Implementing write head device for contact detection and spacing sensing
US9117474B1 · kind B1 · utility
16Cited by
14References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 2, 2014 |
| Grant date | Aug 25, 2015 |
| Priority date | — |
| Expiry date | Oct 2, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method, apparatus, and system are provided for implementing a write head device for writer-to-disk contact detection and spacing sensing of recording heads in hard disk drives (HDDs). A write head device, such as a spin-torque oscillator (STO), is provided between a main pole tip and a surrounding magnetic shield of the writer in the recording head. A pair of connections is provided to the magnetic shield and the main pole of the writer, and resistance of the write head device is measured to detect writer to disk spacing and contact.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.