Method for calibrating MR head geometry in selfservo writing disc drives
US6317285A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2000 |
| Grant date | Nov 13, 2001 |
| Priority date | — |
| Expiry date | Oct 26, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0945
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of calibrating magnetoresistive (MR) head geometry for a product head in a selfservo writing disc drive includes the steps of writing a first burst at an inner diameter of a disc surface using the write head of the product head. Next, the first burst is read using the MR read head of the product head, and a first read amplitude of the first burst is determined. From the first read amplitude of the first burst, it is determined which one of a multiple different sets of subsequent inner diameter steps to perform. Then, the one of the multiple different sets of subsequent inner diameter steps is performed to determine a read head width, a write head width, and a read-write offset between the read head and the write head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.