Grating Structures Control Asymmetry in Magnetic Sensors
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Solution Overview
Problem
Magnetic sensors used in storage media and other applications face limitations in sensitivity, reliability, and stability due to spacing losses and signal distortion, as well as asymmetrical responses that affect data reading accuracy.
Innovation Solution
The development of magnetic sensors with a substrate and leads, featuring a grating or zigzag shape, or both, to enhance sensitivity, reliability, and stability, and to control asymmetry by adjusting the properties of the grating to improve the sensor's response to magnetic fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a magnetic sensor is used in storage media applications, then data reading capability is provided, but sensitivity and reliability are limited by spacing losses and signal distortion
Solution Approach 1:
The patent applies asymmetry by introducing a grating structure with asymmetric properties (different widths, spacing, or depths on opposite sides of the sensor) to compensate for the inherent asymmetry in the sensor's magnetic field response. This asymmetric grating design creates differential effects that counterbalance the sensor's asymmetric response characteristics, thereby improving measurement precision and detection reliability simultaneously.
Solution Approach 2:
The patent employs parameter changes by varying the grating's physical parameters (width, spacing, depth, or pattern) to optimize the sensor's performance. By adjusting these grating parameters, the magnetic field distribution is modified to reduce spacing losses and signal distortion, thereby enhancing both sensitivity and detection reliability.
2Ease of manufacture
If a magnetic sensor operates with asymmetrical response properties, then manufacturing simplicity is maintained, but data reading accuracy deteriorates
Solution Approach 1:
The patent introduces an asymmetric grating structure that is designed to counterbalance the sensor's asymmetric response. By carefully designing the grating's asymmetric parameters (such as different widths or spacing on each side), the overall system achieves symmetric response characteristics, improving data reading accuracy while maintaining manufacturing simplicity through a single integrated structure.
3Device complexity
If the sensor structure is simplified without gratings, then device complexity is reduced, but asymmetry in response cannot be controlled
Solution Approach 1:
The patent uses an asymmetric grating structure as a controlled element to manage and compensate for the sensor's inherent asymmetric response. The grating's asymmetric design is specifically engineered to create counterbalancing effects, allowing control over the response symmetry without significantly increasing device complexity.
Solution Approach 2:
The patent controls response symmetry by adjusting the grating's parameters (width, spacing, depth, or pattern) to optimize the magnetic field interaction. By varying these parameters, the sensor's asymmetric response is compensated, achieving symmetric overall performance with minimal increase in device complexity.
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 configuration increases the sensitivity and accuracy of magnetic sensors, reduces asymmetrical properties, and stabilizes the sensor's response, leading to more reliable data reading and improved performance in detecting magnetic fields.
Implementation Method 1
properties of the grating to control the asymmetry of the response of the magnetic field of the magnetic sensor
Data Source
AI summary
The present invention provides apparatus and method for controlling the asymmetrical properties of the response of a magnetic sensor element to a magnetic field produced by the digital data in a magnetic storage device. The present invention also provides an apparatus and method for controlling the bias point of a magnetic field produced by a magnetic sensor element.