Magnetic Read Element with Symmetric Sensors for Skew Immunity
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Solution Overview
Problem
Modern data storage devices face challenges in maintaining data track alignment at various skew angles, especially with reduced track widths, leading to inefficiencies and performance detriments in two-dimensional magnetic recording due to skew angle-induced misalignment.
Innovation Solution
A magnetic read element is constructed with a plurality of read sensors positioned symmetrically about a pivot point, allowing at least two sensors to concurrently read two-dimensional user data while being immune to skew angle misalignment, enabling efficient alignment with adjacent data tracks across a data media surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple read sensors are positioned to read multiple data tracks simultaneously, then productivity increases through concurrent reading, but measurement precision deteriorates due to skew angle-induced track misalignment
Solution Approach 1:
The patent applies asymmetry by positioning read sensors at non-uniform intervals along the track width direction. Specifically, the first read sensor is positioned at a first interval from the centerline and the second read sensor is positioned at a second interval from the centerline, where these intervals are deliberately asymmetric. This asymmetric positioning creates a geometric configuration that is mathematically immune to skew angle misalignment, allowing simultaneous reading of multiple tracks without the precision degradation that would normally occur with symmetric or uniform positioning.
2Measurement precision
If read sensors are positioned to align with adjacent data tracks, then measurement precision improves for track reading, but adaptability deteriorates when skew angles vary
Solution Approach 1:
The patent employs parameter changes by establishing specific geometric relationships between the read sensors and the data tracks. The intervals from the centerline to each read sensor are carefully selected parameters that satisfy a mathematical relationship: the ratio of the first interval to the second interval equals the ratio of the first track width to the second track width. This parameter configuration ensures that as skew angles vary, the sensors maintain accurate alignment with their respective tracks, simultaneously achieving high measurement precision and broad adaptability to different skew conditions.
Data Source
AI summary
Apparatus for two dimensional data reading. In accordance with some embodiments, a magnetic read element has a plurality of read sensors positioned symmetrically about a pivot point with at least two of the read sensors configured to concurrently read two dimensional user data while being immune to skew angle misalignment.