Disk drive head stack assembly having height-controlled suspension circuit tail tack
US10043541B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2016 |
| Grant date | Aug 7, 2018 |
| Priority date | — |
| Expiry date | Nov 12, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/486
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a disk drive having a flexible circuit tail that is routed within a recess in the actuator arm, a dielectric spacer is added to the top of the tail in order to space the circuit traces within the tail further away from the electrically conductive actuator arm, and to make more repeatable that spacing. The added spacing reduces electrical coupling and thus increases the bandwidth of the circuit. The spacer can be in the form of a section of the same viscoelastic material that is used elsewhere as a vibration dampener on the suspension, the viscoelastic material being adhered to the tail before the tail is inserted within the recess. Alternatively, the spacer can be a thickened region of the flexible circuit covercoat in the area where the tail will reside within the recess.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.