Patent · US Active

Concurrent modulation and frictional heating head disk contact detection

US9548072B2 · kind B2 · utility

2Cited by

21References

18Claims

0Family size

Assignee

Seagate Technology LLC · US

Inventors

Huazhou Lou · Eden Prairie, US
Jason W. Riddering · Prior Lake, US
Shawn Stephen Silewski · Eden Prairie, US
Dongming Liu · Eden Prairie, US
Lin Zhou · Beijing, CN

Key dates

Filing date	Feb 11, 2015
Grant date	Jan 17, 2017
Priority date	—
Expiry date	Feb 11, 2035

Classification

Technology area (CPC G)Physics
CPC primaryG11B2220/2525
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An apparatus comprises a heat-assisted magnetic recording (HAMR) head, a sensor, and a controller. The HAMR head is configured to interact with a magnetic storage medium. The sensor is configured to produce a signal indicating the occurrence of head-medium contact. The controller is configured to receive the signal and concurrently determine from the signal if the occurrence of head-medium contact is caused by a first contact detection parameter, a second contact detection parameter, or both the first and second contact detection parameters.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.