Multi-writer Recording Head for Simultaneous Track Writing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current magnetic disk storage technologies face challenges in increasing areal density by writing to multiple tracks simultaneously, as existing systems can only read adjacent tracks simultaneously, not write to them simultaneously, which limits the full realization of two-dimensional magnetic recording (TDMR) advantages.
Innovation Solution
A recording head with multiple magnetic writers offset in both downtrack and crosstrack directions, enabled by leads delivering specific write and/or laser currents, allowing simultaneous writing to adjacent tracks on a magnetic disk, utilizing configurations such as dual or triple writer arrangements with adjustable skew angles and track pitches to optimize track spacing and writing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple magnetic writers are used to write to multiple tracks simultaneously, then areal density and data throughput are improved, but device complexity increases
Solution Approach 1:
The recording head is divided into multiple independent magnetic writers (first magnetic writer, second magnetic writer, etc.), each capable of writing to a separate track simultaneously. This segmentation enables parallel writing operations across multiple tracks, thereby increasing data throughput and areal density while managing complexity through modular design
Solution Approach 2:
The patent transitions from single-track writing to multi-track simultaneous writing by adding the track dimension to the writing operation. Multiple writers are positioned at different crosstrack locations, enabling parallel operations across the track dimension, which significantly increases productivity without proportionally increasing complexity
2Manufacturing precision
If multiple magnetic writers are offset in downtrack and crosstrack directions, then track spacing and writing performance are optimized, but manufacturing precision requirements increase
Solution Approach 1:
The magnetic writers are intentionally positioned with asymmetric offsets in both downtrack and crosstrack directions. This asymmetric arrangement optimizes track spacing and writing performance by accounting for skew angles and magnetic field characteristics, achieving precise track alignment despite the complex positioning requirements
Solution Approach 2:
The patent employs adjustable skew angles and track pitches as key parameters to optimize the positioning of multiple magnetic writers. By carefully controlling these parameters, the system achieves optimal track spacing and writing performance while managing the manufacturing precision requirements through parameter optimization rather than rigid structural constraints
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
Enables simultaneous writing to adjacent tracks, enhancing areal density and data throughput in magnetic disk storage devices, while maintaining cost-effectiveness by optimizing track spacing and reducing interference between tracks.
Implementation Method 1
a first magnetic writer and a second magnetic writer offset from the first magnetic writer in a downtrack and crosstrack direction
Implementation Method 2
The recording head has leads configured to deliver respective first and second write and/or laser currents to the first and second writers
Data Source
AI summary
A recording head has a first magnetic writer and a second magnetic writer offset from the first magnetic writer in a downtrack and crosstrack direction. The recording head has leads configured to deliver respective first and second write and/or laser currents to the first and second writers. The first and second write and/or laser currents enable the first and second writers to simultaneously write to adjacent tracks of a magnetic disk.