Recording Head Write Pole Height Control via Bumper Polishing
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Solution Overview
Problem
Data storage systems face challenges in maintaining optimal distance between recording heads and storage media to ensure efficient magnetic field strength without causing physical contact, which affects the reliability and durability of the recording heads.
Innovation Solution
Incorporating a bumper and dielectric layer with polishing rates similar to the write pole material in recording heads, providing better support and uniform polishing, thereby controlling the write pole height and maintaining efficient magnetic field strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the write pole is positioned closer to the storage media, then the magnetic field strength is improved, but the write pole may make physical contact with the storage media and be damaged
Solution Approach 1:
The patent introduces a bumper as an intermediary component positioned between the write pole and the storage media. This bumper acts as a protective mediator that prevents direct contact between the write pole and media, thereby protecting the write pole from damage while allowing the magnetic field to effectively reach the storage media.
Solution Approach 2:
The bumper is positioned in advance before any potential contact can occur between the write pole and storage media. This beforehand cushioning mechanism ensures that if distance variations occur during operation, the bumper will absorb the impact before the write pole can make damaging contact with the media.
2Reliability
If the write pole is positioned farther from the storage media, then the write pole durability is improved, but the magnetic field strength becomes too weak to write efficiently
Solution Approach 1:
The bumper serves as a stable intermediary that maintains a consistent gap between the write pole and storage media. This mediator allows the write pole to be positioned at an optimal distance for durability while ensuring the magnetic field remains strong enough for efficient writing operations.
Solution Approach 2:
The patent carefully controls the dimensional parameters of the bumper and write pole assembly to achieve the optimal distance. By adjusting the height and positioning parameters, the system maintains the write pole at a distance that balances magnetic field strength with mechanical durability.
3Ease of manufacture
If materials with different polishing rates are used, then manufacturing flexibility is improved, but the write pole height control precision deteriorates
Solution Approach 1:
The patent applies the homogeneity principle by ensuring that the write pole, bumper, and dielectric layer are made from materials with matching polishing rates. This material homogeneity ensures that during the polishing process, all components wear at the same rate, maintaining precise relative height relationships and ensuring accurate write pole height control.
Solution Approach 2:
The patent uses composite material selection where the write pole, bumper, and dielectric layer are composed of materials specifically chosen to have compatible polishing characteristics. This composite approach allows manufacturing flexibility while maintaining precision through coordinated material properties.
Data Source
AI summary
Recording heads for data storage systems are provided. Recording heads illustratively include a write pole, a bumper, a dielectric layer, and a surface. In some embodiments, a portion of the surface includes portions of the write pole, bumper, and dielectric layer. The write pole, bumper, and dielectric layer are illustratively made from materials that have polishing rates. In some embodiments, the polishing rate for the write pole material is more similar to the polishing rate for the bumper material than it is to the polishing rate for the dielectric layer material.