Suspension design with split substrate for improved interference signal immunity
US9117469B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2014 |
| Grant date | Aug 25, 2015 |
| Priority date | — |
| Expiry date | Dec 1, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/486
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A “split-substrate” design is described for the metal ground layer in the suspension for a slider for use in a disk drive that reduces crosstalk from signals being transmitted on the conductive traces and allows externally induced interference to be shunted away from sensitive traces along selected portions of the suspension. In embodiments of the invention a slit formed in the metal ground layer to provide two parallel ground paths respectively on the left and right sides of the selected portion of the suspension. By positioning interference signal generating traces like writer traces on one side of the slit, that side becomes the noisy ground path leaving the other side as a “quiet” ground path. The shape, positioning and grounding of the split substrate structure can shunt return/ground currents created by external RFI into the noisy leg and thereby shield the quiet leg.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.