Magnetic Head Shield Conductor Layout for Heat-Stable Sensing
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Solution Overview
Problem
Magnetic heads in magnetic recording devices face challenges in maintaining stable characteristics due to heat generation in the magnetic members, which can lead to deterioration and affect performance.
Innovation Solution
Incorporating non-magnetic shield conductive members made of materials like Cu, Al, or Ag to dissipate heat efficiently, ensuring the magnetic members operate within optimal temperature ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic members are used in the reproducing section, then magnetic sensing function is improved, but heat generation increases causing deterioration
Solution Approach 1:
A non-magnetic shield conductive member is introduced as an intermediary between the magnetic member and the external environment. This shield conductive member has high thermal conductivity but does not interfere with the magnetic sensing function, allowing heat to be conducted away from the magnetic member while maintaining its sensing capabilities
Solution Approach 2:
The patent converts the harmful heat generated by the magnetic member into a manageable thermal conduction problem. By providing the shield conductive member with high thermal conductivity, the previously harmful heat generation is transformed into a controllable thermal flow that can be efficiently dissipated, turning a negative effect into a solvable engineering challenge
2Temperature
If shield conductive members are added to dissipate heat, then temperature control is improved, but device complexity increases
Solution Approach 1:
The shield conductive member performs multiple functions simultaneously: it acts as a thermal conduction path to dissipate heat from the magnetic member, provides electromagnetic shielding, and serves as a structural component of the reproducing section. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity
Solution Approach 2:
The patent merges the shielding function and the thermal management function into a single integrated component - the shield conductive member. By combining these functions that were previously handled by separate components, the overall device complexity is minimized while achieving both electromagnetic shielding and effective heat dissipation
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
The implementation of these conductive members effectively reduces the temperature of the magnetic members, enhancing the stability and performance of the magnetic heads by preventing heat-induced deterioration.
Implementation Method 1
Incorporating non-magnetic shield conductive members made of materials like Cu, Al, or Ag to dissipate heat efficiently
Data Source
AI summary
According to one embodiment, a magnetic head includes a reproducing section. The reproducing section includes a first shield, a second shield, a third shield, a fourth shield, a first magnetic member, a first terminal, a second terminal, a third terminal, a fourth terminal, and a third shield conductive member. A direction from the first shield to the second shield is along a first direction. A second direction from the third shield to the fourth shield crosses the first direction. 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 to fourth terminals are electrically connected to the first to fourth shields, respectively. The third shield conductive member is connected to the third shield and includes at least one selected from the group consisting of Cu, Al, Au, and Ag.