HAMR Disk Head Restrictor for Impact Resistance
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Solution Overview
Problem
The increased mass of the magnetic head due to the attachment of a laser diode in heat-assisted magnetic recording (HAMR) disk devices leads to vibration and potential collision with opposing heads during impacts, compromising the impact resistance of the disk device.
Innovation Solution
Incorporating a first restrictor, such as a protrusion or restricting member, that comes into contact with the load beam or flexure when the magnetic head moves away from its initial position, thereby restricting further movement and preventing collision with opposing heads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a laser diode is attached to the magnetic head for heat-assisted magnetic recording, then recording capability is improved, but impact resistance deteriorates due to increased mass and vibration
Solution Approach 1:
The restrictor is pre-positioned to come into contact with the load beam or flexure when the magnetic head moves away by a first distance, creating a preliminary counter-action that prevents excessive movement and collision before it can occur during impact events
Solution Approach 2:
The restrictor structure serves as a pre-established protective mechanism that limits the magnetic head's movement range, cushioning against potential collision damage by restricting displacement to within safe boundaries before impact occurs
Data Source
AI summary
According to one embodiment, a disk device includes a magnetic disk, a load beam, a flexure, a head unit, and a first restrictor. The load beam has a first face facing the magnetic disk. The flexure is attached to the first face. The head unit includes: a magnetic head attached to the flexure, configured to read and write information from and to the magnetic disk; and a heat-assister attached to the magnetic head, configured to heat the magnetic disk. The first restrictor is included in the head unit, configured to come in contact with at least one of the load beam and the flexure along with movement of the magnetic head away from the first face by a first distance.