Gas Barrier Layer for HAMR Write Pole Oxidation
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Solution Overview
Problem
Heat-assisted magnetic recording (HAMR) technologies face issues with oxidation and corrosion of the write pole and adhesion layers due to high temperatures, leading to deformation, pole oxidation, and reduced magnetic field delivery during recording operations.
Innovation Solution
Incorporating a gas barrier layer and a wear resistance layer, including materials like tantalum oxide, titanium oxide, and silicon carbide, adjacent to the near field transducer (NFT) and magnetic write pole to prevent gas exposure and enhance structural integrity, thereby reducing oxidation and corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If heat-assisted magnetic recording (HAMR) is used to improve recording density, then magnetic field delivery is enhanced, but oxidation and corrosion of the write pole and adhesion layers occur due to high temperatures
Solution Approach 1:
A gas barrier layer is introduced as an intermediary between the write pole/adhesion layers and the external environment. This barrier layer blocks gas molecules from reaching and oxidizing/corroding the sensitive components during HAMR operation, while allowing the thermal field to pass through for magnetic recording.
Solution Approach 2:
The gas barrier layer creates a protective environment around the write pole and adhesion layers, effectively isolating them from reactive gases (particularly oxygen) that cause oxidation and corrosion at elevated temperatures during HAMR operations.
2Power
If high temperatures are applied during HAMR operations, then magnetic field delivery is improved, but deformation and pole oxidation occur
Solution Approach 1:
The gas barrier layer serves as a protective intermediary that shields the write pole structure from direct exposure to oxidizing gases during high-temperature HAMR operations, preventing pole oxidation while maintaining the thermal conditions necessary for magnetic field delivery.
Solution Approach 2:
The gas barrier layer is deposited on the write pole and adhesion layers before HAMR operations begin, establishing a protective barrier in advance that prevents oxidation and corrosion during subsequent high-temperature magnetic recording operations.
3Reliability
If gas barrier layers are added to prevent oxidation, then reliability is improved, but device complexity increases
Solution Approach 1:
The gas barrier layer is implemented as a thin film structure that provides effective oxidation and corrosion protection without adding significant structural complexity or volume to the HAMR device. The thin film nature allows it to be integrated into the existing multi-layer structure with minimal additional 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
The solution effectively diminishes gas exposure, preventing oxidation and corrosion, and maintaining the magnetic field strength, thus improving the reliability and durability of HAMR devices.
Implementation Method 1
a gas barrier layer positioned on at least a portion of the NFT and the magnetic write pole
Implementation Method 2
a wear resistance layer positioned on at least a portion of the gas barrier layer
Data Source
AI summary
Devices that include a near field transducer (NFT); a gas barrier layer positioned on at least a portion of the NFT; and a wear resistance layer positioned on at least a portion of the gas barrier layer wherein the gas barrier layer includes tantalum oxide (TaO), titanium oxide (TiO), chromium oxide (CrO), silicon oxide (SiO), aluminum oxide (AlO), titanium oxide (TiO), zirconium oxide (ZrO), yttrium oxide (YO), magnesium oxide (MgO), beryllium oxide (BeO), niobium oxide (NbO), hafnium oxide (HfO), vanadium oxide (VO), strontium oxide (SrO), or combinations thereof; silicon nitride (SiN), aluminum nitride (Al), boron nitride (BN), titanium nitride (TiN), zirconium nitride (ZrN), niobioum nitride (NbN), hafnium nitride (HfN), chromium nitride (CrN), or combinations thereof; silicon carbide (SiC), titanium carbide (TiC), zirconium carbide (ZrC), niobioum carbide (NbC), chromium carbide (CrC), vanadium carbide (VC), boron carbide (BC), or combinations thereof; or combinations thereof.