Magnetic Head Reproducing Structure for Higher-Density Signal Detection
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Solution Overview
Problem
Existing magnetic heads used in HDDs face challenges in achieving improved characteristics for accurate information recording and high recording density.
Innovation Solution
A magnetic head design incorporating a reproducing section with multiple shields and magnetic members, utilizing five terminals and non-magnetic conductive members to enhance signal detection, including materials like Co2MnGa and Weyl ferromagnets, which exploit the anomalous Hall effect for improved signal detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a magnetic head uses conventional magnetic sensor structures, then the device complexity is low, but the measurement precision and recording density are insufficient
Solution Approach 1:
The magnetic head is divided into multiple independent shield layers (first shield, second shield, third shield, fourth shield) and magnetic member portions (first portion, second portion, third portion, fourth portion). Each segment can be independently optimized for signal detection while maintaining overall structural coherence, thereby improving measurement precision without excessive complexity increase
Solution Approach 2:
The patent introduces a fifth terminal connected via a connecting conductive member in a direction crossing the plane of the shield layers, adding a new spatial dimension for signal extraction. This multi-dimensional terminal configuration enables additional signal detection channels, enhancing measurement precision by utilizing spatial diversity in signal acquisition
2Measurement precision
If the magnetic head uses multiple shields and magnetic members, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
Multiple shield layers and magnetic member portions are merged into an integrated reproducing element structure where the shields and magnetic members work together as a unified signal detection system. The connecting conductive member merges multiple terminal connections into a coordinated signal extraction network, reducing the functional complexity despite the increased number of physical components
Solution Approach 2:
The multiple shields and magnetic members serve multiple functions simultaneously: they provide magnetic shielding, detect signal variations, and facilitate signal extraction through different terminals. This multi-functionality reduces the need for separate dedicated components, thereby managing device complexity while maintaining high measurement precision
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 design allows for more accurate reproduction of information on magnetic recording media, facilitating higher recording densities by increasing the variety of signals obtainable and enhancing sensitivity.
Implementation Method 1
utilizing five terminals and non-magnetic conductive members to enhance signal detection, including materials like Co2MnGa and Weyl ferromagnets, which exploit the anomalous Hall effect for improved signal detection
Data Source
AI summary
According to one embodiment, a magnetic head includes a reproducing section including a first reproducing element. The first reproducing element includes first to fourth shields, a first magnetic member, a first connection conductive, first to fifth terminals. The first magnetic member is provided between the first shield and the second shield, and between the third shield and the fourth shield. The first magnetic member includes first to fourth portions. The first terminal is electrically connected to the first portion. The second terminal is electrically connected to the second portion. The third terminal is electrically connected to the third portion. The fourth terminal is electrically connected to the fourth portion. The fifth terminal is electrically connected to the first connecting conductive member.