Head Gimbal Assembly Laser Offset for Interference Reduction
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Solution Overview
Problem
In high-density data storage devices, the integration of laser light for heating data media leads to mechanical interference due to the large components required, which complicates data access and storage in compact form factors, especially when multiple head gimbal assemblies (HGAs) are positioned closely together.
Innovation Solution
A head gimbal assembly with a slider that has a laser assembly mounted on a single longitudinal side, allowing for data access without interference, enabling multiple HGAs to be positioned adjacent to each other in a common head-to-head spacing by offsetting the laser assembly on the slider to prevent mechanical interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If laser assembly is integrated into head gimbal assembly for heat assist data storage, then data access efficiency is improved, but mechanical interference occurs due to large component size
Solution Approach 1:
The laser assembly is repositioned from a central or interfering location to the distal end of the slider, utilizing the longitudinal dimension of the slider to place the laser away from the head-to-head spacing region. This dimensional relocation eliminates mechanical interference while preserving the laser's data access function.
Solution Approach 2:
The slider acts as an intermediary carrier that holds both the transducing head and the laser assembly. By positioning the laser at the distal end of the slider, the slider mediates between the laser and the data storage media, allowing the laser to heat the media through the slider's structure without direct mechanical interference with adjacent heads.
2Quantity of substance
If multiple head gimbal assemblies are positioned closely together for high density storage, then data storage capacity is improved, but mechanical interference between laser assemblies occurs
Solution Approach 1:
The laser assemblies are positioned asymmetrically at the distal ends of their respective sliders, rather than centrally or symmetrically. This asymmetric positioning ensures that when multiple HGAs are closely spaced, the laser assemblies are offset from the interference zone between adjacent heads, allowing high-density configuration without mechanical interference.
Solution Approach 2:
By utilizing the longitudinal extension of the slider to position lasers at distal ends, the design relocates potential interference points to a dimension (longitudinal distance from the head) where multiple HGAs can coexist without mechanical conflict, enabling higher data storage capacity.
3Volume of moving object
If laser assembly is positioned to avoid mechanical interference, then device form factor is reduced, but laser alignment precision may be compromised
Solution Approach 1:
The patent replaces complex mechanical alignment mechanisms with an integrated slider structure that inherently positions the laser at its distal end. This structural integration eliminates the need for additional alignment mechanisms, maintaining compact form factor while ensuring consistent laser positioning and alignment through the slider's rigid structure.
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 allows for efficient data access and storage in reduced form factor devices by minimizing mechanical interference, enabling increased data density and capacity without compromising operational reliability.
Implementation Method 1
the inclusion of laser light to heat the data media and allow for more efficient data access
Data Source
AI summary
An apparatus and associated method for a head gimbal assembly for data transduction in a data storage device with a heat assist laser. Various embodiments of the present invention are generally directed to a slider supporting at least a transducing element on an air bearing surface (ABS) and a laser assembly directly attached to a top side of the slider opposite the ABS. The laser assembly is positioned on the top side with no portion of the laser assembly extending past a longitudinal centerline of the slider.