Methods of manufacturing magnetic heads using a trigger reader electronic lapping guide
US9190083B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2013 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | Dec 4, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/6082
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of manufacturing a magnetic read-write head, including the steps of presenting a row bar to a processing location, the row bar including an air bearing surface, at least one read-write head, at least one electronic lapping guide, and at least one trigger device, wherein each electronic lapping guide is positioned at a different distance from the air bearing surface than each trigger device, and wherein the read-write head and at least one of the trigger devices include a multi-layer stack of materials; lapping the air bearing surface while measuring the electrical resistance of at least one electronic lapping guide and at least one trigger device until the resistance measurement of the trigger device provides an open circuit reading, and measuring an offset resistance value of the at least one electronic lapping guide concurrently with the measurement of the open circuit reading by the trigger device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.