal continuity, allowing heat dissipation and maintaining thermal stability at high track densities.
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
This approach effectively increases areal and track density, enhancing memory storage capacity while maintaining thermal stability and minimizing interference between tracks, thus improving the overall performance of magnetic storage systems.
Implementation Method 1
heating a first track of a magnetic recording media with a first power using a radiation source
Implementation Method 2
Magnetic storage systems are utilized in a wide variety of devices
Data Source
AI summary
A method, system and apparatus are described for increasing areal density and track density for a data storage system. Media with high magneto-crystalline anisotropy is heated locally during writing, utilizing heating methods such as heat-assisted magnetic recording, energy assisted magnetic recording, thermally assisted recording. In an aspect, high-power heated tracks of a magnetic recording layer are heated and written, and then low-power heated tracks are heated and written. The high-power heated tracks and the low-power heated tracks are interlaced, such that a low-power heated track is situated between two high-power heated tracks. In an aspect, media rewriting speed is increased. In an aspect, the high-power heated tracks and low-power heated tracks are written to at substantially the same data rate and linear density. In an aspect, any erasure of any portion of the high-power heated tracks from heating the low-power heated tracks is avoided, or minimized.