Test disk having fluorocarbon resin asperities for magnetic disk drive component testing
US4931338A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 14, 1988 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | Sep 14, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3154
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk for testing the sliders and their supports used in rigid magnetic disk drives has at least one asperity formed of a fluorocarbon resin. Such a test disk when mounted on a spindle and rotated allows testing the mechanical performance of the sliders carrying the data transducing heads in a disk memory by flying the sliders to be tested on the test disk and observing their performance when flying over the resin asperity. A method for producing the asperity involves depositing a drop of a fluorocarbon resin solution on the area of the disk wherever an asperity is desired, drying the solution to leave a small mound of the resin where the drop was deposited, and the no curing the resin by baking. The height of an asperity can be varied by machining or by varying the concentration of the fluorocarbon resin in the solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.