Data storage device reverse biasing head element to counter electro-migration
AssigneeWestern Digital Technologies, Inc.
InventorsJoey M. POSS, Ian R. MCFADYEN, Jih-Shiuan LUO, Yunfei DING
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Abstract
A data storage device is disclosed comprising a first head actuated over a first disk surface, the first head comprising a plurality of elements including a first element. During a first write operation of the first head, a first bias signal having a first polarity is applied to the first element, and a write interval of the first write operation is measured. During a non-write mode of the first head, a second bias signal having a second polarity opposite the first polarity is applied to the first element during a reverse bias interval that is based on the write interval of the first write operation.
Claims20
A data storage device, comprising:
- a first disk surface;
- a first head actuated over the first disk surface, the first head comprising a plurality of elements including a first element;
- and
- control circuitry configured to:
- during a first write operation of the first head, apply a first bias signal having a first polarity to the first element;
- measure a write interval of the first write operation;
- and
- during a non-write mode of the first head, apply a second bias signal having a second polarity opposite the first polarity to the first element during a reverse bias interval that is based on the write interval of the first write operation.
A method of operating a data storage device, the method comprising:
- during a first write operation of a first head to a first disk surface, applying a first bias signal having a first polarity to a first element of the first head;
- measuring a write interval of the first write operation;
- and
- during a non-write mode of the first head, applying a second bias signal having a second polarity opposite the first polarity to the first element during a reverse bias interval that is based on the write interval of the first write operation.
Dependencies are inferred from the claim text.