Media certification device design
US8297113B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2009 |
| Grant date | Oct 30, 2012 |
| Priority date | — |
| Expiry date | May 26, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/6005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A glide head with a slider body that has a leading edge, a trailing edge and an air bearing surface is disclosed. The glide head also has an array of thermal proximity sensing elements connected in a bridge circuit that are adjacent both the trailing edge and the air bearing surface, a heating element mounted to the glide body for elevating the temperature of the thermal proximity sensing elements in relation to the temperature of an inspected surface, and a controller coupled to the array of thermal proximity sensing elements. The controller receives signals from the thermal proximity sensing elements, and determines the existence of a surface variation in the inspected surface based upon differences in the signals received from the thermal proximity sensing elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.