Method for detection of end of grinding of a thin layer magnetic head
US5013394A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1989 |
| Grant date | May 7, 1991 |
| Priority date | — |
| Expiry date | Jun 26, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49048
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention concerns a method for the detection of the end of grinding of at least one thin layer magnetic head, the head comprising, at the stage of implementation of said method, an active face, formed by two magnetic poles (1, 2) separated by a gap (4). The method comprises the following steps: PA1 deposition of a conductive layer (7) on the entire active face (3) PA1 etching of the active face coated with said conductive layer; PA1 deposition of a layer of dielectric material (8) on the etched active face; PA1 grinding of the active face starting from the face that is free of the layer of dielectric material (8) until total removal of that part of the conductive layer (7) located above the gap (4), this removal being detected by the sudden variation in resistivity between the two magnetic poles (1, 2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.