Slider unit controllably actuated at a surface of a moving information recording medium
US5276573A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1991 |
| Grant date | Jan 4, 1994 |
| Priority date | — |
| Expiry date | Dec 2, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/483
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A slider unit having a reading or reproducing head, with the head being adapted to float over a surface of an information recording disc. The slider unit includes a slider body having a flying height sensor with float surfaces on an underside thereof to generate a lifting force. A piezoelectrically or electrostatically controlled valve layer may be positioned over a vent communicating between an upper surface of the slider, with the vent opening to a recess for generating a negative lift component at an underside of the slider unit. The slider body is made from a ceramic base portion and includes a semiconductive insert portion of, for example, silicon or a photosensitive glass with an adjustment device being formed by utilization of microfabrication techniques such as deposition and etching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.