HEAD GIMBAL ASSEMBLY WITH DIAMOND-LIKE COATING (DLC) AT TONGUE/DIMPLE INTERFACE TO REDUCE FRICTION AND FRETTING WEAR
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United States of America Patent
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Issued Date -
Sep 18, 2014
app pub date -
Feb 20, 2014
filing date -
Mar 15, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A gimbal assembly of a single or dual stage actuator is provided with a layer of Diamond-Like Carbon (DLC) as a middle layer at a tongue/dimple interface where a dimple of a supporting loadbeam contacts a tongue on the gimbal assembly. Using the DLC at the tongue/dimple interface greatly reduces the amount of fretting wear particles formed during operation of the microactuator. The reduced wear at the dimple/gimbal interface may provide more stable dynamics over time. The DLC middle layer may be applied on the tongue, or on the tongue only at the tongue/dimple interface, or the DLC may be applied to the dimple.
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