Multiple-track magneto-resistive certification and thermal asperity test head
US6216242A · kind A · utility
27Cited by
1References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 6, 1999 |
| Grant date | Apr 10, 2001 |
| Priority date | — |
| Expiry date | Jan 6, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0018
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A combination multi-channel magneto-resistive (MR) certification and thermal asperity test head. The test head includes a MR stripe which has multiple taps which define multiple certification test MR stripe segments. Simultaneous connection of sensing logic to the multiple segments of the MR stripe allows for increased magnetic certification speed, and proper connection of sensing circuitry across appropriate taps on the MR stripe allows for testing for thermal asperities over a large portion of the disc surface. Various embodiments of the test head are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.