Printed circuit board and magnetic head driving device including the same
US8330054B2 · kind B2 · utility
1Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2010 |
| Grant date | Dec 11, 2012 |
| Priority date | — |
| Expiry date | Dec 1, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/2009
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A plurality of wiring traces are formed on a base insulating layer, and a metal layer is formed on the opposite surface of the base insulating layer. Two adjacent wiring traces constitute a transmission line pair. The width of the wiring trace is set to not more than 250 μm, and the distance between the adjacent wiring traces is set to not less than 8 μm. The thickness of the base insulating layer is selected to cause differential impedance of the transmission line pair to be not less than 10 Ω and not more than 50 Ω.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.